LT1377IS8 데이터 시트보기 (PDF) - Linear Technology
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LT1377IS8 Datasheet PDF : 12 Pages
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LT1372/LT1377
ABSOLUTE AXI U RATI GS
Supply Voltage ....................................................... 30V
Switch Voltage
LT1372/LT1377 .................................................. 35V
LT1372HV .......................................................... 42V
S/S Pin Voltage ....................................................... 30V
Feedback Pin Voltage (Transient, 10ms) .............. ±10V
Feedback Pin Current ........................................... 10mA
Negative Feedback Pin Voltage
(Transient, 10ms) ............................................. ±10V
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
ORDER PART NUMBER
TOP VIEW
VC 1
FB 2
NFB 3
S/S 4
8 VSW
7 GND
6 GND S
5 VIN
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
LT1372CN8 LT1372HVIN8
LT1372HVCN8 LT1372IS8
LT1372CS8 LT1372HVIS8
LT1372HVCS8 LT1377CS8
LT1372IN8 LT1377IS8
S8 PART MARKING
TJMAX = 125°C, θJA = 100°C/ W (N8)
TJMAX = 125°C, θJA = 120°C/ W (S8)
1372 1372H 1377
1372I 1372HI 1377I
Consult factory for Military grade parts.
*Units shipped prior to Date Code 9552 are rated at 100°C maximum
operating temperature.
ELECTRICAL CHARACTERISTICS
VIN = 5V, VC = 0.6V, VFB = VREF, VSW, S/S and NFB pins open, unless otherwise noted.
SYMBOL PARAMETER
VREF
Reference Voltage
IFB
Feedback Input Current
CONDITIONS
Measured at Feedback Pin
VC = 0.8V
VFB = VREF
Reference Voltage Line Regulation
VNFB
Negative Feedback Reference Voltage
INFB
Negative Feedback Input Current
Negative Feedback Reference Voltage
Line Regulation
gm
Error Amplifier Transconductance
2.7V ≤ VIN ≤ 25V, VC = 0.8V
Measured at Negative Feedback Pin
Feedback Pin Open, VC = 0.8V
VNFB = VNFR
2.7V ≤ VIN ≤ 25V, VC = 0.8V
∆IC = ±25µA
Error Amplifier Source Current
Error Amplifier Sink Current
Error Amplifier Clamp Voltage
AV
Error Amplifier Voltage Gain
VC Pin Threshold
f
Switching Frequency
VFB = VREF – 150mV, VC = 1.5V
VFB = VREF + 150mV, VC = 1.5V
High Clamp, VFB = 1V
Low Clamp, VFB = 1.5V
Duty Cycle = 0%
2.7V ≤ VIN ≤ 25V
LT1372
0°C ≤ TJ ≤ 125°C
– 40°C ≤ TJ < 0°C (I Grade)
LT1377
0°C ≤ TJ ≤ 125°C
– 40°C ≤ TJ < 0°C (I Grade)
MIN
1.230
q 1.225
q
q
– 2.540
q – 2.570
q – 45
q
1100
q 700
q 120
q
1.70
0.25
0.8
450
q 430
400
0.90
q 0.86
0.80
TYP
1.245
1.245
250
0.01
– 2.490
– 2.490
– 30
0.01
1500
200
1400
1.95
0.40
500
1
500
500
1
1
MAX
1.260
1.265
550
900
0.03
– 2.440
– 2.410
– 15
0.05
UNITS
V
V
nA
nA
%/ V
V
V
µA
%/V
1900 µmho
2300 µmho
350
µA
2400
µA
2.30
V
0.52
V
V/ V
1.25
V
550
kHz
580
kHz
580
kHz
1.10
MHz
1.16
MHz
1.16
MHz
2
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