LM5176PWPR datasheet(28/45 Pages) TI2

Part #	LM5176PWPR

Description	LM5176 55-V Wide VIN Synchronous 4-switch Buck-boost Controller

PDF	45 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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28 / 45 page

The standard values of compensation components are selected to be Rc1 = 10 kΩ and Cc1 = 33 nF.

A high frequency pole (fpc2) is placed using a capacitor (Cc2) in parallel with Rc1 and Cc1. Set the frequency of

this pole at seven to ten times of fbw to provide attenuation of switching ripple and noise on COMP while avoiding

excessive phase loss at the crossover frequency. For a target fpc2 = 28 kHz, Cc2 is calculated using Equation 46:

u S u

pc2

568 pF

(46)

Select a standard value of 560 pF for Cc2. These values provide a good starting point for the compensation

design. Each design should be tuned in the lab to achieve the desired balance between stability margin across

the operating range and transient response time.

LM5176

SNVSAI1D – JUNE 2017 – REVISED AUGUST 2021

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LM5176PWPR Datasheet(PDF) 28 Page - Texas Instruments