HIGH EFFICIENCY SYNCHRONOUS STEP-UP DC-DC CONVERTER WITH LOW STARTUP VOLTAGE

DESCRIPTION

The UTC UU05052 is a high-efficiency synchronous step-up

DC-DC converter. The startup voltage of this device is just 1V,

making it ideal for applications operating from 1 or 2 alkaline cells.

The device consumes just 17µA of quiescent supply current, and

provides up to 400mA output current using a minimum number of

readily available standard external components.

The device includes 0.19Ω N-channel power switch and 0.21Ω

P-channel synchronous rectifier. Synchronous rectification and

unique control scheme contribute to a high efficiency over a wide

range of loads.

The UTC UU05052 features fixed 3.3V/5V or from 2V to 5V

adjustable output voltage.

FEATURES

* Low Startup Voltage of 1V

* 17µA Of Quiescent Supply Current

* Less Than 1µA Of Shutdown Current

* Fully Integrated N-channel Power Switch and P-channel Synchronous Rectifier

* Fixed 3.3V/5V or Adjustable Output Voltage