概要信息：

March 2000 1 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 Series
High-Current Low-Dropout Regulators
General Description
The MIC29150/29300/29500/29750 are high current, high
accuracy, low-dropout voltage regulators. Using Micrel's
proprietary Super ßeta PNP™ process with a PNP pass
element, these regulators feature 300mV to 370mV (full load)
dropout voltages and very low ground current. Designed for
high current loads, these devices also find applications in
lower current, extremely low dropout-critical systems, where
their tiny dropout voltage and ground current values are
important attributes.
The MIC29150/29300/29500/29750 are fully protected against
overcurrent faults, reversed input polarity, reversed lead
insertion, overtemperature operation, and positive and nega-
tive transient voltage spikes. Five pin fixed voltage versions
feature logic level ON/OFF control and an error flag which
signals whenever the output falls out of regulation. Flagged
states include low input voltage (dropout), output current
limit, overtemperature shutdown, and extremely high voltage
spikes on the input.
On the MIC29xx1 and MIC29xx2, the ENABLE pin may be
tied to VIN if it is not required for ON/OFF control. The
MIC29150/29300/29500 are available in 3- and 5-pin TO-220
and surface mount TO-263 packages. The MIC29750 7.5A
regulators are available in 3- and 5-pin TO-247 packages.
Features
• High Current Capability
MIC29150/29151/29152/29153 ................................1.5A
MIC29300/29301/29302/29303 ...................................3A
MIC29500/29501/29502/29503 ...................................5A
MIC29750/29751/29752 ...........................................7.5A
• Low-Dropout Voltage ....................... 350mV at Full Load
• Low Ground Current
• Accurate 1% Guaranteed Tolerance
• Extremely Fast Transient Response
• Reverse-battery and “Load Dump” Protection
• Zero-Current Shutdown Mode (5-Pin versions)
• Error Flag Signals Output Out-of-Regulation
(5-Pin versions)
• Also Characterized For Smaller Loads With Industry-
Leading Performance Specifications
• Fixed Voltage and Adjustable Versions
Applications
• Battery Powered Equipment
• High-Efficiency “Green” Computer Systems
• Automotive Electronics
• High-Efficiency Linear Power Supplies
• High-Efficiency Post-Regulator For Switching Supply
Pinout   On all devices, the Tab is grounded.
MIC29150/29300/29500/29750 Three Terminal
Devices:
Pin 1 = Input, 2 = Ground, 3 = Output
MIC29151/29301/29501/29751  Five Terminal
Fixed Voltage Devices:
Pin 1 = Enable, 2 = Input, 3 = Ground, 4 = Output,
5 = Flag
MIC29152/29302/29502/29752 Adjustable with
ON/OFF Control
Pin 1 = Enable, 2 = Input, 3 = Ground, 4 = Output,
5 = Adjust
MIC29153/29303/29503 Adjustable with Flag
Pin 1 = Flag, 2 = Input, 3 = Ground, 4 = Output,
5 = Adjust
1   2   3 1  2 3 4 5
MIC29151/29152/29153BT
MIC29301/29302/29303BT
MIC29501/29502/29503BT
MIC29751/29752BWT
MIC29150/29300/
29500BT and
MIC29750BWT
Pin Configuration
1   2   3
MIC29150/29300BU MIC29151/29152/29153BU
MIC29301/29302/29303BU
MIC29501/29502/29503BU
1  2 3 4   5
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 2 March 2000
Part Number Temp. Range* Volts Current Package
MIC29500-3.3BT –40 to +125°C 3.3 5.0A TO-220
MIC29500-5.0BT –40 to +125°C 5.0 5.0A TO-220
MIC29501-3.3BT –40 to +125°C 3.3 5.0A TO-220-5
MIC29501-5.0BT –40 to +125°C 5.0 5.0A TO-220-5
MIC29501-3.3BU –40 to +125°C 3.3 5.0A TO-263-5
MIC29501-5.0BU –40 to +125°C 5.0 5.0A TO-263-5
MIC29502BT –40 to +125°C Adj 5.0A TO-220-5
MIC29502BU –40 to +125°C Adj 5.0A TO-263-5
MIC29503BT –40 to +125°C Adj 5.0A TO-220-5
MIC29503BU –40 to +125°C Adj 5.0A TO-263-5
MIC29750-3.3BWT –40 to +125°C 3.3 7.5A TO-247-3
MIC29750-5.0BWT –40 to +125°C 5.0 7.5A TO-247-3
MIC29751-3.3BWT –40 to +125°C 3.3 7.5A TO-247-5
MIC29751-5.0BWT –40 to +125°C 5.0 7.5A TO-247-5
MIC29752BWT –40 to +125°C Adj 7.5A TO-247-5
Ordering Information
Part Number Temp. Range* Volts Current Package
MIC29150-3.3BT –40 to +125°C 3.3 1.5A TO-220
MIC29150-4.2BT –40 to +125°C 4.2 1.5A TO-220
MIC29150-5.0BT –40 to +125°C 5.0 1.5A TO-220
MIC29150-12BT –40 to +125°C 12 1.5A TO-220
MIC29150-3.3BU –40 to +125°C 3.3 1.5A TO-263
MIC29150-5.0BU –40 to +125°C 5.0 1.5A TO-263
MIC29150-12BU –40 to +125°C 12 1.5A TO-263
MIC29151-3.3BT –40 to +125°C 3.3 1.5A TO-220-5
MIC29151-5.0BT –40 to +125°C 5.0 1.5A TO-220-5
MIC29151-12BT –40 to +125°C 12 1.5A TO-220-5
MIC29151-3.3BU –40 to +125°C 3.3 1.5A TO-263-5
MIC29151-5.0BU –40 to +125°C 5.0 1.5A TO-263-5
MIC29151-12BU –40 to +125°C 12 1.5A TO-263-5
MIC29152BT –40 to +125°C Adj 1.5A TO-220-5
