over no higher than the lower of either 1/10 of the switching frequency, ƒSW, or 1/5 of the RHPZ frequency,

ƒRHPZ.

Then set the value of RC, CC, and CP (in Figure 9-1) by following these equations.

R

C=

2N×V

OUT×CO

×BC

:1-D;×VREF×GEA×KCOMP

(17)

where

• ƒC is the selected crossover frequency.

The value of CC can be set by Equation 18.

C

C=

R

O×CO

2R

C

(18)

The value of CP can be set by Equation 19.

C

P=

R

ESR×CO

R

C

(19)

If the calculated value of CP is less than 10 pF, it can be left open.

Designing the loop for greater than 45° of phase margin and greater than 10-dB gain margin eliminates output

voltage ringing during the line and load transient.

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TPS61376

SLVSGQ1A – JANUARY 2022 – REVISED SEPTEMBER 2022

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