TPS54340DDA - 

DC-DC Switching Buck Step Down Regulator, Adjustable, 4.5V-42Vin, 800mV-41.1Vout, 3.5Aout, PPAD-8

TPS54340DDA - DC-DC Switching Buck Step Down Regulator, Adjustable, 4.5V-42Vin, 800mV-41.1Vout, 3.5Aout, PPAD-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.

Product Information

Buck (Step Down)
MSL 2 - 1 year
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