PWM ICs

Part No.	W83321G
Datasheet	W83321G.pdf
Description	The W83321G is a high-speed, N-Channel synchronous buck regulator controller. The W83321G employs fixed-frequency voltage-mode PWM control architecture. Both high-side and low-side MOSFETs are lower cost N-Channel type. The regulator is biased from a 5V rail and the power for the high-side MOSFET can be supplied by a separate 12V rail or supplied from a local charge pump. Current limit is achieved by monitoring the voltage drop across the on resistance of the low-side MOSFET. This method eliminates the requirement of extra current sensing resistor and avoids false trigger of OC protection when VIN varies. The adaptive non-overlapping MOSFET gate drivers help avoid potential shoot-through problems while maintaining high efficiency.
Features	Operates from +5V Input 0.8V to VIN Output Range Drives N-Channel MOSFETs Simple Single-Loop Control Design Voltage-Mode PWM Control Fast Transient Response Lossless, Programmable Over-current Protection 250 kHz Fixed Frequency Oscillator Internal Soft Start
Diagram	N/A
Package	SOP 8
Other Files	N/A
Development Tools	N/A
Others	N/A