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
VOLTAGE
Adjustable
PACKAGE TYPE
8 Lead SOIC
AMS4154S
-25°C to 125°C
TEMP. RANGE
TYPICAL APPLICATION
PIN CONNECTIONS
8L SOIC
SO Package (S)
VIN
ON
OFF
BST
470n
L1
2.5V/2A
EN
LX
4.7µH
31.7K
BST
VIN
LX
GND
1
2
3
4
8 REF
7 EN
6 COMP
5
F/B
COMP
10µF
3.9K
V
REF
22µF
GND
F/B
B220
10K
Top View
4.7n
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723