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TPS54340-Q1

NOT RECOMMENDED FOR NEW DESIGNS

Automotive 4.5V-42VIN, 3.5A, Step-Down Converter with Eco-mode™

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Data sheet
TPS54340-Q1 is not recommended for new designs
Although this product continues to be in production to support previous designs, we don't recommend it for new designs. Consider one of these alternates:
open-in-new Compare alternates
Drop-in replacement with upgraded functionality to the compared device
TPS54340B-Q1 ACTIVE Automotive, 4.5V to 42V Input, 3.5A Step-Down Converter With Eco-Mode™ Pin-compatible with the TPS54340-Q1.

TPS54340-Q1

NOT RECOMMENDED FOR NEW DESIGNS
Data sheet Order now

Product details

Vin (min) (V) 4.5 Vin (max) (V) 42 Vout (min) (V) 0.8 Vout (max) (V) 41 Iout (max) (A) 3.5 Iq (typ) (mA) 0.146 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Soft Start Adjustable, UVLO adjustable Operating temperature range (°C) -40 to 125 Rating Automotive Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
Vin (min) (V) 4.5 Vin (max) (V) 42 Vout (min) (V) 0.8 Vout (max) (V) 41 Iout (max) (A) 3.5 Iq (typ) (mA) 0.146 Switching frequency (min) (kHz) 100 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Soft Start Adjustable, UVLO adjustable Operating temperature range (°C) -40 to 125 Rating Automotive Regulated outputs (#) 1 Control mode current mode Duty cycle (max) (%) 98 Type Converter
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H1C
    • Device CDM ESD Classification Level C3B
  • High Efficiency at Light Loads With Pulse Skipping
    Eco-mode™
  • 92-mΩ High-Side MOSFET
  • 146-µA Operating Quiescent Current and 2-µA
    Shutdown Current
  • 100-kHz to 2.5-MHz Adjustable Switching
    Frequency
  • Synchronizes to External Clock
  • Low Dropout at Light Loads With Integrated
    BOOT Recharge FET
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8 V 1% Internal Voltage Reference
  • 8-Pin HSOIC With PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Supported by WEBENCH® Software Tool
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C
      Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H1C
    • Device CDM ESD Classification Level C3B
  • High Efficiency at Light Loads With Pulse Skipping
    Eco-mode™
  • 92-mΩ High-Side MOSFET
  • 146-µA Operating Quiescent Current and 2-µA
    Shutdown Current
  • 100-kHz to 2.5-MHz Adjustable Switching
    Frequency
  • Synchronizes to External Clock
  • Low Dropout at Light Loads With Integrated
    BOOT Recharge FET
  • Adjustable UVLO Voltage and Hysteresis
  • 0.8 V 1% Internal Voltage Reference
  • 8-Pin HSOIC With PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Supported by WEBENCH® Software Tool

The TPS54340-Q1 device is a 42-V, 3.5-A, step-down regulator with an integrated high-side MOSFET. The device survives load-dump pulses up to 45 V per ISO 7637. Current-mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no-load supply current to 146 µA. Shutdown supply current is reduced to 1 µA when the enable pin is pulled low.

Undervoltage lockout is internally set at 4.3 V but can be increased using an external resistor divider at the enable pin. The output voltage start-up ramp is internally controlled to provide a controlled start-up and eliminate overshoot.

A wide adjustable frequency range allows for optimization of either efficiency or external component size. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.

The TPS54340-Q1 device is available in an 8-pin thermally-enhanced HSOIC PowerPAD package.

The TPS54340-Q1 device is a 42-V, 3.5-A, step-down regulator with an integrated high-side MOSFET. The device survives load-dump pulses up to 45 V per ISO 7637. Current-mode control provides simple external compensation and flexible component selection. A low-ripple pulse-skip mode reduces the no-load supply current to 146 µA. Shutdown supply current is reduced to 1 µA when the enable pin is pulled low.

Undervoltage lockout is internally set at 4.3 V but can be increased using an external resistor divider at the enable pin. The output voltage start-up ramp is internally controlled to provide a controlled start-up and eliminate overshoot.

A wide adjustable frequency range allows for optimization of either efficiency or external component size. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.

The TPS54340-Q1 device is available in an 8-pin thermally-enhanced HSOIC PowerPAD package.
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Technical documentation

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Type Title Date
* Data sheet TPS54340-Q1 4.5-V to 42-V Input, 3.5-A, Step-Down DC-DC Converter With Eco-Mode™ datasheet (Rev. A) PDF | HTML 16 Nov 2015
Selection guide Automotive Infotainment EE Buck Converter/Controller Selection Guide (Rev. B) 15 Apr 2021
Application note NRND & Differences TPS54340/360/540/560 and TPS54340B/360B/540B/560B 05 Apr 2019
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
EVM User's guide Evaluation Module for the TPS54340-Q1 Step-Down Converter 24 Sep 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS54340-Q1EVM-593 — TPS54340-Q1EVM-593 Evaluation Module/Circut Board

The TPS54340-Q1EVM-593 is a fully assembled and tested circuit for evaluating the TPS54340-Q1 Step-Down Converter. The TPS54340-Q1EVM-593 operates from a 7V to 42V input (12V nominal) and provides a 5V output at 3.5A. Additional input filtering is used for reducing conducted emissions.

User guide: PDF
Not available on TI.com
Simulation model

TPS54340 PSpice Transient Model (Rev. A)

SLVM694A.ZIP (111 KB) - PSpice Model
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Simulation model

TPS54340 Unencrypted PSpice Transient Model

SLVMCT6.ZIP (5 KB) - PSpice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Reference designs

PMP4471 — Automotive USB Charger with Integrated Linear Droop Compensation Reference Design

The PMP4471 reference design provides detailed data for evaluating and verifying a USB charger, which uses a USB charge controller and a buck converter .  The design is capable of compensating for the effects on Vdroop when a smartphone / tablet is connected to the USB charger using a cable (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP4425 — Automotive USB Charger with Linear Droop Compensation Reference Design

The PMP4425 reference design provides detailed data for evaluating and verifying a USB charger, which uses a USB charge controller, a buck converter and a shunt amplifier. Additionally the design demonstrates an automotive USB charging port that offers short-to-battery protection. With the help of (...)
Test report: PDF
Schematic: PDF
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