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TPS22951

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具有电流限制和电源正常指示功能的 5.3V、0.3A、565mΩ 负载开关

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TPS22951

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产品详情

Number of channels 1 Vin (min) (V) 2.8 Vin (max) (V) 5.3 Imax (A) 0.6 Ron (typ) (mΩ) 565 Shutdown current (ISD) (typ) (µA) 1 Quiescent current (Iq) (typ) (µA) 100 Soft start Fixed Rise Time Current limit type Fixed Features Power good signal, Short circuit protection, Thermal shutdown Rating Catalog Operating temperature range (°C) -40 to 85 FET Internal Device type Load switches Function Power good signal, Short circuit protection, Thermal shutdown
Number of channels 1 Vin (min) (V) 2.8 Vin (max) (V) 5.3 Imax (A) 0.6 Ron (typ) (mΩ) 565 Shutdown current (ISD) (typ) (µA) 1 Quiescent current (Iq) (typ) (µA) 100 Soft start Fixed Rise Time Current limit type Fixed Features Power good signal, Short circuit protection, Thermal shutdown Rating Catalog Operating temperature range (°C) -40 to 85 FET Internal Device type Load switches Function Power good signal, Short circuit protection, Thermal shutdown
DSBGA (YFP) 6 1.4000000000000001 mm² 1 x 1.4000000000000001
  • 1-Ω P-Channel MOSFET
  • 300-mA Continuous Source Current
  • Thermal and Short-Circuit Protection
  • 600-mA Current Limit
  • Operating Range: VCC = 2.8 V to 5.3 V
  • 41-µs Typical Rise Time
  • 10-µA Maximum Standby Supply Current
  • Ambient Temperature Range: –40°C to +85°C
  • ESD Performance Tested Per JESD 22
    • 4000-V Human-Body Model (HBM)
    • 400-V Machine Model (MM)
    • 1000-V Charged-Device Model (CDM)
  • 1-Ω P-Channel MOSFET
  • 300-mA Continuous Source Current
  • Thermal and Short-Circuit Protection
  • 600-mA Current Limit
  • Operating Range: VCC = 2.8 V to 5.3 V
  • 41-µs Typical Rise Time
  • 10-µA Maximum Standby Supply Current
  • Ambient Temperature Range: –40°C to +85°C
  • ESD Performance Tested Per JESD 22
    • 4000-V Human-Body Model (HBM)
    • 400-V Machine Model (MM)
    • 1000-V Charged-Device Model (CDM)

The TPS22951 smart-load switch is intended for applications where heavy capacitive loads and short circuits are likely to be encountered. This device incorporates a 1-Ω P-channel MOSFET power switch for power distribution. The switch is controlled by a logic enable (EN) input and an accessory detect (DET) pin. The switch is active when EN is high and DET is low. The switch is disabled if EN is low or DET is high. A low power state is achieved by driving EN low.

When the output load exceeds the current-limit threshold or a short is present, the device limits the output current to a safe level by increasing the on resistance of the power switch. When continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal-protection circuit shuts off the switch to prevent damage. The device recovers from a thermal shutdown once the device has cooled sufficiently, but the switch remains OFF until EN is toggled. This smart-load switch is designed to set current limit at 600 mA maximum.

The TPS22951 smart-load switch is intended for applications where heavy capacitive loads and short circuits are likely to be encountered. This device incorporates a 1-Ω P-channel MOSFET power switch for power distribution. The switch is controlled by a logic enable (EN) input and an accessory detect (DET) pin. The switch is active when EN is high and DET is low. The switch is disabled if EN is low or DET is high. A low power state is achieved by driving EN low.

When the output load exceeds the current-limit threshold or a short is present, the device limits the output current to a safe level by increasing the on resistance of the power switch. When continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal-protection circuit shuts off the switch to prevent damage. The device recovers from a thermal shutdown once the device has cooled sufficiently, but the switch remains OFF until EN is toggled. This smart-load switch is designed to set current limit at 600 mA maximum.
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类型 标题 下载最新的英语版本 日期
* 数据表 TPS22951 Current-Limited 1-Ω Smart-Load Switch 数据表 (Rev. D) PDF | HTML 2016年 10月 26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
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

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