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Maxim Integrated MAX16952

36V, 2.2MHz Step-Down Controller with Low Operating Current

Overview

TopologyBuck Converter
Input voltage5.5-36 V
Switching frequency1800-2200 kHz
Output 15 V / 5 A
IC revision6

Description

The MAX16952 is a current-mode, synchronous PWM step-down controller designed to operate with input voltages from 3.5V to 36V while using only 50μA of quiescent current at no load. The switching frequency is adjustable from 1MHz to 2.2MHz by an external resistor and can be synchronized to an external clock up to 2.4MHz. The MAX16952 output voltage is pin programmable to be either 5V fixed, or adjustable from 1V to 10V. The wide input voltage range, along with its ability to operate in dropout during undervoltage transients, makes it ideal for automotive and industrial applications.The MAX16952 operates in fixed-frequency PWM mode and low quiescent current skip mode. It features an enable logic input, which is compatible up to 42V to disable the device and reduce its shutdown current to 10μA. Protection features include overcurrent limit, overvoltage,undervoltage, and thermal shutdown with automatic recovery. The device also features a power-good monitor to ease power-supply sequencing.The MAX16952 is available in a thermally enhanced 16-pin TSSOP package with an exposed pad, and is specified for operation over the -40°C to +125°C automotive temperature range.

Features

  • Wide 3.5V to 36V Input Voltage Range
  • 42V Input Transient Tolerance
  • High Duty Cycle During Undervoltage Transients
  • 1MHz to 2.2MHz Adjustable Switching Frequency
  • Adjustable (1V to 10V) Output Voltage with ±2% Accuracy
  • Three Operating Modes 50µA Ultra-Low Quiescent Current Skip ModeForced Fixed-Frequency ModeExternal Frequency Synchronization
  • Lowest BOM Count, Current-Mode Control Architecture
  • Power-Good Output
  • Enable Input Compatible from 3.3V Logic Level to 42V
  • Current-Limit, Thermal Shutdown, and Overvoltage Protection
  • -40°C to +125°C Automotive Temperature Range
  • Automotive Qualified

Typical applications

  • Military
  • Industrial
  • Automotive
  • Point of Load

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