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5V/3.3V或可调、100%占空比、高效率、降压型DC-DC控制器

高效、低成本、降压控制器,非常适合1.5V CPU I/O供电

产品详情

主要特征

应用/用途

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 16.5
VOUT1 (V) (min) 1.3
VOUT1 (V) (max) 16
IOUT1 (A) (max) 3
Switch Type External
Output Adjust. Method Resistor
# DC-DC Outputs 1
Switching Frequency (kHz) 300
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
1.74
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简化框图

技术文档

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参量

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 3
VIN (V) (max) 16.5
VOUT1 (V) (min) 1.3
VOUT1 (V) (max) 16
IOUT1 (A) (max) 3
Switch Type External
Output Adjust. Method Resistor
# DC-DC Outputs 1
Switching Frequency (kHz) 300
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
1.74

主要特征

  • Reduce External Components and Total Cost
    • 300KHz PWM Switching Reduces Component Size
    • Tiny Surface-Mount Inductor
  • Reduce Power Dissipation
    • > 90% Efficiency from 3mA to 2A Loads
    • Low Dropout Voltage
    • 100% Maximum Duty Cycle
  • Reduce Number of DC-DC Controllers to Stock
    • Wide 2.6V to 16.5V Input Voltage Options
    • Selectable 3.3V and 5V or Adjustable 1.3V to 16V Output Voltage Options
  • Reduce System Power Consumption
    • 90µA Max Quiescent Current
    • 1µA Max Shutdown Current
  • Operates Reliably in Adverse Environment
    • Soft-Start Limits Startup Current
    • Current-Limited Control Scheme
  • Increase Design Flexibility
    • External P-Channel MOSFET Allows Output Power of > 12.5W

应用/用途

  • 5V至3.3V绿色PC应用
  • 电池供电应用
  • 手持式计算机
  • 高效降压转换器
  • 低成本笔记本电脑电源
  • 元件数最少的DC-DC转换器
  • PCMCIA电源
  • PDA及其它手持设备
  • 便携式终端

描述

The MAX1626/MAX1627 step-down DC-DC controllers operate over a 2.6V to 16.5V input voltage range. The controllers deliver load current from 1mA to more than 2A. The MAX1626 has pin-selectable 3.3V and 5V outputs. The MAX1627 supports adjustable outputs from 1.3V to 16V.

A unique current-limited, pulse-frequency-modulation (PFM) control scheme operates up to 100% duty cycle, resulting in very low dropout voltage. This control scheme eliminates minimum load requirements and reduces supply current under light loads to 90µA (versus 2mA to 10mA for common pulse-width modulation controllers).

The devices are available in a 8-pin SOIC package (-40°C to +85°C) and dice (0°C to +70°C).

简化框图

MAX1626、MAX1627:典型工作电路 MAX1626、MAX1627:典型工作电路 Zoom icon

技术文档

支持和培训

在Maxim的知识库中搜索技术问题的答案

过滤搜索

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