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Part # MIC29301-5.0WT
Description LDO Regulator Pos 5V 3A Automotive 5-Pin(5+Tab) TO-220
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Date Code: 0621
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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.

High-Current Low-Dropout Regulators
**See Thermal Design Section
Super βeta PNP is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 •
May 2010
General Description
The MIC29150/29300/29500/29750 are high current, high
accuracy, low-dropout voltage regulators. Using Micrel's
proprietary Super βeta PNP
process with a PNP pass
element, these regulators feature 350mV to 425mV (full
load) typical 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 negative 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-pin and 5-pin
TO-220 and surface mount TO-263 (D
Pak) packages.
The MIC29750 7.5A regulators are available in 3-pin and
5-pin TO-247 packages. The 1.5A, adjustable output
MIC29152 is available in a 5-pin power D-Pak (TO-252)
For applications with input voltage 6V or below, see
MIC37xxx LDOs.
Data sheets and support documentation can be found on
Micrel’s web site at
High current capability
MIC29750/29751/29752............................................ 7.5A
Low-dropout voltage
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
Also characterized for smaller loads with industry-
leading performance specifications
Fixed voltage and adjustable versions
Battery powered equipment
High-efficiency “Green” computer systems
Automotive electronics
High-efficiency linear lower supplies
High-efficiency lost-regulator for switching supply
Typical Application**
Fixed Output Voltage
Adjustable Output Voltage
(*See Minimum Load Current Section)
Micrel, Inc. MIC29150/29300/29500/29750
May 2010 2
Ordering Information
Part Number
Standard RoHS Compliant
Junction Temp.
Voltage Current Package
MIC29150-3.3BT MIC29150-3.3WT
–40°C to +125°C 3.3 1.5A 3-Pin TO-220
MIC29150-3.3BU MIC29150-3.3WU
–40°C to +125°C 3.3 1.5A 3-Pin TO-263
MIC29150-5.0BT MIC29150-5.0WT
–40°C to +125°C 5 1.5A 3-Pin TO-220
MIC29150-5.0BU MIC29150-5.0WU
–40°C to +125°C 5 1.5A 3-Pin TO-263
MIC29150-12BT MIC29150-12WT
–40°C to +125°C 12 1.5A 3-Pin TO-220
MIC29150-12BU MIC29150-12WU
–40°C to +125°C 12 1.5A 3-Pin TO-263
MIC29151-3.3BT MIC29151-3.3WT
–40°C to +125°C 3.3 1.5A 5-Pin TO-220
MIC29151-3.3BU MIC29151-3.3WU
–40°C to +125°C 3.3 1.5A 5-Pin TO-263
MIC29151-5.0BT MIC29151-5.0WT
–40°C to +125°C 5 1.5A 5-Pin TO-220
MIC29151-5.0BU MIC29151-5.0WU
–40°C to +125°C 5 1.5A 5-Pin TO-263
MIC29151-12BT MIC29151-12WT
–40°C to +125°C 12 1.5A 5-Pin TO-220
MIC29151-12BU MIC29151-12WU
–40°C to +125°C 12 1.5A 5-Pin TO-263
MIC29152BT MIC29152WT
