RT8541A Overview
The RT8541/A is a constant frequency current mode PWM step-up DC/DC converter designed to bias avalanche photodiodes (APD) at high voltage in optical receivers. It includes a voltage doubler charge pump to significantly reduce the noise level at output up to 90V. The RT8541A switching frequency can be adjusted by a resistor while RT8541 is internally set at 650kHz.
RT8541A Key Features
- Integrated Schottky Diodes for Charge Pump Voltage Doubler
- 50V, 400mA Internal Switch
- High Side Low Noise and Accurate APD Current
- 650kHz Fixed Switching Frequency for RT8541 and
- Wide VIN Range : 2.7V to 16V
- Adjustable APD Current Limit with External Resistor
- Low Shutdown Current <1μA
- Built-In Soft-Start
- CTRL Pin Allows Output Adjustment with no Polarity
- Thin 16-Lead WQFN Package