LTC4253AIGN-ADJ Linear Technology, LTC4253AIGN-ADJ Datasheet - Page 13

• Manufacturer Part Number: LTC4253AIGN-ADJ
• Description: IC,Power Control/Management,CMOS,SSOP,20PIN,PLASTIC
• Manufacturer: Linear Technology

Specifications of LTC4253AIGN-ADJ

• Family Name: LTC4253A-ADJ
• Package Type: SSOP N
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 3.99mm
• Product Height (mm): 1.5mm
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / Rohs Status: Not Compliant

OPERATIO
comparator with a threshold of 200mV detects overshoot
and pulls GATE low much harder and hence much faster
than the weaker current limit loop. The V
limit loop then takes over, and servos the current as
previously described. As before, TIMER runs and shuts
down LTC4253A-ADJ when C
If C
pull-up current source. The LTC4253A-ADJ circuit breaker
latch is reset by either pulling the RESET pin active high for
>20µs, pulling UVL/UV momentarily low, dropping the
input voltage V
pulsing TIMER momentarily low with a switch.
T
reaches 4V, the LTC4253A-ADJ latches off with a 5µA
IN
U
below the internal UVLO threshold or
T
reaches 4V.
ACL
/R
S
current
Although short-circuits are the most obvious fault type,
several operating conditions may invoke overcurrent
protection. Noise spikes from the backplane or load, input
steps caused by the connection of a second, higher
voltage supply, transient currents caused by faults on
adjacent circuit boards sharing the same power bus or the
insertion of non-hot swappable products could cause
higher than anticipated input current and temporary de-
tection of an overcurrent condition. The action of TIMER
and C
to “ride out” temporary overloads and disturbances that
could trip a simple current comparator and, in some
cases, blow a fuse.
T
rejects these events allowing the LTC4253A-ADJ
LTC4253A-ADJ
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