DESCRIPTION
The LT®3482 is a fi xed frequency current mode step-up DC/DC converter with voltage doubler designed to bias avalanche photodiodes (APDs) in optical receivers. It can provide up to 90V output. The LT3482 features high side APD current monitoring with better than 10% relative accuracy over the entire temperature range. The integrated power switch, Schottky diodes and APD current monitor allow a small converter footprint and low solution cost.

FEATURES
■  High Output Voltage: Up to 90V
■  Integrated Schottky Diodes
■  48V, 280mA Internal Switch
■  High Side APD Current Monitor
■ Adjustable Switching Frequency: 650kHz or 1.1MHz
■Wide VINRange: 2.5V to 16V
■ Surface Mount Components
■ Low Shutdown Current: <1µA
■Soft-Start
■Internal Compensation
■ CTRL Pin Allows Output Adjustment with No Polarity Inversion
■3mm ×3mm 16-Lead QFN Package

APPLICATIONS
■APD Bias
■ PIN Diode Bias
■ Optical Receivers and Modules
■ Fiber Optic Network Equipment