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MAX77596

MAX77596

24V、300mA、降压转换器，1.1μA IQ

宽VIN范围、低IQ、高占空比以及小方案尺寸的完美组合

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概述

说明

MAX77596是一颗小尺寸、同步降压转换器，开关内置。在3.5V至24V输入电压，器件设计提供达300mA电流，然而空载时的静态电流仅为1.1μA (固定输出版本)。通过低电平有效的RESET信号，可监测电压质量。器件可工作在接近断开的98%的占空比，使其适用于电池供电应用。

器件提供固定3.3V、5V输出版本以及可调节输出版本。对于可调节输出版本，用户可使用电阻分压在1V至10V之间调节输出电压。频率固定为1.7MHz，这样可使用较小的外部元件以及降低输出纹波。器件提供强制PWM和跳脉冲工作模式，跳脉冲模式下的静态电流仅为1.1μA。

Max77596为(2mm x 2.5mm) 10-pin TDFN小封装，工作温度范围为-40°C 至 +85°C。
MAX77596: Block Diagram MAX77596: Block Diagram 放大+

关键特性

  • 要求较宽输入电压范围的系统电源
    • VIN范围：3.5V至24V
    • 高达300mA输出电流
    • 固定3.3V或5V，1V至10V可编程输出电压
    • 98% (最大值)占空比，低压差
    • 采用5V、12V或20V USB C型输入电源供电
    • 采用2S、3S或4S锂离子电池供电
  • 功耗最低、延长电池寿命
    • 1.1μA静态电流(3.3V固定输出电压)
    • 12VIN、3.3VOUT时的峰值效率为86%
  • 方案尺寸最小
    • 1.7MHz工作频率
    • 小尺寸、2.0mm x 2.5mm x 0.75mm、10引脚TDFN封装
  • 可靠的方案
    • 短路、热保护
    • 6.67ms内部软启动，最大程度减小浪涌电流
    • 电流模式控制方法
    • 高达42V输入电压容限

应用

  • 负载点应用
  • 利用2、3s或4s Li+电池组供电的便携式设备
  • USB C型设备

参数规格

Part NumberVIN
(V)		VIN
(V)		VOUT1
(V)		VOUT1
(V)		Preset VOUT
(V)		Output Adjust. MethodIOUT1
(A)		Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)		Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX77596 3.524110
3.3
5
Preset
Resistor
0.3InternalYes11700EE-Sim
TDFN/10
$1.58 @1k
查看所有Step-Down Switching Regulators (388)
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


MAX77596EVKIT: MAX77596评估板

质量和环境数据

产品可靠性报告: MAX77596.pdf 
无铅封装的锡（Sn）晶须报告

工具和模型

  • EE-Sim: MAX77596 设计和仿真
  • MAX77596 SIMPLIS Schematic

    •

    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

    参考设计

    类型 编号 标题
    评估板8895MAX77596EVKIT MAX77596评估板