43631 データシートの表示（PDF） - Linear Technology
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43631 Datasheet PDF : 24 Pages
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LT4363
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 12V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
IFB
ΔVSNS
ISNS
FB Input Current
Current Limit Sense Voltage
ΔVSNS = (SNS – OUT)
Current Limit Foldback
SNS Input Current
VFB = 1.275V
VCC = 12V, OUT = 3V to 12V
VCC = 48V, OUT = 3V to 48V
VCC = 12V, OUT = 0V to 1V
VCC = 48V, OUT = 0V to 1V
OUT = SNS = 3V to 80V
OUT = SNS = 0V
l
±0.2 ±1
µA
l 45
50
55
mV
l 48
53
58
mV
l 15
25
35
mV
l 16
27
36
mV
l
20
40
µA
l
–10 –15
µA
ITMR
VTMR(F)
VTMR(G)
VTMR(R)
ΔVTMR
VTMR(H)
VUV
VUV(HYST)
VOV
VOV(HYST)
IIN
TMR Pull-up Current, Overvoltage
TMR Pull-up Current, OV Warning
TMR Pull-up Current, Overcurrent
TMR Pull-up Current, Cool Down
TMR Pin Pull-down Current, Cool Down
TMR Fault Threshold
TMR Gate Off Threshold
TMR Restart Threshold
Early Warning Window
TMR Cool Down High Threshold
UV Input Threshold
UV Input Hysteresis
OV Input Threshold
OV Input Hysteresis
UV, OV Input Current
TMR = 1V, FB = 1.5V, ΔVDS = 0.5V
TMR = 1V, FB = 1.5V, ΔVDS = 75V
TMR = 1.325V, FB = 1.5V, ΔVDS = 0.5V
TMR = 1V, ΔVSNS = 100mV, ΔVDS = 0.5V
TMR = 1V, ΔVSNS = 100mV, ΔVDS = 80V
TMR = 3V, FB = 1.5V, ΔVSNS = 0V, ΔVDS = 0V
VTMR = 3V, FB = 1.5V, ΔVSNS = 0V, ΔVDS = 0V
TMR Rising
TMR Rising
TMR Falling, LT4363-2
VTMR(G) – VTMR(F)
VCC = 7V to 80V, TMR Rising
UV Rising
OV Rising
UV = 1.275V
UV = –60V
l –1.7 –4
–6
µA
l –42 –50 –58
µA
l –3
–5
–7
µA
l –5
–9
–13
µA
l –190 –250 –310
µA
l –1 –2.3 –3.5
µA
l1
2
4
µA
l 1.235 1.275 1.31
V
l 1.335 1.375 1.41
V
l 0.47 0.5 0.53
V
l 80 100 120
mV
l 3.5 4.3 5.4
V
l 1.24 1.275 1.31
V
12
mV
l 1.24 1.275 1.31
V
7.5
mV
l
±0.2 ±1
µA
l
–1
–2
mA
ILEAK
FLT, ENOUT Leakage Current
VOL
FLT, ENOUT Output Low
ΔVOUT(TH) OUT High Threshold
ΔVOUT(RST) OUT Reset Threshold
IOUT
OUT Input Current
VSHDN
SHDN Threshold
FLT, ENOUT = 80V
ISINK = 0.1mA
ISINK = 2mA
ΔVOUT = VCC – VOUT, ENOUT From Low to High
ENOUT From High to Low
VCC = OUT = 12V, SHDN Open
VCC = OUT = 12V, SHDN = 0V
VCC = 4V to 80V
l
±0.5 ±2.5
µA
l
300 800
mV
l
2
9
V
l 0.25 0.5 0.75
V
l 1.8 2.7 3.6
V
l
0.25 0.5
mA
l
0.25 1
mA
0.6 1.4 1.7
V
l 0.4
2.1
V
VSHDN(Z)
ISHDN
tRESET
D
tOFF(UV)
tOFF(OV)
tOFF(OC)
SHDN Open Voltage
SHDN Current
VCC = 4V to 80V
SHDN = 0.4V
SHDN Reset Time
SHDN ≤ 0.4V; LT4363-1
Retry Duty Cycle; Overvoltage
VCC = 80V, OUT = 16V, FB = 1.5V; LT4363-2
Retry Duty Cycle; Output Short
VCC = 12V, OUT = 0V, ∆VSNS = 100mV; LT4363-2
Undervoltage Turn Off Propagation Delay UV Steps from 1.5V to 1V
Overvoltage Turn Off Propagation Delay FB Steps from 0V to 1.5V; OUT = 0V
Overcurrent Turn Off Propagation Delay ∆VSNS Steps from 0V to 150mV; OUT = 0V
l
2.2
V
l –1
–4
–8
µA
l
100
µs
l
1
2
%
l
0.76 1
%
l
2
5
µs
l
0.25 1
µs
l
1
2.5
µs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into device pins are positive, all currents out of device pins
are negative. All voltages are referenced to GND unless otherwise specified.
Note 3: An internal clamp limits the GATE pin to a minimum of 10V above
the OUT pin. Driving this pin to voltages beyond the clamp may damage
the device.
4363fb
4
For more information www.linear.com/LT4363
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