LTC1645IS8#TR Linear Technology, LTC1645IS8#TR Datasheet - Page 11

• Manufacturer Part Number: LTC1645IS8#TR
• Description: IC CTRLR SEQ HOTSWAP DUAL 8SOIC
• Manufacturer: Linear Technology
• Type: Hot-Swap Controllerr

Specifications of LTC1645IS8#TR

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: 1.2 V ~ 12 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Linear Misc Type: Positive Low Voltage
• Family Name: LTC1645
• Package Type: SOIC N
• Operating Supply Voltage (min): 1.2V
• Operating Supply Voltage (max): 12V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 3.99mm
• Product Height (mm): 1.5mm
• Product Length (mm): 5mm
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATIO S I FOR ATIO
Supply Glitching
LTC1645 Hot Swap circuits on the backplane are generally
used to provide power-up/down sequence at insertion/
removal as well as overload/short-circuit protection. If a
short-circuit occurs at supply ramp-up, the circuit breaker
(a) V
CC
Short-Circuit Supply Current Glitch Without Any Limiting
(c) V
with 2 H Series Inductor
CC
Short-Circuit Supply Current Glitch
U
U
1 s/DIV
1 s/DIV
12V
W
+
–
1645 F08a
1645 F08c
SUPPLY
GLITCH
+
100 F
U
Figure 8. Supply Glitch
0.01
LTC1645
R1
IRF7413
trips. The partially enhanced FET is easily disconnected
without any supply glitch.
If a dead short occurs after a supply connection is made
(Figure 8), the sense resistor R1 and the R
fully enhanced FET provide a low impedance path for
10
2 H
0.1 F
(d) V
1645 F08
GATE
(b) V
GATE
V
V
CC
CC
CC
CC
Supply Glitch with 2 H Series Inductor
Supply Glitch Without Any Limiting
1 s/DIV
1 s/DIV
1645 F08b
1645 F08d
LTC1645
DS(ON)
11
of the
1645fa