DESCRIPTION

The LT®3473/LT3473A are micropower step-up DC/DC converters with integrated Schottky diode and output disconnect circuitry in low profile DFN packages. The small package size, high level of integration and the use of tiny SMT components yield a solution size of less than 50mm2. The internal 1A switch allows the device to deliver 25V at up to 80mA from a Li-Ion cell, while automatic Burst Mode operation maintains efficiency at light load.

FEATURES

■ Tiny Solution Size
■ Low Quiescent Current: 150µA in Active Mode (VIN = 3.6V, VOUT = 15V, No Load) 1µA in Shutdown Mode
■ Internal 1A, 36V Switch
■ Integrated Schottky Diode
■ Integrated PNP Output Disconnect
■ Internal Reference Override Pin
■ PGOOD Pin
■ 25V at 80mA from 3.6V Input
■ Auxiliary NPNs for Intermediate Bias Voltages (LT3473A)
■ Automatic Burst Mode® Operation at Light Load
■ Constant Switching Frequency: 1.2MHz
■ Thermal Shutdown
■ Input Range: 2.2V to 16V
■ Low Profile (3mm × 3mm) DFN Package (LT3473)
■ Low Profile (4mm × 3mm) DFN Package (LT3473A)

APPLICATIONS

■ OLED Bias
■ CCD Bias