1.2V - 8V, 3A PFET High Side Load Switch w/ Level Shift & Adj Slew Rate Control


Recommended alternative parts

  • TPS22918  -  for <6V <2A sockets, offers higher integration and additional features in the same SOT-23 package
  • TPS22975  -  for <6V >2A sockets, offers higher integration and higher performance in a smaller 2mm x 2mm QFN package
  • TPS22810  -  for >6V sockets, offers higher integration & additional features in either the same SOT-23 package (2A maximum), or a smaller 2mm x 2mm QFN package (3A maximum)


The TPS27081A device is a high-side load switch that integrates a Power PFET and a Control NFET in a tiny package.

The TPS27081A features industry-standard ESD protection on all pins providing better ESD compatibility with other onboard components.

The TPS27081A level shifts ON/OFF logic signal to VIN levels and supports as low as 1-V CPU or MCU logic to control higher voltage power supplies without requiring an external level-shifter.

Switching a large value output capacitor CL through a fast ON/OFF logic signal may result in an excessive inrush current. To control the load inrush current, connect a resistor R2 and add an external capacitor C1 as shown in the Simplified Schematic. To configure the TPS27081A to achieve a specific slew rate, refer to the Application and Implementation section.

A single pullup resistor R1 is required in standby power switch applications. In such applications connect the R2 pin of the TPS27081A to the system ground when inrush current control is not required.


  • Low ON-Resistance, High-Current PFET
    • RDS(on) = 32 mΩ at VGS = –4.5 V
    • RDS(on) = 44 mΩ at VGS = –3 V
    • RDS(on) = 82 mΩ at VGS = –1.8 V
    • RDS(on) = 93 mΩ at VGS = –1.5 V
    • RDS(on) = 155 mΩ at VGS = –1.2 V
  • Adjustable Turnon and Turnoff Slew Rate Control
    Through External R1, R2, and C1
  • Supports a Wide Range of 1.2-V to 8-V Supply
  • Integrated NMOS for PFET Control
  • NMOS ON/OFF Supports a Wide Range of 1-V to
    8-V Control Logic Interface
  • Full ESD Protection (All Pins)
    • HBM 2 kV, CDM 500 V
  • Ultra-Low Leakage Current in Standby (Typical
    100 nA)
  • Available in Tiny 6-Pin Package
    • 2.9 mm × 2.8 mm × 0.75 mm SOT (DDC)

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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)
TPS27081A TPS22810 TPS22918 TPS22929D
1.2    2.7    1.0    1.4   
8    18    5.5    5.5   
3    3    2    1.8   
41    79    52    115   
0.03    62    8.7    2   
N/A    Quick Output Discharge
Thermal Shutdown
Under Voltage Lock Out   
Quick Output Discharge    Quick Output Discharge
Reverse Current Protection   
Adjustable Rise Time    Adjustable Rise Time    Adjustable Rise Time    Fixed Rise Time   
0.253    115    135    3660   
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   
Adjustable      Adjustable    6250   
0.6    85    17    10   
82      55    125   
32    85    52    115   
0.05    0.5    0.5    10   
    Min   Max   Range  
  Vin V    1.2 – 8V  
  Iout A    ≤ 3A  
  Ambient Temp °C    -40 – 85°C  
  CLoad µF    0.001 – 100µF  
  Inrush Current 2 A        
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