LM5145 datasheet(39/70 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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39 / 70 page

Such a low capacitance value also helps to avoid output voltage overshoot when recovering from dropout

(when the input voltage is less than the output voltage setpoint and VCOMP is railed high).

3. Calculate CHF to create a pole at the ESR zero and to attenuate high-frequency noise at COMP. CBW is the

bandwidth-limiting capacitance of the error amplifier. CHF can not be significant enough to be necessary in

some designs, like this one. CHF can be unpopulated, or used with a small 22 pF for more noise filtering.

ESR

COMP

31 pF

0.8 pF

500kHz 10 k

(45)

Note

Set a fast loop with high RCOMP and low CCOMP values to improve the response when recovering from

operation in dropout.

For technical solutions, industry trends, and insights for designing and managing power supplies, please refer to

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LM5148

SNVSC01 – FEBRUARY 2023

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LM5145 Datasheet(PDF) 39 Page - Texas Instruments