UNISONIC TECHNOLOGIES CO.
, LTD UC3655
500mA SYNCHRONOUS STEP-DOWN DC/DC CONVERTERS
DESCRIPTION
The UTC UC3655 is a synchronous-rectification type DC/DC converters with a built-in 0.
6Ω P-channel driver
transistor and 0.
7Ω N-channel switching
transistor, which designed to allow the use of ceramic capacitors.
Using only a coil and two capacitors connected externally, the UC3655 enable a high efficiency, stable power supply with an output current of 500mA to be configured.
Its operating voltage is 2.
0V and the output voltage is programmable in a range from 0.
9V to 4.
0V in increments of 0.
1V (accuracy: ±2.
0%) internally.
The oscillation frequency is 1.
3MHz.
For operation mode, it is PWM contr...