主页 电源管理 电源开关 负载开关

TPS22946

正在供货

具有可选电流限制 5.5V、0.15A、400mΩ 负载开关

产品详情

Number of channels 1 Vin (min) (V) 1.62 Vin (max) (V) 5.5 Imax (A) 0.235 Ron (typ) (mΩ) 400 Shutdown current (ISD) (typ) (µA) 0.1 Quiescent current (Iq) (typ) (µA) 1.3 Soft start Fixed Rise Time Current limit type Adjustable Features Thermal shutdown Rating Catalog Operating temperature range (°C) -40 to 85 FET Internal Device type Load switches Function Thermal shutdown
Number of channels 1 Vin (min) (V) 1.62 Vin (max) (V) 5.5 Imax (A) 0.235 Ron (typ) (mΩ) 400 Shutdown current (ISD) (typ) (µA) 0.1 Quiescent current (Iq) (typ) (µA) 1.3 Soft start Fixed Rise Time Current limit type Adjustable Features Thermal shutdown Rating Catalog Operating temperature range (°C) -40 to 85 FET Internal Device type Load switches Function Thermal shutdown
DSBGA (YZP) 6 2.1875 mm² 1.75 x 1.25
  • Ultralow Quiescent Current 1 µA (Typical)
    at VIN = 1.8 V
  • Input Voltage Range: 1.62 V to 5.5 V
  • Low ON-Resistance
    • rON = 300 mΩ at VIN = 5.5 V
    • rON = 400 mΩ at VIN = 3.3 V
    • rON = 500 mΩ at VIN = 2.5 V
    • rON = 600 mΩ at VIN = 1.8 V
  • Selectable Minimum Current Limit:
    155 mA, 70 mA, or 30 mA
  • Integrated Inrush Current Time-out (8 ms)
  • Shutdown Current: < 1 µA
  • Thermal Shutdown
  • Fault Blanking
  • Auto Restart
  • Overcurrent Condition Time-out (Automatic
    Disable for Permanent Overcurrent)
  • 1.8-V Compatible Control Input
  • ESD Performance Tested Per JESD 22
    • 6000-V Human-Body Model
      (A114-B, Class II)
  • Tiny DSGBA Package 1.4 mm × 0.9 mm (YZP)
  • Ultralow Quiescent Current 1 µA (Typical)
    at VIN = 1.8 V
  • Input Voltage Range: 1.62 V to 5.5 V
  • Low ON-Resistance
    • rON = 300 mΩ at VIN = 5.5 V
    • rON = 400 mΩ at VIN = 3.3 V
    • rON = 500 mΩ at VIN = 2.5 V
    • rON = 600 mΩ at VIN = 1.8 V
  • Selectable Minimum Current Limit:
    155 mA, 70 mA, or 30 mA
  • Integrated Inrush Current Time-out (8 ms)
  • Shutdown Current: < 1 µA
  • Thermal Shutdown
  • Fault Blanking
  • Auto Restart
  • Overcurrent Condition Time-out (Automatic
    Disable for Permanent Overcurrent)
  • 1.8-V Compatible Control Input
  • ESD Performance Tested Per JESD 22
    • 6000-V Human-Body Model
      (A114-B, Class II)
  • Tiny DSGBA Package 1.4 mm × 0.9 mm (YZP)

The TPS22946 is an ultralow power load switch that provides protection to systems and loads in high-current conditions. The device contains a 300-mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. The switch is controlled by an on/off input (ON), which can interface directly with low-voltage control signals. The TPS22946 includes thermal shutdown protection that prevents damage to the device when a continuous over-current condition causes excessive heating by turning off the switch.

When the switch current reaches the maximum limit, the TPS22946 operates in a constant-current mode to prohibit excessive currents from causing damage. The current limit can be selected using the CL input: a high CL input sets the current limit to 155 mA, a low CL input sets the current limit to 70 mA, and a floating CL input sets the current limit to 30 mA.

If the constant current condition persists after 10 ms, the switch is turned off and the fault signal pin (OC) is pulled low. The TPS22946 has an auto-restart feature which turns the switch on again after 70 ms if the ON pin is still active. If the TPS22946 remains in an over-current condition for 5 seconds, the device shuts off until it is turned on again by setting the ON control signal off and then on.

If the device is used to protect an LDO, the inrush current required by the LDO at startup can, in some cases, exceed the current limit and initiate a blanking (current limiting) condition. The TPS22946 provides allowance for this scenario during startup of the LDO by temporarily increasing the current limit to 435 mA for 8 ms after the load switch is enabled.

