User’s Guide
LM5158EVM-BST Evaluation Module
ABSTRACT
The LM5158EVM-BST evaluation module showcases the features and performance of the LM5158 device
as a wide input voltage, non-synchronous boost converter with dual random spread spectrum. The standard
configuration is designed to provide regulate a 12-V output at 1.2 A from an input of 3.3 V to 9 V (load derated by
half from < 6-V input), and switching at a frequency of 2.1 MHz.
Table of Contents
1 Features and Electrical Performance................................................................................................................................... 3
2 Application Schematic........................................................................................................................................................... 5
3 EVM Picture.............................................................................................................................................................................6
4 Test Setup and Procedure......................................................................................................................................................7
5 Test Results.............................................................................................................................................................................8
6 Design Files...........................................................................................................................................................................14
List of Figures
Figure 2-1. Application Circuit......................................................................................................................................................5
Figure 3-1. EVM Picture.............................................................................................................................................................. 6
Figure 4-1. Test Setup................................................................................................................................................................. 7
Figure 5-1. Efficiency vs Load......................................................................................................................................................8
Figure 5-2. Load Regulation........................................................................................................................................................ 8
Figure 5-3. Thermal Image: VIN = 3.3 V, IOUT = 0.6 A, VBIAS = 3.3 V, No Forced Air Cooling......................................................9
Figure 5-4. Thermal Image: VIN = 3.3 V, IOUT = 0.6 A, VBIAS = 12 V, No Forced Air Cooling.......................................................9
Figure 5-5. Thermal Image: VIN = 6 V, IOUT = 1.2 A, VBIAS = 6 V, No Forced Air Cooling............................................................9
Figure 5-6. Steady State, VIN = 3.3 V, IOUT = 0.6 A................................................................................................................... 10
Figure 5-7. Steady State, VIN = 6 V, IOUT = 1.2 A...................................................................................................................... 10
Figure 5-8. Steady State, VIN = 9 V, IOUT = 1.2 A...................................................................................................................... 10
Figure 5-9. Start-Up, VIN = 3.3 V, IOUT = 0.6 A...........................................................................................................................11
Figure 5-10. Start-Up, VIN = 6 V, IOUT = 1.2 A............................................................................................................................11
Figure 5-11. Start-Up, VIN = 9 V, IOUT = 1.2 A............................................................................................................................ 11
Figure 5-12. Load Transient, VIN = 3.3 V, IOUT = 0.4 A to 0.8 A.................................................................................................12
Figure 5-13. Load Transient, VIN = 6 V, IOUT = 0.6 A to 1.2 A....................................................................................................12
Figure 5-14. Load Transient, VIN = 9 V, IOUT = 0.6 A to 1.2 A....................................................................................................12
Figure 5-15. Control Loop Response, VIN = 3.3 V, IOUT = 0.6 A................................................................................................ 13
Figure 5-16. Control Loop Response, VIN = 6 V, IOUT = 0.6 A................................................................................................... 13
Figure 5-17. Control Loop Response, VIN = 9 V, IOUT = 1.2 A................................................................................................... 13
Figure 6-1. Top Layer and Silkscreen........................................................................................................................................ 14
Figure 6-2. Top Layer.................................................................................................................................................................14
Figure 6-3. Signal Layer 1......................................................................................................................................................... 14
Figure 6-4. Signal Layer 2......................................................................................................................................................... 14
Figure 6-5. Bottom Layer........................................................................................................................................................... 14
Figure 6-6. Bottom Layer and Silkscreen.................................................................................................................................. 14
Figure 6-7. LM5158EVM-BST Schematic..................................................................................................................................15
List of Tables
Table 1-1. Electrical Performance Standard Configuration..........................................................................................................3
Table 1-2. Jumper Description..................................................................................................................................................... 4
Table 4-1. Standard Configuration Jumper Connections............................................................................................................. 7
Table 6-1. LM5158EVM-BST Bill of Materials............................................................................................................................16
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SNVU783 – OCTOBER 2021
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