TPS22919 5.5V, 1.5A, 90mΩ self-protected load switch with controlled rise time |

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5.5V, 1.5A, 90mΩ self-protected load switch with controlled rise time



The TPS22919 device is a small, single channel load switch with controlled slew rate. The device contains an N-channel MOSFET that can operate over an input voltage range of 1.6 V to 5.5 V and can support a maximum continuous current of 1.5 A.

The switch ON state is controlled by a digital input that is capable of interfacing directly with low-voltage control signals. When power is first applied, a Smart Pull Down is used to keep the ON pin from floating until system sequencing is complete. Once the pin is deliberately driven High (>VIH), the Smart Pull Down will be disconnected to prevent unnecessary power loss.

The TPS22919 load switch is also self-protected, meaning that it will protect itself from short circuit events on the output of the device. It also has thermal shutdown to prevent any damage from overheating.

TPS22919 is available in a standard SC-70 package characterized for operation over a junction temperature range of –40°C to 125°C.


  • Input operating voltage range (VIN):
    1.6 V to 5.5 V
  • Maximum continuous current (IMAX): 1.5 A
  • On-Resistance (RON):
    • 5-V VIN: 89 mΩ (typical)
    • 3.6-V VIN: 90 mΩ (typical)
    • 1.8-V VIN: 105 mΩ (typical)
  • Output short protection (ISC): 3 A (typical)
  • Low power consumption:
    • ON state (IQ): 8 µA (typical)
    • OFF state (ISD): 2 nA (typical)
  • Smart ON pin pull down (RPD):
    • ON ≥ VIH (ION): 100 nA (maximum)
    • ON ≤ VIL (RPD): 530 kΩ (typical)
  • Slow Turn ON timing to limit inrush current (tON):
    • 5.0 V Turn ON time (tON):
      1.95 ms at 3.2 mV/µs
    • 3.6 V Turn ON time (tON):
      1.75 ms at 2.7 mV/µs
    • 1.8 V Turn ON time (tON):
      1.5 ms at 1.8 mV/µs
  • Adjustable output discharge and fall time:
    • Internal QOD resistance = 24 Ω (typical)

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Part number Order Number of channels (#) Vin (Min) (V) Vin (Max) (V) Imax (A) Ron (Typ) (mOhm) Shutdown current (ISD) (Typ) (uA) Quiescent current (Iq) (Typ) (uA) Soft start Rise time (Typ) (us) Features Operating temperature range (C)
TPS22919 Order now 1     1.6     5.5     1.5     90     0.002     8     Fixed Rise Time     1280     Quick Output Discharge, Thermal Shutdown     -40 to 105    
TPS22918 Order now 1     1     5.5     2     52     0.5     8.7     Adjustable Rise Time     135     Quick Output Discharge     -40 to 105