LTC3731H Linear Technology, LTC3731H Datasheet - Page 2

• Manufacturer Part Number: LTC3731H
• Description: Synchronous Buck Switching Regulator Controller
• Manufacturer: Linear Technology

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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
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
temperature range, otherwise specifications are at T
SYMBOL
Main Control Loop
V
V
I
V
V
g
g
V
2
MATCH
TH
m
mOL
REGULATED
SENSEMAX
LOADREG
REFLNREG
FCB
Voltage ................................................ 2.4V to –0.3V
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
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
• Z
ITH
●
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
RUN/SS
SENSE2
SENSE2
SENSE3
TH
TH
PLLFLTR
SENSE1
SENSE1
SENSE3
– = 0.6V, 1.8V
RUN/SS
UVADJ
T
PLLIN
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2V
SGND
JMAX
PINS 5 AND 6 CAN BE GROUNDED OR NC
EAIN
V
FCB
= 5V unless otherwise noted.
I
NC
NC
NC
CC
TH
+
–
+
–
–
+
= 140°C, θ
PIN 7 MUST BE LEFT AS NC
36-LEAD PLASTIC SSOP
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
G PACKAGE
TOP VIEW
JA
= 95°C/W, θ
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
JC
●
●
●
●
●
●
= 32°C/W
CLKOUT
PGOOD
BOOST1
TG1
SW1
BOOST2
TG2
SW2
V
BG1
PGND
BG2
BG3
SW3
TG3
BOOST3
PHASMD
SGND
DR
0.594
0.590
MIN
0.54
65
60
–5
3
U
0.600
0.600
–0.1
0.03
0.60
TYP
75
75
0.1
5
3
ORDER PART
LTC3731HG
W
NUMBER
0.606
0.614
MAX
–0.7
0.66
85
90
0.7
5
7
UNITS
mmho
U
3731hf
MHz
%/V
mV
mV
%
%
%
V
V
V