General Description

AP1533 consists of step-down switching regulator with PWM control. These devices include a reference voltage source, oscillation circuit, error amplifier, internal PMOS.

Features

• Input voltage: 4V to 23V

• Output voltage: 0.8V to VCC

• Output current: 1.8A up to peak 2A

• Duty ratio: 0 to 99 PWM control

• Oscillation frequency: 300KHz typ.

• Soft-start like, Current limit and Enable function

• Thermal Shutdown function

• Built-in internal SW P-channel MOS

• SOP-8L: Available in “Green” Molding Compound(No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

Applications

•PC Motherboard

•LCD Monitor

•Graphic Card

•DVD-Video Player

•Telecom Equipment

•ADSL Modem

• Printer and other Peripheral Equipment

•Microprocessor core supply