General Description

The MIC29302 is a high-current, low-cost, low-dropout

voltage regulator which 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 voltage

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 MIC29302 has an adjustable output which can be

set by two external resistors to a voltage between 1.24V to

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

current faults, reversed input polarity, reversed lead

insertion, and overtemperature operation. A TTL logic

enable (EN) pin is available in the MIC29302 to

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

set to continuous operation by connecting EN to the input

(IN). The MIC29302 is available in the standard and 5-pin

TO-263 and TO-220 packages with an operating junction

temperature range of −40°C to +85°C.

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: TO263-5 and TO220-5

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 lost-regulator for switching supply