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