DESCRIPTION

The LTC?1517-5 is a micropower charge pump DC/DC converter that produces a regulated 5V output. The input voltage range is 2.7V to 5V. Extremely low operating current (typically 6μA with no load) and low external parts count (one 0.1μF flying capacitor and two small bypass capacitors at VIN and VOUT) make the part ideally suited for small, light load battery-powered applications. The total printed circuit board area of the application circuit shown below is only 0.045in2.

FEATURES

■ Ultralow Power: ICC = 6μA Typ

■ Short-Circuit/Thermal Protected

■ 5V ±4 Regulated Output

■ VIN Range: 2.7V to 5V

■ Output Current: 10mA (VIN ≥ 2.7V) 20mA (VIN ≥ 3V)

■ No Inductors

■ Ultrasmall Application Circuit (0.045in2)

■ 800kHz Switching Frequency

■ Available in 5-Pin SOT-23

APPLICATIONS

■ Cellular Telephones

■ Battery-Operated Equipment

■ Local Power Supplies

■ Handheld Instruments

■ PCMCIA Supplies