MIC29152BU –40 to +125°C Adj 1.5A TO-263-5
MIC29153BT –40 to +125°C Adj 1.5A TO-220-5
MIC29153BU –40 to +125°C Adj 1.5A TO-263-5
MIC29300-3.3BT –40 to +125°C 3.3 3.0A TO-220
MIC29300-5.0BT –40 to +125°C 5.0 3.0A TO-220
MIC29300-12BT –40 to +125°C 12 3.0A TO-220
MIC29300-3.3BU –40 to +125°C 3.3 3.0A TO-263
MIC29300-5.0BU –40 to +125°C 5.0 3.0A TO-263
MIC29300-12BU –40 to +125°C 12 3.0A TO-263
MIC29301-3.3BT –40 to +125°C 3.3 3.0A TO-220-5
MIC29301-5.0BT –40 to +125°C 5.0 3.0A TO-220-5
MIC29301-12BT –40 to +125°C 12 3.0A TO-220-5
MIC29301-3.3BU –40 to +125°C 3.3 3.0A TO-263-5
MIC29301-5.0BU –40 to +125°C 5.0 3.0A TO-263-5
MIC29301-12BU –40 to +125°C 12 3.0A TO-263-5
MIC29302BT –40 to +125°C Adj 3.0A TO-220-5
MIC29302BU –40 to +125°C Adj 3.0A TO-263-5
MIC29303BT –40 to +125°C Adj 3.0A TO-220-5
MIC29303BU –40 to +125°C Adj 3.0A TO-263-5
MIC29xx0 versions are 3-terminal fixed voltage devices.
MIC29xx1 are fixed voltage devices with ENABLE and ERROR
flag. MIC29xx2 are adjustable regulators with ENABLE control.
MIC29xx3 are adjustables with an ERROR flag.
* Junction Temperature
March 2000 3 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
Absolute Maximum Ratings
Power Dissipation .................................... Internally Limited
Lead Temperature (Soldering, 5 seconds) ................ 260°C
Storage Temperature Range ................... –65°C to +150°C
Input Supply Voltage (Note 1) ....................... –20V to +60V
Operating Ratings
Operating Junction Temperature ............. –40°C to +125°C
Maximum Operating Input Voltage............................... 26V
TO-220  θJC.............................................................. 2°C/W
TO-263  θJC.............................................................. 2°C/W
TO-247  θJC........................................................... 1.5°C/W
Electrical Characteristics
All measurements at TJ = 25°C unless otherwise noted. Bold values are guaranteed across the operating temperature range.
Adjustable versions are programmed to 5.0V.
Parameter Condition Min Typ Max Units
Output Voltage IO = 10mA –1 1 %
10mA ≤ IO ≤ IFL, (VOUT + 1V) ≤ VIN ≤ 26V (Note 2) –2 2 %
Line Regulation IO = 10mA, (VOUT + 1V) ≤ VIN ≤ 26V 0.06 0.5 %
Load Regulation VIN = VOUT + 5V, 10mA ≤ IOUT ≤ IFULL LOAD (Note 2, 6) 0.2 1 %
∆VO Output Voltage (Note 6) 20 100 ppm/°C
∆T Temperature Coef.
Dropout Voltage ∆VOUT = – 1%, (Note 3)
MIC29150 IO = 100mA 80 200 mV
IO = 750mA 220
IO = 1.5A 350 600
MIC29300 IO = 100mA 80 175
IO = 1.5A 250
IO = 3A 370 600
MIC29500 IO = 250mA 125 250
IO = 2.5A 250
IO = 5A 370 600
MIC29750 IO = 250mA 80 200
IO = 4A 270
IO = 7.5A 425 600
Ground Current MIC29150 IO = 750mA, VIN = VOUT + 1V 8 20 mA
IO = 1.5A 22
MIC29300 IO = 1.5A, VIN = VOUT + 1V 10 35 mA
IO = 3A 37
MIC29500 IO = 2.5A, VIN = VOUT + 1V 15 50 mA
IO = 5A 70
MIC29750 IO = 4A, VIN = VOUT + 1V 35 75 mA
IO = 7.5A 120
IGNDDOGround Pin VIN = 0.5V less than specified VOUT. IOUT = 10mA
Current at Dropout MIC29150 0.9 mA
MIC29300 1.7 mA
MIC29500 2.1 mA
MIC29750 3.1 mA
Current Limit MIC29150 VOUT = 0V (Note 4) 2.1 3.5 A
MIC29300 VOUT = 0V (Note 4) 4.5 5.0 A
MIC29500 VOUT = 0V (Note 4) 7.5 10.0 A
MIC29750 VOUT = 0V (Note 4) 9.5 15 A
en, Output Noise CL = 10µF 400 µV (rms)
    Voltage
  (10Hz to 100kHz) CL = 33µF 260
IL = 100mA
Ground Current in Shutdown MIC29150/1/2/3 only  VEN= 0.4V 2 10 µA
30 µA
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 4 March 2000
Electrical Characteristics (Continued)
Reference MIC29xx2/MIC29xx3
Parameter Conditions Min Typical Max Units
Reference Voltage 1.228 1.240 1.252 V
1.215 1.265 V max
Reference Voltage (Note 8) 1.203 1.277 V
Adjust Pin 40 80 nA
Bias Current 120
Reference Voltage (Note 7) 20 ppm/°C
Temperature
Coefficient
Adjust Pin Bias 0.1 nA/°C
Current Temperature
Coefficient
Flag Output (Error Comparator)  MIC29xx1/29xx3
Output Leakage VOH = 26V 0.01 1.00 µA
Current 2.00
Output Low Device set for 5V. V
IN
 = 4.5V 220 300 mV
Voltage IOL = 250µA 400
Upper Threshold Device set for 5V (Note 9) 40 60 mV
Voltage 25
Lower Threshold Device set for 5V (Note 9) 75 95 mV
Voltage 140
Hysteresis Device set for 5V (Note 9) 15 mV
ENABLE Input
Input Logic Voltage V
Low  (OFF) 0.8
High (ON) 2.4
Enable Pin V
EN
 = 26V 100 600 µA
Input Current 750
V
EN
 =0.8V 1 µA
2
Regulator Output (Note 10) 10 µA
Current in Shutdown 500
MIC29xx1/MIC29xx2
March 2000 5 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
Notes
Note 1: Maximum positive supply voltage of 60V must be of limited duration (<100msec) and duty cycle (≤1%). The maximum continuous supply
voltage is 26V.
