LTC3868 Linear Technology, LTC3868 Datasheet - Page 10

• Manufacturer Part Number: LTC3868
• Description: Low IQ Dual 2-Phase Synchronous Step-Down Controller
• Manufacturer: Linear Technology

LTC3868
FuncTional DiagraM
0
PLLIN/MODE
PGOOD1
PGOOD2
EXTV
FREQ
I
V
LIM
27
14
28
22
20
2
5
IN
4.7V
CC
+
–
20µA
100k
EN
5.1V
LDO
6
–
–
–
–
+
+
+
+
SGND
0.88V
0.72V
0.88V
0.72V
V
V
SYNC
FB1
FB2
DET
CURRENT
LIMIT
EN
C
5.1V
LDO
19
LP
PHASMD
VCO
INTV
3
CC
CLK1
CLKOUT
CLK2
PFD
4
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
RUN
7, 8
0.5µA
0.55V
2.7V
SLOPE COMP
2(V
ICMP
11V
SHDN
RST
FB
S
R
0.425V
)
–
+
SHORT CKT
–
LATCH-OFF
Q
Q
+
FOLDBACK
DROP
OUT
DET
+
–
3mV
+ –
TOP ON
SHDN
SLEEP
BOT
+
–
OV
IR
SWITCH
SHDN
10µA
LOGIC
EA
–
–
+
+
TOP
BOT
0.80V
TRACK/SS
0.88V
INTV
1µA
CC
SENSE
SENSE
BOOST
24, 17
25, 16
26, 15
23, 18
PGND
32, 10
31, 11
30, 12
29, 13
SW
1, 9
V
BG
I
TG
SS
21
TH
FB
+
–
INTV
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R
CC
A
C
C
C
D
C
C2
SS
R
C
B
B
B
V
L
IN
R
C
D
R
SENSE
C
IN
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