MAX1776

PRODUCTION

24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter

Data Sheet (Rev. 2) Product Selection Table
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Overview

  • Fixed 5V or Adjustable Output
  • 4.5V to 24V Input Voltage Range
  • Up to 600mA Output Current
  • Internal 0.4Ω P-Channel MOSFET
  • Efficiency Over 95%
  • 15µA Quiescent Supply Current
  • 3µA Shutdown Current
  • 100% Maximum Duty Cycle for Low Dropout
  • Current-Limited Architecture
  • Thermal Shutdown
  • Small 8-µMAX Package

The MAX1776 high-efficiency step-down converter provides an adjustable output voltage from 1.25V to VIN from supply voltages as high as 24V. An internal current-limited 0.4Ω MOSFET delivers load currents up to 600mA. Operation to 100% duty cycle minimizes dropout voltage (240mV at 600mA).

The MAX1776 has a low 15µA quiescent current to improve light-load efficiency and conserve battery life. The device draws only 3µA while in shutdown.

High switching frequencies (up to 200kHz) allow the use of tiny surface-mount inductors and output capacitors. The MAX1776 is available in an 8-pin µMAX package, which uses half the space of an 8-pin SO. For increased output drive capability, use the MAX1626/ MAX1627 step-down controllers, which drive an external P-channel MOSFET to deliver up to 20W.

Applications

  • Distributed Power Systems
  • Handheld Devices
  • Keep-Alive Supplies
  • Notebook Computers
MAX1776
24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter
MAX1776: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 2
MAX1836
PRODUCTION 24V Internal Switch, 100% Duty Cycle, Step-Down Converters
MAX1837
PRODUCTION 24V Internal Switch, 100% Duty Cycle, Step-Down Converters
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Evaluation Kits

MAX1776EVKIT

Evaluation Kit for the MAX1776

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Features and Benefits

  • +5.5V to +24V Input Voltage Range (for Fixed +5V Output)
  • +4.5V to +24V Input Voltage Range (for +3.3V Output)
  • Output Voltage Fixed +5V Adjustable Output (+1.25V to +23.5V)
  • 500mA Output Current
  • 3µA IC Shutdown Mode
  • 8-Pin µMAX Package
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

The MAX1776 evaluation kit (EV kit) provides a +5.0V output voltage from a +5.5V to +24V input source. It delivers 500mA output current and operates up to 100% duty cycle at dropout. The MAX1776 is a step-down switching regulator with an internal power switch.

The EV kit is a fully assembled and tested surface-mount PC board. It can also be used to evaluate other output voltages in the +1.25V to +23.5V range by adding the feedback resistors and changing a jumper setting.

Applications

  • Distributed Power Systems
  • Handheld Devices
  • Keep-Alive Supplies
  • Notebook Computers
MAX1776EVKIT
Evaluation Kit for the MAX1776

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