Advanced Monolithic Systems, Inc. www.advanced-monolithic.com

Phone (925) 443-0722 Fax (925) 443-0723

Advanced

AMS4154

Monolithic

2A OUTPUT PWM BUCK CONVERTER

Systems

RoHS compliant

FEATURES

APPLICATIONS

• Stable with low ESR Output Ceramic Capacitors

• Battery Chargers

• Up to 99% On time

• Portable (Notebook) Computers

• 2A Output Current

• Industrial power supply

• Wide Operating Input Voltage Range 5.5V to 32V

• Point of regulation for high performance electronics

• Fixed 330 kHz Frequency

• Consumer Electronics

• Thermal Shutdown

• Audio Power Amplifiers

• Cycle-by-cycle Over Current Protection

• Distributed Power Systems

• Under Voltage Lockout

• Pre-Regulator for Linear Regulators

• 5V reference output

• LCD TVs and LCD monitors

• Adjustable output from 0.6V

• Automotive electronics

GENERAL DESCRIPTION

The AMS4154 is a step-down converter for high voltage applications. Current mode operation provides easier compensation

and fast transient response. Internal cycle-by-cycle current limiting and thermal shutdown provides the necessary protection in

faults situation. A 5V reference voltage is available that can supply up to 2mA current.

ORDERING INFORMATION

TYPICAL APPLICATION

PIN CONNECTIONS

OUTPUT

PACKAGE TYPE

TEMP. RANGE

VOLTAGE

8 Lead SOIC

Adjustable

AMS4154S

-25°C to 125°C

8L SOIC

SO Package (S)

EN

COMP

F/B

BST

VIN

LX

GND

1

2

8

4

3

7

5

6

REF

Top View

COMP

GND

F/B

LX

BST

EN

VIN

ON

OFF

10µF

470n

L1

4.7µH

31.7K

B220

10K

22µF

2.5V/2A

4.7n

3.9K