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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

Vin (min) (V) 4.5 Vin (max) (V) 24 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iout (max) (A) 7 Iq (typ) (mA) 0.08 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 Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode D-CAP3 Duty cycle (max) (%) 97 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 24 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iout (max) (A) 7 Iq (typ) (mA) 0.08 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 Operating temperature range (°C) -40 to 125 Rating Catalog Regulated outputs (#) 1 Control mode D-CAP3 Duty cycle (max) (%) 97 Type Converter
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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* 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
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
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019

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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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