General Description

The MAX15059 constant-frequency pulse-width modulating (PWM) step-up DC-DC converter features an internal switch and a high-side current monitor with highspeed adjustable current limiting. This device is capable of generating output voltages up to 76V (300mW for the MAX15059A and 200mW for the MAX15059B) and provides current monitoring up to 4mA. The MAX15059 operates from 2.8V to 5.5V.

Features

♦ Input Voltage Range: +2.8V to +5.5V

♦ Wide Output-Voltage Range from (VIN + 5V) to 76V

♦ Internal 1Ω (typ) 80V MOSFET

♦ Boost Converter Output Power: 300mW

♦ 200mW Version Available for Smaller Inductor

♦ Accurate ±5 (1:1 and 5:1) High-Side Current Monitor

♦ Resistor-Adjustable Ultra-Fast APD Current Limit (1µs Response Time)

♦ Open-Drain Current-Limit Indicator Flag

♦ 400kHz Fixed-Switching Frequency

♦ Constant PWM Frequency Provides Easy Filtering in Low-Noise Applications

♦ Internal Soft-Start

♦ 2µA (max) Shutdown Current

♦ -40°C to +125°C Temperature Range

♦ Small, Thermally Enhanced, 3mm x 3mm, Lead-Free, 16-Pin TQFN-EP Package

Applications

    Avalanche Photodiode Biasing and Monitoring

    PIN Diode Bias Supply

    Low-Noise Varactor Diode Bias Supply

    FBON Modules

    GPON Modules