MAX25277

36V、2.5A、微型Buck转换器,3.5uA IQ

业界最佳、超低IQ 、微型Buck转换器,汽车应用的理想选择


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说明

MAX20077/MAX25277是小尺寸、同步降压型转换器,集成高边和低边开关。器件在3.5V至36V输入电压下提供高达2.5A (MAX20077ATCC/VY+版本为2.0A)电流,空载时的静态电流仅为3.5μA。

在FPWM模式下,器件在6V至18V工作输入电压范围下提供精度为±2%的输出电压。转换器具备20ns最小导通时间,能够提供较大输入至输出转换比。通过PGOOD信号,可监测电压质量。器件可工作在99%占空比的低压差模式,使其成为汽车和工业应用的理想选择。在FPWM模式下,器件提供5V和3.3V两种固定输出电压。此外,使用外部电阻分压器,可将器件配置为1V至10V输出电压。频率内部固定为2.1MHz,允许使用较小的外部元件,以及降低输出纹波、保证无AM干扰。也提供400kHz选项,可提供最小开关损耗和最大效率。器件在轻载时自动进入跳脉冲模式,空载时具有超低的3.5µA静态电流。器件提供引脚使能的扩频调制,将调制频率引起的EMI辐射发射降至最低。

提供MAX20077/MAX25277版本,采用小尺寸(3mm x 3mm)、12引脚、侧面可润湿TDFN封装,带有裸焊盘,需要极少外部元件。

关键特性

  • 同步DC-DC转换器,集成FET
    • MAX20077ATCA/VY+/B/D/E = 2.5A IOUT
    • MAX20077ATCC/VY+ = 2.0A IOUT
    • 待机模式下的静态电流仅为3.5μA
  • 小尺寸方案节省空间
    • 20ns最小导通时间
    • 2.1MHz或400kHz工作频率
    • 1V至10V可编程输出电压,或提供固定5V/3.3V选项
    • 固定3.5ms内部软启动
    • 固定输出电压,输出精度为±2% (5V/3.3V);或者外部电阻可调(1V至10V)输出,精度为±1.5% FB
    • 创新的电流模式控制结构,最大程度降低总电路板空间和BOM数量
  • PGOOD输出和高压EN输入,简化电源排序
  • 保护特性和工作范围是汽车应用的理想选择
    • 3.5V至36V工作VIN范围
    • 40V抛负载保护
    • 99%占空比,低压差
    • -40°C至+125°C汽车级温度范围
    • AEC-Q100认证

应用

  • 汽车
  • 高电压DC-DC转换器
  • 工业
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX20077 3.540110
3.3
5
Preset
Resistor
2.5InternalYesYes1
400
2100
EE-Sim
TDFN-CU/12
$1.09 @1k
MAX25277 3
TDFN-CU/12
-
查看所有Step-Down Switching Regulators (367)
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。


MAX20077EVKIT: MAX20077评估板

质量和环境数据

申请可靠性报告: MAX25277 
无铅封装的锡(Sn)晶须报告

工具和模型

  • EE-Sim: MAX25277 设计和仿真
  • CAD Symbols and Footprints

  • MAX25277ATCA/VY+
  • MAX25277ATCB/VY+
  • 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。

    质量管理体系 >
    环境管理体系 >

     
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    评估板10053MAX20077EVKIT MAX20077评估板