SLVU479A
October 2011 – August 2021
TPS54821
Trademarks
1
Introduction
1.1
Background
1.2
Performance Specification Summary
1.3
Modifications
1.3.1
Output Voltage Setpoint
1.3.2
Slow-Start Time
1.3.3
Track In
1.3.4
Adjustable UVLO
1.3.5
Input Voltage Rails
2
Test Setup and Results
2.1
Input/Output Connections
2.2
Efficiency
2.3
Output Voltage Load Regulation
2.4
Output Voltage Line Regulation
2.5
Load Transients
2.6
Loop Characteristics
2.7
Output Voltage Ripple
2.8
Input Voltage Ripple
2.9
Powering Up
2.10
Pre-Bias Start-Up
2.11
Hiccup-Mode Current Limit
3
Board Layout
3.1
Layout
4
Schematic and Bill of Materials
4.1
Schematic
4.2
Bill of Materials
5
Revision History
4.1
Schematic
Figure 4-1
is the schematic for the TPS54821EVM-049.
Figure 4-1
TPS54821EVM-049 Schematic