General Description

The MAX15031 consists of a constant-frequency pulse width modulating (PWM) step-up DC-DC converter with an internal switch and a high-side current monitor with high-speed adjustable current limiting. This device can generate output voltages up to 76V and provides current monitoring up to 4mA (up to 300mW). The MAX15031 can be used for a wide variety of applications such as avalanche photodiode biasing, PIN biasing, or varactor biasing, and LCD displays. The MAX15031 operates from 2.7V to 11V.

Features

♦ Input Voltage Range

   +2.7V to +5.5V (Using Internal Charge Pump) or

   +5.5V to +11V

♦ Wide Output-Voltage Range from (VIN + 1V) to 76V

♦ Internal 1Ω (typ) 80V Switch

♦ 300mW Boost Converter Output Power

♦ Accurate ±10 (500nA to 1mA) and ±3.5 (1mA to 4mA) 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, 4mm x 4mm, 16-Pin TQFN Package