5.5V, 1.8A, 115mΩ Load Switch with Quick Output Discharge and Reverse Current Protection


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The TPS22929D is a small, low rON load switch with controlled turn on. The device contains a P-channel MOSFET that can operate over an input voltage range of 1.4 V to 5.5 V. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals. The TPS22929D is active high enable.

The TPS22929D contains a 150-Ω on-chip load resistor for quick output discharge when the switch is turned off. The rise time of the device is internally controlled in order to avoid inrush current.

The TPS22929D device provides circuit breaker functionality by latching off the power-switch during reverse voltage situations. An internal reverse voltage comparator disables the power-switch when the output voltage (VOUT) is driven higher than the input (VIN) to quickly (10 µs typ) stop the flow of current towards the input side of the switch. Reverse current is always active, even when the power-switch is disabled. Additionally, under-voltage lockout (UVLO) protection turns the switch off if the input voltage is too low.

The TPS22929D is available in a small, space-saving 6-pin SOT23 package and is characterized for operation over the free-air temperature range of –40°C to 85°C.


  • Integrated Single Load Switch
  • Small SOT23-6 Package
  • Input Voltage Range: 1.4 V to 5.5 V
  • Low ON-Resistance
    • rON = 115 mΩ at VIN = 5 V
    • rON = 115 mΩ at VIN = 3.3 V
    • rON = 118 mΩ at VIN = 2.5 V
    • rON = 129 mΩ at VIN = 1.5 V
  • 1.8-A Continuous Switch Current (25°C)
  • Low Threshold Control Input
  • Controlled Slew-rate
  • Under-Voltage Lock Out
  • Quick Output Discharge
  • Reverse Current Protection

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Parametrics Compare all products in Power Distribution & Savings

Vin (Min) (V)
Vin (Max) (V)
Imax (A)
Ron (Typ) (mOhm)
Quiescent Current (Iq) (Typ) (uA)
Soft Start
Rise Time (Typ) (us)
Current Limit Type
Number of Channels (#)
UL Recognition
Operating Temperature Range (C)
Output Rise Time @ 1.8V (Typ) (us)
Quiescent Current (Iq) (Max) (uA)
Ron @1.8V (Typ) (mOhm)
Ron @4.5V (Typ) (mOhm)
Shutdown Current (ISD) (Typ) (uA)
TPS22929D TPS22810 TPS22918 TPS27081A
1.4    2.7    1.0    1.2   
5.5    18    5.5    8   
1.8    3    2    3   
115    79    52    41   
2    62    8.7    0.03   
Quick Output Discharge
Reverse Current Protection   
Quick Output Discharge
Thermal Shutdown
Under Voltage Lock Out   
Quick Output Discharge    N/A   
Fixed Rise Time    Adjustable Rise Time    Adjustable Rise Time    Adjustable Rise Time   
3660    115    135    0.253   
None    None    None    None   
1    1    1    1   
No    No    No    No   
Catalog    Catalog    Catalog    Catalog   
-40 to 85    -40 to 105    -40 to 105    -40 to 85   
2    2    2    2   
6250      Adjustable    Adjustable   
10    85    17    0.6   
125      55    82   
115    85    52    32   
10    0.5    0.5    0.05