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AP1539 - 18V 4A 300KHz BUCK CONVERTER

General Description

Input voltage: 3.6V to 18V Output voltage: 0.8V to VCC Output current: up to 4A Duty ratio: 0% to 99% PWM control

Oscillation frequency: 300KHz typ.

Soft-start like, Current limit and Enable function Thermal Shutdown function

Key Features

  • General.

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AP1539 18V 4A 300KHz BUCK CONVERTER Features General Description • Input voltage: 3.6V to 18V • Output voltage: 0.8V to VCC • Output current: up to 4A • 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-DEP: Available in “Green” Molding Compound (No Br, Sb) • Lead Free Finish / RoHS Compliant (Note 1) AP1539 consists of step-down switching regulator with PWM control. These devices include a reference voltage source, oscillation circuit, error amplifier, internal PMOS. AP1539 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to vary the duty ratio linearly from 0 up to 99%.