TPS51396A

ACTIVE

4.5-V to 24-V, 8-A synchronous step-down voltage regulator

A newer version of this product is available

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

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 8 Vin (min) (V) 4.5 Vin (max) (V) 24 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 1000 Features Enable, Light Load Efficiency, Output discharge, Over Current Protection, Power good, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP3 Vout (min) (V) 0.6 Vout (max) (V) 7 Iq (typ) (µA) 90 Duty cycle (max) (%) 88.6
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 8 Vin (min) (V) 4.5 Vin (max) (V) 24 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 1000 Features Enable, Light Load Efficiency, Output discharge, Over Current Protection, Power good, Soft Start Adjustable, Synchronous Rectification Control mode D-CAP3 Vout (min) (V) 0.6 Vout (max) (V) 7 Iq (typ) (µA) 90 Duty cycle (max) (%) 88.6
VQFN-HR (RJE) 20 9 mm² 3 x 3
  • Input voltage range: 4.5 V to 24 V
  • D-CAP3™ architecture control for fast transient response
  • Output voltage range: 0.6 V to 7 V
  • 1% feedback voltage accuracy (25°C)
  • Continual output current: 8 A
  • Integrated 19.5-mΩ and 9.5-mΩ RDS(on) internal power switch
  • ULQ™ operation to enable long battery life during system standby
  • Eco-Mode™ and OOA mode selectable for light load running by MODE pin
  • 600-kHz, 800-kHz and 1-MHz selectable switching frequency by MODE pin
  • Out-of-Audio (OOA) light- load operation with switching frequency over 25 kHz
  • Large duty operation support
  • Adjustable soft-start time by SS pin
  • Power good indicator
  • Built-in output discharge function
  • Cycle-by-cycle over current protection
  • Latched output for OV and UV protections
  • Non-latched for OT and UVLO protections
  • 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN package
  • Input voltage range: 4.5 V to 24 V
  • D-CAP3™ architecture control for fast transient response
  • Output voltage range: 0.6 V to 7 V
  • 1% feedback voltage accuracy (25°C)
  • Continual output current: 8 A
  • Integrated 19.5-mΩ and 9.5-mΩ RDS(on) internal power switch
  • ULQ™ operation to enable long battery life during system standby
  • Eco-Mode™ and OOA mode selectable for light load running by MODE pin
  • 600-kHz, 800-kHz and 1-MHz selectable switching frequency by MODE pin
  • Out-of-Audio (OOA) light- load operation with switching frequency over 25 kHz
  • Large duty operation support
  • Adjustable soft-start time by SS pin
  • Power good indicator
  • Built-in output discharge function
  • Cycle-by-cycle over current protection
  • Latched output for OV and UV protections
  • Non-latched for OT and UVLO protections
  • 20-pin 3.0-mm × 3.0-mm HotRod™ VQFN package

The TPS51396A is a cost-effective, high-voltage input, high-efficiency synchronous buck converter with integrated FETs.

The key feature of the TPS51396A is its ULQ (Ultra Low Quiescent) feature to enable low-bias current and large duty operation. The ULQ feature is extremely beneficial for long battery life in low power operation. The TPS51396A operates with a supply input voltage ranging from 4.5 V to 24 V. It uses DCAP3 control mode to provide a fast transient response, good line, load regulation, no requirement for external compensation, and supports low equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors.

The TPS51396A provides complete protection OVP, UVP, OCP, OTP, and UVLO. It is combined power good signal and output discharge function.

The MODE pin in the TPS51396A can be used to set Eco-Mode or OOA mode for light load operation. The Eco-Mode maintains high efficiency during light load operation, and OOA mode operations with switching frequency larger than 25 kHz even no loading.

The TPS51396A supports both an internal and external soft-start time option. It has the internal fixed soft-start time of 1.3 ms. If the application needs longer soft-start time, the external SS pin can be used to achieve it by connecting the external capacitor.

The TPS51396A is available in a 20-pin 3.0-mm × 3.0-mm HotRod package and the junction temperature is specified from –40°C to 125°C.

The TPS51396A is a cost-effective, high-voltage input, high-efficiency synchronous buck converter with integrated FETs.

The key feature of the TPS51396A is its ULQ (Ultra Low Quiescent) feature to enable low-bias current and large duty operation. The ULQ feature is extremely beneficial for long battery life in low power operation. The TPS51396A operates with a supply input voltage ranging from 4.5 V to 24 V. It uses DCAP3 control mode to provide a fast transient response, good line, load regulation, no requirement for external compensation, and supports low equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors.

The TPS51396A provides complete protection OVP, UVP, OCP, OTP, and UVLO. It is combined power good signal and output discharge function.

The MODE pin in the TPS51396A can be used to set Eco-Mode or OOA mode for light load operation. The Eco-Mode maintains high efficiency during light load operation, and OOA mode operations with switching frequency larger than 25 kHz even no loading.

The TPS51396A supports both an internal and external soft-start time option. It has the internal fixed soft-start time of 1.3 ms. If the application needs longer soft-start time, the external SS pin can be used to achieve it by connecting the external capacitor.

The TPS51396A is available in a 20-pin 3.0-mm × 3.0-mm HotRod package and the junction temperature is specified from –40°C to 125°C.

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Technical documentation

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* Data sheet TPS51396A 4.5-V to 24-V, 8-A Synchronous Step-Down Voltage Regulator with ULQ™ Mode for Extended Battery Life datasheet (Rev. C) PDF | HTML 27 Mar 2021
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
Application note Non-Isolated Point-of-Load Solutions for Tiger Lake in PC Applications (Rev. B) PDF | HTML 29 Apr 2021
EVM User's guide TPS51396AEVM User's Guide PDF | HTML 23 Mar 2021

Design & development

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Evaluation board

TPS51396AEVM — TPS51396A evaluation module 4.5-V to 24-V input, 8-A synchronous step-down converter

The TPS51396AEVM evaluation module (EVM) is used to evaluate the TPS51396A, a high-voltage input, high-efficiency synchronous buck converter with integrated FETs. The key feature of the TPS51396A is its ULQ™ (ultra low quiescent), which enables low-bias current and large duty (...)
User guide: PDF | HTML
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Simulation model

TPS51396A PSpice Transient Model

SLVMDM0.ZIP (295 KB) - PSpice Model
Package Pins CAD symbols, footprints & 3D models
VQFN-HR (RJE) 20 Ultra Librarian

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