LTC3727-1 Linear Technology, LTC3727-1 Datasheet - Page 2

• Manufacturer Part Number: LTC3727-1
• Description: 2-Phase Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

PACKAGE/ORDER I FOR ATIO
ABSOLUTE AXI U RATI GS
LTC3727/LTC3727-1
Input Supply Voltage (V
Top Side Driver Voltages
(BOOST1, BOOST2) ...................................42V to – 0.3V
Switch Voltage (SW1, SW2) .........................36V to – 5V
INTV
(BOOST2-SW2) ........................................8.5V to – 0.3V
RUN/SS1, RUN/SS2, PGOOD ..................... 7V to – 0.3V
SENSE1
SENSE2
PLLIN, PLLFLTR, FCB, Voltage ............ INTV
Consult LTC Marketing for parts specified with wider operating temperature ranges.
2
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
Main Control Loops
V
I
V
V
g
VOSENSE1, 2
m1, 2
OSENSE1, 2
REFLNREG
LOADREG
V
V
RUN/SS1
SENSE1
SENSE1
SENSE2
SENSE2
PLLFLTR
OSENSE1
3.3V
OSENSE2
PLLIN
CC,
SGND
I
I
FCB
OUT
TH1
TH2
+
–
–
+
EXTV
+
–
T
, SENSE2
JMAX
28-LEAD PLASTIC SSOP
10
11
12
13
14
Voltages .....................................14V to – 0.3V
1
2
3
4
5
6
7
8
9
PARAMETER
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
Transconductance Amplifier g
= 125 C,
CC
G PACKAGE
TOP VIEW
, (BOOST1-SW1),
W
JA
+
, SENSE1
= 95 C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
IN
).........................36V to – 0.3V
PGOOD
TG1
SW1
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
SW2
TG2
RUN/SS2
W W
IN
CC
CC
–
,
U
m
ORDER PART
LTC3727EG
LTC3727EG-1
NUMBER
W
CONDITIONS
(Note 4); I
(Note 4)
V
(Note 4)
Measured in Servo Loop; I
Measured in Servo Loop; I
I
TH1, 2
IN
U
= 3.6V to 30V (Note 4)
CC
A
= 1.2V; Sink/Source 5 A (Note 4)
= 25 C. V
to – 0.3V
TH1, 2
The
U
(Note 1)
Voltage = 1.2V
IN
V
PLLFLTR
OSENSE1
3.3V
denotes the specifications which apply over the full operating
= 15V, V
PLLIN
SGND
I
I
FCB
OUT
TH1
TH2
I
Peak Output Current <10 s (TG1, TG2, BG1, BG2) ... 3A
INTV
Operating Temperature Range (Note 2) .. – 40 C to 85 C
Junction Temperature (Note 3) ............................. 125 C
Storage Temperature Range ................. – 65 C to 150 C
Storage Temperature Range
(UH Package) ....................................... – 65 C to 125 C
Lead Temperature (Soldering, 10 sec).................. 300 C
TH1,
TH
TH
1
2
3
4
5
6
7
8
32-LEAD (5mm 5mm) PLASTIC QFN
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2.0V
RUN/SS1, 2
32 31 30 29 28 27 26 25
I
CC
9 10 11 12 13
TH2
(MUST BE SOLDERED TO PCB)
T
JMAX
Peak Output Current ................................ 50mA
EXPOSED PAD IS SGND
, V
= 125 C,
UH PACKAGE
OSENSE1
TOP VIEW
= 5V unless otherwise noted.
JA
= 34 C/W
14 15 16
, V
OSENSE2
24
23
22
21
20
19
18
17
0.792
MIN
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
IN
Voltages ...2.7V to – 0.3V
CC
www.DataSheet4U.com
CC
0.800
0.002
– 0.1
TYP
– 5
1.3
0.1
LTC3727EUH-1
ORDER PART
MARKING
NUMBER
UH PART
37271
0.808
MAX
– 0.5
0.02
– 50
0.5
UNITS
mmho
3727f
%/V
nA
%
%
V