LTC4253 LINER [Linear Technology], LTC4253 Datasheet - Page 30

• Manufacturer Part Number: LTC4253
• Manufacturer: LINER [Linear Technology]

LTC4253/LTC4253A
APPLICATIONS INFORMATION
30
PWRGD1
SENSE
TIMER
DRAIN
GATE
SS
PWRGD1
SENSE
TIMER
DRAIN
GATE
V
V
END OF INITIAL TIMING CYCLE
12 3 4 5 6 7
OUT
GS(th)
SS
V
ACL
(15a) Without External C
V
TMRH
TMRH
V
(14a) Analog Current Limit Fault
+ V
TMRL
50μA
1 2
OS
DRN
)
OS
34
Figure 14. Current Limit Behavior (All Waveforms Are Referenced to V
7a
Figure 15. Soft-Start Timing (All Waveforms Are Referenced to V
CB
V
V
ACL
CB
+ V
50μA
OS
DRN
)
8 9
SS
5μA
50μA
V
V
V
ACL
CB
DRNCL
10
V
5μA
DRNL
11
V
IN
– V
GATEH
PWRGD1
PWRGD1
SENSE
TIMER
DRAIN
SENSE
TIMER
DRAIN
GATE
GATE
V
SS
OUT
V
V
DRNCL
TMRH
END OF INITIAL TIMING CYCLE
12 3 4 5 6
V
GS(th)
(14b) Fast Current Limit Fault
DRN
V
1
TMRH
V
TMRL
V
(15b) With External C
FCL
50μA
CB TIMES-OUT
2
OS
V
ACL
V
CB
ACL
7
EE
+ V
)
50μA
EE
DRN
OS
)
)
8 9
SS
CB
V
V
V
50μA
+ V
10
ACL
CB
DRNCL
V
5μA
OS
DRNL
)
4253 F14
11
V
IN
– V
4253 F15
GATEH
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