TPS22971 3.6V, 3A, 6.7mΩ Load Switch with Adjustable Fast Turn-On, Power Good, and Quick Output Discharge |


3.6V, 3A, 6.7mΩ Load Switch with Adjustable Fast Turn-On, Power Good, and Quick Output Discharge



The TPS22971 is a space-saving single-channel load switch with controlled and adjustable Turn-ON slew rate and an integrated Power Good indicator. The device contains an N-channel MOSFET that can operate over a low input voltage range of 0.65 V to 3.6 V and can support a maximum continuous current of 3 A. A low on-resistance of 6.7-mΩ minimizes the power loss and voltage drop across the load switch. The switch is controlled by an on and off input (ON), which is capable of interfacing directly with low-voltage control signals.

By default, the TPS22971 has a Fast Turn-ON time to minimize system startup and wait time. The Adjustable Slew Rate can also be reduced to limit inrush current. A Power Good (PG) signal internally monitors the gate threshold and indicates when the switch is fully on. When the switch is disabled, a 150-Ω on-chip resistor quickly discharges the output to ground and keeps it from floating.

The TPS22971 is available in an ultra-small, space saving 8-pin WCSP package and is characterized for operation over the free-air temperature range of –40°C to 105°C and integrates thermal shutdown to turn off in case of overheating.


  • Input Voltage Range (VIN): 0.65 V to 3.6 V
  • On-Resistance
    • RON = 6.7 mΩ (typical) at VIN ≥ 1.8 V
    • RON = 7.2 mΩ (typical) at VIN = 1.05 V
    • RON = 8.9 mΩ (typical) at VIN = 0.65 V
  • Maximum Continuous Switch Current (IMAX): 3 A
  • ON State (IQ): 30 µA (typical) at 3.6 VIN
  • OFF State (ISD): 1 µA (typical) at 3.6 VIN
  • Adjustable Slew Rate through CT Pin
    • Fast Turn-ON ≤ 65 µs at VIN = 1 V
  • Power Good (PG) Indicator After Switch Turn ON
  • Low Threshold Enable (ON) of 0.9 V (VIH) supports use of low voltage control logic
  • Thermal Shutdown (TSD)
  • Quick Output Discharge (QOD): 150-Ω (typical)

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Parametrics Compare all products in Load switches

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)
Operating Temperature Range (C)
Adjustable Rise Time    
Power Good
Quick Output Discharge
Thermal Shutdown    
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