LTC1709-9 Linear Technology, LTC1709-9 Datasheet - Page 9

• Manufacturer Part Number: LTC1709-9
• Description: 2-Phase/ 5-Bit VID/ Current Mode/ High Efficiency/ Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

FU CTIO AL DIAGRA
f
IN
U
V
R
C
IN
+
5V
LP
LP
ATTENOUT
DIFFOUT
ATTENIN
PLLLPF
EXTV
PGOOD
INTV
PLLIN
SGND
V
V
V
OS
OS
IN
CC
–
+
CC
50k
U
20k (LTC1709-8)
10k (LTC1709-9)
OSCILLATOR
4.7V
PHASE DET
R1
–
+
+
–
0.80V
A1
–
–
CLK1
CLK2
+
+
INTERNAL
SUPPLY
V
LDO
REG
5V
REF
0.86V
EAIN
0.74V
VID0
W
VID1
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
5-BIT VID DECODER
VID2
6V
1.2 A
VID3
4(V
0.86V
FB
SLOPE
COMP
)
VID4
I
S
R
1
–
+
Q
Q
–
TYPICAL ALL
40k
DROP
VID PINS
OUT
DET
45k
+
4(V
SHDN
RST
FB
)
BOT
FORCE BOT
V
BIAS
SHDN
START
45k
SOFT
RUN
OV
2.4V
EA
SWITCH
–
+
+
–
LOGIC
LTC1709-8/LTC1709-9
0.80V
0.86V
TOP
BOT
INTV
CC
INTV
30k
30k
CC
SENSE
SENSE
BOOST
RUN/SS
PGND
EAIN
SW
TG
BG
I
TH
+
–
C
C
INTV
R
SENSE
CC
C
R
D
SS
L
C
C
B
B
V
IN
+
9
C
IN