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TPS51385

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4.5-V to 24-V input, 7-A synchronous step-down voltage regulator with on-time D-CAP3 control

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Data sheet

TPS51385

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 7 Vin (min) (V) 4.5 Vin (max) (V) 24 Switching frequency (min) (kHz) 1000 Switching frequency (max) (kHz) 1000 Features Enable, Fixed Output, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, UVLO Fixed Control mode D-CAP3 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (A) 0.00008
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 7 Vin (min) (V) 4.5 Vin (max) (V) 24 Switching frequency (min) (kHz) 1000 Switching frequency (max) (kHz) 1000 Features Enable, Fixed Output, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, UVLO Fixed Control mode D-CAP3 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (A) 0.00008
VQFN-HR (RJN) 12 6 mm² 3 x 2
  • 4.5-V to 24-V input voltage range
  • 0.6-V to 5.5-V output voltage range
  • Integrated 22-mΩ and 11-mΩ MOSFETs
  • Support 7-A continuous I OUT
  • 84-µA low quiescent current
  • ±1% reference voltage (0.6 V) at 25°C
  • ±1.5% reference voltage (0.6 V) at –40°C to 125°C
  • 1-MHz switching frequency
  • D-CAP3™ control mode for fast transient response
  • Supports POSCAP and all MLCC output capacitor
  • Adjustable soft start and internal 1-ms soft start
  • Selectable PSM and Out-of-Audio™ (OOA) mode under light load and supports on-the-fly change
  • Large duty operation support
  • Power-good indicator to monitor output voltage
  • Latched output OV and UV protection
  • Non-latched UVLO and OT protection
  • Cycle-by-cycle overcurrent protection
  • Built-in output discharge feature
  • Small 2.00-mm × 3.00-mm HotRod™ QFN package
  • Pin-to-pin compatible with TPS51386 (24 V, 8 A)
  • 4.5-V to 24-V input voltage range
  • 0.6-V to 5.5-V output voltage range
  • Integrated 22-mΩ and 11-mΩ MOSFETs
  • Support 7-A continuous I OUT
  • 84-µA low quiescent current
  • ±1% reference voltage (0.6 V) at 25°C
  • ±1.5% reference voltage (0.6 V) at –40°C to 125°C
  • 1-MHz switching frequency
  • D-CAP3™ control mode for fast transient response
  • Supports POSCAP and all MLCC output capacitor
  • Adjustable soft start and internal 1-ms soft start
  • Selectable PSM and Out-of-Audio™ (OOA) mode under light load and supports on-the-fly change
  • Large duty operation support
  • Power-good indicator to monitor output voltage
  • Latched output OV and UV protection
  • Non-latched UVLO and OT protection
  • Cycle-by-cycle overcurrent protection
  • Built-in output discharge feature
  • Small 2.00-mm × 3.00-mm HotRod™ QFN package
  • Pin-to-pin compatible with TPS51386 (24 V, 8 A)

The TPS51385 is a monolithic, 7-A, synchronous buck converter with adaptive on-time D-CAP3 control mode. Integrated low R DS(on) power MOSFETs enable high efficiency and offer ease-of-use with minimum external component count for space-constrained power systems. Features include an accurate reference voltage, fast load transient response, auto-skip mode operation for light load efficiency, OOA light load operation with > 25-kHz switching frequency, D-CAP3 control mode with good line, load regulation, and does not require external compensation.

The TPS51385 provides complete protection OVP, UVP, OCP, OTP and UVLO. The device is combined power-good signal and output discharge function.

The TPS51385 supports both internal and external soft-start time options. The device has the internal fixed soft-start time 1 ms. If the application needs longer soft-start time, the external SS pin can be used to achieve longer soft-start time by connecting the external capacitor.

The TPS51385 are available in a thermally enhanced 12-pin QFN package and are designed to operate from –40°C to 125°C junction temperature.

The TPS51385 is a monolithic, 7-A, synchronous buck converter with adaptive on-time D-CAP3 control mode. Integrated low R DS(on) power MOSFETs enable high efficiency and offer ease-of-use with minimum external component count for space-constrained power systems. Features include an accurate reference voltage, fast load transient response, auto-skip mode operation for light load efficiency, OOA light load operation with > 25-kHz switching frequency, D-CAP3 control mode with good line, load regulation, and does not require external compensation.

The TPS51385 provides complete protection OVP, UVP, OCP, OTP and UVLO. The device is combined power-good signal and output discharge function.

The TPS51385 supports both internal and external soft-start time options. The device has the internal fixed soft-start time 1 ms. If the application needs longer soft-start time, the external SS pin can be used to achieve longer soft-start time by connecting the external capacitor.

The TPS51385 are available in a thermally enhanced 12-pin QFN package and are designed to operate from –40°C to 125°C junction temperature.
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Technical documentation

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* Data sheet TPS51385 4.5-V to 24-V Input, 7-A Synchronous Buck Converter With Latched OVP/UVP, Adjustable Soft Start, and PSM/OOA Modes datasheet PDF | HTML 24 Aug 2023
Application note D-CAP2 and D-CAP3 Loop Analysis With Hybrid Output Capacitors PDF | HTML 22 Dec 2023
Certificate TPS51385EVM EU Declaration of Conformity (DoC) 23 Aug 2023
EVM User's guide TPS51385 Step-Down Converter Evaluation Module User's Guide PDF | HTML 18 Aug 2023

Design & development

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Evaluation board

TPS51385EVM — TPS51385 evaluation module, 4.5-V to 24-V, 7-A synchronous step-down converter

The TPS51385 evaluation module (EVM) is a single, synchronous buck converter providing 5.1 V at 7 A from 6 V to 24 V input with D-CAP3™ mode and a very low external component count.

User guide: PDF | HTML
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VQFN-HR (RJN) 12 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

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