■ GENERAL DESCRIPTION

The AIC2511 series are step-down monolithic PWM converters for delivering 3A at fixed voltages of 3.3V, 5.0V, 12V and using an external divider to adjust output voltage from 1.25V to 24V with excellent line and load regulation.

Switching frequency up to 150KHz is achievable thus allowing smaller-sized filter components. Internal current limit and thermal shutdown circuits provide protection from overloads. The internal precise reference combined with voltage feedback loop provides optimum output voltage accuracy and fast load transient response.

■ FEATURES

• Operating Input Voltage From 4.5V to 24V

• 3.3V, 5V, 12V and Adjustable Output Version

• Adjustable Version Output Voltage Range,

1.25V to 24V ± 4 max Over Line and Load

Regulation

• Available in TO-263-5, TO-220-5, TO-220B

and TO-252-5 Package

• Requires Only 4 External Components.

• 150KHz Fixed Constant Frequency

• Low Power Standby Mode, IQ Typically 80µA

• TTL Shutdown Capability.

• Current Limit and Thermal Shutdown

Protection.

• 3A Guaranteed Output Load Current

■ APPLICATIONS

• Fixed Voltage power supply for LCD Monitor

and LCD TV

• On-Card Switching regulators

• Simple High Efficiency Step-down regulator