Semtech introduces the SC4501, SC4502 and SC4502H, a family of current-mode, adjustable-frequency, step-up (boost) converters with an internal 2 A, 40 V switch. Each converter can be adapted in a variety of topologies, such as boost, sepic and flyback, for generating high output voltage from multi-cell alkaline, NiCd, NiMH or single-cell Li-ion batteries. The boost converters operate from input voltages as low as 1.4 V to generate outputs to 40 V at efficiencies over 90%. Switching frequency can be programmed using a single resistor to select the desired value between 250 kHz and 2 MHz. A high frequency of operation enables the system designer to minimize external component size and avoid interference with noise sensitive frequency bands in the system.
Semtech Corporation
Semtech Corp.
200 Flynn Road
Camarillo, CA, 93012
