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LT4250HCS8 Datasheet(PDF) 6 Page - Linear Technology

Part # LT4250HCS8
Description  Negative 48V Hot Swap Controller
Download  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT4250HCS8 Datasheet(HTML) 6 Page - Linear Technology

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6
LT4250L/LT4250H
4250lhf
PWRGD/PWRGD
VDD
V +
5V
OV
VDRAIN
48V
R
5k
DRAIN
LT4250L/LT4250H
UV
GATE
VEE
SENSE
VSENSE
1640 F01a
VUV
VOV
+
Figure 1a. Test Circuit 1
2V
1V
4250 F02
tPHLOV
1.255V
0V
OV
GATE
1V
1.235V
tPLHOV
TIMING DIAGRAMS
Figure 2. OV to GATE Timing
2V
1V
4250 F03
tPHLUV
1.125V
0V
UV
GATE
1V
1.255V
tPLHUV
Figure 3. UV to GATE Timing
Figure 4a. SENSE to GATE Timing
1V
4250 F04a
tPHLSENSE
60mV
SENSE
GATE
100mV
VEE
Figure 5a. DRAIN to PWRGD/PWRGD Timing
Figure 4b. Active Current Limit Timeout
1V
4250 F04b
tPHLCB
UV
GATE
1V
PWRGD/PWRGD VDD
OV
48V
20V
DRAIN
LT4250L/LT4250H
UV
GATE
VEE
SENSE
4250 F01b
VUV
0.1
µF
+
+
10k
10
10
IRF530
Figure 1b. Test Circuit 2
Figure 5b. GATE to PWRGD/PWRGD Timing
4250 F05b
VPWRGD – VDRAIN = 0
GATE
PWRGD
1V
1.4V
1.4V
VEE
GATE
PWRGD
1V
tPHLGH
tPHLGH
∆VGATE – VGATE = 0
∆VGATE – VGATE = 0
4250 F05a
VPWRGD – VDRAIN = 0V
DRAIN
PWRGD
1V
1.4V
VEE
DRAIN
PWRGD
1V
1.4V
tPHLDL
tPHLDL
VEE
VEE


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