LTC4251-1IS6#PBF Linear Technology, LTC4251-1IS6#PBF Datasheet - Page 18

• Manufacturer Part Number: LTC4251-1IS6#PBF
• Manufacturer: Linear Technology

Specifications of LTC4251-1IS6#PBF

• Family Name: LTC4251-1
• Package Type: TSOT-23
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Height (mm): 0.9mm
• Product Length (mm): 2.9mm
• Mounting: Surface Mount
• Pin Count: 6
• Lead Free Status / RoHS Status: Compliant

SENSE
LTC4251/LTC4251-1/
LTC4251-2
APPLICATIO S I FOR ATIO
The ramp duration is approximately 200µs. This feature
reduces load current dl/dt at start-up. As illustrated in
Figure 15, soft-start is initiated by a TIMER transition from
TIMER
18
GATE
V
OUT
(12a) Momentary Circuit-Breaker Fault
230µA
1
CB FAULT
SENSE
TIMER
GATE
V
OUT
2
V
TMRL
(13a) Analog Current Limit Fault
V
V
230µA
ACL
CB
1
2
U
3
4
5.8µA
V
TMRH
58µA
SENSE
TIMER
V
V
UV/0V
GATE
ACL
CB
U
Figure 13. Current Limit Behavior (All Waveforms are Referenced to V
V
TMRH
Figure 11. Overvoltage Timing (All Waveforms are Referenced to V
V
5.8µA
OVHI
Figure 12. Timer Behavior (All Waveforms are Referenced to V
5.8µA
5.8µA
1
425112 F12a
V
W
UV/0V
OVERSHOOTS V
TIMER
SENSE
GATE
V
OUT
5.8µA
5.8µA
V
425112 F13a
OVLO
(12b) Circuit-Breaker Time-Out
58µA
2
1
230µA
U
OVHI
CB FAULT
V
3
UV/0V
AND GATE PULLS TO V
230µA
4
V
TMRH
DROPS BELOW V
5 6
2
V
V
58µA
TIMER LATCHES OFF
ACL
CB
7
V
V
ACL
CB
OVLO
V
threshold after an OV fault. After soft-start duration, load
current is limited by V
EE
TMRH
. TIMER UNAFFECTED.
AND GATE RESTARTS.
5.8µA
5.8µA
to V
SENSE
TIMER
GATE
V
OUT
425112 F12b
TMRL
(13b) Fast Current Limit Fault
5.8µA
1
230µA
V
or when UV/OV falls below the V
TIMER
SENSE
FCL
GATE
V
V
OUT
TMRH
(12c) Multiple Circuit-Breaker Faults
ACL
2
EE
V
V
230µA
/R
1
TIMER LATCHES OFF
ACL
)
CB
EE
EE
)
S
.
)
425112 F11
2
5.8µA
5.8µA
3
230µA
425112 F13b
4
V
V
TIMER LATCHES OFF
V
ACL
CB
TMRH
5.8µA
425112fa
OVLO
425112 F12c