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AMS4154

2A OUTPUT PWM BUCK CONVERTER

Advanced Monolithic Systems Inc 

Advanced

Monolithic

Systems

FEATURES

• Stable with low ESR Output Ceramic Capacitors

• Up to 99% On time

• 2A Output Current

• Wide Operating Input Voltage Range 5.5V to 32V

• Fixed 330 kHz Frequency

• Thermal Shutdown

• Cycle-by-cycle Over Current Protection

• Under Voltage Lockout

• 5V reference output

• Adjustable output from 0.6V

AMS4154

2A OUTPUT PWM BUCK CONVERTER

RoHS compliant

APPLICATIONS

• Battery Chargers

• Portable (Notebook) Computers

• Industrial power supply

• Point of regulation for high performance electronics

• Consumer Electronics

• Audio Power Amplifiers

• Distributed Power Systems

• Pre-Regulator for Linear Regulators

• LCD TVs and LCD monitors

• 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

OUTPUT PACKAGE TYPE TEMP. RANGE

VOLTAGE 8 Lead SOIC

Adjustable AMS4154S

-25°C to 125°C

TYPICAL APPLICATION

ON

OFF

VIN

EN

BST

LX

10µF

3.9K

4.7n

COMP

VREF

GND

F/B

470n

L1

4.7µH

B 220

2.5V/2A

31.7K

22µF

10K

PIN CONNECTIONS

8L SOIC

SO Package (S)

BST 1

VIN 2

LX 3

GND 4

8 REF

7 EN

6 COMP

5 F/B

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Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723

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