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PDF AIC2863 Data sheet ( Hoja de datos )
| Número de pieza | AIC2863 | |
| Descripción | 3A 23V Synchronous PWM/PSM Step-Down Converter | |
| Fabricantes | Analog Intergrations Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AIC2863 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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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: 100mΩ and
85mΩ
<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
TYPICAL APPLICATIONS CIRCUIT
DESCRIPTION
The AIC2863 is a 3A synchronous-rectified Buck
converter with integrated low Rds(on) power
MOSFETs. The AIC2863, designed with a current-
mode control scheme, can convert wide input volt-
age to the adjustable output voltage to provide ex-
cellent 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 volt-
age regulation.
The AIC2863 is also equipped with soft start and
whole protections (under-voltage, over-voltage,
over-temperature, short circuit and current-limit) in-
to a single package.
This device, available in SOP-8 package, provides
a very compact system solution with minimal exter-
nal components and PCB area.
AIC2863
Typical Application Circuit
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
DS-2863G-04 20121218
www.analog.com.tw
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1 page  
AIC2863
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
VOUT AC
20mV/Div
VOUT AC
20mV/Div
VSW
5V/Div
VSW
5V/Div
IL
1A/Div
VIN=12V,VOUT=3.3V,IOUT=1A
Time(2μs/Div)
IL
2A/Div
VIN=12V,VOUT=3.3V,IOUT=3A
Time(2μs/Div)
Fig. 7 Stability Waveform at VOUT=3.3V, IOUT=1A
Fig. 8 Stability Waveform at VOUT=3.3V, IOUT=3A
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AIC2863.PDF ] | |
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