Note 2: Full Load current (IFL) is defined as 1.5A for the MIC29150, 3A for the MIC29300, 5A for the MIC29500, and 7.5A for the MIC29750 families.
Note 3: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value with VOUT + 1V applied
to VIN
Note 4: VIN = VOUT (nominal) + 1V. For example, use VIN = 4.3V for a 3.3V regulator or use 6V for a 5V regulator. Employ pulse-testing procedures to
minimize temperature rise.
Note 5: Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the ground
pin current.
Note 6: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 7: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a 200mA load pulse at VIN = 20V (a 4W pulse) for T = 10ms.
Note 8: VREF ≤ VOUT ≤ (VIN – 1 V), 2.3V ≤ VIN ≤ 26V, 10mA < IL ≤ IFL, TJ ≤ TJ MAX.
Note 9: Comparator thresholds are expressed in terms of a voltage differential at the Adjust terminal below the nominal reference voltage measured at
6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT /VREF = (R1 + R2)/R2. For
example, at a programmed output voltage of 5V, the Error output is guaranteed to go low when the output drops by 95 mV x 5V/1.240 V = 384
mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal,
7.7% guaranteed.
Note 10: VEN ≤ 0.8V and VIN ≤ 26V, VOUT = 0.
Note 11: When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to
ground.
Block Diagram
Reference
28V
O.V.
ILIMIT
Thermal
Shut-
down
1.240V1.180V
EN
IN
FLAG
GND
OUT
ADJ†
R1*
R2*
* Feedback network in fixed versions only
† Adjustable version only
Typical Applications
Figure 1. Fixed output voltage. Figure 2. Adjustable output voltage configuration. For
best results, the total series resistance should be small
enough to pass the minimum regulator load current.
MIC29500-3.3
5V ± 5%
47µF
3.3V ± 1% @ 5A
R1
R2
VOUT = 1.240V × [1 + (R1 / R2)]
VIN VOUT
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 6 March 2000
Typical Characteristics MIC2915x
0
50
100
150
200
250
300
350
400
450
0.0 0.5 1.0 1.5
D
R
O
P
O
U
T
 V
O
LT
A
G
E
 (
m
V
)
OUTPUT CURRENT (A)
MIC2915x Dropout Voltage
vs. Output Current
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
-60 -30 0 30 60 90 120 150
D
R
O
P
O
U
T
 V
O
LT
A
G
E
 (
V
)
TEMPERATURE (°C)
MIC2915x Dropout Voltage
vs. Temperature
ILOAD = 1.5A
0.0
1.0
2.0
3.0
4.0
5.0
0 1 2 3 4 5 6
O
U
T
P
U
T
 V
O
LT
A
G
E
 (
V
)
INPUT VOLTAGE (V)
MIC29150-5.0
Dropout Characteristics
IOUT = 10mA
IOUT = 1.5A
0
5
10
15
20
25
0.0 0.4 0.8 1.2 1.6
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
OUTPUT CURRENT (A)
MIC2915x Ground Current
vs. Output Current
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0 2 4 6 8 10
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
SUPPLY VOLTAGE (V)
MIC2915x Ground Current
vs. Supply Voltage
VOUT = 5V
ILOAD = 10mA
0
10
20
30
40
50
60
0 2 4 6 8 10
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
SUPPLY VOLTAGE (V)
MIC2915x Ground Current
vs. Supply Voltage
MIC29152
IOUT = 1.5A
0
50
100
150
200
250
300
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
µA
)
TEMPERATURE (°C)
MIC2915x Ground Current
vs. Temperature
ILOAD = 10mA
0.0
0.5
1.0
1.5
2.0
2.5
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2915x Ground Current
vs. Temperature
ILOAD = 250mA
0
5
10
15
20
25
30
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2915x Ground Current
vs. Temperature
ILOAD = 1.5A
3.20
3.22
3.24
3.26
3.28
3.30
3.32
3.34
3.36
3.38
3.40
-60 -30 0 30 60 90 120 150
O
U
T
P
U
T
 V
O
LT
A
G
E
 (
V
)
TEMPERATURE (°C)
MIC29150-3.3 Output
Voltage vs. Temperature
3 DEVICES
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-60 -30 0 30 60 90 120 150
C
U
R
R
E
N
T
 (
A
)
TEMPERATURE (°C)
MIC29150-3.3 Short Circuit
Current vs. Temperature
VOUT = 0V
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
-30 -20 -10 0 10 20 30
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
µA
)
INPUT VOLTAGE (V)
MIC2915x Ground Current
vs. Input Voltage
RLOAD = 100Ω
VOUT = 5V
March 2000 7 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
0
5
10
15
20
25
30
-60 -30 0 30 60 90 120 150
E
N
A
B
LE
 C
U
R
R
E
N
T
 (
µA
)
TEMPERATURE (°C)
MIC29151-xx/2 Enable Current
vs. Temperaure
VEN = 5V
VEN = 2V
-200
0
200
400
∆ 
O
U
T
P
U
T
 (
m
V
)
-0.5
0.0
0.5
1.0
1.5
2.
