General Description

The APW7145 is a 3A synchronous-rectified Buck converter with integrated 55mW power MOSFETs. The APW7145, 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.

特性 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

· 55mW Integrated Power MOSFETs

· High Efficiency up to 95

- 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 and Soft-Stop

· Current-Limit Protection with FrequencyFoldback

· 123 Over-Voltage Protection

· Hiccup-Mode 50 Under-Voltage Protection

· Over-Temperature Protection

· <3mA Quiescent Current in Shutdown Mode

· SOP-8P and Compact 4mmx4mm DFN-8 (DFN4x4-8) Packages

· 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