LT1371 データシートの表示（PDF） - Linear Technology
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LT1371 Datasheet PDF : 16 Pages
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LT1371
ABSOLUTE AXI U RATI GS
Supply Voltage ....................................................... 30V
Switch Voltage
LT1371 ............................................................... 35V
LT1371HV .......................................................... 42V
S/S, SHDN, SYNC Pin Voltage ................................ 30V
Feedback Pin Voltage (Transient, 10ms) .............. ±10V
Feedback Pin Current ........................................... 10mA
Negative Feedback Pin Voltage
(Transient, 10ms) ............................................. ±10V
Operating Ambient Temperature Range ...... 0°C to 70°C
Operating Junction Temperature Range
Commercial .......................................... 0°C to 125°C
Industrial ......................................... – 40°C to 125°C
Short Circuit ......................................... 0°C to 150°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO
FRONT VIEW
7
VIN
6
S/S
TAB
5
VSW
IS
4
GND
GND
3
NFB
2
FB
1
VC
R PACKAGE
7-LEAD PLASTIC DD
TJMAX = 125°C, θJA = 30°C/W
WITH PACKAGE SOLDERED TO 0.5 INCH2 COPPER
AREA OVER BACKSIDE GROUND PLANE OR INTERNAL
POWER PLANE. θJA CAN VARY FROM 20°C/W TO
> 40°C/W DEPENDING ON MOUNTING TECHNIQUE
ORDER PART
NUMBER
LT1371CR
LT1371HVCR
LT1371IR
LT1371HVIR
FRONT VIEW
7
VIN
6
S/S
TAB
5
VSW
IS
4
GND
GND
3
NFB
2
FB
1
VC
T7 PACKAGE
7-LEAD TO-220
TJMAX = 125°C, θJA = 50°C/W, θJC = 4°C/W
Consult factory for Military grade parts.
ORDER PART
NUMBER
LT1371CT7
LT1371HVCT7
LT1371IT7
LT1371HVIT7
TOP VIEW
VC 1
FB 2
NFB 3
GND 4
GND 5
GND 6
GND 7
SHDN 8
SYNC 9
VIN 10
20 VSW
19 NC
18 VSW
17 GND
16 GND
15 GND
14 GND
13 NC
12 NC
11 GND
SW PACKAGE
20-LEAD PLASTIC SO WIDE
TJMAX = 125°C, θJA = 50°C/W
θJA WILL VARY FROM APPROXIMATELY 40°C/W WITH
0.75 INCH2 OF 1 OZ COPPER TO 50°C/W WITH 0.33 INCH2
OF 1 OZ COPPER ON A DOUBLE-SIDED BOARD
ORDER PART
NUMBER
LT1371CSW
LT1371HVCSW
LT1371ISW
LT1371HVISW
ELECTRICAL CHARACTERISTICS
VIN = 5V, VC = 0.6V, VFB = VREF, VSW, S/S, SHDN, SYNC and NFB pins open, unless otherwise noted.
SYMBOL PARAMETER
VREF
Reference Voltage
IFB
Feedback Input Current
Reference Voltage Line Regulation
CONDITIONS
Measured at Feedback Pin
VC = 0.8V
VFB = VREF
2.7V ≤ VIN ≤ 25V, VC = 0.8V
MIN
1.230
q 1.225
q
q
TYP
1.245
1.245
250
0.01
MAX
1.260
1.265
550
900
0.03
UNITS
V
V
nA
nA
%/ V
2
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