TPS2553-Q1 Automotive 2.7V to 5.5V, Precision Adjustable Current-Limit Power Distribution Switch |

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Automotive 2.7V to 5.5V, Precision Adjustable Current-Limit Power Distribution Switch



The TPS2553-Q1 power-distribution switch is intended for applications where precision current limiting is required or heavy capacitive loads and short circuits are encountered. It provides up to 1.5 A of continuous load current. This device offers a programmable current-limit threshold between 75 mA and 1.7 A (typical) via an external resistor. Current-limit accuracy as tight as ±6% can be achieved at the higher current-limit settings. The power-switch rise and fall times are controlled to minimize current surges during turn on and off.

The TPS2553-Q1 device limits the output current to a safe level by using a constant-current mode when the output load exceeds the current-limit threshold. An internal reverse-voltage comparator disables the power switch when the output voltage is driven higher than the input to protect devices on the input side of the switch. The FAULT output asserts low during overcurrent and reverse-voltage conditions.


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C3B
  • Up to 1.5-A Maximum Load Current
  • ±6% Current-Limit Accuracy at 1.7 A (Typical)
  • Meets Universal Serial Bus (USB) Current-Limiting Requirements
  • Backwards Compatible With TPS2550/51 and TPS2551-Q1
  • Adjustable Current-Limit, 75 mA–1300 mA (Typical)
  • Constant-Current Version
  • Fast Overcurrent Response - 2-µs (Typical)
  • 85-mΩ High-Side MOSFET
  • Reverse Input-Output Voltage Protection
  • Operating Range: 2.5 V to 6.5 V
  • Built-in Soft-Start
  • 15 kV ESD Protection per IEC 61000-4-2 (With External Capacitance)
  • See the TI Switch Portfolio


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Part number Order Vin (Min) (V) Vin (Max) (V) Continuous current (Max) (A) Current limit (A) Enable Number of switches Rating
TPS2553-Q1 Order now 2.5     6.5     1.5     0.075 to 1.7     Active High     1     Automotive    
TPS2551-Q1 Order now 2.5     6.5     1.1     0.1 to 1.1     Active High     1     Automotive    
TPS2561-Q1 Order now 2.5     6.5     2.5     0.25 to 2.5     Active High     2     Automotive