MAX16909

PRODUCTION

36V, 220kHz to 1MHz Step-Down Converter with Low Operating Current

36V, 3A Automotive Buck Supports Truck Applications

Data Sheet (Rev. 4) Product Selection Table
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Overview

  • Wide 3.5V to 36V Input Voltage Range
  • 42V Input Transients Tolerance
  • High Duty Cycle During Undervoltage Transients
  • 5V Fixed or 1V to 10V Adjustable Output Voltage
  • Integrated 3A Internal High-Side (70mΩ typ) Switch
  • Fast Load-Transient Response and Current-Mode Architecture
  • Adjustable Switching Frequency (220kHz to 1MHz)
  • Frequency Synchronization Input
  • 30µA Standby Mode Operating Current
  • 5µA Typical Shutdown Current
  • Overvoltage, Undervoltage, Overtemperature, and Short-Circuit Protections

The MAX16909 is a 3A, current-mode, step-down converter with an integrated high-side switch. The device is designed to operate with input voltages from 3.5V to 36V while using only 30µA quiescent current at no load. The switching frequency is adjustable from 220kHz to 1MHz by an external resistor and can be synchronized to an external clock. The output voltage is pin selectable to be 5V fixed or adjustable from 1V to 10V. The wide input voltage range along with its ability to operate at high duty cycle during undervoltage transients make the device ideal for automotive and industrial applications.

The device operates in skip mode for reduced current consumption in light-load applications. Protection features include overcurrent limit, overvoltage, and thermal shutdown with automatic recovery. The device also features a power-good monitor to ease power-supply sequencing.

The device operates over the -40°C to +125°C automotive temperature range, and is available in 16-pin TSSOP and TQFN (5mm x 5mm) packages with exposed pads.

Applications

  • Automotive
  • High-Voltage Input DC-DC Converter
  • Industrial
  • Point-of-Load Applications
MAX16909
36V, 220kHz to 1MHz Step-Down Converter with Low Operating Current
MAX16909: Typical Application Circuit
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 2
MAX16907
PRODUCTION 36V, 2.2MHz Step-Down Converter with Low Operating Current
MAX16974
NOT RECOMMENDED FOR NEW DESIGNS High-Voltage, 2.2MHz, 2A Automotive Step-Down Converter with Low Operating Current
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Evaluation Kits

MAX16909EVKIT

Evaluation Kit for the MAX16909

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Features and Benefits

  • Wide 3.5V to 36V Input Supply Range
  • Pin-Programmable Adjustable Output Voltage
  • Adjustable Switching Frequency (400kHz Default)
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX16909 evaluation kit (EV kit) demonstrates the MAX16909 3A, current-mode step-down converter with an integrated high-side switch. The EV kit operates over a wide 3.5V to 36V input voltage range. The EV kit has a switching frequency of 400kHz and a voltage output of 1.8V at 3A.

Applications

  • Automotive
  • High-Voltage Input DC-DC Converter
  • Industrial/Military
  • Point-of-Load Applications
MAX16909EVKIT
Evaluation Kit for the MAX16909

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