Automotive 2.95-V to 6-V, 3-A, 2-MHz synchronous buck converter

Automotive 2.95-V to 6-V, 3-A, 2-MHz synchronous buck converter



Product details


Vin (Min) (V) 2.95 Vin (Max) (V) 6 Vout (Min) (V) 0.8 Vout (Max) (V) 4.5 Iout (Max) (A) 3 Iq (Typ) (uA) 515 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2000 Features Enable, Forced PWM, Frequency Synchronization, Power Good Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

WQFN (RTE) 16 9 mm² 3 x 3 open-in-new Find other Buck converters (integrated switch)


  • AEC-Q100-qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Two 12-mΩ (typical) MOSFETs for high efficiency at 3-A loads
  • 200-kHz to 2-MHz switching frequency
  • 0.8 V ± 1% voltage reference over temperature (–40°C to +150°C)
  • Synchronizes to external clock
  • Adjustable slow start and sequencing
  • UV and OV power-good output
  • –40°C to +150°C operating junction temperature range
  • Thermally enhanced 3-mm × 3-mm 16-pin WQFN
  • Pin compatible to TPS54418

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The TPS54388C-Q1 device is a full-featured 6-V, 3-A, synchronous step-down current-mode converter with two integrated MOSFETs.

The TPS54388C-Q1 device enables small designs by integrating the MOSFETs, implementing current-mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced QFN package.

The TPS54388C-Q1 device provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (Vref) over temperature.

The integrated 12-mΩ MOSFETs and 515-µA typical supply current maximize efficiency. Entering shutdown mode using the enable pin reduces shutdown supply current to 5.5 µA, typical.

The internal undervoltage lockout setting is at 2.45 V, but programming the threshold with a resistor network on the enable pin can increase the setting. The slow-start pin sets the output-voltage start-up ramp. An open-drain power-good signal indicates when the output is within 93% to 107% of its nominal voltage.

Frequency foldback and thermal shutdown protect the device during an overcurrent condition.

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Technical documentation

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Type Title Date
* Data sheet TPS54388C-Q1 Automotive 2.95-V to 6-V, 3-A , 2-MHz Synchronous Buck Converter datasheet (Rev. A) Nov. 29, 2019
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Functional safety information TPS54388C-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) Nov. 30, 2020
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Technical article How to power next-generation ADAS camera modules Sep. 11, 2018
Technical article Use a low-quiescent-current switcher for high-voltage conversion Aug. 28, 2018
Technical article Let’s break it down: how buck converters make your power supply more flexible Dec. 13, 2017
Application note TPS57112-Q1 High Frequency (2.35 MHz) Operation May 31, 2016
Application note Enable Functionality and Adjusting Under Voltage Lockout for TPS57112-Q1 Device May 05, 2016
Application note Interfacing TPS57xxx-Q1 and TPS65320-Q1 Family Devices With Low Impendence Exter Dec. 08, 2015
User guide TPS54388EVM User's Guide Nov. 14, 2013

Design & development

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Hardware development

document-generic User guide

The TPS54388-Q1 DC/DC converter is designed to provide up to a 3-A output from an input voltage source of 2.95 V to 6 V. This evaluation module is designed to demonstrate the small printed-circuit-board (PCB) areas that may be achieved when designing with the TPS54388-Q1 regulator. The switching (...)

  • Adjustable output voltage (down to 0.8V)
  • Adjustable slow start
  • 2 MHz Switching Frequency (adjustable down to 200 kHz)
  • Optimized for fast load transient response
  • Adjustable undervoltage lockout

Design tools & simulation

SLVM780A.ZIP (37 KB) - PSpice Model
SLVM821A.ZIP (59 KB) - PSpice Model
SLVM859.ZIP (57 KB) - TINA-TI Spice Model
SLVM860.TSC (179 KB) - TINA-TI Reference Design
SLVM992.TSC (57 KB) - TINA-TI Reference Design
SLVMAF3.ZIP (11 KB) - IBIS Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

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WQFN (RTE) 16 View options

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