HX1001中文资料Synchronous Buck DC/DC Converter数据手册HXSEMI规格书

描述 Description

The HX1001 is high efficiency synchronous, PWM step-down DC/DC converters working under an input voltage range from 2.2V to 5.5V. This feature makes the HX1001 suitable for single Li-Lon battery-powered applications. 100% duty cycle capability extends battery life in portable devices, while the quiescent current is 200μA with no load, and drops to <1μA in shutdown.

The internal synchronous switch is desired to increase efficiency without an external Schottky diode. The 1.0MHz/1.4MHz switching frequency allows the using of tiny, low profile inductors and ceramic capacitors, which minimized overall solution footprint.

The HX1001 converters are available in the industry standard TSOT/SOT-23-5L power packages (or upon request).

特性 Features

· Up to 95% Efficiency

· Current Mode Operation for Excellent Line and Load Transient Response

· 700mA Output Current

· Low Quiescent Current: 200μA

· Output Voltage: 0.6V ～ 5.5V

· Automatic PWM/PFM Mode Switching

· No Schottky Diode Required

· Frequency Operation: 1.0MHz for Fixed Output Voltage and 1.4MHz for Adjustable Output Voltage

· Short-Circuit Protection

· Shutdown Quiescent Current: <1μA

· Low Profile TSOT/ SOT-23-5L Package (lead-free packaging is now available)

应用 Application

· Digital cameras and MP3

· Palmtop computers / PDAs

· Cellular phones

· Wireless handsets and DSL modems

· Portable media players

· PC cards