LTC1709EG-85 Linear Technology, LTC1709EG-85 Datasheet - Page 9

• Manufacturer Part Number: LTC1709EG-85
• Description: IC SW REG SYNC STEP-DWN 36-SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1709EG-85

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.3 ~ 3.5 V
• Current - Output: 3A
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency - Switching: -
• Other names: LTC1709EG85

FU CTIO AL DIAGRA
f
IN
U
V
R
C
IN
5V
+
LP
LP
ATTENOUT
PLLFLTR
DIFFOUT
ATTENIN
PGOOD
EXTV
INTV
PLLIN
SGND
V
V
FCB
V
OS
OS
IN
CC
–
+
0.18 A
CC
50k
U
10k
3V
OSCILLATOR
4.8V
PHASE DET
0.80V
4.5V
R1
+
–
–
+
A1
+
–
–
+
–
–
CLK1
CLK2
TO SECOND
CHANNEL
+
+
INTERNAL
SUPPLY
V
LDO
REG
5V
REF
0.86V
EAIN
0.74V
FCB
VID25mV
W
VID0
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
5-BIT VID DECODER
VID1
6V
1.2 A
VID2
4(V
0.86V
FB
SLOPE
COMP
)
VID3
I
S
R
1
0.55V
–
+
Q
Q
–
TYPICAL ALL
40k
DROP
VID PINS
OUT
DET
45k
+
–
+
B
4(V
SHDN
+
RST
FB
)
BOT
V
TOP ON
–
BIAS
SHDN
FCB
START
45k
SOFT
RUN
OV
+
–
2.4V
EA
I
2
SWITCH
–
+
+
–
LOGIC
V
FB
0.80V
0.86V
TOP
BOT
INTV
CC
INTV
30k
30k
CC
SENSE
SENSE
RUN/SS
BOOST
PGND
EAIN
SW
TG
BG
I
TH
+
–
INTV
CC
C
C
D
C2
C
C
B
B
C
R
LTC1709-85
SS
C
V
IN
R
SENSE
D1
+
C
IN
170985f
9