The TPS22946 is available in space-saving 6-pin DSBGA (YZP) package. The device is characterized for operation over the free-air temperature range of –40°C to 85°C.

The TPS22946 is an ultralow power load switch that provides protection to systems and loads in high-current conditions. The device contains a 300-mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. The switch is controlled by an on/off input (ON), which can interface directly with low-voltage control signals. The TPS22946 includes thermal shutdown protection that prevents damage to the device when a continuous over-current condition causes excessive heating by turning off the switch.

When the switch current reaches the maximum limit, the TPS22946 operates in a constant-current mode to prohibit excessive currents from causing damage. The current limit can be selected using the CL input: a high CL input sets the current limit to 155 mA, a low CL input sets the current limit to 70 mA, and a floating CL input sets the current limit to 30 mA.

If the constant current condition persists after 10 ms, the switch is turned off and the fault signal pin (OC) is pulled low. The TPS22946 has an auto-restart feature which turns the switch on again after 70 ms if the ON pin is still active. If the TPS22946 remains in an over-current condition for 5 seconds, the device shuts off until it is turned on again by setting the ON control signal off and then on.

If the device is used to protect an LDO, the inrush current required by the LDO at startup can, in some cases, exceed the current limit and initiate a blanking (current limiting) condition. The TPS22946 provides allowance for this scenario during startup of the LDO by temporarily increasing the current limit to 435 mA for 8 ms after the load switch is enabled.

The TPS22946 is available in space-saving 6-pin DSBGA (YZP) package. The device is characterized for operation over the free-air temperature range of –40°C to 85°C.

下载 观看带字幕的视频 视频

您可能感兴趣的相似产品

open-in-new 比较替代产品
功能与比较器件相同,但引脚排列有所不同
TPS22950 正在供货 具有可调节电流限制的 5.5V、2A、40mΩ 负载开关 Same functionality with better parametrics

技术文档

star =有关此产品的 TI 精选热门文档
未找到结果。请清除搜索并重试。
查看全部 9
类型 标题 下载最新的英语版本 日期
* 数据表 TPS22946 Ultralow Power, Low Input Voltage, Current-Limited Load Switch With Shutoff, Auto-Restart, and Overcurrent Condition Time-Out 数据表 (Rev. B) PDF | HTML 2015年 4月 8日
应用手册 Load Switch Thermal Considerations (Rev. A) 2018年 10月 11日
应用手册 Basics of Load Switches (Rev. A) 2018年 9月 5日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
应用手册 Basics of eFuses (Rev. A) 2018年 4月 5日
技术文章 How to use load switches to power your wearable PDF | HTML 2015年 10月 19日
应用手册 负载开关:什么是负载开关,为什么需要负载开关,如何选择正确的负载开关? 最新英语版本 (Rev.A) 2014年 8月 11日
EVM 用户指南 Using the TPS22946EVM-499 Single Channel Load Switch IC 2013年 2月 26日

设计和开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

评估板

TPS22946EVM-499 — TPS22946 限流负载开关评估模块

借助 TPS22946EVM-499 评估模块 (EVM),用户能够将电源连接到采用超小型 CSP-6 封装的 TPS22946 负载开关并对其进行控制。可轻松地对导通电阻、压摆率和限流属性等参数进行评估。

用户指南: PDF
TI.com 上无现货
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
参考设计

TIDA-010019 — 针对温度传感器中冷端补偿参考设计的 RTD 替代

使用热电偶 (TC) 的温度检测应用需要高精度本地温度传感器来实现高精度。在此参考设计中,突出显示并说明了针对诸如冷端补偿 (CJC) 或包含超低功耗 TC 模拟前端等设计难题的解决方案。对高精度 4mA 至 20mA 传感器的功耗性能和精度性能进行了优化,同时还展示了不同 CJC 和 TC 前端实现的性能。
设计指南: PDF
原理图: PDF
参考设计

TIDA-010008 — 用于针对电网应用提供瞬态保护且基于平缓钳位 TVS 的参考设计

该参考设计采用多种方法,使用平缓钳位浪涌保护措施、ESD 器件、电子保险丝或负载开关,来保护交流或直流模拟输入、直流模拟输出、交流或直流二进制输入、带高侧或低侧驱动器的数字输出、LCD 偏置电源、USB 接口(电源和数据)和具有 24、12 或 5V 输入的板载电源(用于多个电网应用),使其免受过压、过载和瞬变(1.2/50us,42Ω)的影响。该设计监测温度、湿度、磁场和电源以进行诊断。
设计指南: PDF
原理图: PDF
封装 引脚 CAD 符号、封装和 3D 模型
DSBGA (YZP) 6 Ultra Librarian

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。

支持和培训

视频