5.5V, 1.8A, 115mΩ Load Switch with Quick Output Discharge and Reverse Current Protection - TPS22929D


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)
Special Features
Rise Time (Typ) (us)
Number of Channels (#)
Operating Temperature Range (C)
Approx. Price (US$)
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 TPS22918 TPS22958 TPS22960
1.4    1.0    0.6    1.62   
5.5    5.5    5.5    5.5   
1.8    2    4    0.5   
115    52    13    435   
2    8.7    55    0.35   
Quick Output Discharge
Reverse Current Protection   
Adjustable Rise Time
Quick Output Discharge   
Adjustable Rise Time
Quick Output Discharge
Quick Output Discharge   
3750    Adjustable    Adjustable    Adjustable   
1    1    1    2   
Catalog    Catalog    Catalog    Catalog   
-40 to 85    -40 to 105    -40 to 105    -40 to 85   
0.15 | 1ku    0.21 | 1ku    0.27 | 1ku    0.25 | 1ku   
2      2    2   
6250    Adjustable    Adjustable    Adjustable   
10      70    0.35   
125    55    13    737   
115    52    14     
10    0.5    0.5    2