-5 0 5 10 15 20 25
O
U
T
P
U
T
 (
A
)
TIME (ms)
MIC2915x
Load Transient
COUT = 10 µF
ILOAD = 10mA
-200
-100
0
100
200
∆ 
O
U
T
P
U
T
 (
m
V
)
-0.5
0.0
0.5
1.0
1.5
2.
-5 0 5 10 15 20 25
O
U
T
P
U
T
 (
A
)
TIME (ms)
MIC2915x
Load Transient
COUT = 100 µF
ILOAD = 10mA
0
10
20
30
40
50
-60 -30 0 30 60 90 120 150
A
D
JU
S
T
 P
IN
 C
U
R
R
E
N
T
 (
nA
)
TEMPERATURE (°C)
MIC29152/3 Adjust Pin Current
vs. Temperature
ILOAD = 10mA
-20
-10
0
10
20
30
∆ 
O
U
T
P
U
T
 (
m
V
)
4
6
8
1
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
IN
P
U
T
 (
V
)
TIME (ms)
MIC2915x
Line Transient
COUT = 10 µF
ILOAD = 10mA
-5
0
5
10
∆ 
O
U
T
P
U
T
 (
m
V
)
4
6
8
10
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
IN
P
U
T
 (
V
)
TIME (ms)
MIC2915x
Line Transient
COUT = 100 µF
ILOAD = 10mA
0.001
0.01
0.1
1
10
10
x1
00
10
0x
10
0
1x
10
3
10
x1
03
10
0x
10
3
1x
10
6
O
U
T
P
U
T
 IM
P
E
D
A
N
C
E
 (
Ω
)
FREQUENCY (Hz)
MIC2915x Output Impedance
vs. Frequency
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 8 March 2000
Typical Characteristics MIC2930x
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0 1 2 3
D
R
O
P
O
U
T
 V
O
LT
A
G
E
 (
V
)
OUTPUT CURRENT (A)
MIC2930x Dropout Voltage
vs. Output Current
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
-60 -30 0 30 60 90 120 150
D
R
O
P
O
U
T
 V
O
LT
A
G
E
 (
V
)
TEMPERATURE (°C)
MIC2930x Dropout Voltage
vs. Temperature
ILOAD = 3A
0.0
1.0
2.0
3.0
4.0
5.0
0 2 4 6
O
U
T
P
U
T
 V
O
LT
A
G
E
 (
V
)
INPUT VOLTAGE (V)
MIC29300-3.3
Dropout Characteristics
ILOAD = 3A
ILOAD = 10mA
0
10
20
30
40
50
0 1 2 3
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
OUTPUT CURRENT (A)
MIC2930x Ground Current
vs. Output Current
0.0
0.5
1.0
1.5
2.0
0 2 4 6 8 10
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
SUPPLY VOLTAGE (V)
MIC2930x Ground Current
vs. Supply Voltage
FIXED 3.3V DEVICE
RLOAD = 100Ω
0
25
50
75
100
125
0 2 4 6 8 10
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
SUPPLY VOLTAGE (V)
MIC2930x Ground Current
vs. Supply Voltage
FIXED 3.3V
IOUT = 3A
0.0
0.1
0.2
0.3
0.4
0.5
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2930x Ground Current
vs. Temperature
IOUT = 10mA
0.0
0.5
1.0
1.5
2.0
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2930x Ground Current
vs. Temperature
IOUT = 250mA
0
10
20
30
40
50
60
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2930x Ground Current
vs. Temperature
IOUT = 3A
3.20
3.22
3.24
3.26
3.28
3.30
3.32
3.34
3.36
3.38
3.40
-60 -30 0 30 60 90 120 150
O
U
T
P
U
T
 V
O
LT
A
G
E
 (
V
)
TEMPERATURE (°C)
MIC29300-3.3 Output Voltage
vs. Temperature
3 DEVICES
0
1
2
3
4
5
6
7
8
-60 -30 0 30 60 90 120 150
C
U
R
R
E
N
T
 (
A
)
TEMPERATURE (°C)
MIC29300-5.0 Short Circuit
Current vs. Temperature
VOUT = 0V
-0.5
0.0
0.5
1.0
1.5
2.0
-30 -20 -10 0 10 20 30
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
INPUT VOLTAGE (V)
MIC2930x Ground Current
vs. Input Voltage
RLOAD = 100Ω
March 2000 9 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
0
5
10
15
20
25
30
-60 -30 0 30 60 90 120 150
E
N
A
B
LE
 C
U
R
R
E
N
T
 (
µA
)
TEMPERATURE (°C)
MIC29301-x/2 Enable Current
vs. Temperaure
VEN = 5V
VEN = 2V
-200
0
200
400
600
800
∆ 
O
U
T
P
U
T
 (
m
V
)
-1
0
1
2
3
4
-5 0 5 10 15 20 25
O
U
T
P
U
T
 (
A
)
TIME (ms)
MIC2930x
Load Transient
COUT = 10 µF
ILOAD = 10mA
-100
-50
0
50
100
∆ 
O
U
T
P
U
T
