MAX77278

超低功耗PMIC,带有3路输出SIMO、优化用于小型Li+电池的电源路径充电器、425mA流入电流源和8路GPIO

超低功耗PMIC,带有3路输出SIMO、优化用于小型Li+电池的电源路径充电器、425mA流入电流源和8路GPIO


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说明

MAX77278提供高度集成电池充电和电源方案,用于尺寸和效率至关重要的低功耗应用。器件具有单电感多输出(SIMO)升/降压调节器,提供三路独立可编程电源轨,采用单电感,最大程度减小方案尺寸。50mA LDO提供纹波抑制,适用于音频和其它噪声敏感的应用。高度可配置的线性充电器支持较宽范围的Li+电池容量,包括电池温度监测,进一步提高安全性(JEITA)。

器件也包括其他特性,例如可编程流入电流源(可用于驱动IR-LED)、8路通用输入/输出(GPIO)控制引脚,以及用于访问有用电池充电信号的模拟多路复用(AMUX)输出。双向I2C接口允许配置和检查器件的状态。内部开/关控制器为调节器提供受控的启动顺序,并为器件打开时提供监控功能。丰富的工厂可编程选项允许针对众多应用定制器件,支持较快的上市时间。
MAX77278:Simplified Application Circuit MAX77278: Simplified Application Circuit 放大+

关键特性

  • 高度集成
    • 智能电源选择器Li+/Li-Poly充电器
    • 3路输出,SIMO升/降压调节器
    • 50mA LDO与SIMO固定空间控制
    • 可编程250mA至425mA电流驱动
    • 模拟MUX输出,用于电源监测
    • 8路GPIO (可配置为一键唤醒和两键关断)
  • 低功耗
    • 0.3µA待机电流
    • 16µA工作电流
  • 充电器优化用于小尺寸电池
    • 可编程快充电流:7.5mA至300mA
    • 可编程电池调节电压:3.6V至4.6V
    • 可编程终止电流:0.375mA至45mA
    • JEITA电池温度监测器调节充电电流和电池调节电压,实现安全充电
  • 高度灵活性和可配置
    • I2C兼容接口
    • 8路GPIO
    • 提供工厂OTP选项
  • 小尺寸
    • 3.15mm x 2.15mm x 0.7mm
    • 35焊球、0.4mm焊距、7x5焊球阵列、WLP封装
    • 总体方案尺寸较小(24mm2)

应用

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Part NumberLithium Ion CellsProtected VIN
(V)
Charging VIN
(V)
Charge Rate Set byMax. ICHG
(A)
Charge TerminationCharge RegulationOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxmaxSee Notes
MAX77278 17.257.25I2C/SMBus0.475
End of Charge Termination Current Accuracy
Smart Battery Control
Timer
Linear
-40 to +85
0 to +85
See Data Sheet
$2.18 @1k
查看所有Battery Chargers (74)

Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesBattery Charger FeaturesInterface TypeVIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Max. IOUT
(A)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX77278 
H-Bridge
Step-Down
Step-Up
Step-Up/Down
Reset Output
Serial Interface
Shutdown
Internal Switch
Single Inductor Multiple Output
Soft Start
Sync. Rectifier
Battery Charger
Charge Timer
Input Current Limit
Smart Pwr. Selector
Thermal Die Regulation
Thermistor Input
GPIO
I2C
2.85.50.855.50.30.3
WLP/35
$2.18 @1k
查看所有Multifunction PMICs (79)
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。


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CAD Symbols and Footprints

  • MAX77278EWB+
  • MAX77278EWB+T
  • 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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