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发布者:来自网络 发布时间:2010/1/2 阅读:7987次    关键字: AX5202
AX5202-Step-up PWM DC/DC Converter


AX5202-Step-up PWM DC/DC Converter DataSheet

GENERAL DESCRIPTION
    The AX5202 is high efficient step-up DC/DC converter. Large output current is possible having a built in internal N channel MOSFET, and using an external coil and diode.
    The AX5202 can be operated at switching frequencies of 500 kHz allowing for easy filtering and low noise, the size of the external components can be reduced. Output voltage is programmable with 1.0V of standard voltage supply internal, and using externally connected components, output voltage (FB) can be set up at will. The soft-start time can be programmed by outside capacitor; the function prevents overshoot at startup. Build inside Current limit, Thermal Shutdown and enable functions.

FEATURES
- Input voltage:3V to 16V
- Output voltage:3.3V to 23V
- Duty ratio:0% to 85% PWM control
- Oscillation frequency:500KHz.
- Enable and Thermal Shutdown function.
- Internal Current limit.
- Built-in N-channel MOSFET
- SOP-8L with Exposed pad Pb-Free package.

P/N Package Features Vin Isw Vout Frequency Stanby 5-12(1A) 3.3-5(1A)
Data Sheet
Step-up Simple Switch Current Efficiency(%) Efficiency(%)  
AX5201 SOP8/EP b,c,f,e,m 3.0~20V 3A 25V(Vfb=1V) 500K 1uA 92% 91%
AX5203 SOP8/EP b,c,f,e,m 4.0V~23V 3A 32V(Vfb=1V) 500K 1uA 92% 91%
AX5204 SOP8/EP b,c,f,e,m 3.0V~20V 2A 68V(Vfb=1V) 500K 1uA 92% 91%
AX5104 SOP8/EP b,c,f,e,m,h,k 4.0~23V 1.6A 25V(Vfb=1V) 800K 1uA 80%(0.3A) 91%
a:External Synchronization b:Internal switch c:Enable Pin d:Synchronous e:Switch current limit f: Thermal Shutdown g:Power saving mode h:Voltage Reference i:External Compensation j:External current limit setting m:External soft-start

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