General Description

The AP2004 integrates Pulse-Width-Modulation (PWM) control circuit into a single chip, mainly designs for power-supply regulator. All the functions include an on-chip 1.25V reference output, an error amplifier, an adjustable oscillator, a soft-start, UVLO, SCP circuitry, and a push-pull output circuit. Switching frequency is adjustable by trimming CT. During low VCC situation, the UVLO makes sure that the outputs are off until the internal circuit operates normally.

Features

- PWM Buck Control Circuitry

- Operating voltage can be up to 27V

- Under voltage Lockout (UVLO) Protection

- Short Circuit Protection (SCP)

- Soft-start circuit

- Variable Oscillator Frequency -- 300Khz Max

- 1.25V voltage reference Output

- 8-pin PDIP and SOP packages

Applications

- Backlight inverter

- LCD Monitor

- XDROM, XDSL Product

- DC/DC converters in computers, etc.