LT1371 Linear Technology, LT1371 Datasheet - Page 2

• Manufacturer Part Number: LT1371
• Description: 500kHz High Efficiency 3A Switching Regulator
• Manufacturer: Linear Technology

A
Supply Voltage ....................................................... 30V
Switch Voltage
S/S, SHDN, SYNC Pin Voltage ................................ 30V
Feedback Pin Voltage (Transient, 10ms) .............. 10V
Feedback Pin Current ........................................... 10mA
Negative Feedback Pin Voltage
LT1371
PACKAGE/ORDER I FOR ATIO
Consult factory for Military grade parts.
V
SYMBOL
I
2
ELECTRICAL C
V
FB
GND
IN
TAB
REF
BSOLUTE
LT1371 ............................................................... 35V
LT1371HV .......................................................... 42V
(Transient, 10ms) ............................................. 10V
IS
= 5V, V
WITH PACKAGE SOLDERED TO 0.5 INCH
AREA OVER BACKSIDE GROUND PLANE OR INTERNAL
POWER PLANE.
> 40 C/W DEPENDING ON MOUNTING TECHNIQUE
GND
TAB
IS
T
JMAX
7-LEAD PLASTIC DD
PARAMETER
Reference Voltage
Feedback Input Current
Reference Voltage Line Regulation
C
T
JMAX
= 125 C,
= 0.6V, V
FRONT VIEW
R PACKAGE
7-LEAD TO-220
FRONT VIEW
= 125 C,
T7 PACKAGE
JA
CAN VARY FROM 20 C/W TO
JA
W
= 50 C/W,
FB
7
6
5
4
3
2
1
JA
= V
A
7
6
5
4
3
2
1
= 30 C/W
HARA TERISTICS
XI
REF
JC
, V
W
2
= 4 C/W
COPPER
V
S/S
V
GND
NFB
FB
V
SW
IN
SW
C
U
C
U
, S/S, SHDN, SYNC and NFB pins open, unless otherwise noted.
W
V
S/S
V
GND
NFB
FB
V
IN
SW
C
R
A
W
LT1371CT7
LT1371HVCT7
LT1371IT7
LT1371HVIT7
ORDER PART
ORDER PART
TI
LT1371CR
LT1371HVCR
LT1371IR
LT1371HVIR
NUMBER
NUMBER
U
G
S
CONDITIONS
Measured at Feedback Pin
V
V
2.7V V
C
FB
U
= 0.8V
= V
REF
IN
25V, V
Operating Ambient Temperature Range ...... 0 C to 70 C
Operating Junction Temperature Range
Storage Temperature Range ................ – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)................. 300 C
0.75 INCH
OF 1 OZ COPPER ON A DOUBLE-SIDED BOARD
JA
WILL VARY FROM APPROXIMATELY 40 C/W WITH
Commercial .......................................... 0 C to 125 C
Industrial ......................................... – 40 C to 125 C
Short Circuit ......................................... 0 C to 150 C
SHDN
SYNC
GND
GND
GND
GND
C
NFB
V
V
FB
2
= 0.8V
IN
C
OF 1 OZ COPPER TO 50 C/W WITH 0.33 INCH
10
20-LEAD PLASTIC SO WIDE
T
1
2
3
4
5
6
7
8
9
JMAX
= 125 C,
SW PACKAGE
TOP VIEW
JA
= 50 C/W
1.230
1.225
20
19
18
17
16
15
14
13
12
11
MIN
V
NC
V
GND
GND
GND
GND
NC
NC
GND
SW
SW
1.245
1.245
2
0.01
TYP
250
LT1371CSW
LT1371HVCSW
LT1371ISW
LT1371HVISW
ORDER PART
NUMBER
1.260
1.265
MAX
0.03
550
900
UNITS
%/V
nA
nA
V
V