 (
m
V
)
-1
0
1
2
3
4
-5 0 5 10 15 20 25
O
U
T
P
U
T
 (
A
)
TIME (ms)
MIC2930x
Load Transient
COUT = 100 µF
ILOAD = 10mA
0
10
20
30
40
50
-60 -30 0 30 60 90 120 150
A
D
JU
S
T
 P
IN
 C
U
R
R
E
N
T
 (
nA
)
TEMPERATURE (°C)
MIC29302/3 Adjust Pin Current
vs. Temperature
ILOAD = 10mA -40
-20
0
20
40
∆ 
O
U
T
P
U
T
 (
m
V
)
2.3
4.3
6.3
8.3
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
IN
P
U
T
 (
V
)
TIME (ms)
MIC2930x
Line Transient
COUT = 10 µF
ILOAD = 10mA
-10
-5
0
5
10
15
∆ 
O
U
T
P
U
T
 (
m
V
)
2.3
4.3
6.3
8.3
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
IN
P
U
T
 (
V
)
TIME (ms)
MIC2930x
Line Transient
COUT = 100 µF
ILOAD = 10mA
0.001
0.01
0.1
1
10
10
x1
00
10
0x
10
0
1x
10
3
10
x1
03
10
0x
10
3
1x
10
6
O
U
T
P
U
T
 IM
P
E
D
A
N
C
E
 (
Ω
)
FREQUENCY (Hz)
MIC2930x Output Impedance
vs. Frequency
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 10 March 2000
Typical Characteristics MIC2950x
0
50
100
150
200
250
300
350
400
450
0 1 2 3 4 5
D
R
O
P
O
U
T
 V
O
LT
A
G
E
 (
V
)
OUTPUT CURRENT (A)
MIC2950x Dropout Voltage
vs. Output Current
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
-60 -30 0 30 60 90 120 150
D
R
O
P
O
U
T
 V
O
LT
A
G
E
 (
V
)
TEMPERATURE (°C)
MIC2950x Dropout Voltage
vs. Temperature
ILOAD = 5A
0.0
1.0
2.0
3.0
4.0
5.0
0 2 4 6
O
U
T
P
U
T
 V
O
LT
A
G
E
 (
V
)
INPUT VOLTAGE (V)
MIC29500-3.3
Dropout Characteristics
ILOAD = 5A
ILOAD = 10mA
0
10
20
30
40
50
60
70
80
0 1 2 3 4 5 6
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
OUTPUT CURRENT (A)
MIC2950x Ground Current
vs. Output Current
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0 2 4 6 8 10
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
SUPPLY VOLTAGE (V)
MIC2950x Ground Current
vs. Supply Voltage
FIXED 3.3V VERSIONS
RLOAD = 100Ω
0
25
50
75
100
125
0 1 2 3 4 5
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
SUPPLY VOLTAGE (V)
MIC2950x Ground Current
vs. Supply Voltage
FIXED 3.3V
VERSION
ILOAD = 5A
0.0
0.1
0.2
0.3
0.4
0.5
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2950x Ground Current
vs. Temperature
IOUT = 10mA
0
1
2
3
4
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2950x Ground Current
vs. Temperature
IOUT = 500mA
0
25
50
75
100
125
150
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2950x Ground Current
vs. Temperature
IOUT = 5A
3.20
3.22
3.24
3.26
3.28
3.30
3.32
3.34
3.36
3.38
3.40
-60 -30 0 30 60 90 120 150
O
U
T
P
U
T
 V
O
LT
A
G
E
 (
V
)
TEMPERATURE (°C)
MIC29500-3.3 Output Voltage
vs. Temperature
3 DEVICES
0
1
2
3
4
5
6
7
8
9
10
-60 -30 0 30 60 90 120 150
C
U
R
R
E
N
T
 (
A
)
TEMPERATURE (°C)
MIC2950x-5.0 Short Circuit
Current vs. Temperature
VOUT = 0V
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-30 -20 -10 0 10 20 30
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
INPUT VOLTAGE (V)
MIC2950x Ground Current
vs. Input Voltage
RLOAD = 100Ω
March 2000 11 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
0
5
10
15
20
25
30
-60 -30 0 30 60 90 120 150
E
N
A
B
LE
 C
U
R
R
E
N
T
 (
µA
)
TEMPERATURE (°C)
MIC29501-xx/2 Enable Current
vs. Temperaure
VEN = 5V
VEN = 2V
-500
0
500
1000
1500
∆ 
O
U
T
P
U
T
 (
m
V
)
-1
0
1
2
3
4
5
6
-5 0 5 10 15 20 25
O
U
T
P
U
T
 (
A
)
TIME (ms)
MIC2950x
Load Transient
COUT = 10 µF
ILOAD = 10mA
-100
-50
0
50
100
∆ 
O
U
T
P
U
T
 (
m
V
)
-1
0
1
2
3
4
5
6
-5 0 5 10 15 20 25
O
U
