Product details

Vin (Min) (V) 2.5 Vin (Max) (V) 6.5 Continuous current (Max) (A) 5 Current limit (A) 0.5 to 5.0 Product type Adjustable current limit, Power switch Operating temperature range (C) -40 to 125 Enable Active High Number of switches 1 TI functional safety category Functional Safety-Capable Rating Automotive
Vin (Min) (V) 2.5 Vin (Max) (V) 6.5 Continuous current (Max) (A) 5 Current limit (A) 0.5 to 5.0 Product type Adjustable current limit, Power switch Operating temperature range (C) -40 to 125 Enable Active High Number of switches 1 TI functional safety category Functional Safety-Capable Rating Automotive
VSON (DRB) 8 9 mm² 3 x 3
  • AEC-Q100 Qualified
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C5
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Meets USB current-limiting requirements
  • Adjustable current limit, 500 mA – 5 A (typ.)
  • ±6.5% current-limit accuracy at 4.5 A
  • Fast short-circuit response – 3.5 µs (typ.)
  • 22-mΩ high-side MOSFET
  • Operating range: 2.5 V to 6.5 V
  • 2-µA maximum standby supply current
  • Built-in soft-start
  • 15-kV and 8-kV system-level ESD capable
  • Safety-related certifications:
    • UL Recognized for UL 2367
    • CB Certification for IEC 60950
    • CB Certification for IEC 62368
  • AEC-Q100 Qualified
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C5
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Meets USB current-limiting requirements
  • Adjustable current limit, 500 mA – 5 A (typ.)
  • ±6.5% current-limit accuracy at 4.5 A
  • Fast short-circuit response – 3.5 µs (typ.)
  • 22-mΩ high-side MOSFET
  • Operating range: 2.5 V to 6.5 V
  • 2-µA maximum standby supply current
  • Built-in soft-start
  • 15-kV and 8-kV system-level ESD capable
  • Safety-related certifications:
    • UL Recognized for UL 2367
    • CB Certification for IEC 60950
    • CB Certification for IEC 62368

The TPS2556-Q1 and TPS2557-Q1 power-distribution switches are specialized for automotive applications which require precision current limiting or capacity to handle heavy capacitive loads and short circuits. These devices offer a programmable current-limit threshold between 500 mA and 5 A (typical) via an external resistor. Control of the power-switch rise and fall times minimizes current surges during turnon or turnoff.

TPS2556-Q1 and TPS2557-Q1 devices limit the output current to a safe level by switching into a constant-current mode when the output load exceeds the current-limit threshold. The FAULT logic output asserts low during overcurrent and overtemperature conditions.

Use with the TPS2511-Q1 or TPS2513A-Q1 for a low-loss, automotive-qualified, USB charging-port solution capable of charging all of today’s popular phones and tablets.

The TPS2556-Q1 and TPS2557-Q1 power-distribution switches are specialized for automotive applications which require precision current limiting or capacity to handle heavy capacitive loads and short circuits. These devices offer a programmable current-limit threshold between 500 mA and 5 A (typical) via an external resistor. Control of the power-switch rise and fall times minimizes current surges during turnon or turnoff.

TPS2556-Q1 and TPS2557-Q1 devices limit the output current to a safe level by switching into a constant-current mode when the output load exceeds the current-limit threshold. The FAULT logic output asserts low during overcurrent and overtemperature conditions.

Use with the TPS2511-Q1 or TPS2513A-Q1 for a low-loss, automotive-qualified, USB charging-port solution capable of charging all of today’s popular phones and tablets.

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Technical documentation

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Type Title Date
* Data sheet TPS255x-Q1 Precision Automotive Adjustable Current-Limited Power-Distribution datasheet (Rev. B) 23 Sep 2020
Certificate TPS2557-Q1 UL Certificate of Compliance IEC 62368-1 07 Sep 2020
Functional safety information TPS2556-Q1, TPS2557-Q1 Functional Safety FIT Rate and Failure Mode Distribution (Rev. A) 20 Jul 2020
Application note How to Pass MFi Overcurrent Protection Test With USB Charger and Switch Device 26 Feb 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
User guide Using the TPS2556/7EVM 19 Nov 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS2557DRBEVM-423 — TPS2557DRBEVM-423: Evaluation Module for TPS2557

The TPS2556EVM-423 and TPS2557EVM-423 are evaluation modules (EVM) for Texas Instruments power-distribution switches with adjustable current-limit. These EVMs operate over a 2.5-V to 6.5-V range. An on-board jumper sets the output current-limit to either 0.5 A or 1 A. The board is designed for the (...)

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Simulation model

TPS2557 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM409A.ZIP (31 KB) - PSpice Model
Simulation model

TPS2557 TINA-TI Transient Reference Design

SLVM494.TSC (635 KB) - TINA-TI Reference Design
Simulation model

TPS2557 TINA-TI Transient Spice Model

SLVM495.ZIP (22 KB) - TINA-TI Spice Model
Reference designs

PMP21771 — 30-W power for automotive dual USB Type-C™ charge port reference design

This reference design employs an LM61460-Q1 synchronous buck regulator that provides a total of 6 A of current to two TPS2557-Q1 load switch channels to provide 30W of total power to dual USB Type-C charge ports. The system is designed for high power efficiency and thermal performance and comes in a (...)
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SON (DRB) 8 View options

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