HEXIN HX1001-KEC

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.

• 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)

• Digital cameras and MP3
• Palmtop computers / PDAs
• Cellular phones
• Wireless handsets and DSL modems
• Portable media players
• PC cards