AIC2309
1A Dual Synchronous PWM Step-down DC/DC Converter
- FEATURES
-
- Dual 1A Output
- 2.5V to 5.5V Input Range
- Accurate Reference 0.6V Provides Low Output Voltages
- Adjustable Output Voltage
- Up to 95% Efficiency
- Stable with Low ESR Output Ceramic Capacitors
- No Schottky Diode Required.
- 65uA Quiescent Current per Channel.
- 100% Duty Cycle in Low Dropout Operation.
- 1.5MHz Fixed-Frequency PWM Operation
- APPLICATIONS
-
- Digital Still Cameras
- Cellular Phones
- Wireless and DSL Modems
- Notebook Chipset Supplies.
- PDAs and Handy-Terminals
- Battery-Operated Devices (1 Li-Ion or 3 NiMH/ NiCd).
- DESCRIPTION
- The AIC2309 is a dual output, low-noise, pulse-width-modulated (PWM), DC-DC stepdown converter. It powers logic and transmitters in small wireless systems such as cellular phones, communicating PDAs, and handy-terminals.
The device features an internal synchronous rectifier for high efficiency; it requires no external Schottky diode. Internally fixedfrequency 1.5MHz operation provides easy post-filtering and allows the use of small inductors and capacitors. Shutdown mode places the device in standby, reducing supply current to under 1μA..
Other features of the AIC2309 include high efficiency, soft start, over temperature protection, and over current protection. It is available in a space-saving DFN-12 (3x3).
- TYPICAL APPLICATION
