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HX1001-Synchronous Buck DC/DC Converter
日期：2015-8-25 9:28:37 点击：3972

Features

Ø Up to 95% Efficiency

Ø Current Mode Operation for Excellent Line and Load Transient Response

Ø 700mA Output Current

Ø Low Quiescent Current: 200μA

Ø Output Voltage: 0.6V ～ 5.5V

Ø Automatic PWM/PFM Mode Switching

Ø No Schottky Diode Required

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

Ø Short-Circuit Protection

Ø Shutdown Quiescent Current: <1μA

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

Typical Application Circuit

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).

Applications

Ø Digital cameras and MP3

Ø Palmtop computers / PDAs

Ø Cellular phones

Ø Wireless handsets and DSL modems

Ø Portable media players

Ø PC cards

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