LM5145 datasheet(44/70 Pages) TI

Part #	LM5145

Description	LM5148 80-V, Synchronous, Buck DC/DC Controller with Ultra-Low IQ and Dual Random Spread Spectrum

PDF	70 Pages

Scroll/Zoom	100%

Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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44 / 70 page

9.2.2.3 Application Curves

Load (A)

100

VIN = 24 V

VIN = 36 V

VIN = 48 V

VIN = 60 V

12-V output

Figure 9-18. Efficiency vs. IOUT

Load (A)

0.001

0.01

0.1

100

VIN = 24 V

VIN = 36 V

VIN = 48 V

VIN = 60 V

12-V output

Figure 9-19. Efficiency vs. IOUT, Log Scale

SW 20V/DIV

VOUT 50mV/DIV

1 µs/DIV

8-A resistive load

Figure 9-20. Full load Switching

SW 20V/DIV

VOUT 200mV/DIV

5 ms/DIV

No load

Figure 9-21. PFM Switching

1 ms/DIV

VIN 10 V/DIV

VOUT 2 V/DIV

IOUT 2 A/DIV

PG 5 V/DIV

VIN step to 48 V

8-A resistive load

Figure 9-22. Start-Up Characteristic

20 ms/DIV

VOUT 50 mV/DIV

VIN 20V/DIV

VIN ramps from 24 to 72 V

4-A load

Figure 9-23. Line Transient Response to VIN = 72 V

LM5148

SNVSC01 – FEBRUARY 2023

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LM5145 Datasheet(PDF) 44 Page - Texas Instruments

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