AiT Semiconductor Inc.

www.ait-ic.com

A7596

DC-DC CONVERTER/ BUCK (STEP-DOWN)

150KHz, 3A PWM BUCK DC-DC CONVERTER

REV1.2

- MAY 2009 RELEASED, MAR 2015 UPDATE -

- 1 -

DESCRIPTION

FEATURES

The A7596 series of regulators are monolithic

integrated circuits that provide all the active functions

for a step-down (buck) switching regulator, capable of

driving a 3A load with excellent line and load

regulation. These devices are available in fixed output

voltage of 5V and adjustable output version.

The A7596 operates at a switching frequency of

150KHz thus allowing smaller sized filter components

than what would be needed with lower frequency

switching regulators.

Other features include a guaranteed ±3% tolerance

on output voltage under specified input voltage and

output load conditions, and ±15% on the oscillator

frequency. External shutdown is included, featuring

typically 100μA standby current.

The A7596 is available in TO-263-5 package.

ORDERING INFORMATION

Package Type

Part Number

TO-263-5

S5

A7596S5R-XXX

A7596S5VR-XXX

A7596S5U-XXX

A7596S5VU-XXX

Note

XXX: Output Voltage

050=5.0V; ADJ=Adjustable

U = Tube

R: Tape & Reel

V: Halogen free Package

AiT provides all RoHS products

Suffix “ V “ means Halogen free Package



5V and adjustable output versions



Adjustable version output voltage range 1.23V

to 37V



Input voltage range up to 40V



Guaranteed 3A output current



150KHz fixed frequency internal oscillator



Built-in thermal shutdown and current limit

protection



Available in TO-263-5 Package

APPLICATION



Fixed voltage power supply for LCD monitor

and LCD TV



On-Card switching regulation



Simple high efficiency Step-down regulator

TYPICAL APPLICATION

L1 = 33μH

Figure 1 Adjustable Output Voltage

Aluminum Electrolytic; D1 = Schottky, 5A/40V; L1 = 33μH

Figure 2 Fixed Voltage Regulator: