LT1640 Linear Technology, LT1640 Datasheet - Page 6

• Manufacturer Part Number: LT1640
• Description: Negative Voltage Hot Swap Controller
• Manufacturer: Linear Technology

LT1640L/LT1640H
TIMING DIAGRAMS
6
TEST CIRCUIT
GATE
GATE
UV
OV
W U
2V
0V
2V
0V
1.223V
Figure 2. OV to GATE Timing
1.223V
Figure 3. UV to GATE Timing
1V
1V
t
t
PHLUV
PHLOV
W
V
UV
V
5V
+
V
1.203V
OV
1.243V
5k
R
t
t
PLHUV
PLHOV
Figure 1. Test Circuit
1V
1V
PWRGD/PWRGD V
OV
UV
V
EE
LT1640L/LT1460H
1640 F03
1640 F02
SENSE
V
DRAIN
SENSE
GATE
PWRGD
GATE
DD
– V
PWRGD
PWRGD
DRAIN
DRAIN
DRAIN
Figure 5. DRAIN to PWRGD/PWRGD Timing
1640 F01
V
V
1.8V
1.8V
= 0V
DRAIN
SENSE
V
V
0V
EE
EE
+
–
Figure 4. SENSE to GATE Timing
50mV
48V
C
0.033 F
t
PHLSENSE
1V
t
1V
PLHPG
1V
t
PLHPG
1.4V
1.4V
t
PHLPG
1V
t
PHLPG
1V
1640 F05
1640 F04