TPS56221 High-Current SWIFT™

Texas Instruments' 4.5 V to 14 V input, 25 A high current synchronous step-down converter with integrated FETs

Texas Instruments TPS56221 High-Current SWIFT Texas Instruments' TPS56221 is a high-efficiency and high-current synchronous buck converter designed to operate from a supply between 4.5 V and 14 V. The device is capable of producing an output voltage as low as 0.6 V at loads up to 25 A. Integrated NexFET™ Power MOSFETs provide a small footprint and ease of use. The device implements a voltage-mode control with voltage feed-forward compensation that responds instantly to input voltage change. The device offers design flexibility with a variety of user programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation. OCP levels are programmed by a single external resistor connected from the ILIM pin to the circuit ground.   TPS56221 Datasheet

  • 4.5 V to 14 V input voltage range
  • Incorporates power block technology
  • Up to 25 A output current
  • Fixed frequency options of 300 kHz, 500 kHz and 1 MHz
  • High-side and low-side MOSFET RDS(on) sensing
  • Programmable soft-start
  • 600 mV reference voltage with 1% accuracy
  • Voltage mode control with feed-forward
  • Supports pre-biased output
  • Thermal shutdown
  • 22-pin 5 mm x 6 mm PQFN PowerPAD package

Texas Instruments
Part Number
Part Number
Packaging Current - Output Voltage - Input Package  
TPS56221DQPT 296-28349-2-ND Tape & Reel 25 A 4.5 V ~ 14 V 22-LFDFN
Exposed Pad
TPS56221 Datasheet
296-28349-1-ND Cut Tape
296-28349-6-ND Digi-Reel
TPS56121DQPT 296-28348-2-ND Tape & Reel 15 A TPS56121 Datasheet
296-28348-1-ND Cut Tape
296-28348-6-ND Digi-Reel

Evaluation Modules
Texas Instruments
Part Number
Part Number
Description Photo  
TPS56221EVM-579 296-28389-ND TPS56221EVM-579 Evaluation Module TPS56221EVM-579 Photo TPS56221EVM-579 User's Guide
TPS56121EVM-601 296-28388-ND TPS56121EVM-601 Evaluation Module TPS56121EVM-601 Photo TPS56121EVM-601 User's Guide