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MIC29372WT

Part # MIC29372WT
Description IC REG LDO ADJ 0.75A TO220-5
Category RECTIFIER
Availability In Stock
Qty 4
Qty Price
1 + $2.05077
Manufacturer Available Qty
Micrel
Date Code: 0651
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

MIC2937A/29371/29372 Micrel, Inc.
May 2006 1 MIC2937A/29371/29372
Features
• High output voltage accuracy
• Guaranteed 750mA output
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Input can withstand –20V reverse battery and +60V posi-
tive transients
• Error flag warns of output dropout
• Logic-controlled electronic shutdown
• Output programmable from 1.24V to 26V(MIC29372)
• Available in TO-220, TO-263, TO-220-5, and TO-263-5
packages.
Applications
• Battery Powered Equipment
• Cellular Telephones
• Laptop, Notebook, and Palmtop Computers
• PCMCIA V
CC
and V
PP
Regulation/Switching
• Bar Code Scanners
• Automotive Electronics
• SMPS Post-Regulator/ DC to DC Modules
• High Efficiency Linear Power Supplies
Pin Configuration
GROUND OUTPUTINPUT
TO-220-5 Package
(MIC29371/29372BT/WT)
TO-220 Package
(MIC2937A-xxBT/WT)
General Description
The MIC2937A family are “bulletproof” efficient voltage regu-
lators with very low dropout voltage (typically 40mV at light
loads and 300mV at 500mA), and very low quiescent current
(160µA typical). The quiescent current of the MIC2937A in-
creases only slightly in dropout, thus prolonging battery life.
Key MIC2937A features include protection against reversed
battery, fold-back current limiting, and automotive “load dump”
protection (60V positive transient).
The MIC2937 is available in several configurations. The
MIC2937A-xx devices are three pin fixed voltage regulators
with 3.3V, 5V, and 12V outputs available. The MIC29371 is
a fixed regulator offering logic compatible ON/OFF switching
input and an error flag output. This flag may also be used as
a power-on reset signal. A logic-compatible shutdown input
is provided on the adjustable MIC29372, which enables the
regulator to be switched on and off.
TO-263 Package
(MIC2937A-xxBU/WU)
GROUND
OUTPUTINPUT
TO-263-5 Package
(MIC29371/29372BU/WU)
Five Lead Package Pin Functions:
MIC29371 MIC29372
1) Error Adjust
2) Input Shutdown
3) Ground Ground
4) Output Input
5) Shutdown Output
The TAB is Ground on the TO-220 and TO-263 packages.
MIC2937A/29371/29372
750mA Low-Dropout Voltage Regulator
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
21 3
1 2 3 4 5
21 3
1 2 3 4 5
MIC2937A/29371/29372 Micrel, Inc.
MIC2937A/29371/29372 2 May 2006
Ordering Information
Part Number
Voltage Junction Temp. Range
Package
Standard RoHS Compliant*
MIC2937A-3.3BU MIC2937A-3.3WU 3.3V –40ºC to +125ºC TO-263-3
MIC2937A-3.3BT MIC2937A-3.3WT 3.3V –40ºC to +125ºC TO-220-3
MIC2937A-5.0BU MIC2937A-5.0WU 5.0V –40ºC to +125ºC TO-263-3
MIC2937A-5.0BT MIC2937A-5.0WT 5.0V –40ºC to +125ºC TO-220-3
MIC2937A-12BU MIC2937A-12WU 12V –40ºC to +125ºC TO-263-3
MIC2937A-12BT MIC2937A-12WT 12V –40ºC to +125ºC TO-220-3
MIC29371-3.3BU MIC29371-3.3WU 3.3V –40ºC to +125ºC TO-263-5
MIC29371-3.3BT MIC29371-3.3WT 3.3V –40ºC to +125ºC TO-220-5
MIC29371-5.0BU MIC29371-5.0WU 5.0V –40ºC to +125ºC TO-263-5
MIC29371-5.0BT MIC29371-5.0WT 5.0V –40ºC to +125ºC TO-220-5
MIC29371-12BU MIC29371-12WU 12V –40ºC to +125ºC TO-263-5
MIC29371-12BT MIC29371-12WT 12V –40ºC to +125ºC TO-220-5
MIC29372BU MIC29372WU ADJ –40ºC to +125ºC TO-263-5
MIC29372BT MIC29372WT ADJ –40ºC to +125ºC TO-220-5
* RoHS compliant with ‘high-melting solder’ exemption.
