AIC2352
700mA Synchronous PWM/PSM Step-Down DC/DC Converter
FEATURES
2.5V to 5.5V Input Voltage Range 700mA Guara...
AIC2352
700mA Synchronous PWM/PSM Step-Down DC/DC Converter
FEATURES
2.5V to 5.5V Input
Voltage Range 700mA 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 AIC2352 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, 1.8V, and 3.3V. The device features an internal synchronous rectifier for high efficiency; it requires no external Schottky diode. The AIC2352 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 AIC2352 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 package.
Fig. 1 Fixed Step-Down DC/DC Converter
Analog Integrations Corporation
Si-Soft Research Center
DS-2352G-01 20110118
3A1, No.1, Li-Hsin Rd. I , Science...