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 cycleby-cycle current limiting and thermal shutdown. In shutdown mode the regulator draws 17µA of supply current.

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

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