LTC3728EG#PBF Linear Technology, LTC3728EG#PBF Datasheet - Page 10
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LTC3728EG#PBF
Manufacturer Part Number
LTC3728EG#PBF
Description
IC SW REG SYNC STP-DN DUAL28SSOP
Manufacturer
Linear Technology
Series
PolyPhase®r
Type
Step-Down (Buck)r
Datasheet
1.LTC3728EGPBF.pdf
(36 pages)
Specifications of LTC3728EG#PBF
Internal Switch(s)
No
Synchronous Rectifier
Yes
Number Of Outputs
2
Voltage - Output
0.8 ~ 5.5 V
Current - Output
3A
Frequency - Switching
250kHz ~ 550kHz
Voltage - Input
3.5 ~ 36 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-SSOP
Primary Input Voltage
36V
No. Of Outputs
2
Output Voltage
36V
Output Current
3A
No. Of Pins
28
Operating Temperature Range
-40°C To +85°C
Msl
MSL 1 - Unlimited
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Available stocks
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Part Number
Manufacturer
Quantity
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FUNCTIONAL DIAGRAM
LTC3728
10
R6
R5
V
F
IN
+
IN
R
V
C
5V
SEC
LP
LP
PLLFLTR
PGOOD
3.3V
EXTV
INTV
PLLIN
SGND
FCB
V
IN
OUT
50k
CC
0.18μA
CC
1.5V
OSCILLATOR
4.7V
PHASE DET
+
–
4.5V
0.8V
+
–
+
–
–
+
CLK1
CLK2
INTERNAL
–
+
–
+
–
+
–
+
SUPPLY
V
LDO
REG
5V
REF
0.86V
0.74V
0.86V
0.74V
BINH
FCB
V
V
OSENSE1
OSENSE2
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
1.2μA
6V
4(V
0.86V
FB
SLOPE
COMP
)
I1
S
R
+
–
0.55V
Q
Q
–
DROP
Figure 2
OUT
DET
45k
+
–
+
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
BG
I
TG
TH
+
–
INTV
CC
R1
D
C
C
C
B
D
R2
C2
SS
B
C
SEC
C
V
IN
R
C
R
D
SENSE
1
+
+
C
C
IN
SEC
+
3728fg