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LTC3388的基本参数
  • 制造厂商:AD
  • 产品类别:能量收集
  • 技术类目:内部电源开关降压稳压器
  • 功能描述:20V、高效率、毫微功率降压型稳压器
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LTC3388的产品详情:

LTC3388-1 / LTC3388-3 是具内部高端和同步电源开关的高效率、降压型 DC/DC 转换器,该器件在无负载时仅吸收 720nA (典型值) 的 DC 电源电流,并保持了输出电压调节作用。

LTC3388-1 / LTC3388-3 能够提供 50mA 的负载电流,而且还具有一种欠压闭锁 (UVLO) 功能,用于在输入电压降至 2.3V 以下时停用转换器并保持一种低静态电流状态。在调节状态中,LTC3388-1 / LTC3388-3 将进入睡眠模式,在该模式中,输入和输出静态电流均非常小。降压型转换器根据需要接通和关断,以保持稳压作用。对于要求低纹波的短持续时间负载,附加的待机模式将禁止执行降压开关操作,而同时输出则处于调节状态。

可通过引脚来选择 1.2V、1.5V、1.8V、2.5V (LTC3388-1) 和 2.8V、3.0V、3.3V、5.0V (LTC3388-3) 的输出电压。LTC3388-1 / LTC3388-3 可在 VIN 高达 20V 的条件下运作,而无负载静态电流则保持在 1μA 以下。


Applications

  • 便携式产品的保活电源
  • 工业控制电源
  • 分布式电源系统
  • 电池供电式设备
LTC3388的优势和特点:
  • 在调节状态中输入 IQ 为 720nA (无负载,VIN = 4V)
  • 在调节状态中输入 IQ 为 820nA (无负载,VIN = 20V)
  • 在 UVLO 状态中输入 IQ 为 400nA
  • 2.7V 至 20V 输入工作电压范围
  • 输出电流高达 50mA
  • 可通过引脚来选择的输出电压:
    • 1.2V、1.5V、1.8V、2.5V (LTC3388-1)
    • 2.8V、3.0V、3.3V、5.0V (LTC3388-3)
  • 高效率迟滞同步 DC/DC 转换
  • 待机模式可禁止执行降压开关操作
  • 采用 10 引脚 MSE 封装和 3mm x 3mm DFN 封装
LTC3388具体的完整产品型号参数及价格(美元):

LTC3388EDD-1#PBF,封装:10-Lead DFN (3mm x 3mm w/ EP),包装形式及数量:管装,121,工作温度:-40 to 125C,AD官网报价:4.05(100-499个);3.31(1000+个)

LTC3388EDD-1#TRPBF,封装:10-Lead DFN (3mm x 3mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:4.05(100-499个);3.31(1000+个)

LTC3388EDD-3#PBF,封装:10-Lead DFN (3mm x 3mm w/ EP),包装形式及数量:管装,121,工作温度:-40 to 125C,AD官网报价:4.05(100-499个);3.31(1000+个)

LTC3388EDD-3#TRPBF,封装:10-Lead DFN (3mm x 3mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:4.05(100-499个);3.31(1000+个)

LTC3388EMSE-1#PBF,封装:10-Lead MSOP w/ EP,包装形式及数量:管装,50,工作温度:-40 to 125C,AD官网报价:4.05(100-499个);3.31(1000+个)

LTC3388EMSE-1#TRPBF,封装:10-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:4.05(100-499个);3.31(1000+个)

LTC3388EMSE-3#PBF,封装:10-Lead MSOP w/ EP,包装形式及数量:管装,50,工作温度:-40 to 125C,AD官网报价:4.05(100-499个);3.31(1000+个)

LTC3388EMSE-3#TRPBF,封装:10-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:4.05(100-499个);3.31(1000+个)

LTC3388IDD-1#PBF,封装:10-Lead DFN (3mm x 3mm w/ EP),包装形式及数量:管装,121,工作温度:-40 to 125C,AD官网报价:4.74(100-499个);3.88(1000+个)

LTC3388IDD-1#TRPBF,封装:10-Lead DFN (3mm x 3mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:4.74(100-499个);3.88(1000+个)

LTC3388IDD-3#PBF,封装:10-Lead DFN (3mm x 3mm w/ EP),包装形式及数量:管装,121,工作温度:-40 to 125C,AD官网报价:4.74(100-499个);3.88(1000+个)

LTC3388IDD-3#TRPBF,封装:10-Lead DFN (3mm x 3mm w/ EP),包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:4.74(100-499个);3.88(1000+个)

LTC3388IMSE-1#PBF,封装:10-Lead MSOP w/ EP,包装形式及数量:管装,50,工作温度:-40 to 125C,AD官网报价:4.74(100-499个);3.88(1000+个)

LTC3388IMSE-1#TRPBF,封装:10-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:4.74(100-499个);3.88(1000+个)

LTC3388IMSE-3#PBF,封装:10-Lead MSOP w/ EP,包装形式及数量:管装,50,工作温度:-40 to 125C,AD官网报价:4.74(100-499个);3.88(1000+个)

LTC3388IMSE-3#TRPBF,封装:10-Lead MSOP w/ EP,包装形式及数量:卷带,2500,工作温度:-40 to 125C,AD官网报价:4.74(100-499个);3.88(1000+个)

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LTC3388的评估套件:

DC1658A-A:LTC3388EMSE-1 Demo Board | 2.7V ≤ VIN ≤ 20V, VOUT = 1.2V to 2.5V @ 50mA

Demonstration Circuit DC1658A is a 20V High Efficiency Nanopower Step-Down Regulator featuring the LTC3388-1/ LTC3388-3. The LTC3388 is an ultralow quiescent current power supply designed to regulate the output voltage by means of a nanopower high efficiency synchronous buck regulator. The input current is only 720nA typical at no load while maintaining output voltage regulation, capable of supplying 50mA of load current. The LTC3388-1/ LTC3388-3 also incorporates an accurate undervoltage lockout feature to disable the converter and maintain a low quiescent current state when the input voltage falls below 2.3V. In regulation, the LTC3388-1/LTC3388-3 enter a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation. An additional standby mode disables the buck switching while the output is in regulation for short duration loads requiring low ripple.




DC1658A-B:LTC3388EMSE-3 Demo Board | 2.8V ≤ VIN ≤ 20V, VOUT = 2.8V to 5V @ 50mA

Demonstration Circuit DC1658A is a 20V High Efficiency Nanopower Step-Down Regulator featuring the LTC3388-1/ LTC3388-3. The LTC3388 is an ultralow quiescent current power supply designed to regulate the output voltage by means of a nanopower high efficiency synchronous buck regulator. The input current is only 720nA typical at no load while maintaining output voltage regulation, capable of supplying 50mA of load current. The LTC3388-1/ LTC3388-3 also in-corporates an accurate undervoltage lockout feature to disable the converter and maintain a low quiescent current state when the input voltage falls below 2.3V. In regulation, the LTC3388-1/LTC3388-3 enter a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation. An additional standby mode disables the buck switching while the output is in regulation for short duration loads requiring low ripple.

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