MAX17003A

高效率、四路输出、主电源控制器,用于笔记本电脑

经过优化的错相、固定频率工作方式,在最低输入电压至26V最高输入电压范围内可保持最小输入纹波电流


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说明

MAX17003A/MAX17004A是双路降压型、同步整流的开关电源(SMPS)控制器,用于在电池供电系统中产生5V/3.3V主电源。在最低至最高 26V的电压输入范围内,固定频率和优化交错的工作模式将输入纹波电流降至最低。优化的40/60交错控制使输入电压在降至8.3V时不会发生占空比交迭,而使用180°错相工作的调节器在输入降至10V时就会出现占空比交迭。

输出电流检测提供峰值限流保护,可使用精密的检流电阻或无损耗电感DCR进行电流检测。低噪声模式能够在轻载下保持较高的效率,并使开关频率在音频范围以外。

内部5V、100mA固定输出线性稳压器为MAX17003A/MAX17004A、其栅极驱动器以及外部始终保持工作状态的负载供电。当主PWM调节器工作稳定时,自举开关自动旁路内部线性稳压器,可提供最大200mA的电流。另外一路线性稳压驱动器配合外部pnp晶体管和次级绕组能够提供12V电源,也可以直接从主电源产生低至1V的低压输出。

独立的使能控制和电源就绪信号允许灵活的电源排序。电压软启动逐步提高输出电压,以降低浪涌电流;而软关断则逐步降低输出电压,防止出现负电压。MAX17003A/MAX17004A具有输出欠压和热故障保护,MAX17003A还提供输出过压故障保护功能。

MAX17003A/MAX17004A采用32引脚5mm x 5mm、薄型QFN封装。在需要不间断供电的应用中,背部裸焊盘有助于改善散热。
MAX17003A、MAX17004A:标准应用电路 MAX17003A、MAX17004A:标准应用电路 放大+

关键特性

  • 固定频率、电流模式控制
  • 优化的40/60交错工作
  • 内部BST开关
  • 内部5V、100mA线性稳压器
  • 辅助线性稳压驱动器(12V或可调整为低至1V)
  • Dual Mode™反馈—3.3V/5V固定或可调输出电压
  • 200kHz/300kHz/500kHz开关频率
  • 欠压和热故障保护
  • 过压故障保护(MAX17003 A)
  • 输入范围:6V至26V
  • 2V ±0.75%基准输出
  • 独立的使能输入和电源就绪输出
  • 软启动和软关断(电压线性上升/下降)
  • 关断电流:8µA (典型值)

应用

  • 2节至4节Li+电池供电设备
  • 主电源
  • 笔记本电脑和亚笔记本电脑
  • PDA与移动通信
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingDC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX17003A 5.52625.5
3.3
5
Preset
Resistor
6ExternalYes2500
TQFN/32
$3.68 @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

产品可靠性报告: MAX17003A.pdf 
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。

质量管理体系 >
环境管理体系 >

 
Status:
Package:
Temperature:

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