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TPS51397A

ACTIVE

4.5-V to 24-V input, 10-A, synchronous step-down regulator

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Data sheet

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TPS51386 ACTIVE 4.5-V to 24-V input, 8-A synchronous buck converter  Higher efficiency and lower IQ in a smaller package with a lower current

TPS51397A

ACTIVE
Data sheet Order now

Product details

Rating Catalog Topology Buck Iout (max) (A) 10 Vin (max) (V) 24 Vin (min) (V) 4.5 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Enable, Light Load Efficiency, Output discharge, Over Current Protection, Power good, Soft Start Adjustable, Synchronous Rectification, UVLO Fixed Operating temperature range (°C) -40 to 125 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 800 Iq (typ) (µA) 110 Control mode D-CAP3 Duty cycle (max) (%) 91 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 10 Vin (max) (V) 24 Vin (min) (V) 4.5 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Features Enable, Light Load Efficiency, Output discharge, Over Current Protection, Power good, Soft Start Adjustable, Synchronous Rectification, UVLO Fixed Operating temperature range (°C) -40 to 125 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 800 Iq (typ) (µA) 110 Control mode D-CAP3 Duty cycle (max) (%) 91 Type Converter
VQFN-HR (RJE) 20 9 mm² 3 x 3
  • Input voltage range: 4.5 V to 24 V
  • Output voltage range: 0.6 V to 5.5 V
  • Supports 10-A continuous output current
  • D-CAP3™ architecture control for fast transient response
  • 0.6 V ± 1% feedback voltage accuracy (25°C)
  • Integrated 17-mΩ and 5.9-mΩ FETs
  • ULQ™ operation (110 µA) to enable long battery life during system standby
  • Selectable Eco-mode™ and Out-of-Audio™ by MODE pin
  • 500-kHz and 800-kHz selectable switching frequency
  • Adjustable soft-start time with default internal 1.2 ms
  • Large duty cycle operation
  • Integrated power-good indicator
  • Built-in output discharge function
  • Cycle-by-cycle overcurrent protection
  • Latched output OV and UV protections
  • Non-latched UVLO and OT protections
  • -40°C to 125°C Operating junction temperature
  • 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN package
  • Pin-to-pin compatible with 12-A TPS56C230
  • Create a custom design using the TPS51397A with the WEBENCH® Power Designer
  • Input voltage range: 4.5 V to 24 V
  • Output voltage range: 0.6 V to 5.5 V
  • Supports 10-A continuous output current
  • D-CAP3™ architecture control for fast transient response
  • 0.6 V ± 1% feedback voltage accuracy (25°C)
  • Integrated 17-mΩ and 5.9-mΩ FETs
  • ULQ™ operation (110 µA) to enable long battery life during system standby
  • Selectable Eco-mode™ and Out-of-Audio™ by MODE pin
  • 500-kHz and 800-kHz selectable switching frequency
  • Adjustable soft-start time with default internal 1.2 ms
  • Large duty cycle operation
  • Integrated power-good indicator
  • Built-in output discharge function
  • Cycle-by-cycle overcurrent protection
  • Latched output OV and UV protections
  • Non-latched UVLO and OT protections
  • -40°C to 125°C Operating junction temperature
  • 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN package
  • Pin-to-pin compatible with 12-A TPS56C230
  • Create a custom design using the TPS51397A with the WEBENCH® Power Designer

The device is a monolithic 10-A synchronous buck converter with integrated MOSFETs that enable high efficiency and offers ease-of-use with minimum external component count for space-conscious power systems.

The TPS51397A employs D-CAP3™ control that provides fast transient response and excellent line and load regulation with internal compensation. The ULQ™ (Ultra Low Quiescent) feature is extremely beneficial for long battery life in low power operation. The large duty operation greatly improves the load transient performance when input voltage is low.

