Capable of operating over a 0.6V to 5.5V input voltage range, the L6920 is a TSSOP8-packaged, high-efficiency synchronous step-up converter with a guaranteed start-up voltage of 1V. Targeted at products running off of one- to three-cell batteries, the step-up controller requires only three external components to create a device that can convert battery voltages to selected output voltages. The converter's synchronous rectifier is implemented with a 120 m½ P-channel MOSFET, and, to improve efficiency, variable frequency control circuitry is included on-chip. Other L6920 features include zero shut-down current, 3.3V and 5V fixed or adjustable output voltage (2V up to 5.2V), and low battery voltage detection. For more details, contact Edward Friedman at STMICROELECTRONICS INC., Lexington, MA. (781) 402-8529.
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