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TPS22949

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具有电流限制和 LDO 的 4.5V、0.1A、350mΩ 负载开关

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TPS22949

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数据表 立即订购

产品详情

Number of channels 1, 2 Vin (min) (V) 1.62 Vin (max) (V) 4.5 Imax (A) 0.2 Ron (typ) (mΩ) 350 Shutdown current (ISD) (typ) (µA) 6 Quiescent current (Iq) (typ) (µA) 85 Soft start Fixed Rise Time Current limit type Fixed 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, 2 Vin (min) (V) 1.62 Vin (max) (V) 4.5 Imax (A) 0.2 Ron (typ) (mΩ) 350 Shutdown current (ISD) (typ) (µA) 6 Quiescent current (Iq) (typ) (µA) 85 Soft start Fixed Rise Time Current limit type Fixed Features Thermal shutdown Rating Catalog Operating temperature range (°C) -40 to 85 FET Internal Device type Load switches Function Thermal shutdown
WSON (DRG) 8 9 mm² 3 x 3
  • Integrated Current Limiter
    • Input Voltage Range: 1.62 V to 4.5 V
    • Low ON-Resistance
      • rON = 300-mΩ at VIN = 4.5 V
      • rON = 350-mΩ at VIN = 3.3 V
      • rON = 400-mΩ at VIN = 2.5 V
      • rON = 600-mΩ at VIN = 1.8 V
    • Integrated 100-mA Minimum Current Limit
    • Undervoltage Lockout
    • Fast-Current Limit Response Time
    • Integrated Fault Blanking and Auto Restart
  • Stable Without Current Limiter Output Capacitor
    (TPS22949A Only)
  • Integrated Low-Noise RF LDO
    • Input Voltage Range: 1.62 V to 4.5 V
    • Low Noise: 50 µVrms (10 Hz to 100 kHz)
    • 80-dB VIN PSRR (10 Hz to 10 kHz)
    • Fast Start-Up Time: 130 µs
    • Low Dropout 100 mV at Iload =100 mA
    • Integrated Output Discharge
    • Stable With 2.2-µF Output Capacitor
  • 1.8-V Compatible Control Input Threshold
  • ESD Performance Tested Per JESD 22
    • 3500 V Human Body Model
      (A114-B, Class II)
    • 1000 V Charged Device Model
      (C101)
  • Tiny 8-Terminal YZP Package (1.9 mm × 0.9 mm,
    0.5-mm Pitch, 0.5-mm Height) and WSON-8
    (DRG) 3.0 mm × 3.0 mm
  • Integrated Current Limiter
    • Input Voltage Range: 1.62 V to 4.5 V
    • Low ON-Resistance
      • rON = 300-mΩ at VIN = 4.5 V
      • rON = 350-mΩ at VIN = 3.3 V
      • rON = 400-mΩ at VIN = 2.5 V
      • rON = 600-mΩ at VIN = 1.8 V
    • Integrated 100-mA Minimum Current Limit
    • Undervoltage Lockout
    • Fast-Current Limit Response Time
    • Integrated Fault Blanking and Auto Restart
  • Stable Without Current Limiter Output Capacitor
    (TPS22949A Only)
  • Integrated Low-Noise RF LDO
    • Input Voltage Range: 1.62 V to 4.5 V
    • Low Noise: 50 µVrms (10 Hz to 100 kHz)
    • 80-dB VIN PSRR (10 Hz to 10 kHz)
    • Fast Start-Up Time: 130 µs
    • Low Dropout 100 mV at Iload =100 mA
    • Integrated Output Discharge
    • Stable With 2.2-µF Output Capacitor
  • 1.8-V Compatible Control Input Threshold
  • ESD Performance Tested Per JESD 22
    • 3500 V Human Body Model
      (A114-B, Class II)
    • 1000 V Charged Device Model
      (C101)
  • Tiny 8-Terminal YZP Package (1.9 mm × 0.9 mm,
    0.5-mm Pitch, 0.5-mm Height) and WSON-8
    (DRG) 3.0 mm × 3.0 mm

The TPS22949 and TPS22949A are devices that provide protection to systems and loads in high-current conditions. The device contains a 500-mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 4.5 V as well as a low-dropout (LDO) regulator with a fixed output voltage of 1.8 V.

The switch is controlled by an on/off input (EN1), which can interface directly with low-voltage control signals. When the switch current reaches the maximum limit, the TPS22949/TPS22949A operates in a constant-current mode to prohibit excessive currents from causing damage. If the constant current condition persists after 12 ms, these devices shut off the switch and pull the fault signal pin (OC) low. The TPS22949/TPS22949A has an auto-restart feature that turns the switch on again after 70 ms if the EN1 pin is still active.

The output of the current limiter is internally connected to an RF low-dropout (LDO) regulator that offers good AC performance with very low ground current, good power supply rejection ratio (PSRR), low noise, fast start-up, and excellent line and load transient response. The output of the regulator is stable with ceramic capacitors. This LDO uses a precision voltage reference and feedback loop to achieve overall accuracy of 2% over all load, line, process, and temperature variations.

The TPS22949A integrates additional internal circuitry that increases the current limit of the switch during the power-up sequence. This feature allows the TPS22949A to operate without a storage capacitor at the input of the LDO.

The TPS22949 and TPS22949A are available in a space-saving 8-terminal WCSP (YZP) or in an 8-pin WSON package (DRG). Both devices are characterized for operation over the free-air temperature range of –40°C to 85°C.

The TPS22949 and TPS22949A are devices that provide protection to systems and loads in high-current conditions. The device contains a 500-mΩ current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 4.5 V as well as a low-dropout (LDO) regulator with a fixed output voltage of 1.8 V.

The switch is controlled by an on/off input (EN1), which can interface directly with low-voltage control signals. When the switch current reaches the maximum limit, the TPS22949/TPS22949A operates in a constant-current mode to prohibit excessive currents from causing damage. If the constant current condition persists after 12 ms, these devices shut off the switch and pull the fault signal pin (OC) low. The TPS22949/TPS22949A has an auto-restart feature that turns the switch on again after 70 ms if the EN1 pin is still active.

The output of the current limiter is internally connected to an RF low-dropout (LDO) regulator that offers good AC performance with very low ground current, good power supply rejection ratio (PSRR), low noise, fast start-up, and excellent line and load transient response. The output of the regulator is stable with ceramic capacitors. This LDO uses a precision voltage reference and feedback loop to achieve overall accuracy of 2% over all load, line, process, and temperature variations.

The TPS22949A integrates additional internal circuitry that increases the current limit of the switch during the power-up sequence. This feature allows the TPS22949A to operate without a storage capacitor at the input of the LDO.

The TPS22949 and TPS22949A are available in a space-saving 8-terminal WCSP (YZP) or in an 8-pin WSON package (DRG). Both devices are characterized for operation over the free-air temperature range of –40°C to 85°C.
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类型 标题 下载最新的英语版本 日期
* 数据表 TPS22949x Current-Limited Load Switch With Low Noise Regulation Capability 数据表 (Rev. D) PDF | HTML 2015年 6月 30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 Selecting a Load Switch to Replace a Discrete Solution 2017年 4月 30日
应用手册 Timing of Load Switches 2017年 4月 27日
应用手册 Managing Inrush Current (Rev. A) 2015年 5月 28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
应用手册 简化的 LDO PSRR 测量 最新英语版本 (Rev.A) PDF | HTML 2010年 7月 28日

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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
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  • 封装厂地点

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