SLVUAT2A November   2016  – February 2022 TPSM84A21 , TPSM84A22


  1.   Trademarks
  2. 1Description
  3. 2Getting Started
  4. 3Test Point Descriptions
  5. 4Operation Notes
  6. 5Performance Data
  7. 6Schematic
  8. 7Bill of Material
  9. 8PCB Layout
  10. 9Revision History


The TPSM84A21 and TPSM84A22 are synchronous buck power modules designed to provide up to 10 A of output current. The TPSM84A21 and TPSM84A22 power modules combine the TPS54A20, a 10-A DC/DC synchronous series capacitor buck converter with power MOSFETs, shielded inductors, input and output capacitors, and passive components into a low-profile package. The input voltage range of both devices is 8 V to 14 V. See the Minimum Input Voltage curve in the TPSM84A22, 8-V to 14-V Input, 1.2-V to 2.05-V Output, 10-A SWIFT Power Module Data Sheet for the minimum required input voltage for VOUT > 1.5 V. The output voltage ranges of both devices are given in Table 1-1. The output voltage of the EVM can be set to one of five popular values by using a configuration jumper.

This evaluation module is designed to demonstrate the ease-of-use and small printed-circuit board (PCB) area possible when designing with the TPSM84A21 and TPSM84A22 power modules. Monitoring test points are provided to allow measurement of the following:

  • Efficiency
  • Power dissipation
  • Input ripple
  • Output ripple
  • Line and load regulation
  • Transient response

Additionally, control test points are provided for use of the power good, inhibit control, and undervoltage lockout features of the device. The EVM uses a recommended PCB layout that maximizes thermal performance and minimizes output ripple and noise.

Table 1-1 Output Voltage Range
EVMOutput Voltage Range
TPSM84A21EVM-8080.55 V to 1.3 V
TPSM84A22EVM-8091.2 V to 2.05 V