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TPS54331
  • TPS54331
  • TPS54331
  • TPS54331
  • TPS54331

TPS54331

ACTIVE

3.5V to 28V Input, 3A, 570kHz Step-Down Converter with Eco-mode

Texas Instruments TPS54331 Product Info

1 April 2026 4

Parameters

Rating

Catalog

Topology

Buck

Iout (max) (A)

3

Vin (max) (V)

28

Vin (min) (V)

3.5

Vout (max) (V)

25

Vout (min) (V)

0.8

Features

Adjustable soft start, Enable, Light-load efficiency, UVLO adjustable

Control mode

current mode

Operating temperature range (°C)

-40 to 150

Iq (typ) (A)

0.00011

Duty cycle (max) (%)

90

Package

HSOIC (DDA)-8-29.4 mm² 4.9 x 6

Features

  • 3.5 to 28-V input voltage range
  • Adjustable output voltage down to 0.8 V
  • Integrated 80-mΩ high-side MOSFET supports up to 3-A continuous output current
  • High efficiency at light loads with a pulse skipping Eco-mode
  • Fixed 570-kHz switching frequency
  • Typical 1-µA shutdown quiescent current
  • Adjustable slow-start limits inrush currents
  • Programmable UVLO threshold
  • Overvoltage transient protection
  • Cycle-by-cycle current limit, frequency foldback, and thermal shutdown protection
  • Available in easy-to-use SOIC8 package or thermally-enhanced SOIC8 PowerPAD™ integrated circuit package
  • Create a custom design using the TPS54331 with the WEBENCH Power Designer
  • Use TPS62933 for a 30 VIN converter with higher frequency, lower IQ and improved EMI
  • 3.5 to 28-V input voltage range
  • Adjustable output voltage down to 0.8 V
  • Integrated 80-mΩ high-side MOSFET supports up to 3-A continuous output current
  • High efficiency at light loads with a pulse skipping Eco-mode
  • Fixed 570-kHz switching frequency
  • Typical 1-µA shutdown quiescent current
  • Adjustable slow-start limits inrush currents
  • Programmable UVLO threshold
  • Overvoltage transient protection
  • Cycle-by-cycle current limit, frequency foldback, and thermal shutdown protection
  • Available in easy-to-use SOIC8 package or thermally-enhanced SOIC8 PowerPAD™ integrated circuit package
  • Create a custom design using the TPS54331 with the WEBENCH Power Designer
  • Use TPS62933 for a 30 VIN converter with higher frequency, lower IQ and improved EMI

Description

The TPS54331 device is a 28-V, 3-A non-synchronous buck converter that integrates a low R DS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode feature is automatically activated. Furthermore, the 1-µA shutdown supply-current allows the device to be used in battery-powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the hysteresis of the input undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during start-up and transient conditions. A cycle-by-cycle current-limit scheme, frequency foldback and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54331 device is available in an 8-pin SOIC package and 8-pin SO PowerPAD integrated circuit package that have been internally optimized to improve thermal performance.

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