MAX16938

36V、220KHz至2.2MHz降压转换器,静态电流28μA

2.5A汽车Buck转换器,轻载时工作在FPWM,便于EMI控制


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说明

MAX16936为2.5A电流模式、降压转换器,集成高边和低边MOSFET,配合外部肖特基二极管获得更高效率。在轻载应用中,低边MOSFET采用固定频率强制PWM (FPWM)工作模式。器件采用3.5V至36V电源供电,空载时静态电流为28µA。开关频率通过电阻设置在220KHz至2.2MHz,也可同步到外部时钟。MAX16936输出电压可提供5V/3.3V固定输出或1V至10V可调节输出。宽输入电压范围或瞬态欠压时,可以工作在98%占空比,这些特性使得MAX16936非常适合汽车和工业应用。

轻载应用中,FSYNC逻辑输入允许MAX16936工作在SKIP模式,以减小电流损耗;也可工作在固定频率FPWM模式,以降低EMI。对于需要严格控制辐射的RF收发器电源设计而言,固定频率FPWM模式非常有效。保护功能包括:逐周期限流以及带自动恢复的热关断。其它特性包括:电源就绪指示、便捷的电源排序、SYNCOUT引脚输出与内部振荡器错相180°时钟等。多片MAX16936可构成电源级联。

MAX16936工作在-40°C至+125°C汽车级温度范围,采用16引脚TSSOP-EP封装和5mm × 5mm 、16引脚TQFN-EP封装。
MAX16936: Typical Application Circuit MAX16936: Typical Application Circuit 放大+

关键特性

  • 集成和高开关频率节省空间
    • 集成2.5A高边开关
    • 低BOM电流模块控制结构
    • 固定输出电压,输出精度为±2% (5V/3.3V);或外部电阻可调(1V至10V)。
    • 220kHz至2.2MHz开关频率,三种工作模式(跳脉冲模式、强制固定频率、外部频率同步)
    • LX摆率自动调节,整个工作频率范围内实现效率最优
  • SYNCOUT引脚180°错相输出,支持级联电源,提高功率输出
  • 扩频调制降低EMI辐射
  • 较宽输入电压范围,支持汽车应用
    • 3.5V至36V输入电压范围
    • 使能输入支持3.3V逻辑电平至42V电压
  • 可靠的性能支持较宽范围的汽车应用
    • 42V抛负载保护
    • -40°C至+125°C汽车级温度范围
    • 热关断保护
    • AEC-Q100认证
  • 电源就绪输出允许电源排序
  • 严格的过压保护提供较小的过冲电压(MAX16938)

应用

  • DC动力系统分配
  • 导航及无线电头单元
  • 载荷应用
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypePower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX16936 3.542110
3.3
5
Preset
Resistor
2.5InternalYes1
200
2200
EE-Sim
TQFN/16
TSSOP/16
$2.69 @1k
MAX16938 
TQFN/16
TSSOP/16
$3.96 @1k
查看所有Step-Down Switching Regulators (389)
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。


MAX16936EVKIT: Evaluation Kit for the MAX16936/MAX16938/MAX16939

质量和环境数据

申请可靠性报告: MAX16938 
无铅封装的锡(Sn)晶须报告

工具和模型

  • EE-Sim: MAX16938 设计和仿真
  • MAX16938 SIMPLIS Schematic
  • 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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