Datasheet
1
P1
2 Ro C1
=
p ´ ´
ea
R2
A1 = gm Ro| | R3
R1 + R2
´ ´
ea
R2
A0 = gm Ro
R1 + R2
´ ´
f
f f
Z1
P1 P2
s
1
2
EA A0
s s
1 1
2 2
æ ö
+
ç ÷
p ´
è ø
= ´
æ ö æ ö
+ ´ +
ç ÷ ç ÷
p ´ p ´
è ø è ø
ea
OUT
gm
C =
2 BW (Hz)´p
ea
Aol(V/V)
Ro =
gm
A0
A1
P1
Z1
P2
Aol
BW
Vref
V
O
R1
R3
C1
C2
R2
C
O
R
O
gm
ea
COMP
VSENSE
Type2A Type2B Type1
C2
R3
C1
TPS54140
www.ti.com
SLVS889B –OCTOBER 2008–REVISED SEPTEMBER 2013
DETAILED DESCRIPTION (continued)
Figure 48. Types of Frequency Compensation
Figure 49. Frequency Response of the Type 2A and Type 2B Frequency Compensation
(18)
(19)
(20)
(21)
(22)
(23)
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