PWM/VFM Step-Down DC/DC Controller

The PT1101 Series are CMOS-based PWM Step-down DC/DC Controllers with low supply current. A low ripple, high efficiency Step-down DC/DC converter CAN be easily composed of with additional several external components such as a power-transistor, an inductor, a Diode and capacitors. Output voltage is fixed or CAN be adjusted with external resisters. (PWM/VFM alternative circuit is disabled in adjustable types) The PT1101 Series consist of a PWM control circuit, a high precision band-gap voltage reference, a soft-start circuit, a protection circuit, a PWM/VFM alternative circuit, an Oscillator an error Amplifier with internal compensation network and input/output voltage detection circuits. By China Resources Powtech (Shanghai) Co., Ltd
PT1101 's PackagesPT1101 's pdf datasheet



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PT1101 Application circuits
PT1101 circuits
This is one application circuit of PT1101,If you need more circuits,please download PT1101's pdf datasheet.


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