LTC3608 Datasheet, PDF (9/24 Pages) Linear Technology – 18V, 8A Monolithic Synchronous Step-Down DC/DC Converter

FUNCTIONAL DIAGRAM
R_ON
V_ON
I_ON
FCB
13
22
19
0.7V
2.4V
1μA
EXTV_CC
29
4.7V
+–
V_RNG
17
t_ON
=
V_VON
I_ION
(10pF)
20k
I_CMP
1.4V
×
(0.5 TO 2)
0.7V
0.6V
–+
F
R
SQ
+
I_REV
–
FCNT
ON
SWITCH
LOGIC
SHDN
OV
LTC3608
SV_IN
30
PV_IN
0.6V
1, 2, 3, 4, 5, 6,
REF
7, 48, 49, 50,
51, 52, 53
5V
C_IN
REG
INTV_CC
31, 32
BOOST
11
M1
C_B
SW
D_B
L1
8, 33, 41, 42,
43, 44, 45,
46, 47, 55
+
C_OUT
M2
C_VCC
PGND
34, 35, 36, 37,
38, 39, 40
16 PGOOD
V_OUT
1
240k
I_THB
Q2 Q4
Q6
Q3 Q1
+– _0.8V
×3.3
EA
1V
SS
–+
0.6V
18
I_TH
0.54V
UV
RUN
SHDN
OV
0.66V
1.2μA
6V
0.4V
12
RUN/SS
C_SS
V_FB
23
SGND
10, 14, 15,
20, 26, 27, 54
27 NC
9, 21, 24,
25, 28
3608 FD
R2
R1
3608fa
9