T
P
U
T
 (
A
)
TIME (ms)
MIC2950x
Load Transient
COUT = 100 µF
ILOAD = 10mA
0
10
20
30
40
50
60
70
80
-60 -30 0 30 60 90 120 150
A
D
JU
S
T
 P
IN
 C
U
R
R
E
N
T
 (
nA
)
TEMPERATURE (°C)
MIC29502/3 Adjust Pin Current
vs. Temperature
ILOAD = 10mA
-100
-50
0
50
100
∆ 
O
U
T
P
U
T
 (
m
V
)
2.2
4.2
6.2
8.2
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
IN
P
U
T
 (
V
)
TIME (ms)
MIC2950x
Line Transient
COUT = 10 µF
ILOAD = 10mA
-20
-10
0
10
20
∆ 
O
U
T
P
U
T
 (
m
V
)
2.2
4.2
6.2
8.2
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
IN
P
U
T
 (
V
)
TIME (ms)
MIC2950x
Line Transient
COUT = 100 µF
ILOAD = 10mA
0.001
0.01
0.1
1
10
10
x1
00
10
0x
10
0
1x
10
3
10
x1
03
10
0x
10
3
1x
10
6
O
U
T
P
U
T
 IM
P
E
D
A
N
C
E
 (
Ω
)
FREQUENCY (Hz)
MIC2950x Output Impedance
vs. Frequency
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 12 March 2000
Typical Characteristics MIC2975x
0
50
100
150
200
250
300
350
400
450
0 1 2 3 4 5 6 7 8
D
R
O
P
O
U
T
 V
O
LT
A
G
E
 (
m
V
)
OUTPUT CURRENT (A)
MIC2975x Dropout Voltage
vs. Output Current
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-60 -30 0 30 60 90 120 150
D
R
O
P
O
U
T
 V
O
LT
A
G
E
 (
V
)
TEMPERATURE (°C)
MIC2975x Dropout Voltage
vs. Temperature
0.0
1.0
2.0
3.0
4.0
5.0
0 2 4 6
O
U
T
P
U
T
 V
O
LT
A
G
E
 (
V
)
INPUT VOLTAGE (V)
MIC29750-3.3
Dropout Characteristics
ILOAD = 7.5A
ILOAD = 10mA
0
20
40
60
80
100
120
0 1 2 3 4 5 6 7 8
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
OUTPUT CURRENT (A)
MIC2975x Ground Current
vs. Output Current
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0 2 4 6 8 10
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
SUPPLY VOLTAGE (V)
MIC2975x Ground Current
vs. Supply Voltage
FIXED 3.3V
VERSION
IOUT = 10mA
0
25
50
75
100
125
150
175
0 2 4 6 8
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
SUPPLY VOLTAGE (V)
MIC2975x Ground Current
vs. Supply Voltage
FIXED 3.3V VERSION
ILOAD = 7.5A
0.0
0.1
0.2
0.3
0.4
0.5
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2975x Ground Current
vs. Temperature
IOUT = 10mA
0
1
2
3
4
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2975x Ground Current
vs. Temperature
IOUT = 250mA
0
50
100
150
200
-60 -30 0 30 60 90 120 150
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
TEMPERATURE (°C)
MIC2975x Ground Current
vs. Temperature
IOUT = 7.5A
3.20
3.22
3.24
3.26
3.28
3.30
3.32
3.34
3.36
3.38
3.40
-60 -30 0 30 60 90 120 150
O
U
T
P
U
T
 V
O
LT
A
G
E
 (
V
)
TEMPERATURE (°C)
MIC29750-3.3 Output Voltage
vs. Temperature
3 DEVICES
0
1
2
3
4
5
6
7
8
9
10
11
12
-60 -30 0 30 60 90 120 150
C
U
R
R
E
N
T
 (
A
)
TEMPERATURE (°C)
MIC29750-5.0 Short Circuit
Current vs. Temperature
VOUT = 0V
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-30 -20 -10 0 10 20 30
G
R
O
U
N
D
 C
U
R
R
E
N
T
 (
m
A
)
INPUT VOLTAGE (V)
MIC2975x Ground Current
vs. Input Voltage
RLOAD = 100Ω
March 2000 13 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
0
5
10
15
20
25
30
-60 -30 0 30 60 90 120 150
E
N
A
B
LE
 C
U
R
R
E
N
T
 (
µA
)
TEMPERATURE (°C)
MIC29751-xx/2 Enable Current
vs. Temperaure
VEN = 5V
VEN = 2V
-500
0
500
1000
1500
∆ 
O
U
T
P
U
T
 (
m
V
)
-2.5
0.0
2.5
5.0
7.5
10.
-5 0 5 10 15 20 25
O
U
T
P
U
T
 (
A
)
TIME (ms)
MIC2975x
Load Transient
COUT = 10 µF
ILOAD = 10mA
-200
-100
0
100
200
300
∆ 
O
U
T
P
U
T
 (
m
V
)
-2.5
0.0
2.5
5.0
7.5
10.
