LTC3731HG Linear Technology, LTC3731HG Datasheet - Page 30

• Manufacturer Part Number: LTC3731HG
• Description: IC REG SW SYNC 3PH STPDWN 36SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3731HG

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 6 V
• Frequency - Switching: 225kHz ~ 680kHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 140°C
• Mounting Type: Surface Mount
• Package / Case: 36-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Output: -
• Power - Output: -
• Lead Free Status / Rohs Status: Not Compliant

LTC3731H
Typical applicaTions
V
0
IN
+
S1
S1
S2
S2
S3
S3
RUN/SS
+
–
+
–
+
–
R10 500
R11 500
R12 500
R13 500
R14 500
R15 500
C18
1µF
50V
V
8
5
OUT
RUN/SS
C7
0.1µF
IN
SHDN
R7
665k
R6
8.06k
+
LT3010
C4
1000pF
C5
1000pF
C6
1000pF
GND
V
IN
OUT
4
ADJ
+
R30
OPT
R16
10k
R4
0
1
2
220pF
3-Phase Boost Converter. V
C9
OPT
OPT
C3
1000pF
R3
R2
1M
R5
249k
C8
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
121k
R17
C19
1µF
10V
V
PLLIN
PLLFLTR
FCB
NC
NC
NC
EAIN
SGND
SENSE1
SENSE1
SENSE2
SENSE2
SENSE3
SENSE3
RUN/SS
I
UVADJ
10
TH
CC
R1
6.5V
LTC3731HG
+
–
+
–
–
+
1µF
C1
845k
R18
PHASMD
C53
1000pF
BOOST1
BOOST2
BOOST3
PGOOD
PGND
SGND
SW1
SW2
SW3
BG1
BG2
BG3
CLK
TG1
TG2
V
TG3
DR
V
IN
+
IN
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
= 10V to 18V with 36V Load Dump, V
C
C16-C26: 1µF , 100V X7R TAIYO YUDEN HMK432BJ105KM
C17: 150µF , 63V SANYO ALUMINUM ELECTROLYTIC 63MV150GX
C20: 33µF , 100V SANYO ALUMINUM ELECTROLYTIC 100CV33FS
L1-L3: 12µH SUMIDA CDRH127/LD-120
KEEP SEPARATE AND REFER TO PCB LAYOUT CHECKLIST
FOR ROUTING INFORMATION
IN4
-C
IS SIGNAL GROUND
6.5V
IN6
C1
4.7µF
: 10µF , 50V X5R TDK C5750X5R1H106M
L1
12µH
Q1
Si7852DP
R23
0.007
L3
12µH
Q3
Si7852DP
R23
0.007
30BQ060
D4
S1
S1
30BQ060
+
–
D4
S3
S3
IS POWER GROUND
+
–
L2
12µH
Q2
Si7852DP
R23
0.007
30BQ060
D4
S2
S2
OUT
+
–
= 50V at 3A
+
C17
150µF
63V
C16-C18,
C20-C26
1µF
100V
+
C
10µF
50V
C20
33µF
100V
IN4
V
-C
V
OUT
IN
IN6
+
+
3731H TA01
50V/3A
V
V
V
V
OUT
OUT
IN
IN
+
–
+
–
10V TO 18V
WITH 36V
LOAD DUMP
3731Hfb