–40°C to +125°C Adj. 1.5A 5-Pin TO-220
MIC29152BU MIC29152WU
–40°C to +125°C Adj. 1.5A 5-Pin TO-263
— MIC29152WD
–40°C to +125°C Adj. 1.5A 5-Pin TO-252
Contact Factory –40°C to +125°C Adj. 1.5A 5-Pin TO-220
Contact Factory –40°C to +125°C Adj. 1.5A 5-Pin TO-263
MIC29300-3.3BT MIC29300-3.3WT
–40°C to +125°C 3.3 3.0A 3-Pin TO-220
MIC29300-3.3BU MIC29300-3.3WU
–40°C to +125°C 3.3 3.0A 3-Pin TO-263
MIC29300-5.0BT MIC29300-5.0WT
–40°C to +125°C 5 3.0A 3-Pin TO-220
MIC29300-5.0BU MIC29300-5.0WU
–40°C to +125°C 5 3.0A 3-Pin TO-263
MIC29300-12BT MIC29300-12WT
–40°C to +125°C 12 3.0A 3-Pin TO-220
MIC29300-12BU MIC29300-12WU
–40°C to +125°C 12 3.0A 3-Pin TO-263
MIC29301-3.3BT MIC29301-3.3WT
–40°C to +125°C 3.3 3.0A 5-Pin TO-220
MIC29301-3.3BU MIC29301-3.3WU
–40°C to +125°C 3.3 3.0A 5-Pin TO-263
MIC29301-5.0BT MIC29301-5.0WT
–40°C to +125°C 5 3.0A 5-Pin TO-220
MIC29301-5.0BU MIC29301-5.0WU
–40°C to +125°C 5 3.0A 5-Pin TO-263
MIC29301-12BT MIC29301-12WT
–40°C to +125°C 12 3.0A 5-Pin TO-220
MIC29301-12BU MIC29301-12WU
–40°C to +125°C 12 3.0A 5-Pin TO-263
MIC29302BT MIC29302WT
–40°C to +125°C Adj. 3.0A 5-Pin TO-220
MIC29302BU MIC29302WU
–40°C to +125°C Adj. 3.0A 5-Pin TO-263
MIC29303BT MIC29303WT
–40°C to +125°C Adj. 3.0A 5-Pin TO-220
MIC29303BU MIC29303WU
–40°C to +125°C Adj. 3.0A 5-Pin TO-263
MIC29500-3.3BT MIC29500-3.3WT
–40°C to +125°C 3.3 5.0A 3-Pin TO-220
MIC29500-5.0BT MIC29500-5.0WT
–40°C to +125°C 5 5.0A 3-Pin TO-220
MIC29501-3.3BT MIC29501-3.3WT
–40°C to +125°C 3.3 5.0A 5-Pin TO-220
MIC29501-3.3BU MIC29501-3.3WU
–40°C to +125°C 3.3 5.0A 5-Pin TO-263
MIC29501-5.0BT MIC29501-5.0WT
–40°C to +125°C 5 5.0A 5-Pin TO-220
MIC29501-5.0BU MIC29501-5.0WU
–40°C to +125°C 5 5.0A 5-Pin TO-263
MIC29502BT MIC29502WT
–40°C to +125°C Adj. 5.0A 5-Pin TO-220
Micrel, Inc. MIC29150/29300/29500/29750
May 2010 3
Part Number
Standard RoHS Compliant
Junction Temp.
Voltage Current Package
MIC29502BU MIC29502WU
–40°C to +125°C Adj. 5.0A 5-Pin TO-263
MIC29503BT MIC29503WT
–40°C to +125°C Adj. 5.0A 5-Pin TO-220
MIC29503BU MIC29503WU
–40°C to +125°C Adj. 5.0A 5-Pin TO-263
MIC29750-3.3BWT Contact Factory –40°C to +125°C 3.3 7.5A 3-Pin TO-247
MIC29750-5.0BWT Contact Factory –40°C to +125°C 5 7.5A 3-Pin TO-247
MIC29751-3.3BWT Contact Factory –40°C to +125°C 3.3 7.5A 5-Pin TO-247
MIC29751-5.0BWT Contact Factory –40°C to +125°C 5 7.5A 5-Pin TO-247
–40°C to +125°C Adj. 7.5A 5-Pin TO-247
1. Junction Temperature
2. RoHS compliant with ‘high-melting solder’ exemption.
3. Special Order, Contact Factory
Pin Configuration
3-Pin TO-220 (T)
5-Pin TO-220 Fixed Voltage (T)
5-Pin TO-220 Adjustable Voltage (T)
5-Pin TO-220 Adjustable with Flag (T)
3-Pin TO-247 (WT)
5-Pin TO-247 Fixed Voltage (WT)
5-Pin TO-247 Adjustable Voltage (WT)
3-Pin TO-263 (D
Pak) (UT)