SLUUCG4 November   2022 TPS548C26

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Description
    2. 1.2 Before You Begin
  4. 2Performance Characteristics
  5. 3Test Point Descriptions
  6. 4Test Setup
  7. 5Configurations
    1. 5.1 Mode Selection
    2. 5.2 ILIM Selection
    3. 5.3 Soft-Start Selection
  8. 6Schematics
  9. 7PCB Layout
  10. 8BOM

2 Performance Characteristics

Table 2-1 provides a summary of the TPS548C26EVM performance characteristics. The TPS548C26EVM is designed and tested for VIN = 8 V to 16 V. Characteristics are given for an input voltage of VIN = 12 V and output voltage of 3.3 V, unless otherwise specified. The ambient temperature is room temperature (20°C to 25°C) for all measurements, unless otherwise noted.

Table 2-1 TPS548C26EVM Performance Characteristics Summary
SPECIFICATIONTEST CONDITIONSMINTYPMAXUNIT
VIN voltage range81216V
PVIN input currentPVIN = 12 V, internal VCC/VDRV, IO = 0 A, Pulse-skip mode15mA
VCC/VDRV input currentExternal 5-V bias, fSW = 800 kHz, PVIN = 12 V, IO = 35 A38mA
Output voltage setpoint

3.3

V
Output current rangeVIN = 8 V to 16 V035A
Output ripple voltagefSW = 800 kHz, IO = 35 A

28

mVPP
Output rise time1ms
Current limitSet by J1035A
Switching frequency (fSW)Set by J116008001200kHz
EfficiencyVIN = 12 V, external 5-V bias, fSW = 800 kHz, IO = 35 A

91

%
IC case temperatureVIN = 12 V, external 5-V bias, fSW = 1.2 MHz, IO = 35 A, 15-minute dwell time103°C
Figure 2-1 Efficiency, FCCM, Internal LDO
Figure 2-3 Efficiency, FCCM, External 5-V Bias
Figure 2-5 Efficiency, DCM. Internal LDO
Figure 2-7 Efficiency, DCM, External 5-V Bias
Figure 2-9 Load Regulation, FCCM, Internal LDO
Figure 2-11 Load Regulation, DCM, Internal VCC LDO
GUID-20221028-SS0I-43JV-L4RN-Z3DKLBFB9CJF-low.pngFigure 2-13 ENABLE Start-Up Waveform
GUID-20221028-SS0I-JJD7-R2PP-DVDPL2P8NTHJ-low.pngFigure 2-15 Output Voltage Ripple, 800-kHz FCCM, 35-A Load
GUID-20221028-SS0I-6X4V-V5DH-DPSLFL9BQNKV-low.pngFigure 2-17 Output Voltage Ripple, DCM, No Load
GUID-20221101-SS0I-GD6H-ZDGH-F5TCQVF74RT2-low.jpgFigure 2-19 Thermal Characteristics, 600-kHz FCCM, Internal LDO, 35-A Load
GUID-20221101-SS0I-QQ4F-RDRM-651CCQ3TSSR1-low.jpgFigure 2-21 Thermal Characteristics, 800-kHz FCCM, Internal LDO, 35-A Load
GUID-20221101-SS0I-TDLK-SXJ6-LNC7KML4VXLL-low.jpgFigure 2-23 Thermal Characteristics, 1.2-MHz FCCM, Internal LDO, 35-A Load
Figure 2-2 Power Dissipation, FCCM, Internal LDO
Figure 2-4 Power Dissipation, FCCM, External 5-V Bias
Figure 2-6 Power Dissipation, DCM, Internal LDO
Figure 2-8 Power Dissipation, DCM, External 5-V Bias
Figure 2-10 Load Regulation, FCCM, External 5-V Bias
Figure 2-12 Load Regulation, DCM, External 5-V Bias
GUID-20221028-SS0I-Z76T-CCWG-FJLGLQLSS07P-low.pngFigure 2-14 ENABLE Shutdown Waveform
GUID-20221028-SS0I-VN70-BDF6-RTB63HHFV2VM-low.pngFigure 2-16 Output Voltage Ripple, 800-kHz FCCM, No Load
GUID-20221028-SS0I-JVGZ-TPZX-N8TV9ZTCLT53-low.pngFigure 2-18 Output Voltage Ripple, DCM, 1-A Load
GUID-20221101-SS0I-4XS6-FSVJ-PLWHFXN3CRG9-low.jpgFigure 2-20 Thermal Characteristics, 600-kHz FCCM, External 5-V Bias, 35-A Load
GUID-20221101-SS0I-V1JN-WBK6-TQGBKBC1VKSK-low.jpgFigure 2-22 Thermal Characteristics, 800-kHz FCCM, External 5-V Bias, 35-A Load
GUID-20221101-SS0I-R95Q-MJ2J-QTSFRVQ95ZFW-low.jpgFigure 2-24 Thermal Characteristics, 1.2-MHz FCCM, External 5-V Bias, 35-A Load