LTC3605 LINER [Linear Technology], LTC3605 Datasheet - Page 7

• Manufacturer Part Number: LTC3605
• Description: 20V, 5A Synchronous Step-Down Regulator
• Manufacturer: LINER [Linear Technology]

BLOCK DIAGRAM
x =
INTV
1
V
RT
IN
R
CC
T
CLKIN
24
100k
PHMODE
PLL-SYNC
12 x OSC
2
(±30%)
PLL-SYNC
OSC
(±30%)
180k
35pF
I
1
ON
0.6V
REF
I
100K
0µA TO 10µA
THB
35pF
CLKOUT
3pF
23
Q1
+ +
t
ON
EA
I
3pF
ON
Q2
=
V
I
–
VON
ION
I
CMP
Q4
OST
0.6V
+
–
(0.64pF)
Q6
V
OUT
9
V
3.3µA
6
ON
–3.3µA TO 6.7µA
ITH
20k
6V
0.6V
–
R
FOLDBACK
C
x 4 + 0.6
SS
R
S
AT START-UP
FOLDBACK
DISABLED
+
–
Q
C
+
C1
+
–
I
REV
0.3V
1.2V
–
3
RUN
MODE
RUN
ON
OV
+
7
RUN
THROUGH
SWITCH
SHOOT
LOGIC
ANTI-
AND
INT
5
VCC
TRACK/SS
2µA
OV
UV
3.3V
REG
SENSE
–
+
+
–
SENSE
C
SS
+
TG
0.66V
BOOST
SV
11–16
19
–
BG
SW
C
20
PGOOD
IN
PGND
10, 25
VCC
3605A BD
8
0.54V
C
1
IN2
C
D
B
B
INTV
21
C
LTC3605A
IN
CC
M1
M2
17-18
PV
IN
SGND
FB
22
L1
4
C
OUT
3605af
7
R2
R1
V
OUT