LM5145 datasheet(39/70 Pages) TI

부품명	LM5145

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

PDF	70 Pages

Scroll/Zoom	100%

제조업체	TI [Texas Instruments]

홈페이지	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

TI's technical articles.

www.ti.com

LM5148

SNVSC01 – FEBRUARY 2023

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LM5145 데이터시트(PDF) 39 Page - Texas Instruments