TIDUF09
December 2022
Description
Resources
Features
Applications
5
1
System Description
1.1
Key System Specifications
2
System Overview
2.1
Block Diagram
2.2
Design Considerations
2.3
Theory of Operation
2.4
Highlighted Products
2.4.1
TPS7A57 Low Dropout (LDO) Regulator
2.4.2
LMG1020 Low Side Driver
3
Hardware, Software, Testing Requirements, and Test Results
3.1
Hardware Requirements
3.2
Test Setup
3.2.1
Optional Load Transient Circuit Operation
3.3
Test Results
3.3.1
Current Sharing
3.3.2
VLOAD vs ILOAD
3.3.3
Load Transient Response
3.3.4
Current Limit
3.3.5
Startup
3.3.6
Noise
3.3.7
PSRR
3.3.8
Thermal
3.3.9
Thermal Limit Protection
4
Design and Documentation Support
4.1
Design Files
4.1.1
Schematics
4.1.2
BOM
4.2
Tools
4.3
Documentation Support
4.4
Support Resources
4.5
Trademarks
5
About the Author
3.3.7
PSRR
V
IN
= 1.05 V
Figure 3-20
3x LDOs in Parallel: PSRR vs. Frequency and I
OUT
V
IN
= 1.05 V
Figure 3-21
PSRR vs. Frequency and I
OUT
for 3x Parallel TPS7A57 and 1x Single TPS7A57
