TIDT387 March   2024 LM25148-Q1 , LM74910-Q1 , TPS389006-Q1 , TPS62874-Q1 , TPS62875-Q1 , TPS62876-Q1 , TPS62877-Q1 , TPS746-Q1 , TPS7B69-Q1

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
  6. 2Testing and Results
    1. 2.1 Efficiency and Power Loss Graphs
    2. 2.2 VCCINT - Core Rail Current Sharing Tolerances
    3. 2.3 Thermal Images
    4. 2.4 Dimensions
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-Up Sequence
    5. 3.5 Front-End Protection (FEP) Test Results

1.1 Voltage and Current Requirements

Table 1-1 shows the power rail specifications including voltages and tolerances, load currents, and sequence order for each of the power rails pertaining to the VE2302 device. This reference design was designed to meet all AI Edge Series power delivery specifications.
Table 1-1 VE2302 Device Power Rail Specifications
Rail NameVoltageDC Spec.AC Spec.CurrentStepSequence #
VCCINT, VCC_SOC0.8V±1%±17mV39A33%2
VCCO1.5V±1%±5%3A100%1
VCCAUX1.5V±1%10mVPP1.1A100%3
GTAVCC, MGTYAVCC0.88V±2%10mVPP0.7A70%4
GTAVTT, MGTYATT1.2V±2%10mVPP1.3A70%6
GTAVCCAUX, MGTYAVCCAUX1.5V±2%10mVPP0.05A70%5

Table 1-2 shows the voltages, currents, and switching frequencies pertaining to the reference design.

Table 1-2 Reference Design Overall Electrical Specifications
ParametersSpecifications
VIN9VDC to 18VDC Continuous
(6VIN Minimum Crank;
42VIN Maximum Load Dump)
VOUT (Buck 5V Pre-Regulator)5VDC
IOUT (Buck 5V Pre-Regulator)12A Maximum
FSW (Buck Pre-Regulator)440kHz Nominal
VOUT (VCCINT, VCC SOC)0.8VDC
IOUT (VCCINT, VCC SOC)39A Maximum
FSW (VCCINT, VCC SOC)2.25MHz per phase (4.5MHz effective interleaved)
VOUT (VCCO)1.0VDC
IOUT (VCCO)3A
FSW (VCCO)4.4MHz
VOUT (VCCAUX)1.5VDC
IOUT (VCCAUX)1.1A
FSW (VCCAUX)4.4MHz Nominal
VOUT (GTAVCC, MGTYAVCC)0.88VDC
IOUT (GTAVCC, MGTYAVCC)0.7A
FSW (GTAVCC, MGTYAVCC)2.2MHz Nominal
VOUT (GTAVTT, MGTYAVTT)1.2VDC
IOUT (GTAVTT, MGTYAVTT)1.3A
FSW (GTAVCC, MGTYAVCC)4.4MHz Nominal
VOUT (GTAVCCAUX, MGTYAVCCAUX)1.5VDC
IOUT (GTAVCCAUX, MGTYAVCCAUX)0.05A
FSW (GTAVCCAUX, MGTYAVCCAUX)0Hz (LDO)