-5 0 5 10 15 20 25
O
U
T
P
U
T
 (
A
)
TIME (ms)
MIC2975x
Load Transient
COUT = 100 µF
ILOAD = 10mA
0
10
20
30
40
50
60
70
80
-60 -30 0 30 60 90 120 150
A
D
JU
S
T
 P
IN
 C
U
R
R
E
N
T
 (
nA
)
TEMPERATURE (°C)
MIC29752/3 Adjust Pin Current
vs. Temperature
ILOAD = 10mA
-100
-50
0
50
100
∆ 
O
U
T
P
U
T
 (
m
V
)
2.3
4.3
6.3
8.3
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
IN
P
U
T
 (
V
)
TIME (ms)
MIC2975x
Line Transient
COUT = 10 µF
ILOAD = 10mA
-20
-10
0
10
20
30
∆ 
O
U
T
P
U
T
 (
m
V
)
2.3
4.3
6.3
8.3
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
IN
P
U
T
 (
V
)
TIME (ms)
MIC2975x
Line Transient
COUT = 100 µF
ILOAD = 10mA
0.001
0.01
0.1
1
10
10
x1
00
10
0x
10
0
1x
10
3
10
x1
03
10
0x
10
3
1x
10
6
O
U
T
P
U
T
 IM
P
E
D
A
N
C
E
 (
Ω
)
FREQUENCY (Hz)
MIC2975x Output Impedance
vs. Frequency
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 14 March 2000
Applications Information
The MIC29150/29300/29500/29750 are high performance
low-dropout voltage regulators suitable for all moderate to
high-current voltage regulator applications. Their 300mV to
400mV dropout voltage at full load make them especially
valuable in battery powered systems and as high efficiency
noise filters in “post-regulator” applications. Unlike older
NPN-pass transistor designs, where the minimum dropout
voltage is limited by the base-emitter voltage drop and
collector-emitter saturation voltage, dropout performance of
the PNP output of these devices is limited merely by the low
VCE saturation voltage.
A trade-off for the low dropout voltage is a varying base drive
requirement. But Micrel’s Super ßeta PNP™ process re-
duces this drive requirement to merely 1% of the load current.
The MIC29150–29750 family of regulators is fully protected
from damage due to fault conditions. Current limiting is
provided. This limiting is linear; output current under overload
conditions is constant. Thermal shutdown disables the de-
vice when the die temperature exceeds the 125°C maximum
safe operating temperature. Transient protection allows de-
vice (and load) survival even when the input voltage spikes
between –20V and +60V. When the input voltage exceeds
about 35V to 40V, the overvoltage sensor temporarily dis-
ables the regulator. The output structure of these regulators
allows voltages in excess of the desired output voltage to be
applied without reverse current flow. MIC29xx1 and MIC29xx2
versions offer a logic level ON/OFF control: when disabled,
the devices draw nearly zero current.
An additional feature of this regulator family is a common
pinout: a design’s current requirement may change up or
down yet use the same board layout, as all of these regulators
have identical pinouts.
OUT VOUTIN
GND
VIN
Figure 3. Linear regulators require only two capacitors
for operation.
Thermal Design
Linear regulators are simple to use. The most complicated
design parameters to consider are thermal characteristics.
Thermal design requires the following application-specific
parameters:
•  Maximum ambient temperature, TA
•  Output Current, IOUT
•  Output Voltage, VOUT
•  Input Voltage, VIN
First, we calculate the power dissipation of the regulator from
these numbers and the device parameters from this datasheet.
P I 1.01V VD OUT IN OUT= −( )
Where the ground current is approximated by 1% of IOUT.
Then the heat sink thermal resistance is determined with this
formula:
θ θ θSA
J MAX A
D
JC CS
T T
P
=
−
− +( )
Where TJ MAX ≤ 125°C and θCS is between 0 and 2°C/W.
The heat sink may be significantly reduced in applications
where the minimum input voltage is known and is large
compared with the dropout voltage. Use a series input
resistor to drop excessive voltage and distribute the heat
between this resistor and the regulator. The low dropout
properties of Micrel Super ßeta PNP regulators allow very
significant reductions in regulator power dissipation and the
associated heat sink without compromising performance.
When this technique is employed, a capacitor of at least
0.1µF is needed directly between the input and regulator
ground.
Please refer to Application Note 9 and Application Hint 17 for
further details and examples on thermal design and heat sink
specification.
Capacitor Requirements
For stability and minimum output noise, a capacitor on the
regulator output is necessary. The value of this capacitor is
dependent upon the output current; lower currents allow
smaller capacitors. MIC29150—29750 regulators are stable
with the following minimum capacitor values at full load:
Device Full Load Capacitor
MIC29150 .............................. 10µF
MIC29300 .............................. 10µF
MIC29500 .............................. 10µF
MIC29750 .............................. 22µF
This capacitor need not be an expensive low ESR type:
aluminum electrolytics are adequate. In fact, extremely low
ESR capacitors may contribute to instability. Tantalum ca-
pacitors are recommended for systems where fast load
transient response is important.
Where the regulator is powered from a source with a high AC
impedance, a 0.1µF capacitor connected between Input and
GND is recommended. This capacitor should have good
characteristics to above 250kHz.
Minimum Load Current
The MIC29150–29750 regulators are specified between fi-
nite loads. If the output current is too small, leakage currents
dominate and the output voltage rises. The following mini-
mum  load current swamps any expected leakage current
across the operating temperature range:
March 2000 15 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
Device Minimum Load
MIC29150 .................................................... 5mA
MIC29300 .................................................... 7mA
MIC29500 .................................................. 10mA
MIC29750 .................................................. 10mA
Adjustable Regulator Design
R1
R2
VOUT = 1.235V × [1 + (R1 / R2)]
VIN VOUT
MIC29152BT
22µF10µF
Figure 4. Adjustable Regulator with Resistors
The adjustable regulator versions, MIC29xx2 and MIC29xx3,
allow programming the output voltage anywhere between
1.25V and the 26V maximum operating rating of the family.
Two resistors are used. Resistors can be quite large, up to
1MΩ, because of the very high input impedance and low bias
current of the sense comparator: The resistor values are
calculated by:
R R
V
1.2401 2
OUT= −



1
Where VO is the desired output voltage. Figure 4 shows
component definition. Applications with widely varying load
currents may scale the resistors to draw the minimum load
current required for proper operation (see above).
