LTC3731HG#PBF Linear Technology, LTC3731HG#PBF Datasheet - Page 34

• Manufacturer Part Number: LTC3731HG#PBF
• Description: IC SW REG CTRLR SYNC BUCK 36SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3731HG#PBF

• 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
• Primary Input Voltage: 7V
• No. Of Outputs: 1
• Output Voltage: 32V
• Output Current: 5A
• No. Of Pins: 36
• Operating Temperature Range: 0°C To +70°C
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -

LTC3731H
Typical applicaTion
PLLFLTR TO
relaTeD parTs
PART NUMBER
LTC3829
LTC3856
LTC3855
LTC3860
LTC3853
LTC3850/
LTC3850-1/
LTC3850-2

SHORT
SGND
V
V
SWITCHING FREQUENCY: 225kHz
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
IN
OUT
100pF
3.01k
: 9V TO 28V
: 5V AT 40A
20k
0.01µF
100pF
DESCRIPTION
3-Phase, Single Output, Synchronous Step-Down Controller
with Differential Amp and DCR Temperature Compensation
2-Phase, Single Output, Synchronous Step-Down Controller
with Differential Amp and DCR Temperature Compensation
Dual, Multiphase, Synchronous Step-Down DC/DC Controller
with Differential Amp and DCR Temperature Compensation
Dual, Multiphase, Synchronous Step-Down DC/DC Controller
with Differential Amp and Tri-State Output Drive
Triple Output, Multiphase Synchronous Step-Down DC/DC
Controller, R
Dual 2-Phase, High Efficiency Synchronous Step-Down DC/DC
Controller, R
10nF
147k
S1
S1
S2
S2
S3
S3
V
●
IN
+
–
+
–
–
+
FAX: [phone]
1000pF
1000pF
1000pF
SENSE
SENSE
18k
V
CC
or DCR Current Sensing and Tracking
or DCR Current Sensing and Tracking
1µF
I
TH
12k
10
11
12
13
14
15
16
17
18
C
C
D1 TO D3: DIODES INC. B340A
1
2
3
4
5
6
7
8
9
IN
OUT
: KEMET T521X476M035ATE070 4
V
PLLIN
PLLFLTR
FCB
NC
NC
NC
EAIN
SGND
SENSE1
SENSE1
SENSE2
SENSE2
SENSE3
SENSE3
RUN/SS
I
UVADJ
: SANYO 6TPE220MI 3
TH
CC
●
LTC3731HG
www.linear.com
+
–
+
–
–
+
PHASMD
BOOST1
BOOST2
BOOST3
PGOOD
10
PGND
SGND
SW1
SW2
SW3
BG1
BG2
BG3
CLK
TG1
TG2
V
TG3
DR
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
NC
3731H TA02
1µF
0.1µF
V5
L1 TO L3: 2.2µH WURTH 7443320220
M1, M3, M5: RJK0305DPB
M2, M4, M6: RJK0330DPB
0.1µF
0.1µF
V5
COMMENTS
4.5V ≤ V
Shedding
4.5V ≤ V
Shedding
Phase-Lockable Fixed Frequency 250kHz to 770kHz, 4.5V ≤ V
0.8V ≤ V
Operates with Power Blocks, DRMOS Devices or External MOSFETs
3V ≤ V
Phase-Lockable Fixed 250kHz to 750kHz Frequency, 4V ≤ V
V
Phase-Lockable Fixed 250kHz to 780kHz Frequency, 4V ≤ V
0.8V ≤ V
10µF
1
V5
OUT3
PGOOD
up to 13.5V
IN
47k
IN
IN
OUT
OUT
≤ 24V, t
≤ 38V, 0.8V ≤ V
≤ 38V, 0.8V ≤ V
M1
M2
M3
M4
M5
M6
≤ 12V
≤ 5.25V
ON(MIN)
V5
5V TO 7V
V
V
V
IN
IN
IN
D1
D2
D3
L1
L2
L3
= 20ns
S1
S2
S3
OUT
OUT
+
+
+
0.003
0.003
0.003
≤ 5V, Active Voltage Positioning, Stage
≤ 5V, Active Voltage Positioning, Stage
 LINEAR TECHNOLOGY CORPORATION 2010
S1
S2
S3
–
–
–
LT 0510 REV B • PRINTED IN USA
47µF
10V
4.7µF
50V
5V AT 40A
3
6
V
OUT
+
+
C
C
47µF
35V
IN
4
OUT
IN
IN
IN
≤ 24V,
≤ 30V,
V
9V TO 28V
IN
≤ 38V,
3731Hfb