Descriptions of LT3905EUD#TRPBF provided by its other distributors.
LT3905 - Boost DC/DC Converter with APD Current Monitor
IC REG BOOST ADJ 350MA 16QFN
DC-DC CONV, BOOST, 1.1/2.2MHZ, QFN-16, FULL REEL
IC;LN PWR DC2DC;SM;QFN16 3X3MM;-40C TO 1
DC TO DC CONVERTER
The LT3905 is a fixed frequency current-mode step-up converter designed to bias avalanche photodiodes (APD) in optical receivers. The LT3905 features high side APD current monitoring over four decades of dynamic range with better than 2% relative accuracy over the 3μA to 3mA range. The maximum APD current is programmed with a single resistor, and a fast current limiter with indicator protects the APD during overload conditions. Adjustable output voltage provides dynamic bias control, and an adjustable loss-of-signal indicator flags low APD current. Coupled with the integrated DMOS power switch and Schottky rectifier, the LT3905 provides a compact total solution with few external components and low solution cost. Constant switching frequency results in predictable output noise that is easy to filter. The LT3905 is available in the tiny footprint (3mm × 3mm) 16-Lead QFN Package. Applications APD Bias PIN Diode Bias Optical Receivers and Modules Fiber Optic Network Equipment