The MAX15031 evaluation kit (EV kit) demonstrates the MAX15031 APD biasing pulse-width modulation (PWM) step-up DC-DC converter with an internal power switch, current monitor, and adjustable current limiting. The step-up converter switches at 400kHz. The EV kit operates from a DC supply voltage of 2.9V to 5.5V and is configured to deliver approximately 70V and 0 to 4mA of current at the output. The output voltage can be configured from VIN + 1V to 76V by replacing a resistor or adjusting the CNTRL voltage. The EV kit demonstrates the MAX15031 APD fast current-limit, undervoltage lockout (UVLO), and thermal shutdown features.
The actual converter circuit's PCB footprint is 8mm x 18mm as required in BPON (broadband passive optical network) and GPON (gigabit passive optical network) applications and demonstrates the MAX15031's small, 16-pin TQFN package with exposed pad. The EV kit also features an APD input load simulator circuit for current monitoring and step-response measurements.
WARNING: Voltages exceeding 42V may exist on the VOUT, APD, MOUT, and PGND PCB pads.
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