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參數(shù)資料
| 型號(hào)： | LT1171ITTR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5.5 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PZFM5 |
| 封裝： | PLASTIC, TO-220, 5 PIN |
| 文件頁數(shù)： | 14/20頁 |
| 文件大?。?/td> | 278K |
| 代理商： | LT1171ITTR |
3
LT1170/LT1171/LT1172
117012ff
TJMAX
θJC
θJA
LT1170MK
150
°C2°C/W
35
°C/W
LT1170CK
100
°C2°C/W
35
°C/W
LT1171MK
150
°C4°C/W
35
°C/W
LT1171CK
100
°C4°C/W
35
°C/W
LT1172MK
150
°C8°C/W
35
°C/W
LT1172CK
150
°C8°C/W
35
°C/W
Based on continuous operation.
TJMAX = 125°C for intermittent fault conditions.
LT1170MK
LT1170CK
LT1171MK
LT1171CK
LT1172MK
LT1172CK
ORDER PART
NUMBER
2
4
1
3
VSW
VC
FB
CASE
IS GND
VIN
K PACKAGE
4-LEAD TO-3 METAL CAN
BOTTOM VIEW
PACKAGE/ORDER I FOR ATIO
UU
W
ORDER PART
NUMBER
LT1172MJ8
LT1172CJ8
TJMAX = 150°C, θJA = 100°C/W
* Do not connect Pin 4 of the LT1172 DIP or SO to external
circuitry. This pin may be active in future revisions.
1
2
3
4
8
7
6
5
TOP VIEW
GND
VC
FB
NC*
E2
VSW
E1
VIN
J8 PACKAGE
8-LEAD CERDIP
OBSOLETE PACKAGES
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VREF
Reference Voltage
Measured at Feedback Pin
1.224
1.244
1.264
V
VC = 0.8V
q
1.214
1.244
1.274
V
IB
Feedback Input Current
VFB = VREF
350
750
nA
q
1100
nA
gm
Error Amplifier
IC = ±25A
3000
4400
6000
mho
Transconductance
q
2400
7000
mho
Error Amplifier Source or
VC = 1.5V
150
200
350
A
Sink Current
q
120
400
A
Error Amplifier Clamp
Hi Clamp, VFB = 1V
1.80
2.30
V
Voltage
Lo Clamp, VFB = 1.5V
0.25
0.38
0.52
V
Reference Voltage Line
3V
≤ VIN ≤ VMAX
q
0.03
%/V
Regulation
VC = 0.8V
AV
Error Amplifier Voltage Gain
0.9V
≤ VC ≤ 1.4V
500
800
V/V
Minimum Input Voltage (Note 5)
q
2.6
3.0
V
IQ
Supply Current
3V
≤ VIN ≤ VMAX, VC = 0.6V
6
9
mA
Control Pin Threshold
Duty Cycle = 0
0.8
0.9
1.08
V
q
0.6
1.25
V
Normal/Flyback Threshold
0.4
0.45
0.54
V
on Feedback Pin
VFB
Flyback Reference Voltage
IFB = 50A
15.0
16.3
17.6
V
(Note 5)
q
14.0
18.0
V
Change in Flyback Reference
0.05
≤ IFB ≤ 1mA
4.5
6.8
9
V
Voltage
Flyback Reference Voltage
IFB = 50A
0.01
0.03
%/V
Line Regulation (Note 5)
7V
≤ VIN ≤ VMAX
Flyback Amplifier
IC = ±10A
150
300
650
mho
Transconductance (gm)
The q denotes the specifications which apply over the full operating tem-
perature range, otherwise specifications are at TA = 25°C. VIN = 15V, VC = 0.5V, VFB = VREF, output pin open, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
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