MAX17233

3.5V至36V、2.2MHz、双路同步Buck控制器,20μA静态电流

双路同步Buck控制器,宽VIN (3.5V至42V)和低IQ(20μA)


点击查看特定型号的库存状况。

说明

MAX17232/MAX17233提供双路同步降压型DC-DC控制器,集成MOSFET。器件工作在3.5V至36V输入电压范围,具有42V输入瞬态保护,能够以95%占空比工作在低压差条件。控制器可产生3.3V/5V固定输出电压,同时具备在1V至10V范围内编程输出电压的能力。

器件采用峰值限流控制模式,也可工作在脉宽调制(PWM)或脉冲频率调制(PFM)控制模式。PWM工作模式在任何负载条件下都保持固定频率工作,在对开关频率敏感的应用中非常有用。PFM工作模式消除了负向电感电流以及轻载条件下额外的跳脉冲,以提高效率。内置低导通电阻MOSFET确保满载时高效工作,同时也简化了布局。

器件采用28引脚TQFN-EP封装,带裸焊盘,工作在-40°C至+85°C温度范围。

MAX17232, MAX17233: Block Diagram MAX17232, MAX17233: Block Diagram 放大+

关键特性

  • 无需外部元件,降低总体成本
    • 无需肖特基同步二极管即可保持高效、低成本工作
    • 简单的外部RC补偿,在任意输出电压下均可稳定工作
    • 全陶瓷电容设计:超紧凑布局
    • 180°错相工作降低输出纹波,支持级联电源
  • 减少DC-DC控制器库存清单
    • 固定输出电压,输出精度为±1% (5V/3.3V);或外部电阻可调(1V至10V)。
    • 220kHz至2.2MHz可调节频率,带外同步
    • 频率同步输入
  • 降低功耗
    • 效率最高达92%
    • 关断电流仅8μA (典型值)
    • PFM模式下静态电流仅20μA (典型值)
  • 工作可靠
    • 42V输入电压瞬态保护
    • 逐周期限流、热关断
    • 电源过压和欠压锁定
    • 电源就绪监测
    • 通过扩频控制降低EMI辐射
    • 50ns (典型值)最小导通时间保证2.2MHz时低占空比PWM操作

应用

  • 配电稳压器
  • 通用负载点电源
  • 壁式变压器稳压
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
MAX17232 3.536110
3.3
5
Preset
Resistor
10ExternalYesYes21000EE-Sim
TQFN/28
$2.59 @1k
MAX17233 2200
TQFN/28
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。


MAX17233EVKIT: MAX17232 / MAX17233评估板

质量和环境数据

申请可靠性报告: MAX17233 
无铅封装的锡(Sn)晶须报告

工具和模型

  • EE-Sim: MAX17233 设计和仿真
  • MAX17233 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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    类型 编号 标题
    评估板8997MAX17233EVKIT MAX17232 / MAX17233评估板