General Description

The MAX16936 is a 2.5A current-mode step-down converter with integrated high-side and low-side MOSFETs designed to operate with an external Schottky diode for better efficiency. The low-side MOSFET enables fixed-frequency forced-PWM (FPWM) operation under light-load applications. The device operates with input voltages from 3.5V to 36V, while using only 28FA quiescent current at no load. The switching frequency is resistor programmable from 220kHz to 2.2MHz and can be synchronized to an external clock. The MAX16936’s output voltage is available as 5V/3.3V fixed or adjustable from 1V to 10V. The wide input voltage range along with its ability to operate at 98 duty cycle during undervoltage transients make the MAX16936 ideal for automotive and industrial applications.

Features

♦ Wide 3.5V to 36V Input Voltage Range

♦ 42V Load Dump Protection

♦ Enhanced Current-Mode Control Architecture

♦ Fixed Output Voltage with ±2 Accuracy (5V/3.3V) or Externally Resistor Adjustable (1V to 10V)

♦ 220kHz to 2.2MHz Switching Frequency with Three Operation Modes

    ◇ 28µA Ultra-Low Quiescent Current Skip Mode

    ◇ Forced Fixed-Frequency Operation

    ◇ External Frequency Synchronization

♦ Spread-Spectrum Frequency Modulation

♦ Automatic LX Slew Rate Adjustment for Optimum Efficiency Across Operating Frequency Range

♦ 180° Out-of-Phase Clock Output at SYNCOUT

♦ Low-BOM-Count Current-Mode Control Architecture

♦ Power-Good Output

♦ Enable Input Compatible from 3.3V Logic Level to 42V

♦ Thermal Shutdown Protection

♦ -40°C to +125°C Automotive Temperature Range

♦ AEC-Q100 Qualified

Applications

    Point of Load Applications

    Distributed DC Power Systems

    Navigation and Radio Head Units