AMS4154 Datasheet, PDF (1/5 Pages) Advanced Monolithic Systems – 2A OUTPUT PWM BUCK CONVERTER

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
V_REF
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
Top View
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