LTC3609 Datasheet, PDF (9/24 Pages) Linear Technology – 32V, 6A Monolithic Synchronous Step-Down DC/DC Converter

LTC3609
FUNCTIONAL DIAGRAM
R_ON
V_ON
I_ON
13
22
0.7V
2.4V
FCB
19
4.7V
1μA
+
V_RNG
17
t_ON
=
V_VON
I_ION
(10pF)
20k
I_CMP
1.4V
s
(0.5 TO 2)
0.7V
0.6V
–+
F
R
SQ
+
I_REV
–
EXTV_CC
29
–
FCNT
ON
SWITCH
LOGIC
SHDN
OV
SV_IN
30
PV_IN
0.6V
1, 2, 3, 4, 5,
REF
6, 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
s3.3
EA
1V
SS
–+
RUN
SHDN
R2
0.54V
UV
OV
0.66V
1.2μA
6V
23
V_FB
R1
SGND
10, 14, 15, 20,
26, 27, 54
NC
9, 21, 24, 25, 28
0.6V
18
I_TH
0.4V
12
RUN/SS
C_SS
3609 FD
3609f
9