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LM5145 Datasheet(PDF) 41 Page - Texas Instruments

Part # LM5145
Description  LM25139 42V, Synchronous Buck DC/DC Controller With Dual Random Spread Spectrum for Advanced EMI Mitigation
PDF  60 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM5145 Datasheet(HTML) 41 Page - Texas Instruments

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7.2.2.3 Application Curves
Load Current (A)
0
1
2
3
4
5
6
7
8
9
10
11
12
75
80
85
90
95
100
Vin = 8V
Vin = 12V
Vin = 18V
3.3V output
Figure 7-14. FPWM Efficiency vs IOUT
Load Current (A)
0.001
0.01
0.1
1
10
50
60
70
80
90
100
Vin = 8V
Vin = 12V
Vin = 18V
3.3V output
Figure 7-15. PFM Efficiency vs IOUT, Log Scale
12A resistive load
Figure 7-16. Full-load Switching
No load
Figure 7-17. PFM Switching
VIN step to 12V
12A resistive load
Figure 7-18. Start-Up Characteristic
VIN = 12V
12A resistive load
Figure 7-19. ENABLE ON and OFF Characteristic
www.ti.com
LM25139
SLVSJ80 – OCTOBER 2025
Copyright © 2025 Texas Instruments Incorporated
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Product Folder Links: LM25139



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