Error Flag
MIC29xx1 and MIC29xx3 versions feature an Error Flag,
which looks at the output voltage and signals an error
condition when this voltage drops 5% below its expected
value. The error flag is an open-collector output that pulls low
under fault conditions. It may sink 10mA. Low output voltage
signifies a number of possible problems, including an over-
current fault (the device is in current limit) and low input
voltage. The flag output is inoperative during overtempera-
ture shutdown conditions.
Enable Input
MIC29xx1 and MIC29xx2 versions feature an enable (EN)
input that allows ON/OFF control of the device. Special
design allows “zero” current drain when the device is dis-
abled—only microamperes of leakage current flows. The EN
input has TTL/CMOS compatible thresholds for simple inter-
facing with logic, or may be directly tied to ≤ 30V. Enabling the
regulator requires approximately 20µA of current.
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 16 March 2000
Package Information
0.018 ±0.008
(0.46 ±0.020)
0.100 ±0.005
(2.54 ±0.13)
0.030 ±0.003
(0.76 ±0.08)
0.050 ±0.003
(1.27 ±.08)
7°
1.140 ±0.010
(28.96 ±0.25)
0.356 ±0.005
(9.04 ±0.13)
0.590 ±0.005
(14.99 ±0.13)
0.108 ±0.005
(2.74 ±0.13)
0.050 ±0.005
(1.27 ±0.13)
0.151 D ±0.005
(3.84 D ±0.13)
0.410 ±0.010
(10.41 ±0.25)
0.176 ±0.005
(4.47 ±0.13)
0.100 ±0.020
(2.54 ±0.51)
0.818 ±0.005
(20.78 ±0.13)
7°
3°
DIMENSIONS: INCH
(MM)
3-Lead TO-220 (T)
 0.360±0.005
 0.600±0.025
 0.405±0.005
 0.100  BSC  0.050
 0.050 ±0.005
 0.176 ±0.005
8° MAX  0.100 ±0.01
 0.050±0.005
 0.015 ±0.002
 0.004+0.004
–0.008
SEATING PLANE
 0.065 ±0.010
20°±2°
DIM. =  INCH
3-Lead TO-263 (U)
March 2000 17 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
0.040 – 0.060
(1.016 – 1.524)
0.780 – 0.820
(19.812 – 20.828)
0.860 – 0.880
(21.844 – 22.352)
0.200
(5.080)
BSC
0.110 – 0.130
(2.794 – 3.302)
0.070 – 0.090
(1.778 – 2.286)
0.250
(6.350)
MAX
MOUNTING HOLE
0.125
(3.175)
DIA TYP 0.620 – 0.640
(15.748 – 16.256)
0.160 – 0.180
(4.064 – 4.572)
0.180 – 0.200
(4.572 – 5.080)
0.190 – 0.210
(4.826 – 5.334)
0.070 – 0.090
(1.778 – 2.286)
0.025 – 0.035
(0.635 – 0.889)
7° TYP
15° TYP
15° TYP
inch
(mm)
Dimensions:
3-Lead TO-247 (WT)
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 18 March 2000
0.018 ±0.008
(0.46 ±0.20)0.268 REF
(6.81 REF)
0.032 ±0.005
(0.81 ±0.13)
 0.550 ±0.010
(13.97 ±0.25)
7°
Typ.
SEATING
PLANE
0.578 ±0.018
(14.68 ±0.46)
0.108 ±0.005
(2.74 ±0.13)
0.050 ±0.005
(1.27 ±0.13)
 0.150 D ±0.005
(3.81 D ±0.13)
0.400 ±0.015
(10.16 ±0.38)
 0.177 ±0.008
(4.50 ±0.20)
0.103 ±0.013
(2.62±0.33)
0.241 ±0.017
(6.12 ±0.43)
0.067 ±0.005
(1.70 ±0.127)
inch
(mm)
Dimensions:
5-Lead TO-220 (T)
 0.067±0.005  0.032 ±0.003
 0.360±0.005
 0.600±0.025
 0.405±0.005
 0.060 ±0.005
 0.176 ±0.005
8° MAX  0.100 ±0.01
 0.050±0.005
 0.015 ±0.002
 0.004+0.004
–0.008
SEATING PLANE
 0.065 ±0.010
20°±2°
DIM. =  INCH
5-Lead TO-263 (U)
March 2000 19 MIC29150/29300/29500/29750
MIC29150/29300/29500/29750 Micrel
0.040 – 0.055
(1.02 – 1.40)
0.780 – 0.800
(19.81 – 20.32)
0.819 – 0.844
(20.80 – 21.44)
0.100 BSC
(2.54 BSC)
MOUNTING HOLE
0.140 – 0.143
(3.56 – 3.63)
DIA TYP 0.620 – 0.640
(15.75 – 16.26)
0.170 – 0.216
(4.32 – 5.49)
0.180 – 0.200
(4.57 – 5.08)
0.185 – 0.208
(4.70 – 5.28)
0.080 – 0.100
(2.03 – 2.54)
0.016 – 0.031
(0.41 – 0.79)
0.242 BSC
(6.15 BSC)
inch
(mm)
Dimensions:
5-Lead TO-247 (WT)
MIC29150/29300/29500/29750 Micrel
MIC29150/29300/29500/29750 20 March 2000
MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800  FAX + 1 (408) 944-0970  WEB http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 2000 Micrel Incorporated