MIC2937A/29371/29372 Micrel, Inc.
May 2006 3 MIC2937A/29371/29372
Electrical Characteristics
Limits in standard typeface are for T
J
= 25°C and limits in boldface apply over the full operating temperature range. Unless other-
wise specified, V
IN
= V
OUT
+ 1V, I
L
= 5mA, C
L
= 10µF. The MIC29372 are programmed for a 5V output voltage, and V
SHUTDOWN
≤ 0.6V
(MIC29371-xx and MIC29372 only).
Symbol Parameter Conditions Min Typical Max Units
V
O
Output Voltage Variation from factory trimmed V
OUT
–1 1 %
Accuracy –2 2
5mA ≤ I
L
≤ 500mA –2.5 2.5
MIC2937A-12 and 29371-12 only: –1.5 1.5
–3 3
5mA ≤ I
L
≤ 500mA –4 4
ΔV
O
Output Voltage (Note 2) 20 100 ppm/°C
ΔT Temperature Coef. Output voltage > 10V 80
350
ΔV
O
Line Regulation V
IN
= V
OUT
+ 1V to 26V 0.03 0.10 %
V
O
0.40
ΔV
O
Load Regulation I
L
= 5 to 500mA 0.04 0.16 %
V
O
(Note 3) 0.30
V
IN
– V
O
Dropout Voltage I
L
= 5mA 80 150 mV
(Note 4) 180
I
L
= 100mA 200
Output voltage > 10V 240
I
L
= 500mA 300
Output voltage > 10V 420
I
L
= 750mA 370 600
750
I
GND
Ground Pin Current I
L
= 5mA 160 250 µA
(
Note 5) 300
I
L
= 100mA 1 2.5 mA
3
I
L
= 500mA 8 13
16
I
L
= 750mA 15 25
I
GNDDO
Ground Pin V
IN
= 0.5V less than designed V
OUT
200 500 µA
Current at Dropout (V
OUT
≥ 3.3V)
(
Note 5) I
O
= 5mA
I
LIMIT
Current Limit V
OUT
= 0V 1.1 1.5 A
(
Note 6) 2
ΔV
O
Thermal Regulation (Note 7) 0.05 0.2 %/W
ΔP
D
e
n
Output Noise C
L
= 10µF 400 µV RMS
Voltage
(10Hz to 100kHz) C
L
= 100µF 260
I
L
= 100mA
Absolute Maximum Ratings
Power Dissipation (Note 1)...............................................Internally Limited
Lead Temperature (Soldering, 5 seconds).........................................260°C
Storage Temperature Range.............................................–65°C to +150°C
Operating Junction Temperature Range ..........................–40°C to +125°C
TO-220
θ
JC
.....................................................................................2.5°C/W
TO-263
θ
JC
.....................................................................................2.5°C/W
Input Supply Voltage..............................................................–20V to +60V
Operating Input Supply Voltage..................................................2V
†
to 26V
Adjust Input Voltage (Notes 9 and 10).................................–1.5V to +26V
Shutdown Input Voltage .......................................................–0.3V to +30V
Error Comparator Output Voltage.........................................–0.3V to +30V
†
Across the full operating temperature, the minimum input voltage range for
full output current is 4.3V to 26V. Output will remain in-regulation at lower
output voltages and low current loads down to an input of 2V at 25°C.
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