MAX668

1.8V至28V输入、PWM升压型控制器,µMAX封装

灵活的转换架构提供升压、SEPIC、反激或隔离拓扑,MAX668输出电压仅受外部元件额定值的限制


点击查看特定型号的库存状况。

说明

MAX668/MAX669固定频率、脉宽调制(PWM)、电流模式DC-DC控制器设计用于较宽范围输入的DC-DC转换应用,包括升压、SEPIC、反激和隔离输出结构。可输出20W或更高功率,转换效率高于90%。1.8V至28V输入电压范围支持较宽范围的电池或交流供电输入。先进的BiCMOS设计具有低工作电流(220µA)、可调节工作频率(100kHz至500kHz)、软启动,同步输入允许MAX668/MAX669振荡器与外部时钟同步。

DC-DC转换效率经过优化,具有100mV低电流检测电压,以及Maxim专有的Idle Mode™控制方法。中、高负载时,控制器工作在PWM模式,具有最低噪声和最优效率,只有在轻载条件下利用脉冲模式(较小电感电流)减小工作电流、最大程度提高效率。器件也包括逻辑电平关断输入,将供电电流降低至3.5µA。

MAX669优化用于低输入电压,可保证启动电压为1.8V,要求自举操作(IC由升压输出供电)。器件支持高达28V的输出电压。MAX668采用低至3V的输入电压工作,可连接为自举或非自举(IC由输入电源或其它电源供电)配置。非自举配置时,对输出电压无限制。两款IC采用尺寸非常小巧的10引脚µMAX®封装。
MAX668、MAX669:典型工作电路 MAX668、MAX669:典型工作电路 放大+

关键特性

  • 1.8V最小启动电压(MAX669)
  • 宽输入电压范围:1.8V至28V
  • 小尺寸10引脚µMAX封装
  • 电流模式PWM和空闲工作模式
  • 效率高于90%
  • 100kHz至500kHz可调节振荡器或SYNC输入
  • 220µA静态电流
  • 逻辑电平关断
  • 软启动

应用

  • 蜂窝电话
  • LAN与网络系统
  • POS系统
  • 电信硬件
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX668 32831006ResistorExternal0.223.561500
UMAX/10
$2.45 @1k
MAX669 1.828
UMAX/10
查看所有Step-Up Switching Regulators (98)
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。


MAX668EVKIT: MAX668、MAX669评估板

技术资料

用户指南 5861 EE-SIM Design and Simulation Environment User Guide
小系统板 5509 Oceanside (MAXREFDES9#): 3.3V to 15V Input, ±15V (±12V) Output, Isolated Power Supply
设计指南 4992 Reduce the Chances of Human Error: Part 1, Power and Ground
应用笔记 4834 Negative-to-Negative Switch-Mode Converter Offers High Current and High Efficiency
应用笔记 4495 用电流检测放大器替代高共模仪表放大器
应用笔记 3943 ±15V or ±12V Output Switch-Mode Power Supply Has Wide Input-Voltage Range
应用笔记 2631 从PCI总线的-12V电压获得3.3V电压
设计指南 2031 DC to DC Buck Converter Tutorial
应用笔记 1161 Current Limited DC-DC Controller Used as Step-Up Step-Down SEPIC Power Supply for USB Devices
应用笔记 1115 Isolated SLIC supply
设计指南 1109 输出高压的小型升压转换器
应用笔记 945 Step-Up Controller Forms Negative Step-Down Regulator
应用笔记 911 High-Efficiency Boost Converter Provides 48V for IP Phones
应用笔记 910 High-Efficiency Boost Converter Provides 24V for DTE
应用笔记 907 R-C Snubbing for the Lab
应用笔记 904 SLIC Power-Supply Design
设计指南 735 Layout Considerations for Non-Isolated DC-DC Converters
设计指南 716 正确的布局和元件选择是控制EMI的关键
应用笔记 621 Simple Circuit Charges Lead-Acid Batteries
应用笔记 529 15V Input Converter Generates -185V at 50mA
应用笔记 471 Step-up Converter with LDO Beats SEPIC Efficiency
应用笔记 436 Extending Soft-Start
应用笔记 435 +12V Input Converter Generates -165V at 100mA
应用笔记 433 5V Input Converter Generates -30V at 80mA
应用笔记 296 3.3V Supply Taps Power from the -12V PCI Bus
应用笔记 294 Dual-Output SLIC Supply Shares Feedback

质量和环境数据

产品可靠性报告: MAX668.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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    类型 编号 PDF 标题
    用户指南 5861 EE-SIM Design and Simulation Environment User Guide
    小系统板 5509 Oceanside (MAXREFDES9#): 3.3V to 15V Input, ±15V (±12V) Output, Isolated Power Supply
    设计指南 4992 Reduce the Chances of Human Error: Part 1, Power and Ground
    应用笔记 4834 Negative-to-Negative Switch-Mode Converter Offers High Current and High Efficiency
    应用笔记 4495 用电流检测放大器替代高共模仪表放大器
    应用笔记 3943 ±15V or ±12V Output Switch-Mode Power Supply Has Wide Input-Voltage Range
    应用笔记 2631 从PCI总线的-12V电压获得3.3V电压
    设计指南 2031 DC to DC Buck Converter Tutorial
    应用笔记 1161 Current Limited DC-DC Controller Used as Step-Up Step-Down SEPIC Power Supply for USB Devices
    应用笔记 1115 Isolated SLIC supply
    设计指南 1109 输出高压的小型升压转换器
    应用笔记 945 Step-Up Controller Forms Negative Step-Down Regulator
    应用笔记 911 High-Efficiency Boost Converter Provides 48V for IP Phones
    应用笔记 910 High-Efficiency Boost Converter Provides 24V for DTE
    应用笔记 907 R-C Snubbing for the Lab
    应用笔记 904 SLIC Power-Supply Design
    设计指南 735 Layout Considerations for Non-Isolated DC-DC Converters
    设计指南 716 正确的布局和元件选择是控制EMI的关键
    应用笔记 621 Simple Circuit Charges Lead-Acid Batteries
    应用笔记 529 15V Input Converter Generates -185V at 50mA
    应用笔记 471 Step-up Converter with LDO Beats SEPIC Efficiency
    应用笔记 436 Extending Soft-Start
    应用笔记 435 +12V Input Converter Generates -165V at 100mA
    应用笔记 433 5V Input Converter Generates -30V at 80mA
    应用笔记 296 3.3V Supply Taps Power from the -12V PCI Bus
    应用笔记 294 Dual-Output SLIC Supply Shares Feedback