The MODE pin can be used to set Eco-mode™ or Out-of-Audio™ (OOA) mode for light-load operation and 500-kHz or 800-kHz switching frequency. The Eco-mode™ maintains high efficiency during light load operation. The OOA mode keeps the switching frequency above audible frequency with minimum reduction in efficiency.

The device supports both internal and external soft-start options. It has an internal fixed soft-start time of 1.2 ms. If the application needs a longer soft-start time, the external SS pin can be connected to an external capacitor.

The TPS51397A integrates a power-good indicator and provides an output discharge function. It provides complete protection including OVP, UVP, OCP, OTP, and UVLO. The device is available in a 20-pin 3.0-mm x 3.0-mm HotRod™ package and the junction temperature is specified from –40°C to 125°C.

The device is a monolithic 10-A synchronous buck converter with integrated MOSFETs that enable high efficiency and offers ease-of-use with minimum external component count for space-conscious power systems.

The TPS51397A employs D-CAP3™ control that provides fast transient response and excellent line and load regulation with internal compensation. The ULQ™ (Ultra Low Quiescent) feature is extremely beneficial for long battery life in low power operation. The large duty operation greatly improves the load transient performance when input voltage is low.

The MODE pin can be used to set Eco-mode™ or Out-of-Audio™ (OOA) mode for light-load operation and 500-kHz or 800-kHz switching frequency. The Eco-mode™ maintains high efficiency during light load operation. The OOA mode keeps the switching frequency above audible frequency with minimum reduction in efficiency.

The device supports both internal and external soft-start options. It has an internal fixed soft-start time of 1.2 ms. If the application needs a longer soft-start time, the external SS pin can be connected to an external capacitor.

The TPS51397A integrates a power-good indicator and provides an output discharge function. It provides complete protection including OVP, UVP, OCP, OTP, and UVLO. The device is available in a 20-pin 3.0-mm x 3.0-mm HotRod™ package and the junction temperature is specified from –40°C to 125°C.

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TPS568230 ACTIVE 4.5-V to 18-V, 8-A synchronous SWIFT™ buck converter optimized for solution cost Narrower VIN for 12-V applications.
TPS56C230 ACTIVE 4.5-V to 18-V, 12-A synchronous SWIFT™ buck converter optimized for solution cost Offers higher IOUT with narrower VIN.

Technical documentation

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Type Title Date
* Data sheet TPS51397A 4.5-V to 24-V, 10-A Synchronous Buck Converter with ULQ™ Operation datasheet (Rev. A) PDF | HTML 12 Oct 2020
Application note Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part II: Hybrid Sense Network PDF | HTML 27 Feb 2024
Application note Measuring the Bode Plot of D-CAP™, D-CAP2™, and D-CAP3™ DC/DC Converters (Rev. A) PDF | HTML 21 Apr 2023
Application note Stability Analysis and Design of D-CAP2 and D-CAP3 Converter – Part 2 PDF | HTML 02 Aug 2021
Application note Stability Analysis and Design of D-CAP2 and D-CAP3 Converter – Part 1 PDF | HTML 09 Jun 2021
EVM User's guide TPS51397A Step-Down Converter Evaluation Module User's Guide (Rev. A) PDF | HTML 23 Apr 2021
Application note Non-Isolated DC/DC Solutions for Alder Lake in Notebook Computing Applications PDF | HTML 08 Jan 2021

Design & development

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

Evaluation board

TPS51397AEVM — 10-A synchronous step-down regulator evaluation module

The TPS51397AEVM evaluation module (EVM) is used to evaluate the TPS51397A device. The TPS51397A is a synchronous buck converter designed to provide up to a 10-A output. The input voltage is rated for 4.5 V to 24 V. The TPS51397A uses a proprietary D-CAP3™ control mode. It provides (...)
User guide: PDF | HTML
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Simulation model

TPS51397A PSpice Transient Model

SLUM756.ZIP (151 KB) - PSpice Model
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VQFN-HR (RJE) 20 Ultra Librarian
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