TPS54340B-Q1

ACTIVE

Automotive, 4.5V to 42V Input, 3.5A Step-Down Converter With Eco-Mode™

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Automotive, 4.5V to 42V Input, 3.5A Step-Down Converter With Eco-Mode™

TPS54340B-Q1

ACTIVE

Product details

Parameters

Vin (Min) (V) 4.5 Vin (Max) (V) 42 Vout (Min) (V) 0.8 Vout (Max) (V) 41 Iout (Max) (A) 3.5 Regulated outputs (#) 1 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 2500 Features Enable, Frequency Synchronization, Light Load Efficiency, Over Current Protection, Soft Start Adjustable, UVLO Adjustable Control mode Current Mode Duty cycle (Max) (%) 98 Type Converter Operating temperature range (C) -40 to 125 Rating Automotive open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 open-in-new Find other Buck converters (integrated switch)

Features

  • 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 HSOP With PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Supported by WEBENCH® Software Tool
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Description

The TPS54340B-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 µ 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 TPS54340B-Q1 device is available in an 8-pin thermally-enhanced HSOP PowerPAD package.

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Download

Technical documentation

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Type Title Date
* Datasheet TPS54340B-Q1 4.5-V to 42-V Input, 3.5-A, Step-Down DC-DC Converter With Eco-Mode™ datasheet Jan. 25, 2017
Application notes NRND & Differences TPS54340/360/540/560 and TPS54340B/360B/540B/560B Apr. 05, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
User guides Test Report for the iPad Automotive Charger Jun. 11, 2013
Application notes Level Shifting Control for an Inverting Buck-boost Oct. 10, 2012
Application notes Creating GSM Power Supply from TPS54260 Apr. 30, 2010

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

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.

Features

4.5 V to 42 V Input Supply Voltage

Integrated 90-mΩ High Side N-Channel MOSFET

146 µA Operating Quiescent Current

2 µA Shutdown Current

100 kHz to 2.5 MHz Switching Frequency

Adjustable UVLO Voltage and Hysteresis

Design tools & simulation

SCHEMATICS Download
SNVC107.PDF (82 KB)

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

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