LTC3221

量产

2mm x 2mm DFN 封装的微功率、稳压充电泵

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产品技术资料帮助

ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
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概述

  • 超低功率：8µA 静态电流
  • 稳定的输出电流：3.3V ±4%，5V ±4%，可调 (ADJ)
  • VIN 范围：
    • 2.7V 至 5.5V (LTC3221-5)
    • 1.8V 至 4.4V (LTC3221-3.3)
  • 输出电流：高达 60mA
  • 无需电感器
  • 非常低的停机电流：<1µA
  • 停机功能使负载与 VIN 断接
  • 突发模式控制
  • 短路保护
  • 解决方案高度 < 1mm
  • 纤巧型 2mm x 2mm 6 引脚 DFN 封装

LTC®3221 系列是微功率充电泵 DC/DC 转换器，可在高达 60mA 电流条件下产生一个稳定的输出。输入电压范围为 1.8V 至 5.5V。极低的工作电流 (无负载时的典型值为 8µA) 和低外部组件数 (一个跨接电容器以及 VIN 和 VOUT 上的两个小的旁路电容器) 使得这些器件非常适合小型电池供电式应用。

LTC3221 系列包括固定的 5V 和 3.3V 输出版本以及一款可调版本。所有的器件均充当突发模式 (Burst Mode®) 开关电容电压倍增器以实现超低的静态电流。这些芯片采用一个受控电流以提供输出，并将安然经受从 VOUT 至 GND 的持续短路。可调型 LTC3221 的 FB 引脚可用于设置期望的输出电压。

LTC3221 系列采用扁平 (仅高 0.75mm) 2mm x 2mm 6 引脚 DFN 封装。


Applications

  • 低功率 2 AA 电池至 3.3V 电源
  • 存储器备份电源
  • 轮胎压力传感器
  • 通用型低功率锂离子电池至 5V 电源
  • RF 发送器
  • 血糖仪
LTC3221
2mm x 2mm DFN 封装的微功率、稳压充电泵
No-Load Input Current vs Supply Voltage Product Package 1
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数据手册 1

可靠性数据 1

用户手册 1

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工具及仿真模型

LTspice

LTspice中提供以下器件型号：

  • LTC3221
  • LTC3221-3.3
  • LTC3221-5
LTspice

LTspice®是一款强大高效的免费仿真软件、原理图采集和波形观测器，为改善模拟电路的仿真提供增强功能和模型。

评估套件

eval board
schematic 1
DC862A-B

LTC3221EDC-5 Demo Board | Micropower Regulated Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 5V @ Up to 60mA

立即购买 更多内容

产品详情

Demonstration circuit 862 is a micropower regulated charge pump DC/DC converter featuring the 60mA output LTC3221 in a 2mm × 2mm DFN package. It comes in three assembly versions, DC862A-A, DC862A-B and DC862A-C, featuring the LTC3221EDC-3.3 (fixed 3.3V output), the LTC3221EDC-5 (fixed 5V output) , and LTC3221EDC (adjustable output set to 3V), respectively. The demo board input voltage range depends on the IC used; for the 5V output DC862A-B, the input voltage range is 2.7V to 5.5V.


The LTC3221's low 8µA no-load quiescent current is even lower than the self-discharging current of many batteries. By employing a constant current to charge the output, the output ripple is low even at high input and light load, and is fairly constant over the full input voltage range.

eval board
schematic 2
DC862A-A

LTC3221EDC-3.3 Demo Board | Micropower Regulated Charge Pump, 1.8V ≤ VIN ≤ 4.4V, VOUT = 3.3V @ Up to 60mA

立即购买 更多内容

产品详情

Demonstration circuit 862 is a micropower regulated charge pump DC/DC converter featuring the 60mA output LTC3221 in a 2mmx2mm DFN package. It comes in three assembly versions, DC862A-A, DC862A-B and DC862A-C, featuring the LTC3221EDC-3.3 (fixed 3.3V output), the LTC3221EDC-5 (fixed 5V output) , and LTC3221EDC (adjustable output set to 3V), respectively. The demo board input voltage range depends on the IC used; for the 3.3V output DC862A-A, the input voltage range is 1.8V to 4.4V.


The LTC3221's low 8µA no-load quiescent current is even lower than the self-discharging current of many batteries. By employing a constant current to charge the output, the output ripple is low even at high input and light load, and is fairly constant over the full input voltage range.

eval board
schematic 3
DC862A-C

LTC3221EDC Demo Board | Micropower Regulated Adjustable Output Charge Pump, 1.8V ≤ VIN ≤ 3.8V, VOUT = 3V @ Up to 60mA

立即购买 更多内容

产品详情

Demonstration circuit 862 is a micropower regulated charge pump DC/DC converter featuring the 60mA output LTC3221 in a 2mm × 2mm DFN package. It comes in three assembly versions, DC862A-A, DC862A-B and DC862A-C, featuring the LTC3221EDC-3.3 (fixed 3.3V output), the LTC3221EDC-5 (fixed 5V output) , and LTC3221EDC (adjustable output set to 3V), respectively. The demo board input voltage range depends on the IC used; for the adjustable output DC862A-C, the input voltage range is 1.8V to 3.8V.


The LTC3221's low 8µA no-load quiescent current is even lower than the self-discharging current of many batteries. By employing a constant current to charge the output, the output ripple is low even at high input and light load, and is fairly constant over the full input voltage range.
DC862A-B
LTC3221EDC-5 Demo Board | Micropower Regulated Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VOUT = 5V @ Up to 60mA
DC862A-A - Schematic
DC862A-A
LTC3221EDC-3.3 Demo Board | Micropower Regulated Charge Pump, 1.8V ≤ VIN ≤ 4.4V, VOUT = 3.3V @ Up to 60mA
DC862A-A - Schematic
DC862A-C
LTC3221EDC Demo Board | Micropower Regulated Adjustable Output Charge Pump, 1.8V ≤ VIN ≤ 3.8V, VOUT = 3V @ Up to 60mA
DC862A-A - Schematic

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