AP1534 Datasheet | Diodes Incorporated

Description Pin Assignments AP1534 consists of step-down switching regulator with PWM control. These devices include a reference voltage source, oscillation circuit, error amplifier, internal PMOS. AP1534 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%. This converter also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup. An enable function, an over current protect function and a short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be reduced from 300KHz to 50KHz. Also, an internal pensation block is built in to minimize external ponent count. With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally, these ICs can function as step-down switching regulators. They serve as ideal power supply units for portable devices when coupled with the SO-8 mini-packages, providing such outstanding features as low current consumption. Since this converter can acmodate an input voltage up to 18V, it is also suitable for the operation via an AC adapter. (Top View) FB 1 8 VSS EN 2 AP1534 7 VSS OCSET 3 6 Output VCC 4 5 Output SO-8 Features Applications - Input voltage: 3.6V to 18V - Output voltage: 0.8V to VCC - Duty ratio: 0% to 99% PWM control - Oscillation frequency: 300KHz typical - Current limit, Enable function - Thermal Shutdown function - Built-in internal SW P-channel MOS - SO-8: Available in “Green” Molding pound (No Br, Sb) - Lead Free Finish/Ro HS pliant (Note 1) - PC Motherboard - LCD Monitor - Graphic Card - DVD-Video Player - Tele Equipment - ADSL Modem - Printer and other Peripheral Equipment - Microprocessor Core Supply Notes: 1. EU Directive 2002/95/EC (Ro HS). All applicable Ro HS exemptions applied. Please visit our website at http://.diodes./products/lead_free.html. Typical...