LTC3731HG Linear Technology, LTC3731HG Datasheet - Page 2

• 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

ELECTRICAL CHARACTERISTICS
ABSOLUTE AXI U RATI GS
LTC3731H
(Note 1)
Topside Driver Voltages (BOOST
Switch Voltage (SW
Boosted Driver Voltage (BOOST
Peak Output Current <1ms (TG
Supply Voltages (V
Pin Voltage .................................................. 7V to –0.3V
RUN/SS, PLLFLTR, PLLIN, UVADJ,
FCB Voltages ............................................. V
SENSE
I
Operating Junction
Temperature Range (Note 2) .................–40°C to 140°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature G Package (Soldering, 10sec).. 300°C
SYMBOL
Main Control Loop
V
V
I
V
V
g
g
V
temperature range, otherwise specifications are at T
2
MATCH
TH
m
mOL
REGULATED
SENSEMAX
LOADREG
REFLNREG
FCB
Voltage ................................................ 2.4V to –0.3V
+
, SENSE
PARAMETER
Regulated Voltage at EAIN
Maximum Current Sense Threshold
Maximum Current Threshold Match
Output Voltage Load Regulation
Output Voltage Line Regulation
Transconductance Amplifier g
Transconductance Amplifier GBW
Forced Continuous Threshold
–
Voltages ........................ 5.5V to –0.3V
W
CC
N
)................................... 32V to –5V
, V
DR
), PGOOD
W W
N
N
, BG
N
– SW
) ............ 38V to –0.3V
m
N
) ..................... 5A
N
) .... 7V to –0.3V
CONDITIONS
V
V
V
Worst-Case Error at V
(Note 3)
Measured in Servo Loop, ∆I
Measured in Servo Loop, ∆I
V
I
I
TH
TH
ITH
EAIN
SENSE1
CC
U
= 1.2V, Sink/Source 25µA (Note 3)
= 1.2V (g
CC
= 4.5V to 7V
= 1.2V (Note 3)
A
= 0.5V, V
= 25°C. V
to –0.3V
–
,
V
SENSE2
The
m
ITH
• Z
●
L
CC
–
Open,
, Z
,
denotes the specifications which apply over the full operating
V
L
= V
SENSE3
SENSEMAX
= Series 1k-100kΩ-1nF)
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
RUN/SS
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
TH
TH
– = 0.6V, 1.8V
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2V
= 5V unless otherwise noted.
SENSE2
SENSE2
SENSE3
PLLFLTR
SENSE1
SENSE1
SENSE3
T
RUN/SS
PINS 5 AND 6 CAN BE GROUNDED OR NC
JMAX
UVADJ
ORDER PART NUMBER
PLLIN
SGND
EAIN
FCB
V
NC
NC
NC
I
CC
TH
= 140°C, θ
+
–
+
–
–
+
PIN 7 MUST BE LEFT AS NC
http://www.linear.com/leadfree/
36-LEAD PLASTIC SSOP
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
LTC3731HG
●
●
●
●
●
●
G PACKAGE
TOP VIEW
JA
= 95°C/W, θ
0.594
0.590
0.54
MIN
65
60
–5
3
U
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
JC
CLKOUT
PGOOD
BOOST1
TG1
SW1
BOOST2
TG2
SW2
V
BG1
PGND
BG2
BG3
SW3
TG3
BOOST3
PHASMD
SGND
= 32°C/W
0.600
0.600
DR
–0.1
0.03
0.60
TYP
75
75
0.1
5
3
W
0.606
0.614
MAX
–0.7
0.66
85
90
0.7
5
7
UNITS
mmho
3731hfa
U
MHz
%/V
mV
mV
%
%
%
V
V
V