AP3410B

Preliminary Datasheet 1.5MHz Synchronous Step-down DC-DC Converter AP3410B General Description The AP3410B is a high efficiency step-down DC-DC voltage converter. The chip operation is optimized by peak-current mode architecture with built-in synchronous power MOSFET switchers. The oscillator and timing capacitors are all built-in providing an internal switching frequency of 1.5MHz that allows the use of small surface mount inductors and capacitors for portable product implementations. Integrated Soft Start (SS), Under Voltage Lock Out (UVLO), Thermal Shutdown Detection (TSD) and Short Circuit Protection are designed to provide reliable product applications. The device is available in adjustable output voltage version ranging from 0.6V to 0.9×VIN when input voltage range is from 2.5V to 5.5V, and is able to deliver up to 1.2A. The AP3410B is available in SOT-23-5 package. Features High Efficiency Buck Power Converter Wide Input Voltage Range: 2.5V to 5.5V Adjustable Output Voltage: 0.6V to 0.9×VIN Low RDS(ON) Internal Switches:200mΩ (VIN=5V) Built-in Power Switches for Synchronous Rectification with High Efficiency Output Current: 1.2A Feedback Voltage: 600mV 1.5MHz Constant Frequency Operation Thermal Shutdown Protection Low Dropout Operation at 100% Duty Cycle No Schottky Diode Required Input Over Voltage Protection Output Over Voltage Protection Over Current Protection Applications Post DC-DC Voltage Regulation PDA and Notebook Computer ...