Adjustable, active-high, constant-current, current-limited power-distribution switch

TPS2551 is not recommended for new designs
Although this product continues to be in production to support previous designs, we don't recommend it for new designs. Consider one of these alternates:
open-in-new Compare alternates
Same functionality with different pin-out to the compared device
TPS2553 ACTIVE 0.075-1.7A adj. ILIMIT, 2.5-6.5V, 85mΩ USB power switch, active-high, reverse blocking This product is more accurate, SBS 1.1 Compliant, has faster communication capability and has a maintained design environment.

Product details

Product type Adjustable current limit, Power switch Vin (min) (V) 2.5 Vin (max) (V) 6.5 Continuous current (max) (A) 1.1 Current limit (A) 0.1 to 1.1 Operating temperature range (°C) -40 to 85 Enable Active High Number of switches 1 Current limit accuracy at 1 A 30% (700mA min / 1300mA max) Rating Catalog
Product type Adjustable current limit, Power switch Vin (min) (V) 2.5 Vin (max) (V) 6.5 Continuous current (max) (A) 1.1 Current limit (A) 0.1 to 1.1 Operating temperature range (°C) -40 to 85 Enable Active High Number of switches 1 Current limit accuracy at 1 A 30% (700mA min / 1300mA max) Rating Catalog
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8 WSON (DRV) 6 4 mm² 2 x 2
  • Adjustable current-limit, 100 mA–1100 mA
  • Fast overcurrent response - 2 µS typical
  • 94-mΩ high-side MOSFET (DBV package)
  • Reverse input-output voltage protection
  • Operating range: 2.5 V to 6.5 V
  • Deglitched fault report
  • 1-µA maximum standby supply current
  • Junction temperature range: –40°C to 125°C
  • Built-in soft-start
  • 15 kV ESD protection (with external capacitance)
  • UL listed – file No. E169910
  • Current-limit resistor calculator – SLVC163
  • Adjustable current-limit, 100 mA–1100 mA
  • Fast overcurrent response - 2 µS typical
  • 94-mΩ high-side MOSFET (DBV package)
  • Reverse input-output voltage protection
  • Operating range: 2.5 V to 6.5 V
  • Deglitched fault report
  • 1-µA maximum standby supply current
  • Junction temperature range: –40°C to 125°C
  • Built-in soft-start
  • 15 kV ESD protection (with external capacitance)
  • UL listed – file No. E169910
  • Current-limit resistor calculator – SLVC163

The TPS2550/51 power-distribution switch is intended for applications where heavy capacitive loads and short-circuits are likely to be encountered, incorporating a 100-mΩ, N-channel MOSFET in a single package. The current-limit threshold is user adjustable between 100 mA and 1.1 A via an external resistor. The power-switch rise and fall times are controlled to minimize current surges during switching.

The device limits the output current to a desired level by switching into a constant-current mode when the output load exceeds the current-limit threshold or a short is present. An internal reverse-voltage detection comparator disables the power-switch in the event that the output voltage is driven higher than the input to protect devices on the input side of the switch. The FAULT logic output asserts low during both overcurrent and reverse-voltage conditions.

The TPS2550/51 power-distribution switch is intended for applications where heavy capacitive loads and short-circuits are likely to be encountered, incorporating a 100-mΩ, N-channel MOSFET in a single package. The current-limit threshold is user adjustable between 100 mA and 1.1 A via an external resistor. The power-switch rise and fall times are controlled to minimize current surges during switching.

The device limits the output current to a desired level by switching into a constant-current mode when the output load exceeds the current-limit threshold or a short is present. An internal reverse-voltage detection comparator disables the power-switch in the event that the output voltage is driven higher than the input to protect devices on the input side of the switch. The FAULT logic output asserts low during both overcurrent and reverse-voltage conditions.

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Technical documentation

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Type Title Date
* Data sheet TPS255x Adjustable Current-Limited Power-Distribution Switches datasheet (Rev. C) PDF | HTML 09 Oct 2023
Certificate CB Certificate IEC 60950 A40 E169910 01 Jun 2020
Certificate UL Certificate of Compliance Vol1-Sec6 E169910 01 Jun 2020
EVM User's guide Power-Distribution Switch With Adjustable Current-Limit EVM (Rev. A) 26 Mar 2009

Design & development

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Calculation tool

SLVC163 TPS2550/51 Current Limit Calculator

Supported products & hardware

Supported products & hardware

Products
USB power switches & charging port controllers
TPS2550 Adjustable, active-low, constant-current, current-limited power-distribution switch TPS2551 Adjustable, active-high, constant-current, current-limited power-distribution switch
Package Pins Download
SOT-23 (DBV) 6 View options
WSON (DRV) 6 View options

Ordering & quality

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