TEXAS INSTRUMENTS  TPS54340DDA  DC-DC Switching Step Down Regulator, Adjustable, 4.5V-42Vin, 0.8V-41Vout, 3.5Aout, SOIC-8


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Product Overview

The TPS54340DDA is an adjustable output step down DC to DC converter with Eco-mode in 8 pin SO PowerPAD package. This step down regulator integrates a 92mohm high side MOSFET. The device survives load dump pulses up to 45V 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 146µA. Shutdown supply current is reduced to 1µA when enable pin is pulled low. Undervoltage lockout is internally set at 4.3V but can be increased using enable pin. The output voltage start up ramp is internally controlled to provide controlled start up and eliminate overshoot. A wide switching frequency range allows either efficiency or external component size to be optimized. Frequency foldback and thermal shutdown protects internal and external components during an overload condition. The TPS54340DDA is supported by WEBENCH software tool.
  • Input voltage range from 4.5V to 42V (45V absolute maximum)
  • Adjustable output voltage range from 0.8V to 41.1V
  • 3.5A continuous current and 4.5A minimum peak inductor current limit
  • High efficiency at light loads with pulse skipping Eco-mode
  • Low dropout at light loads with integrated BOOT recharge FET
  • 100KHz to 2.5MHz fixed switching frequency
  • Synchronizes to external clock
  • Adjustable UVLO voltage and hysteresis
  • Internal soft start and accurate cycle by cycle current limit
  • Operating temperature range from -40°C to 125°C


Power Management; Industrial; Automotive; Communications & Networking
This device has limited built-in ESD protection. The leads should be shorted together or device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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Product Information

  • Input Voltage Min 4.5V
  • Input Voltage Max 42V
  • No. of Outputs 1Outputs
  • DC / DC Converter IC Case SOIC
  • No. of Pins 8Pins
  • Output Current 3.5A
  • Output Voltage Min 800mV
  • Output Voltage Max 41V
  • Switching Frequency 2.5MHz
  • Topology Buck (Step Down)
  • Operating Temperature Max 125°C
  • Packaging Cut Tape
  • MSL MSL 2 - 1 year
  • Operating Temperature Min -40 °C
  • Primary Input Voltage 42 V
  • SVHC No SVHC (15-Jun-2015)
  • CAD CadSoft_EAGLE (2.59KB) EN
  •   Simulation Model (60.87KB) EN
  • Availability

    Availability:  127

    • 127 in stock for same day shipping
    Check stock and lead times
      More stock available week commencing 6/20/16

    Price for: Each

    Minimum order quantity: 1

    Order multiple quantity: 1

    Price: $4.89 $4.89



    Quantity List Price
    1 - 9 $4.89
    10 - 24 $4.33
    25 - 49 $4.04
    50 - 99 $3.82
    100 - 249 $3.55
    250 - 499 $3.37
    500 - 999 $3.02
    1000+ $2.28

    Legislation and Environmental

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