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MAX77827

MAX77827

5.5V输入、1.8A/3.1A开关升/降压转换器，6μA IQ

高效率、低IQ升/降压转换器

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概述

说明

MAX77827为高效率升/降压转换器，适用于单节锂离子供电应用，6μA典型静态电流为业界最低。器件支持1.8V至5.5V输入电压范围，输出电压范围为2.3V至5.3V。IC提供两种不同的开关电流(1.8A和3.1A)，根据给定的负载电流需求优化外部元件尺寸。使用1.8A开关限流选项时，IC在降压模式下可支持高达1.0A负载电流，在升压模式下(VIN = 3.0V，VOUT = 3.3V)支持900mA负载电流。

为电池供电的便携式应用提供电源轨的DC/DC转换器方案中，96%峰值效率使该IC成为最佳选择之一，

IC具有可调节输出电压功能，可通过单个电阻在2.3V至5.3V范围内设置。2个GPIO引脚支持强制PWM使能和电源就绪(POK)指示。独特的控制算法允许高效、卓越的电源/负载瞬态响应，以及在降压和升压模式之间平稳切换。这些性能可以提供设计上的灵活性，允许IC覆盖较宽的应用范围和应用场景，同时最大程度减小电路板面积。

MAX77827采用1.61mm x 2.01mm、12焊球晶圆级封装(WLP)。

MAX77827: Simplified Block Diagram MAX77827: Simplified Block Diagram 放大+

关键特性

  • 1.8V至5.5V输入电压范围
  • 2.3V至5.3V单电阻可调节输出电压
  • 1.6A最大输出电流(3.1A ILIM选项，降压模式)
  • 900mA最大输出电流(1.8A ILIM选项，升压模式，3.0VIN，3.3VOUT)
  • 96%峰值效率(3.3VIN，3.3VOUT)
  • 跳脉冲模式，轻载时保持高效
  • 6μA超低典型静态电流(@ TJ = +25°C)
  • 2.5MHz标称开关频率
  • 使能引脚
  • GPIO引脚，便于系统设计
    • FPWM (强制PWM)模式选择引脚
    • POK指示引脚
  • UVLO、软启动、有源输出放电、过流和热关断保护
  • 1.61mm x 2.01mm、12焊球WLP封装

应用

  • 单节Li+电池供电设备
  • 智能手机/便携/可穿戴设备
  • 物联网(IoT)设备
  • NB-IoT设备

参数规格

Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		Preset VOUT
(V)		VOUT1 Tolerance
(±%)		IOUT1
(A)		Output Adjust. MethodSwitch TypeSynchronous SwitchingPower Good SignalICC
(mA)		DC-DC OutputsAlternate TopologyOper. Freq.
(kHz)		Design ToolsPackage/PinsOper. Temp.
(°C)		Budgetary
Price
minmaxminmaxmaxSee Notes
MAX77827 1.85.52.35.33.311.5
Preset
Resistor
InternalYesYes11
Step-Down
Step-Up
2500EE-Sim
FC2QFN/14
WLP/12
-40 to +125$0.88 @1k
查看所有Step-Down/Up Switching Regulators (30)
Pricing Notes:
价格仅供参考，用于同类产品的比较。所提供报价为美元，需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题，请参考：价格与供货网站或与指定代理商联系。

设计资源


MAX77827EVKIT: MAX77827 评估套件

技术资料

应用笔记 7002 Choose the Right Buck-Boost for Your IoT Tracker

质量和环境数据

申请可靠性报告: MAX77827 
无铅封装的锡（Sn）晶须报告

工具和模型

  • EE-Sim: MAX77827 设计和仿真

    • 质量与环境

    型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注： 通过技术手段对故障率进行汇总，并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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    工具和模型

    技术文档

    类型 编号 PDF 标题
    应用笔记 7002 Choose the Right Buck-Boost for Your IoT Tracker

    设计指南

    PDF 标题
    移动电源

    参考设计

    类型 编号 标题
    评估板10223MAX77827EVKIT Evaluation Kit for the MAX77827