AIC2309 Datasheet, PDF (1/10 Pages) Analog Intergrations Corporation – 1A Dual Synchronous Step-down DC/DC Converter

AIC2309
1A Dual Synchronous Step-down DC/DC Converter
 ^FEATURES
 Dual 1A Output
 2.5V to 5.5V Input Range
 Accurate Reference 0.6V Provides Low Out-
put Voltages
 Adjustable Output Voltage
 Up to 95% Efficiency
 Stable with Low ESR Output Ceramic Ca-
pacitors
 No Schottky Diode Required.
 65µA 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 step-
down converter. It powers logic and transmit-
ters in small wireless systems such as cellu-
lar phones, communicating PDAs, and
handy-terminals.
The device features an internal synchronous
rectifier for high efficiency; it requires no ex-
ternal Schottky diode. Internally fixed-
frequency 1.5MHz operation provides easy
post-filtering and allows the use of small in-
ductors and capacitors. Shutdown mode
places the device in standby, reducing sup-
ply current to under 1µA..
Other features of the AIC2309 include high
efficiency, soft start, over temperature pro-
tection, and over current protection. It is
available in a space-saving 12-pin DFN.
 ^{TYPICAL APPLICATIONS CIRCUIT}
Fig. 1 Adjustable Output Voltage Step-Down DC/DC Converter
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: [phone]
FAX: [phone]
DS-2309G-01 20121008
www.analog.com.tw
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