MAX1541

双路、降压型控制器,带有电感饱和保护、动态输出和线性稳压器

双路、Quick-PWM™、降压型控制器,提供饱和保护和动态输出电压


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说明

MAX1540A/MAX1541为双路脉宽调制(PWM)控制器,具有高转换效率、出色的瞬态响应及高直流输出精度的特性,能够满足降低高压电池电压,以产生笔记本电脑中低压芯片组和RAM的供电电源。

Maxim独特的Quick-PWM™控制器具有自由运行,固定导通时间和输入前馈等特点。该结构能够提供超高速瞬态响应、宽输入-输出(I/O)电压差、低电源电流及严格的负载调整等特性。该控制器通过与输出串联的外部电流检测电阻提供精确的电感电流测量,以保证可靠的过载和电感饱和保护。此外,该控制器还能够利用同步整流器自身,即无损耗电感电流检测方法,以提供更低功耗的过载保护。

如需带有电感饱和保护、外部基准输入电压和输出电压动态可选等特性的单路降压型PWM控制器,请参考MAX1992/MAX1993数据资料。
MAX1540A、MAX1541:功能框图 MAX1540A、MAX1541:功能框图 放大+

关键特性

  • 电感饱和保护
  • 精确的差分电流检测输入
  • 双路超高转换效率的Quick-PWM,具有100ns的负载阶跃响应
  • MAX1540A
    • 1.8V/1.2V固定电压或0.7V至5.5V的可调输出(OUT1)
    • 2.5V/1.5V固定电压或0.7V至5.5V的可调输出(OUT2)
    • 固定的5V、100mA线性稳压器
  • MAX1541
    • 外部基准输入(REFIN1)
    • 动态可选的0.7V至5.5V输出电压(OUT1)
    • 2.5V/1.8V固定或0.7V至5.5V的可调输出(OUT2)
    • 可选的电源就绪指示,及瞬变期间的故障屏蔽
    • 固定5V或可调的100mA线性稳压器
  • 在整个电源输入和负载范围内,具有1%的VOUT精度
  • 2V至28V电池电压输入范围
  • 170kHz至620kHz可选择的开关频率
  • 过压/欠压保护选择
  • 1.7ms数字软启动
  • 驱动大功率同步整流器FET
  • 2V ±0.7%基准输出
  • 独立的电源就绪区间比较器

应用

  • 0.7V至5.5V电源
  • 有源端接总线(MAX1541)
  • 核/IO电源,可低至0.7V
  • 具有动态电压核的CPU/芯片组/GPU
  • DDR存储器端接(MAX1541)
  • 笔记本电脑
  • 电源(MAX1541)
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
MAX1540A 2280.75.5
1.2
1.5
1.8
2.5
Resistor5ExternalYesYes2
200
300
400
500
TQFN/32
$4.19 @1k
MAX1541 
1.8
2.5
7
TQFN/40
$4.57 @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: MAX1541.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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