LT1640AL LINER [Linear Technology], LT1640AL Datasheet - Page 25

• Manufacturer Part Number: LT1640AL
• Description: Negative Voltage Hot Swap Controllers
• Manufacturer: LINER [Linear Technology]

APPLICATIONS INFORMATION
PWRGD
SENSE
UV/OV
TIMER
DRAIN
GATE
SS
Figure 12. Undervoltage Timing with an Overvoltage Glitch (All Waveforms Are Referenced to V
V
UV/OV CLEARS V
OVHI
1
V
UVHI
UV/OV OVERSHOOTS V
2
TIMER
SENSE
GATE
UV/OV DROPS BELOW V
OV
SS
3
V
V
Figure 13. Overvoltage Timing (All Waveforms Are Referenced to V
UVHI
GATEL
OVLO
OV OVERSHOOTS V
1
, CHECK OV CONDITION, GATE < V
V
V
OVHI
GATEL
OVHI
V
5.8μA
V
INITIAL TIMING
TMRH
OVLO
AND TIMER ABORTS INITIAL TIMING CYCLE
58μA
OVLO
OV DROPS BELOW V
2 34
OVHI
AND TIMER RESTARTS INITIAL TIMING CYCLE
START-UP
. GATE AND SS ARE PULLED DOWN, PWRGD AND TIMER ARE UNAFFECTED
DRN
GATE
5
58μA
V
ACL
OS
TMRH
CB
67 8 9
OS
V
+ V
+ V
TMRL
GATEL
OS
OS
OVLO
CB
)
)
V
V
V
58μA
IN
ACL
CB
, SENSE < V
4 5 67
+ V
TIMER CLEARS V
, CHECK GATE < V
– V
5.8μA
OS
GATEH
)
ACL
START-UP
GATE
+ V
8
CB
58μA
OS
LTC4252A-1/LTC4252A-2
9
DRN
10
)
TMRL
11
GATEL
12
, CHECK GATE < V
V
V
V
V
V
, SENSE < V
IN
ACL
CB
DRNCL
DRNL
LTC4252-1/LTC4252-2
OS
– V
AND TIMER < V
5.8μA
GATEH
5.8μA
425212 F13
CB
GATEL
TMRL
, SENSE < V
EE
)
OS
5.8μA
CB
425212 F12
EE
)
OS
25
425212fd