LT3482IUD#PBF

LT3482 is a fixed 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. It 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. Constant switching frequency results in predictable output noise that is easy to filter. The inductor-based topology ensures an input free from switching noise. An integrated high side current monitor produces a current proportional to APD current with better than 10% relative accuracy over four decades of dynamic range in the input range of 250nA to 2.5mA. It is widely used in application such as APD bias, PIN diode bias, optical receivers and modules, fiber optic network equipment etc.

• Switch current limit is 360mA typical
• High side APD current monitor
• Switching frequency is 650KHz typical at (fSET = 0V)
• Wide input voltage range is 2.5V to 16V
• Surface mount components, soft start
• Internal compensation, CTRL pin allows output adjustment with no polarity inversion
• Supply current is 3.3mA typical at (FB = 1.3V, not switching)
• Maximum duty cycle is 95% minimum
• Operating temperature is -40°C to 125°C
• Package style is 16-lead plastic QFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party