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
Type2A Type2B Type1
C2
R3
C1
TPS54040A
SLVSB58A –MARCH 2012–REVISED JANUARY 2014
www.ti.com
DETAILED DESCRIPTION (continued)
Figure 49. Types of Frequency Compensation
Figure 50. Frequency Response of the Type 2A and Type 2B Frequency Compensation
(18)
(19)
(20)
(21)
(22)
(23)
28 Submit Documentation Feedback Copyright © 2012–2014, Texas Instruments Incorporated
Product Folder Links: TPS54040A