AP3435

Preliminary Datasheet 1.0MHz, 3.5A, Synchronous Step Down DC-DC Converter AP3435 General Description The AP3435 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 MOS switchers. The oscillator and timing capacitors are all built-in providing an internal switching frequency of 1MHz 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 versions ranging from 0.8V to 0.9×VIN (2.7V≤VIN≤5.5V), and is able to deliver up to 3.5A. The AP3435 is available in PSOP-8 package. Features High Efficiency Buck Power Converter Output Current: 3.5A Low RDS(ON) Internal Switches:100mΩ (VIN=5V) Adjustable Output Voltage from 0.8V to 0.9×VIN Wide Operating Voltage Range: 2.7V to 5.5V Built-in Power Switches for Synchronous Rectification with High Efficiency Feedback Voltage: 800mV 1.0MHz Constant Frequency Operation Thermal Shutdown Protection Low Drop-out Operation at 100% Duty Cycle No Schottky Diode Required Input Over Voltage Protection Applications LCD TV Set Top Box Post DC-DC Voltage Regulation PDA and Notebook Computer Dec. 2012 Rev. 1. 0 PSOP-8 Figure 1. Package Type of AP343...