MAX17031

双通道Quick-PWM、降压型控制器,具有低功耗LDO和RTC电源,用于主电源

高度集成并完全符合笔记本电脑主电源的要求


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说明

MAX17031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。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 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。SKIP输入还具有精确的逻辑门限,可用作次级反馈输入,刷新外部电荷泵或第二绕组,从而不会产生输出电压过冲。

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5V SMPS启动时,独立的旁路输入可以自动旁路线性稳压器。

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。MAX17031采用无铅、24引脚薄型QFN (4mm x 4mm)封装。
MAX17031:功能框图 MAX17031:功能框图 放大+

关键特性

  • 双路Quick-PWM
  • 预设5V和3.3V输出
  • 内置100mA 5V线性稳压器
  • 内置OUT1 LDO5旁路开关
  • 次级反馈输入保持电荷泵工作
  • 3.3V 5mA实时时钟(RTC)供电电源(常开)
  • 2V ±1% 50µA基准
  • 输入范围为6V至24V
  • 跳脉冲/强制PWM/超声模式控制
  • 独立的SMPS及LDO5使能控制
  • 独立的SMPS电源就绪输出
  • 所需元件数最少

应用

  • 2节至4节Li+电池供电设备
  • 主系统电源(5V和3.3V电源)
  • 笔记本电脑
  • 电信
  • 超便携移动PC
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
MAX17031 6243.35
3.3
5
Preset10ExternalYesYes2300
TQFN/24
$4.09 @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。

质量和环境数据

申请可靠性报告: MAX17031 
无铅封装的锡(Sn)晶须报告
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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