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参数资料
| 型号： | LT1507IS8-3.3#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 570 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SO-8 |
| 文件页数： | 12/20页 |
| 文件大小： | 291K |
| 代理商： | LT1507IS8-3.3#TR |
2
LT1507
Input Voltage ........................................................... 16V
Boost Pin Voltage .................................................... 25V
Shutdown Pin Voltage ............................................... 7V
FB Pin Voltage (Adjustable Part) ............................. 3.5V
FB Pin Current (Adjustable Part) ............................. 1mA
Sense Voltage (Fixed 3.3V Part) ................................ 5V
Sync Pin Voltage ....................................................... 7V
Operating Ambient Temperature Range
LT1507C .................................................. 0
°C to 70°C
LT1507I .............................................. – 40
°C to 85°C
Max Operating Junction Temperature ................... 125
°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
TJMAX = 125°C, θJA = 80°C/W TO 120°C/ W (N)
TJMAX = 125°C, θJA = 120°C/W TO 170°C/ W (S)
DEPENDING ON PC BOARD LAYOUT
1
2
3
4
8
7
6
5
TOP VIEW
VC
FB/SENSE
GND
SYNC
BOOST
VIN
VSW
SHDN
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
Consult factory for Military grade parts.
ORDER PART
NUMBER
LT1507CN8
LT1507CN8-3.3
LT1507CS8
LT1507CS8-3.3
LT1507IN8
LT1507IN8-3.3
LT1507IS8
LT1507IS8-3.3
S8 PART MARKING
ELECTRICAL CHARACTERISTICS
TJ = 25°C, VIN = 5V, VC = 1.5V, boost open, switch open unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Voltage (Adjustable)
2.39
2.42
2.45
V
All Conditions
q
2.36
2.48
V
Sense Voltage (3.3V)
3.25
3.3
3.35
V
All Conditions
q
3.23
3.37
V
Sense Pin Resistance
q
4.0
6.6
9.5
k
Reference Voltage Line Regulation
4.3V
≤ VIN ≤ 15V
q
0.01
0.03
%/V
FB Input Bias Current
q
0.5
2
A
Error Amplifier Voltage Gain (Note 8)
(Note 1)
150
400
Error Amplifier Transconductance (Note 8)
I(VC) = ±10A
1500
2000
2700
mho
q
1100
3000
mho
VC Pin to Switch Current
Transconductance
2
A/V
Error Amplifier Source Current
VFB = 2.1V or VSENSE = 2.9V
q
150
225
320
A
Error Amplifier Sink Current
VFB = 2.7V or VSENSE = 3.7V
2
mA
VC Pin Switching Threshold
Duty Cycle = 0
0.9
V
VC Pin High Clamp
VFB = 2.1V or VSENSE = 2.9V
2.1
V
Switch Current Limit
VC Open, VFB = 2.1V or VSENSE = 2.9V
DC
≤ 50% q
1.50
2
3
A
VIN ≥ 5V, VBOOST = VIN + 5V
DC = 80%
q
1.35
3
A
Switch On Resistance (Note 6)
ISW = 1.5A, VBOOST = VIN + 5V
0.3
0.4
q
0.5
Maximum Switch Duty Cycle
VFB = 2.1V or VSENSE = 2.9V
90
93
%
q
86
93
%
1507I
1507I3
1507
15073
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