ltc3890-1 Linear Technology Corporation, ltc3890-1 Datasheet - Page 10

• Manufacturer Part Number: ltc3890-1
• Description: 60v Low Iq, Dual, 2-phase Synchronous Step-down Dc/dc Controller
• Manufacturer: Linear Technology Corporation

PLLIN/MODE
LTC3890-1
FUNCTIONAL DIAGRAM
10
PGOOD1
EXTV
FREQ
V
IN
4.7V
CC
+
–
20μA
100k
EN
5.1V
LDO
+
–
+
–
SGND
0.88V
0.72V
V
SYNC
FB1
DET
EN
C
5.1V
LDO
LP
VCO
INTV
CC
CLK1
CLK2
PFD
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
RUN
11V
7μA (RUN1)
0.5μA (RUN2)
0.65V
2.7V
SLOPE COMP
2(V
ICMP
SHDN
RST
FB
S
R
0.425V
)
–
+
–
Q
Q
+
FOLDBACK
DROP
OUT
DET
+
–
3mV
+ –
TOP ON
SHDN
SLEEP
BOT
+
–
OV
IR
SWITCH
SHDN
LOGIC
EA
+
–
+
–
TOP
BOT
0.80V
TRACK/SS
0.88V
INTV
1μA
CC
TRACK/SS
SENSE
SENSE
BOOST
PGND
SW
V
ITH
TG
BG
FB
+
–
INTV
R
CC
A
C
C
C
D
C
C2
C
SS
R
B
B
B
V
L
IN
R
C
D
R
SENSE
C
IN
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