AP1530

• Product Introduction

AP1530The buck switch regulates PWM control

description The AP1530 includes a buck switch to regulate PWM control. These devices include a reference voltage source, oscillation circuitry, error amplifier, and internal PMOS. The AP1530 provides a low-ripple power supply, high efficiency, and excellent transient characteristics. The PWM control circuit is capable of changing the duty cycle linearity from 0 to 100%. The converter also contains an error amplifier circuit. Enabling functions, overcurrent protection and short circuit protection are built inside, and when OCP or SCP occurs, the operating frequency will be reduced from 300kHz to 50kHz. In addition, the internal compensation block is built with a minimum number of external components. With internal P-channel power MOS, coils, capacitors and external diodes, these chips can also be used as buck switching regulators. They offer outstanding features such as low current consumption when packaged as SO-8 and Su-8DEP (dual exposed pads) as power supply units for portable devices. Since the converter can accommodate input voltages up to 18V, it is also suitable for operation via an AC adapter. Features and Benefits: • Input voltage: 3.6V to 18V. • Output voltage: 0.8V to V CC • Duty cycle: 0% to 100% PWM control • Oscillation frequency: 300kHz typical. • Current limit, enable function • Thermal shutdown function • P-channel MOS with built-in internal switch • Lead-free package: SO-8 • SO-8 and SO-8DEP: "green" molded compound (bromine-free, antimony-free) • Lead-free finish/RoHS compliant apply • Spring motherboards • LCD displays • Graphics cards • DVD video players • Telecommunications equipment • ADSL modems • Printers and other peripherals • Microprocessor core power supply • Network power supply