TPS2041B Single-Channel Current-Limited Power Distribution Switch |


Single-Channel Current-Limited Power Distribution Switch

Single-Channel Current-Limited Power Distribution Switch - TPS2041B

Recommended alternative parts

  • TPS2041C  -  For higher operating current, try the TPS20xxC family
  • TPS2044B  -  Quad Current-Limited Power Distribution Switches


The TPS20xxB power-distribution switches are intended for applications where heavy capacitive loads and short circuits are likely to be encountered. These devices incorporates 70-mΩ N-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input. Gate drive is provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize current surges during switching. The charge pump requires no external components and allows operation from supplies as low as 2.7 V.

When the output load exceeds the current-limit threshold or a short is present, the device limits the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When continuous heavy overloads and short circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures that the switch remains off until valid input voltage is present. This power-distribution switch is designed to set current limit at 1 A (typical).


  • 70-mΩ High-Side MOSFET
  • 500-mA Continuous Current
  • Thermal and Short-Circuit Protection
  • Accurate Current Limit
    (0.75 A Minimum, 1.25 A Maximum)
  • Operating Range: 2.7 V to 5.5 V
  • 0.6-ms Typical Rise Time
  • Undervoltage Lockout
  • Deglitched Fault Report (OC)
  • No OC Glitch During Power Up
  • Maximum Standby Supply Current:
    1-µA (Single, Dual) or 2-µA (Triple, Quad)
  • Ambient Temperature Range: –40°C to 85°C
  • UL Recognized, File Number E169910
  • Additional UL Recognition for TPS2042B and TPS2052B for Ganged Configuration

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Parametrics Compare all products in Fixed Current Limited Switch

Vin (Min) (V)
Vin (Max) (V)
Number of Switches
USB Switch rDS(on) (mOhms)
Continuous Current (Max) (A)
Current Limit Topology
Operating Temperature Range (C)
TPS2041B TPS2042B TPS2043B TPS2044B
2.7     2.7     2.7     2.7    
5.5     5.5     5.5     5.5    
1     2     3     4    
70     70     70     70    
0.5     0.5     0.5     0.5    
Active Low     Active Low     Active Low     Active Low    
Constant-Current     Constant-Current     Constant-Current     Constant-Current    
Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85    
16SOIC     16SOIC    

Other qualified versions of TPS2041B

Version Part Number Definition
Automotive TPS2041B-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
Enhanced Product TPS2041B-EP Supports Defense, Aerospace and Medical Applications