AIC2304 Datasheet, PDF (1/14 Pages) Analog Intergrations Corporation – 1A Synchronous PWM Step-Down

AIC2304
1A Synchronous PWM Step-Down
DC/DC Converter
 ^FEATURES
 2.5V to 5.5V Input Voltage Range
 1.0A Guaranteed Output Current
 Up to 95% Efficiency
 Low R_DS(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 AIC2304 is a low-noise, pulse-width-
modulated (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. Shutdown
mode places the device in standby, reducing
supply current to under 1µA. Other features of
the AIC2304 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
1