MIC29302A View Datasheet(PDF) - Micrel

Part Name

Description

Manufacturer

MIC29302A

3A Fast-Response LDO Regulator

Micrel 

MIC29302A

3A Fast-Response LDO Regulator

General Description

The MIC29302A is a high-current, low-cost, low-dropout

voltage regulator that uses Micrel's proprietary Super βeta

PNP® process with a PNP pass element. The 3A LDO

regulator features 450mV (full load) dropout voltage and

very low ground current. Designed for high-current loads,

these devices also find applications in lower current, low-

dropout critical systems, where their dropout voltages and

ground current values are important attributes.

Along with a total accuracy of ±2% (over temperature, line,

and load regulation) the regulator features very fast

transient recovery from input voltage surges and output

load current changes.

The MIC29302A has an adjustable output that can be set

by two external resistors to a voltage between 1.24V and

15V. In addition, the device is fully protected against

overcurrent faults, reversed input polarity, reversed lead

insertion, and overtemperature operation. A TTL logic

enable (EN) pin is available in the MIC29302A to

shutdown the regulator. When not used, the device can be

set to continuous operation by connecting EN to the input

(IN). The MIC29302A is available in the standard and 5-pin

TO-263 and TO-252 packages with an operating junction

temperature range of −40°C to +125°C.

Datasheets and support documentation can be found on

Micrel’s website at: www.micrel.com.

Features

• High-current capability

− 3A over full temperature range

• Low-dropout voltage of 450mV at full load

• Low ground current

• Accurate 1% guaranteed tolerance

• Extremely fast transient response

• Zero-current shutdown mode

• Error flag signals output out-of-regulation

• Adjustable output voltage

• Packages: TO-263-5L and TO-252-5L

Applications

• Processor peripheral and I/O supplies

• High-efficiency “green” computer systems

• Automotive electronics

• High-efficiency linear lower supplies

• Battery-powered equipment

• PC add-in cards

• High-efficiency post-regulator for switching supply

_________________________________________________________________________________________________________________________

Typical Application

VOUT

= 1.242 ×  R1 + 1

 R2 

Dropout Voltage

vs. Output Current

500

400 VIN = 3.3V

VADJ = 0V

300

TA = 25ºC

200

100

0

0.0

0.5

1.0

1.5

2.0

2.5

3.0

OUTPUT CURRENT (A)

Super ßeta 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 • http://www.micrel.com

October 3, 2014

Revision 2.0

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