TPS25221 Precision Adjustable Current-Limited Power-Distribution Switches | TI.com

TPS25221 (ACTIVE) Precision Adjustable Current-Limited Power-Distribution Switches

 

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.

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)

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Parametrics

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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
TPS25221 Order now 2.5     5.5     2.5     0.25 to 2.7     Active High     1     Catalog    
TPS2555 Order now 4.5     5.5     2.5     0.25 to 2.7     Active Low     1     Catalog    
TPS2556 Order now 2.5     6.5     5     0.5 to 5.0     Active Low     1     Catalog    
TPS2557 Order now 2.5     6.5     5     0.5 to 5.0     Active High     1     Catalog    
TPS2559 Order now 2.5     6.5     5     Adjustable     Active High     1     Catalog