TIDT289
July 2022
Description
Features
Applications
1
Test Prerequisites
1.1
Voltage and Current Requirements
1.2
Considerations
1.3
Dimensions
2
Testing and Results
2.1
Efficiency Graphs
2.2
Load Regulation
2.2.1
Output Voltage 1 (1.1 V)
2.2.2
Output Voltage 2 (3.3 V)
2.3
Thermal Images
2.4
Bode Plots
2.4.1
Output Voltage 1 (1.1 V at 6 A)
2.4.2
Output Voltage 2 (3.3 V at 1 A)
3
Waveforms
3.1
Switching
3.1.1
Output Voltage 1 (1.1 V at 6 A)
3.1.1.1
Test Point TP3may be TP3 can be linked to the schematic which will be uploaded with the design (Pin SW_B0)
3.1.1.2
Test Point TP9may be TP9 can be linked to the schematic which will be uploaded with the design (Pin SW_B1)
3.1.2
Output Voltage 2 (3.3 V at 1 A)
3.2
Output Voltage Ripple
3.2.1
VOUT1 (1.1 VD at 6 A) and VOUT2 (3.3 V at 1 A)
3.2.2
VOUT3 (2.5 V at 0.3 A) and VOUT4 (1.1 V at 0.4 A)
3.3
Input Voltage Ripple
3.4
Load Transients
3.4.1
Switching Load on Output Voltage 1 (1.1 VD)
3.4.1.1
Output Voltage 1 (VOUT1)
3.4.1.2
Cross Talking on VOUT2 (3.3 V)
3.4.2
Switching Load on Output Voltage 2 (3.3 V)
3.5
Start-Up Sequence
3.5.1
Hot Plug-In
3.5.2
Enable with Switch S1
3.5.2.1
All Traces
3.5.2.2
Without VOUT1
3.5.2.3
Without VOUT4
3.6
Shutdown Sequence
3.6.1
Hot Plug Off
3.6.2
Disable With Switch S1
3.6.2.1
All Traces
3.6.2.2
Without VOUT1
3.6.2.3
Without VOUT4
Features
Automotive power supply to energize a custom ASIC out of 5-V input
I/O, to enable a
LMK00804
level translator, for example
Individual sequencing, first 3.3 V, then 2.5 V, and then 1.1 V (buck and LDO), the start-up of the 1.1-V outputs are delayed 11 ms
Dual-stage differential input filter to attenuate switching frequency and harmonics as well as RF noise
I²C bus for control and monitoring on the fly