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24V、600mA内置开关、100%占空比、降压型转换器

产品详情

主要特征

应用/用途

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 24
VOUT1 (V) (min) 1.25
VOUT1 (V) (max) 24
IOUT1 (A) (max) 0.6
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
# DC-DC Outputs 1
Switching Frequency (kHz) 200
Package/Pins UMAX/8
Budgetary
Price (See Notes)
4.38
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参量

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 24
VOUT1 (V) (min) 1.25
VOUT1 (V) (max) 24
IOUT1 (A) (max) 0.6
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
# DC-DC Outputs 1
Switching Frequency (kHz) 200
Package/Pins UMAX/8
Budgetary
Price (See Notes)
4.38

主要特征

  • 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

应用/用途

  • 分布式供电系统
  • 手持式设备
  • 不间断电源
  • 笔记本电脑

描述

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.

简化框图

MAX1776:典型工作电路 MAX1776:典型工作电路 Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心