AIC2354 Datasheet, PDF (1/13 Pages) Analog Intergrations Corporation – 1A Synchronous PWM/PSM Step-Down

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 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 AIC2354 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, 1.5V,
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 pulse-
skipping-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-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C
TEL:
886-3-5772500
FAX: [phone]
www.analog.com.tw
1