AIC2862 Datasheet, PDF (1/9 Pages) Analog Intergrations Corporation – 2A 23V Synchronous PWM/PSM Step-Down

AIC2862
2A 23V Synchronous PWM/PSM Step-Down
Converter with High Light-load Efficiency
 ^FEATURES
 2A Continuous Output Current
 Wide 4.75V to 23V Operating Input Range
 Ouput Adjustable from 0.925V to 12V
 Up to 89% Efficiency for Heavy Load
(Vin=12V, Vout=3.3V, Iout=2.0A)
 Up to 92% Efficiency for Moderate Load
(Vin=12V, Vout=3.3V, Iout=1.0A)
 Up to 81% Efficiency for Light Load
(Vin=12V, Vout=3.3V, Iout=20mA)
 Low Rds(on) Internal Switches: 140mΩ and
120mΩ
 <3µA 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 AIC2862 is a 2A synchronous-rectified Buck
converter with integrated low Rds(on) power
MOSFETs. The AIC2862, 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
AIC2862 is equipped with an automatic
PSM/PWM modeoperation. 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 AIC2862 is also equipped with softstart 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, pro-
vides a very compact system solution with mini-
mal external components and PCB area.
 ^{TYPICAL APPLICATIONS CIRCUIT}
Typical Application Circuit
Analog Integrations Corporation
Si-Soft Research Center
DS-2862G-02 20120807
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: [phone]
FAX: [phone]
www.analog.com.tw
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