MAX17020

双通道Quick-PWM、降压型控制器,具有低功耗LDO和RTC电源

多功能控制器,可配置用于笔记本电脑的系统供电以及图形卡、存储器供电


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说明

MAX17020带同步整流的双通道Quick-PWM™降压电源(SMPS)控制器,用于生成电池供电系统的5V/3.3V主电源或1.5V/1.05V I/O电源。低边MOSFET检测提供简单的低成本、高效电流检测功能,可实现谷电流限制保护。限流功能与输出过压和欠压保护功能相结合,确保可靠的输出电压。

工作在跳脉冲模式或超声模式时,5V/3.3V或1.5V/1.05V SMPS输出可以节省功耗并避免产生可闻噪声。超声模式强制控制器将轻载时的开关频率维持在大于20kHz的水平。

内部100mA线性稳压器可以产生上电或其它低功耗“常备电路”所需的5V偏置电压。当SMPS启动时,独立的旁路输入可以自动旁路线性稳压器。

该主控制器还具有次级反馈输入,在SECFB电压降至其门限电压以下时触发一个超声波脉冲(DL1开启)。这样可以在不对输出电压产生过充的情况下,由DL1驱动刷新外部电荷泵。

该器件具有独立的关断控制,简化上电及断电排序设计。为了防止启动时的电流尖峰,内部电压在1ms周期内从零缓慢上升到最终目标电压。为了防止关断时输出端出现振铃使电压达到地电位以下,内部电压在1ms内从先前电压缓慢下降至零。两个独立的电源就绪输出简化了与外部控制器的接口。

MAX17020与MAX8778引脚兼容。
MAX17020:引脚配置 MAX17020:引脚配置 放大+

关键特性

  • 双路Quick-PWM
  • 内置100mA、5V或可调输出线性稳压器
  • 独立的LDO旁路输入
  • 内部自举二极管
  • 次级反馈输入保持电荷泵工作
  • 3.3V、5mA RTC供电电源(常开)
  • OUT1:5V或1.5V固定输出或0.7V可调反馈
  • OUT2:3.3V或1.05V固定输出或动态调节
  • 次级SMPS上0V至2V REFIN2动态输入
  • 2V ±1%、50µA基准
  • 6V至24V输入电压范围(28V,最大值)
  • 超声模式
  • 独立的SMPS及LDO使能控制
  • 独立的SMPS电源就绪输出
  • 所需元件数最少

应用

  • DDR1、DDR2、DDR3电源
  • 游戏控制台
  • 图形卡
  • I/O系统电源(1.5V和1.05V电源)
  • 低功耗I/O和芯片组电源
  • 主系统电源(5V和3.3V电源)
  • 笔记本电脑
  • PDA与移动通信
  • 电信
  • 2至4节Li+电池供电产品
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)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX17020 62405.5
1.05
1.5
3.3
5
Dyn. REF In
Preset
Resistor
10ExternalYesYes2500
TQFN/32
$2.32 @1k
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。


MAX17020EVKIT: MAX17020评估板

质量和环境数据

产品可靠性报告: MAX17020.pdf 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX17020ETJ+
  • MAX17020ETJ+CCM
  • MAX17020ETJ+T
  • MAX17020ETJ+TCCM
  • 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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