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TPS51388

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4.5-V to 24-V input, 12-A synchronous buck converter with adjustable output

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Data sheet

TPS51388

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 4.5 Vin (max) (V) 24 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 1000 Features Enable, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO Fixed Control mode D-CAP3 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 90 Duty cycle (max) (%) 98
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 12 Vin (min) (V) 4.5 Vin (max) (V) 24 Switching frequency (min) (kHz) 600 Switching frequency (max) (kHz) 1000 Features Enable, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO Fixed Control mode D-CAP3 Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 90 Duty cycle (max) (%) 98
VQFN-HR (VAB) 13 12 mm² 4 x 3
  • 4.5V to 24V input voltage range
  • 0.6V to 5.5V output voltage
  • Integrated 9.2mΩ and 4.5mΩ FETs
  • Support 12A continuous output current
  • 90uA low quiescent current
  • ± 1.0% reference voltage accuracy (25°C)
  • D-CAP3™ control mode architecture control for fast transient response
  • Support POSCAP and all MLCC output capacitor
  • Selectable Eco-mode and Out-of-Audio™ mode with dynamic change
  • ULQ™ extended battery life during system standby
  • Built-in output discharge function
  • Integrated power-good indicator
  • 600kHz and 1MHz selectable switching frequency
  • Fixed 1.0ms soft-start time
  • Large duty cycle operation
  • Cycle-by-cycle overcurrent and negative overcurrent protection
  • Latched output OV and UV protections
  • Non-latched UVLO and OT protections
  • –20°C to 125°C operating junction temperature
  • 13-pin 3.0mm × 4.0mm HotRod™ VQFN package
  • Create a custom design using the TPS51388 with the WEBENCH Power Designer
  • 4.5V to 24V input voltage range
  • 0.6V to 5.5V output voltage
  • Integrated 9.2mΩ and 4.5mΩ FETs
  • Support 12A continuous output current
  • 90uA low quiescent current
  • ± 1.0% reference voltage accuracy (25°C)
  • D-CAP3™ control mode architecture control for fast transient response
  • Support POSCAP and all MLCC output capacitor
  • Selectable Eco-mode and Out-of-Audio™ mode with dynamic change
  • ULQ™ extended battery life during system standby
  • Built-in output discharge function
  • Integrated power-good indicator
  • 600kHz and 1MHz selectable switching frequency
  • Fixed 1.0ms soft-start time
  • Large duty cycle operation
  • Cycle-by-cycle overcurrent and negative overcurrent protection
  • Latched output OV and UV protections
  • Non-latched UVLO and OT protections
  • –20°C to 125°C operating junction temperature
  • 13-pin 3.0mm × 4.0mm HotRod™ VQFN package
  • Create a custom design using the TPS51388 with the WEBENCH Power Designer

The device is a monolithic, 12A, synchronous buck converter with integrated MOSFETs that enable high efficiency and offer ease-of-use with minimum external component count for space-conscious power systems.

The TPS51388 employs D-CAP3 control mode that provides fast transient response and excellent line and load regulation with internal compensation. The ULQ extended battery life 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 EN pin can be used to set Eco-mode or Out-of-Audio (OOA) mode for light-load operation. 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 EN pin can be toggled dynamically, even when the converter is in operation.

The TPS51388 integrates a power-good indicator and provides an output discharge function. The TPS51388 provides complete protection including OVP, UVP, OCP, OTP, and UVLO. The device is available in a 13-pin, 3.0mm × 4.0mm HotRod package, and the junction temperature is specified from –20°C to 125°C.

The device is a monolithic, 12A, synchronous buck converter with integrated MOSFETs that enable high efficiency and offer ease-of-use with minimum external component count for space-conscious power systems.

The TPS51388 employs D-CAP3 control mode that provides fast transient response and excellent line and load regulation with internal compensation. The ULQ extended battery life 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 EN pin can be used to set Eco-mode or Out-of-Audio (OOA) mode for light-load operation. 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 EN pin can be toggled dynamically, even when the converter is in operation.

The TPS51388 integrates a power-good indicator and provides an output discharge function. The TPS51388 provides complete protection including OVP, UVP, OCP, OTP, and UVLO. The device is available in a 13-pin, 3.0mm × 4.0mm HotRod package, and the junction temperature is specified from –20°C to 125°C.

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Technical documentation

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* Data sheet TPS51388 4.5V to 24V, 12A, Synchronous Buck Converter datasheet PDF | HTML 04 Sep 2024
EVM User's guide TPS51388 Step-Down Converter Evaluation Module User's Guide PDF | HTML 03 Sep 2024

Design & development

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Evaluation board

TPS51388EVM — TPS51388 evaluation module

The TPS51388EVM is a fully assembled and tested circuit for evaluating the TPS51388 converter. The evaluation module is configured to operate from input voltage range of 5.5V to 24V and produce a regulated 5.15V output with up to 12A load current. Most settings of the device can be easily adjusted (...)
User guide: PDF | HTML
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Simulation model

TPS51388 PSpice Transient Model

SLUM916.ZIP (129 KB) - PSpice Model
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Package Pins CAD symbols, footprints & 3D models
VQFN-HR (VAB) 13 Ultra Librarian
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