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LT3758 датащи(PDF) 3 Page - Linear Technology

номер детали LT3758
подробное описание детали  High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller
PDF  36 Pages
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производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT3758 датащи(HTML) 3 Page - Linear Technology

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LT3758
3
3758f
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at TA = 25°C. VIN = 24V, SHDN/UVLO = 24V, SENSE = 0V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN Operating Range
5.5
100
V
VIN Shutdown IQ
SHDN/UVLO = 0V
SHDN/UVLO = 1.15V
0.1
1
6
μA
μA
VIN Operating IQ
VC = 0.3V, RT = 41.2k
1.6
2.2
mA
VIN Operating IQ with Internal LDO Disabled
VC = 0.3V, RT = 41.2k, INTVCC = 7.5V
350
400
μA
SENSE Current Limit Threshold
l
100
110
120
mV
SENSE Input Bias Current
Current Out of Pin
–65
μA
Error Amplifier
FBX Regulation Voltage (VFBX(REG))
FBX > 0V (Note 3)
FBX < 0V (Note 3)
l
l
1.569
–0.816
1.6
–0.800
1.631
–0.784
V
V
FBX Overvoltage Lockout
FBX > 0V (Note 4)
FBX < 0V (Note 4)
6
7
8
11
10
14
%
%
FBX Pin Input Current
FBX = 1.6V (Note 3)
FBX = –0.8V (Note 3)
–10
70
100
10
nA
nA
Transconductance gm (ΔIVC/ΔFBX)
(Note 3)
230
μS
VC Output Impedance
(Note 3)
5
MΩ
VFBX Line Regulation (ΔVFBX/[ΔVIN • VFBX(REG)])
FBX > 0V, 5.5V < VIN < 100V (Notes 3, 6)
FBX < 0V, 5.5V < VIN < 100V (Notes 3, 6)
0.006
0.005
0.025
0.03
%/V
%/V
VC Current Mode Gain (ΔVVC /ΔVSENSE)
5.5
V/V
VC Source Current
VC = 1.5V
–15
μA
VC Sink Current
FBX = 1.7V
FBX = –0.85V
12
11
μA
μA
Oscillator
Switching Frequency
RT = 41.2k to GND, FBX = 1.6V
RT = 140k to GND, FBX = 1.6V
RT = 10.5k to GND, FBX = 1.6V
270
300
100
1000
330
kHz
kHz
kHz
RT Voltage
FBX = 1.6V
1.2
V
Minimum Off-Time
220
ns
Minimum On-Time
220
ns
SYNC Input Low
0.4
SYNC Input High
1.5
SS Pull-Up Current
SS = 0V, Current Out of Pin
–10
μA
Low Dropout Regulator
INTVCC Regulation Voltage
l
7
7.2
7.4
V
INTVCC Undervoltage Lockout Threshold
Falling INTVCC
UVLO Hysteresis
4.3
4.5
0.5
4.7
V
V
INTVCC Overvoltage Lockout Threshold
17.5
V
INTVCC Current Limit
VIN = 100V
VIN = 20V
11
16
50
22
mA
mA
INTVCC Load Regulation (ΔVINTVCC /VINTVCC)
0 < IINTVCC < 10mA, VIN = 8V
–1
–0.4
%
INTVCC Line Regulation (ΔVINTVCC /[ΔVIN • VINTVCC])
8V < VIN < 100V
0.005
0.02
%/V
Dropout Voltage (VIN – VINTVCC)VIN = 6V, IINTVCC = 10mA
500
mV



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