AP3422 Datasheet | BCD Semiconductor

Preliminary Datasheet Dual 1.1MHz, 800m A Synchronous DC-DC Buck Converter General Description The AP3422 contains two independent 1.1MHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converters, each of them is capable of driving a 800m A load with high efficiency, excellent line and load regulation. Each converter integrates a main switch and a synchronous switch without an external Schottky diode. It is ideal for powering portable equipment that runs from a single Li-ion battery. A standard series of inductors are available from several different manufacturers optimized for use with the AP3422. This feature greatly simplifies the design of switch-mode power supplies. This IC is available in DFN-3×3-10 package. Features - High Efficiency: up to 95% - Output Current on Each Channel: 800m A - Input Voltage Range: 2.5V to 5.5V - Fixed 1.1MHz Frequency - 100% Duty Cycle in Dropout - Built-in Short Circuit Protection - Built-in Thermal Shutdown Function - Built-in Current Limit Function - Shutdown Current: <1µA Applications - GPS - Wi Fi Card - Portable Media Player - Digital Still and Video Cameras Feb. 2013 Rev. 1. 2 DFN-3×3-10 Figure 1. Package Type of AP3422 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet Dual 1.1MHz, 800m A Synchronous DC-DC Buck Converter Pin Configuration DN Package (DFN-3×3-10) Pin 1...