SLVU097B October   2003  – October 2021 TPS54350

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Background
    2. 1.2 Performance Specification Summary
    3. 1.3 Modifications
      1. 1.3.1 Output Voltage Setpoint
      2. 1.3.2 Switching Frequency
      3. 1.3.3 Input Filter
      4. 1.3.4 UVLO Programming
      5. 1.3.5 Synchronization
      6. 1.3.6 Power Good
      7. 1.3.7 Synchronous Low-Side FET
      8. 1.3.8 Optional Output Filtering
  3. 2Test Setup and Results
    1. 2.1  Input/Output Connections
    2. 2.2  Efficiency
    3. 2.3  Power Dissipation
    4. 2.4  Output Voltage Regulation
    5. 2.5  Load Transients
    6. 2.6  Loop Characteristic
    7. 2.7  Output Voltage Ripple
    8. 2.8  Input Voltage Ripple
    9. 2.9  Gate Drive
    10. 2.10 Powering Up and Down
  4. 3Board Layout
    1. 3.1 Layout
  5. 4Schematic and Bill of Materials
    1. 4.1 Bill of Materials
  6. 5Revision History

1.2 Performance Specification Summary

A summary of the TPS54350EVM-235 performance specifications is provided in Table 1-2. Specifications are given for an input voltage of 12 V and an output voltage of 3.3 V, unless otherwise specified. The ambient temperature is 250°C for all measurements, unless otherwise noted. The maximum input voltage for the TPS54350 is 4.5 V to 20 V. The EVM operates over this range but is designed and tested for 6-V to 18-V input range (12-V nominal).

Table 1-2 TPS54350EVM-235 Performance Specification Summary
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNITS
Input voltage range 8.0 12.0 18 V
Output voltage set point 3.3 V
Output current range VI = 3 V to 5.5 V 0 3 A
Line regulation IO = 0–3 A, VI = 6 V to 18 V ±1%
Load regulation VI = 12 V, IO = 0 A to 3 A ±0.05%
Load transient Voltage change IO = 0.75 A to 2.25 A –10 mVPK
Recovery time 60 μs
Voltage range IO = 2.25 A to 0.75 A 11 mVPK
Recovery time 60 μs
Loop bandwidth VI = 6 V 28 kHz
Phase margin VI = 6 V 70 °
Loop bandwidth VI = 18 V 32 kHz
Phase margin VI = 18 V 60 °
Input ripple voltage 400 mVPP
Output ripple voltage 40 mVPP
Output rise time 2.8 ms
Operating frequency 500 kHz
Maximum efficiency VI = 6.0 V, VO = 3.3 V, IO = 1.0 A 87%