Product
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TPS25221
  • TPS25221
  • TPS25221
  • TPS25221

TPS25221

ACTIVE

0.275-2.7A adj. ILIMIT, 2.5-5.5V, 70mΩ USB power switch, active-high, reverse blocking

Texas Instruments TPS25221 Product Info

1 April 2026 3

Parameters

Product type

Adjustable current limit, Power switch

Rating

Catalog

Continuous current (max) (A)

2

Current limit (A)

0.25 to 2.7

Number of switches

1

Enable

Active High

Vin (max) (V)

5.5

Vin (min) (V)

2.5

Operating temperature range (°C)

-40 to 125

Current limit accuracy at 1 A

0.1

Package

SOT-23 (DBV)-6-8.12 mm² 2.9 x 2.8

Features

  • 2.5-V to 5.5-V VOPERATING
  • Pin-to-Pin with TPS2553
  • 2-A ICONT_MAX
  • 0.275-A to 2.7-A Adjustable ILIMIT (±6.5% at 1.7 A)
  • 70-mΩ (typical) RON
  • 1.5-µs Short Circuit Response
  • 8-ms Fault Reporting Deglitch
  • Reverse Current Blocking (when disabled)
  • Built-In Soft Start
  • UL 60950 and UL 62368 Recognition
  • 15-kV ESD Protection per IEC 61000-4-2 (with external capacitance)
  • 2.5-V to 5.5-V VOPERATING
  • Pin-to-Pin with TPS2553
  • 2-A ICONT_MAX
  • 0.275-A to 2.7-A Adjustable ILIMIT (±6.5% at 1.7 A)
  • 70-mΩ (typical) RON
  • 1.5-µs Short Circuit Response
  • 8-ms Fault Reporting Deglitch
  • Reverse Current Blocking (when disabled)
  • Built-In Soft Start
  • UL 60950 and UL 62368 Recognition
  • 15-kV ESD Protection per IEC 61000-4-2 (with external capacitance)

Description

The TPS25221 is intended for applications where heavy capacitive loads and short circuits may be encountered. The programmable current-limit threshold maybe set between 275 mA and 2.7 A (typical) using an external resistor. ILIMIT accuracy as tight as ±6% can be achieved at the higher current-limit settings. Power-switch rise and fall times are controlled to minimize current surges during turn on and turn off.

When a load attempts to draw current exceeding the programmed ILIMIT the internal FET enters constant current mode in order to keep ILOAD at or below ILIMIT. The FAULT output will assert low during over-current conditions after the built in de-glitch time.

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