LT1370/HV 查看數據表（PDF） - Linear Technology
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LT1370/HV Datasheet PDF : 16 Pages
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LT1072
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating
temperature range. Unless otherwise specified, VIN = 15V, VC = 0.5V, VFB = VREF, output pin open.
SYMBOL PARAMETER
VREF
Reference Voltage
IB
Feedback Input Current
gm
Error Amplifier
Transconductance
Error Amplifier Source or
Sink Current
Error Amplifier Clamp
Voltage
Reference Voltage Line
Regulation
AV
Error Amplifier Voltage Gain
Minimum Input Voltage
IQ
Supply Current
Control Pin Threshold
Normal/Flyback Threshold on Feedback Pin
VFB
Flyback Reference Voltage
Change in Flyback Reference Voltage
Flyback Reference Voltage
Line Regulation
Flyback Amplifier Transconductance (gm)
Flyback Amplifier Source
and Sink Current
BV
Output Switch Breakdown
Voltage
VSAT
Output Switch ON Resistance (Note 2)
Control Voltage to Switch Current Transconductance
ILIM
Switch Current Limit
∆IIN
Supply Current Increase
∆ISW
During Switch ON Time
f
Switching Frequency
DC (max)
Maximum Switch Duty Cycle
Flyback Sense Delay Time
Shutdown Mode
Supply Current
Shutdown Mode
Threshold Voltage
CONDITlONS
Measured at Feedback Pin
VC = 0.8V
VFB = VREF
∆IC = ±25µA
VC = 1.5V
Hi Clamp, VFB = 1V
Lo Clamp, VFB = 1.5V
3V ≤ VIN ≤ VMAX
VC = 0.8V
0.9V ≤ VC ≤ 1.4V
3V ≤ VIN ≤ VMAX, VC = 0.6V
Duty Cycle = 0
lFB = 50µA
0.05 ≤ IFB ≤ 1mA
lFB = 50µA
3V ≤ VIN ≤ VMAX (Note 4)
∆IC = ±10µA
VC = 0.6V Source
IFB = 50µA Sink
3V ≤ VIN ≤ VMAX
ISW = 1.5mA
ISW = 1.25A
LT1072
LT1072HV
LT1072S8
Duty Cycle = 50%
TJ ≥ 25°C
Duty Cycle = 50%
TJ < 25°C
Duty Cycle = 80% (Note 3)
MIN TYP MAX
1.224 1.244 1.264
● 1.214 1.244 1.274
350 750
●
1100
3000 4400 6000
● 2400
7000
150 200 350
● 120
400
1.8
2.3
0.25 0.38 0.52
●
0.03
500 800
●
2.6 3.0
6
9
0.8 0.9 1.08
● 0.6
1.25
0.4 0.45 0.54
15 16.3 17.6
● 14
18
4.5 6.8 8.5
0.01 0.03
150 300 650
● 15 32 70
● 25 40 70
● 65 90
● 75 90
● 60 80
●
0.6 1
2
● 1.25
3
● 1.25
3.5
●
1
2.5
25 35
3V ≤ VIN ≤ VMAX
VC = 0.05V
3V ≤ VIN ≤ VMAX
35 40 45
● 33
47
90 92 97
1.5
100 250
100 150 250
● 50
300
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Measured with VC in hi clamp, VFB = 0.8V.
Note 3: For duty cycles (DC) between 50% and 80%, minimum
guaranteed switch current is given by ILIM = 0.833 (2 – DC).
Note 4: VMAX = 55V for LT1072HV to avoid switch breakdown.
UNITS
V
V
nA
nA
µmho
µmho
µA
µA
V
V
%/V
%/V
V/V
V
mA
V
V
V
V
V
V
%/V
%/V
µmho
µA
µA
V
V
V
Ω
A/V
A
A
A
mA/A
kHz
kHz
%
µs
µA
mV
mV
1072fc
3
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