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
p ´
ea
O
gm
C =
2 BW (Hz)
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
Type2A Type2B Type1
C2
R3
C1
TPS57040-Q1
SLVSAP4C –DECEMBER 2010–REVISED OCTOBER 2012 www.ti.com
DETAILED DESCRIPTION (continued)
Figure 48. Types of Frequency Compensation
Figure 49. Frequency Response of the Type 2A and Type 2B Frequency Compensation
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