LTC3707 Linear Technology, LTC3707 Datasheet - Page 9

• Manufacturer Part Number: LTC3707
• Description: High Efficiency / 2-Phase Synchronous Step-Down Switching Regulator
• Manufacturer: Linear Technology

FU CTIO AL DIAGRA
R6
R5
U
+
V
5V
SEC
FREQSET
STBYMD
3.3V
PGOOD
EXTV
INTV
SGND
FCB
V
IN
OUT
CC
0.18 A
CC
U
3V
OSCILLATOR
4.8V
+
–
1.19V
0.8V
4.5V
1M
+
–
–
+
+
–
–
–
CLK1
CLK2
+
+
INTERNAL
SUPPLY
V
LDO
REG
5V
REF
0.86V
V
0.74V
BINH
FCB
FB
W
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
1.2 A
6V
4(V
0.86V
FB
SLOPE
COMP
)
I1
S
R
+
–
0.55V
Q
Q
–
DROP
OUT
DET
45k
Figure 2
–
+
+
4(V
SHDN
+
RST
FB
B
3mV
)
BOT
TOP ON
–
SHDN
FCB
START
45k
SOFT-
RUN
–
+
OV
2.4V
EA
I2
SWITCH
–
+
+
–
LOGIC
V
FB
0.80V
0.86V
TOP
BOT
INTV
CC
INTV
30k
30k
CC
V
SENSE
SENSE
RUN/SS
BOOST
PGND
OSENSE
SW
TG
BG
I
TH
+
–
INTV
CC
R1
D
C
C
C
B
D
R2
C2
SS
B
C
SEC
C
V
IN
R
C
R
D
LTC3707
SENSE
1
+
C
SEC
C
IN
9
3707f