Voltage-mode Pwm Controller Corporation

The LX1684 is a monolithic, voltage- mode pulse-width Modulator controller. It is designed to implement a flexible, low cost buck (step-down) Regulator supply with a minimal of external components. The LX1684 has a synchronous driver for higher efficiency and is optimized to provide 12V to 3.3V or 12V to 2.5V regulation. It also CAN be used to convert 5V or 3.3V to voltages as low as 1.25V. Switching frequency is fixed at 175kHz for optimal cost and space. Short-circuit current limiting CAN be implemented without expensive current sense resistors. Similar to the LX1682 in function but with the positive side of the current sense Comparator brought out (CSP) to allow it to be referenced to the topside FET Current is sensed using the voltage drop across the RDS(ON) of the MOSFET this sensing is delayed for 1s to eliminate MOSFET ringing errors. Hiccup-mode fault protection reduces average power to the power elements during short-circuit conditions. Under-voltage lockout and soft-start are provided for optimal start-up performance. Pulling the soft-start pin to ground CAN disable the LX1684. By Microsemi Corporation
LX1684 's PackagesLX1684 's pdf datasheet

LX1684 Pinout, Pinouts
LX1684 pinout,Pin out
This is one package pinout of LX1684,If you need more pinouts please download LX1684's pdf datasheet.

LX1684 Application circuits
LX1684 circuits
This is one application circuit of LX1684,If you need more circuits,please download LX1684's pdf datasheet.

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