General Description

The APW7143 is a 3A asynchronous Buck converter with an integrated 70mW P-channel power MOSFET. The APW7143, designed with a current-mode control scheme, can convert wide input voltage of 4.3V to 14V to the output voltage adjustable from 0.8V to VIN to provide excellent output voltage regulation.

Features

• Wide Input Voltage from 4.3V to 14V

• Output Current up to 3A

• Adjustable Output Voltage from 0.8V to VIN

- ±2 System Accuracy

• 70mW Integrated Power MOSFET

• High Efficiency up to 92

- Automatic Skip/PWM Mode Operation

• Current-Mode Operation

- Easy Feedback Compensation

- Stable with Low ESR Output Capacitors

- Fast Load/Line Transient Response

• Power-On-Reset Monitoring

• Fixed 500kHz Switching Frequency in PWM mode

• Built-in Digital Soft-Start

• Current-Limit Protection with FrequencyFoldback

• Hiccup-Mode 50 Undervoltage Protection

• Over-Temperature Protection

• <3mA Quiescent Current in Shutdown Mode

• Small SOP-8 Package

• Lead Free and Green Devices Available (RoHS Compliant)

Applications

• OLPC, UMPC

• Notebook Computer

• Handheld Portable Device

• Step-down Converters Requiring High Efficiency and 3A Output Current