AIC2863
3A 23V Synchronous PWM/PSM Step-Down Converter with High Light-load Efficiency
- FEATURES
-
- 3A Continuous Output Current
- Wide 4.75V to 23V Operating Input Range
- Ouput Adjustable from 0.925V to 12V (VREF=0.925V Version)
- Ouput Adjustable from 0.8V to 12V (VREF=0.8V Version)
- Up to 84% Efficiency for Heavy Load (Vin=12V, Vout=3.3V, Iout=3.0A)
- Up to 91% Efficiency for Moderate Load (Vin=12V, Vout=3.3V, Iout=1.0A)
- Low Rds(on) Internal Switches: 100mohm and 85mohm
- <3uA Supply Current in Shutdown Mode
- 340KHz/550KHz Frequency
- Programmable Soft Start
- Thermal Shutdown
- Cycle by Cycle Over Current Protection
- Under Voltage Lockout
- Short Circuit Protection
- Over Voltage Protection
- APPLICATIONS
-
- Networking Systems such as Modems & Routers
- Distributed Power Systems
- Pre-Regulator for Linear Regulators
- Set-top Box
- DESCRIPTION
- The AIC2863 is a 3A synchronous-rectified Buck converter with integrated low Rds(on) power MOSFETs. The AIC2863, designed with a cur-rent-mode control scheme, can convert wide in-put voltage to the adjustable output voltage to provide excellent output voltage regulation. It is stable with low ESR output ceramic capacitors.
For high efficiency over all load current range, the AIC2863 is equipped with an automatic PSM/PWM mode operation. At light load, the IC operates in the PSM (Pulse Skipping Mode) to reduce switching losses. At heavy load, the IC works in PWM mode to provide high efficiency and excellent output voltage regulation.
The AIC2863 is also equipped with soft start and whole protections (under-voltage, over-voltage, over-temperature, short circuit and current-limit) into a single package.
This device, available in SOP-8 package, provides a very compact system solution with mini-mal external components and PCB area.
- TYPICAL APPLICATION
