General Description

The APW7068 integrates synchronous buck PWM, linear controller, and 0.8V Reference Out Voltage, as well as the monitoring and protection functions into a single package. The fixed 300KHz switching frequency synchronous PWM controller drives dual N-channel MOSFETs, which provides one controlled power output with over-voltage and over-current protections. Linear controller drives an external N-channel MOSFET with under-voltage protection.

Features

• Two Regulated Voltages and REF_OUT

- Synchronous Buck Converter

- Linear Regulator

- REF_OUT = 0.8V±1 with 3mA source current

• Single 12V Power Supply Required

• Excellent Both Output Voltage Regulation

- 0.8V Internal Reference

- ±1 Over Line Voltage and Temperature

• Integrated Soft-Start for PWM and Linear Outputs

• 300KHz Fixed Switching Frequency

• Voltage Mode PWM Control Design and Up to 89(Typ.) Duty Cycle

• Under-Voltage Protection Monitoring Linear Output

• Over-Voltage Protection Monitoring PWM Output

• Over-Current Protection for PWM Output

- Sense Low-side MOSFET’s RDS(ON)

• SOP-14, QSOP-16 and QFN-16 packages

• Lead Free Available (RoHS Compliant)

Applications

• Graphic Cards