TPS54340-Q1 Automotive 4.5V-42VIN, 3.5A, Step-Down Converter with Eco-mode™ | TI.com

TPS54340-Q1 (NRND)

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

 

Not Recommended for New Designs (NRND)

Replaced By TPS54340B-Q1 – The device is an EXACT EQUIVALENT in functionality and parametrics to the compared device.

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.

Description

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.

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

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Design tool

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer TPS54340-Q1

  Min   Max Range
Vin  V 4.5 to 42.0V
Vout  V 0.8 to 41V
Iout  A ≤ 3.5A
Ambient Temp  °C -40 to 125°C


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