AMS4155 Datasheet, PDF (1/6 Pages) Advanced Monolithic Systems – 2A OUTPUT PWM BUCK CONVERTER

Advanced
Monolithic
Systems
FEATURES
• Stable with low ESR Output Ceramic Capacitors
• Up to 95% Efficiency
• 2A Continuous Output Current
• Wide 4.75V to 20V Operating Input Range
• Fixed 480kHz Frequency
• Thermal Shutdown
• Cycle-by-cycle + hiccup Over Current Protection
• Under Voltage Lockout
• Frequency Synchronization Input
• Operating Temperature: -40°C to 125°C
• Available in an 8-Pin SO Package
AMS4155
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
GENERAL DESCRIPTION
The AMS4155 is a monolithic step down switch mode converter with a built in internal power Switch Transistor. It achieves 2A
continuous output current over a wide input supply range with excellent load and line regulation.
Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-
by-cycle current limiting and thermal shutdown. In shutdown mode the regulator draws 17µA of supply current.
ORDERING INFORMATION
OUTPUT PACKAGE TYPE TEMP. RANGE
VOLTAGE 8 Lead SOIC
Adjustable AMS4155S
-25°C to 125°C
TYPICAL APPLICATION
PIN CONNECTIONS
INPUT
470µF/
10µF CER
ON _EN
OFF
VIN
BST
3
2
8
AMS4155
1µF
LX
4
SYNC ₁
5
GND
7
COMP
6 ^F/B
10nF
10 µH
B230A
5kΩ
OUTPUT
5V/3A
30kΩ
40µF
ceramic
10kΩ
8L SOIC
SO Package (S)
SYNC 1
BST ₂
VIN ₃
LX 4
8 _EN
7 COMP
6 FB
5 GND
Top View
Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone [phone] Fax [phone]