Features

3.3V, 5V, 12V, 15V and adjustable
output versions

Adjustable version output voltage
range, 1.23V to 30V ±4% max over
line and load conditions

Guaranteed 3A output current

Input voltage up to 45V

Requires only 4 external components

52KHz fixed frequency internal
oscillator

TTL shutdown capability, low power
standby mode

High efficiency

Thermal shutdown and current limit
protection
Applications

Simple high-efficiency step-down
(buck) regulator

Efficient pre-regulator for linear
regulators

Positive to negative converter
(BucK-Boost)
General Description
The AE2576 series of regulators are
monolithic integrated circuits that provide
all the active functions for a step-down
(buck) switching regulator, capable of
driving 3A load with excellent line and load
regulation. These devices are available in
fixed output voltages of 3.3V, 5V, 12V,
15V, and an adjustable output version.
Requiring a minimum number of external
components, these regulators are simple
to use and include internal frequency
compensation and a fixed frequency
oscillator.
A standard series of inductors optimized
for use with the AE2576 are available from
several different manufacturers. This
feature greatly simplifies the design of
switch-mode power supplies.
Others features include a guaranteed ±4%
tolerance on output voltage within
specified input voltages and output load
conditions, and ±10% on the oscillator
frequency. External shutdown in included,
featuring 50µA (typical) standby current.
The output switch includes cycle-by-cycle
current limiting, as well as thermal
shutdown for full protection under fault
conditions.