TPS22944 (正在供货)

5.5V,0.2A,400mΩ,100mA 限流负载开关

 

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Special Note

No EVM exists for the TPS22944, however, similar EVM TPS22945EVM-082 is available.

描述

The TPS22941/2/3/4/5 load switches provide protection to systems and loads in high-current conditions. The devices contain a 0.4-Ω current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. Current is prevented from flowing when the MOSFET is off. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals. The TPS22941/2/3/4/5 includes thermal shutdown protection that prevents damage to the device when a continuous over-current condition causes excessive heating by turning off the switch.

These devices provide an integrated, robust solution to provide current limiting the output current to a safe level by switching into a constant-current mode when the ouptut load exceeds the current-limit threshold. The OC logic output asserts low during overcurrent, undervoltage, or overtemperature conditions. These additional features make the TPS22941/2/3/4/5 an ideal solution for applications where current limiting is necessary.

This family of devices are available in a SC70-5 (DCK) package. It is characterized for operation over the free-air temperature range of –40°C to 85°C.

特性

  • Input Voltage Range: 1.62 V to 5.5 V
  • Low ON resistance
    • rON = 0.4 Ω at VIN = 5.5 V
    • rON = 0.5 Ω at VIN = 3.3 V
    • rON = 0.6 Ω at VIN = 2.5 V
    • rON = 0.8 Ω at VIN = 1.8 V
  • Minimum Current Limit: 40 mA or 100 mA
  • Undervoltage Lockout (UVLO)
  • Thermal Shutdown
  • Shutdown Current < 1 µA
  • Fast Current Limit Response Time
  • Fault Blanking
  • Auto Restart
  • 1.8-V Compatible Control Input Thresholds
  • ESD Performance Tested Per JESD 22
    • 4000-V Human-Body Model
      (A114-B, Class II)
    • 1000-V Charged-Device Model (C101)
  • Tiny SC-70 (DCK) Package
  • UL Recognized Component (UL File 169910)
  • Evaluated to IEC 60950-1, Ed 2, Am1, Annex CC,
    Test Program 2 with CB Report

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参数 与其它产品相比 电压与电流限制保护

 
Vin (Min) (V)
Vin (Max) (V)
Current Limit (Min) (A)
Current Limit (Max) (A)
Current Limit Type
Ron (Typ) (mOhm)
Soft Start
Features
Fault Response
Number of Channels (#)
Rise Time (Typ) (us)
Overvoltage Protection
UL Recognition
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Imax (A)
Quiescent Current (Iq) (Max) (uA)
Quiescent Current (Iq) (Typ) (uA)
Shutdown Current (ISD) (Typ) (uA)
TPS22944 TPS22941 TPS22942 TPS22943 TPS22945 TPS22946
1.62    1.62    1.62    1.62    1.62    1.62   
5.5    5.5    5.5    5.5    5.5    5.5   
0.04    0.04    0.1    0.1    0.1    0.03   
0.08    0.08    0.2    0.2    0.2    0.235   
Fixed    Fixed    Fixed    Fixed    Fixed    Adjustable   
500    500    500    500    500    400   
Fixed Rise Time    Fixed Rise Time    Fixed Rise Time    Fixed Rise Time    Fixed Rise Time    Fixed Rise Time   
Fault Reporting
Thermal Shutdown
Under Voltage Lock Out   
Active Low
Fault Reporting
Thermal Shutdown
Under Voltage Lock Out   
Active Low
Fault Reporting
Thermal Shutdown
Under Voltage Lock Out   
Fault Reporting
Thermal Shutdown
Under Voltage Lock Out   
Fault Reporting
Thermal Shutdown
Under Voltage Lock Out   
Fault Reporting
Over Current Reporting
Thermal Shutdown   
Auto Retry    Auto Retry    Auto Retry    Auto Retry    Auto Retry    Auto Retry   
1    1    1    1    1    1   
10    10    10    10    10    35   
None    None    None    None    None    None   
Yes    Yes    Yes    Yes    Yes    No   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
SC70    SC70    SC70    SC70    SC70    DSBGA   
5SC70: 4 mm2: 2.1 x 2(SC70)    5SC70: 4 mm2: 2.1 x 2(SC70)    5SC70: 4 mm2: 2.1 x 2(SC70)    5SC70: 4 mm2: 2.1 x 2(SC70)    5SC70: 4 mm2: 2.1 x 2(SC70)    See datasheet (DSBGA)   
0.08    0.08    0.2    0.2    0.2    0.235   
80    80    80    80    80    5   
40    40    40    40    40    1.3   
1    1    1    1    1    0.1   

WEBENCH® Designer TPS22944

  Min   Max Range
Vin  V 1.62 to 5.50V
Iout  A ≤ 0.08A
Ambient Temp  °C -40 to 85°C
CLoad  µF 0.001 to 100µF
Inrush Current  A
Footprint BOM Cost Ron