AP3417A

Data Sheet 1A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3417A General Description The AP3417A is a 1.4MHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 1A load with high efficiency, excellent line and load regulation. The device integrates synchronous P-channel and N-channel power MOSFET switches with low on-resistance. 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 AP3417A. This feature greatly simplifies the design of switch-mode power supplies. The AP3417A is available in SOT-23-5 package. Features Input Voltage Range: 2.5V to 5.5V Output Voltage: 0.6V to VIN ADJ Output Fixed 1.4MHz Frequency High Efficiency up to 95% Output Current: 1A Current Mode Control 100% Duty Cycle in Dropout Built-in Over Current Protection Built-in Short Circuit Protection Built-in Thermal Shutdown Protection Built-in UVLO Function Built-in Soft-start Applications Set-top Box Datacom Portable Device Smart Phone Aug. 2012 Rev. 1. 2 SOT-23-5 Figure 1. Package Type of AP3417A BCD Semiconductor Manufacturing Limited 1 Data Sheet 1A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3417A Pin Configuration K Package (SOT-23-5) EN 1 GND 2 SW 3 5 FB 4 VIN Figure 2. Pin Configuration of AP3417A (Top View) Pin Description Pin Number 1 2 3...