AIC2354

AIC2354 1A Synchronous PWM/PSM Step-Down DC/DC Converter  FEATURES  2.5V to 5.5V Input Voltage Range  1.0A Guaranteed Output Current  Up to 95% Efficiency  Low RDS(ON) Internal Switche: 280mΩ  No Schottky Diode Required  100% Duty Cycle in Low Dropout Operation  Operating Frequency: 1.5MHz  Accurate Reference 0.6V Provides Low Output Voltages  APPLICATIONS  LCD TV  Multi-function Peripheral  Cellular Phones  CPU I/O Supplies  Cordless Phones  PDAs and Handy-Terminals  Battery-Operated Devices (1 Li-Ion or 3 NiMH/ NiCd)  APPLICATIONS CIRCUIT  DESCRIPTION The AIC2354 is a low-noise, pulse-widthmodulated (PWM), DC-DC step-down converter. The device is available in an adjustable version and fixed output voltages of 1.0V, 1.2V, 1.5V, 1.8V, and 3.3V. The device features an internal synchronous rectifier for high efficiency; it requires no external Schottky diode. The AIC2354 is ideally suited for Li-Ion battery applications. PWM/PSM mode extends battery life by switching to a pulseskipping-modulated mode during light loads. Shutdown mode places the device in standby, reducing supply current to under 1µA. Other features of the AIC2354 include high efficiency, low dropout voltage, short circuit protection, over temperature protection, and over voltage protection. It is available in a small 5 pins SOT-23 and a 6 pins DFN package. Fig. 1 Fixed Step-Down DC/DC Converter Analog Integrations Corporation Si-Soft Research Center DS-2354G-02 20111101 3A1, No.1, Li-H...