AIC3413

AIC3413 400mA, 1.2MHz Synchronous Step-Up Converter  FEATURES  DESCRIPTION  VIN Start Up Voltage: 0.9V  Output Voltage Range: from 2.7V to 5.25V.  Up to 94% Efficiency  1.2MHz Fixed Frequency Switching  Built-in current mode compensation  Built-in Protection: Over Current, Over Voltage, Over Temperature  Optional Automatic PWM/PSM Version (AIC3413) and Forced PWM Version (AIC3413A).  Logic Controlled Shutdown: < 1μA  Output Disconnect by Shutdown Function  Built-in Soft Start  Active Anti-ringing Control  Small SOT-23-6 Package  APPLICATIONS  Single/Dual Cells Ni-Cd/Ni-Mh/Li-Lon Type Battery Operated Products  Wireless Mice  PDA  Digital Still Cameras  Portable Equipment The AIC3413 is a synchronous step-up DC/DC converter. There are two options for AIC3413: automatic PWM/PSM version (AIC3413), and forced PWM version (AIC3413A). The automatic PWM/PSM version enters PSM from PWM automatically when load decreases. The goal is to improve efficiency and reduce quiescent current; the forced PWM version keeps the same operating frequency even when it operates in light load. This guarantees low output ripple and noise. The AIC3413 provides a complete power supply solution for products powered by one or two Alkaline, Ni-Cd, Ni-MH or Li-Lon battery cells. It stays in operation with supply voltages down to 0.5V. The implemented boost converter uses an internal synchronous rectifier to obtain maximum efficiency. A low-EMI mode is implemented to reduce ringing an...