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3724MPFE Datenblatt(PDF) 3 Page - Linear Technology

Teilenummer 3724MPFE
Bauteilbeschribung  High Voltage, Current Mode Switching Regulator Controller
PDF  24 Pages
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Hersteller  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

3724MPFE Datenblatt(HTML) 3 Page - Linear Technology

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LT3724
3
3724fc
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 20V, VCC = BOOST = BURST_EN = 10V, SHDN = 2V,
SENSE– = SENSE+ = 10V, SGND = PGND = SW = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VBOOST
Operating Voltage Range
Operating Voltage Range (Note 5)
UVLO Threshold (Rising)
UVLO Threshold Hysteresis
VBOOST - VSW
VBOOST - VSW
VBOOST - VSW
●
●
5
400
75
20
V
V
V
mV
IBOOST
BOOST Supply Current (Note 6)
BOOST Burst Mode Current
BOOST Shutdown Current
VBURST_EN = 0V
VSHDN = 0V
1.4
0.1
0.1
mA
μA
μA
VCC
Operating Voltage Range (Note 5)
Output Voltage
UVLO Threshold (Rising)
UVLO Threshold Hysteresis
Over Full Line and Load Range
●
●
8
6.25
500
20
8.3
V
V
V
mV
IVCC
VCC Supply Current (Note 6)
VCC Burst Mode Current
VCC Shutdown Current
Short-Circuit Current
VBURST_EN = 0V
VSHDN = 0V
●
●
–30
1.7
80
20
–55
2.1
mA
μA
μA
mA
VFB
Error Amp Reference Voltage
Measured at VFB Pin
●
1.224
1.215
1.231
1.238
1.245
V
V
IFB
Feedback Input Current
25
nA
VSHDN
Enable Threshold (Rising)
Threshold Hysteresis
●
1.3
1.35
120
1.4
V
mV
VSENSE
Common Mode Range
Current Limit Sense Voltage
VSENSE+ – VSENSE–
●
●
0
140
150
36
175
V
mV
ISENSE
Input Current
(ISENSE+ + ISENSE–)
VSENSE(CM) = 0V
VSENSE(CM) = 2.5V
VSENSE(CM) > 4V
400
2
–150
μA
μA
μA
fSW
Operating Frequency
MP Grade
●
●
190
175
165
200
200
210
220
225
kHz
kHz
kHz
VFB(SS)
Soft-Start Disable Voltage
Soft-Start Disable Hysteresis
VFB Rising
1.185
300
V
mV
ISS
Soft-Start Capacitor Control Current
2
μA
gm
Error Amp Transconductance
●
275
340
400
μmhos
AV
Error Amp DC Voltage Gain
62
dB
VC
Error Amp Output Range
Zero Current to Current Limit
1.2
V
IVC
Error Amp Sink/Source Current
±30
μA
VTG
Gate Drive Output On Voltage (Note 7)
Gate Drive Output Off Voltage
CLOAD = 3300pF
CLOAD = 3300pF
9.8
0.1
V
V
tTG
Gate Drive Rise/Fall Time
10% to 90% or 90% to 10%, CLOAD = 3300pF
60
ns
tTG(OFF)
Minimum Switch Off Time
350
ns
tTG(ON)
Minimum Switch On Time
●
300
500
ns
ISW
SW Pin Sink Current
VSW = 2V
300
mA



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