LTC1421CSW-2.5#TR Linear Technology, LTC1421CSW-2.5#TR Datasheet - Page 17
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LTC1421CSW-2.5#TR
Manufacturer Part Number
LTC1421CSW-2.5#TR
Description
IC CONTROLLER HOTSWP 2.5V 24SOIC
Manufacturer
Linear Technology
Type
Hot-Swap Controllerr
Datasheet
1.LTC1421CG-2.5PBF.pdf
(24 pages)
Specifications of LTC1421CSW-2.5#TR
Applications
General Purpose
Internal Switch(s)
No
Voltage - Supply
3 V ~ 12 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
24-SOIC (0.300", 7.50mm Width)
Linear Misc Type
Positive Low Voltage
Family Name
LTC1421
Package Type
SOIC W
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
12V
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
24
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
APPLICATIONS
5V Only Applications
The LTC1421 may be used in 5V only applications as shown
in Figure 18. A soft reset can be generated from the
backplane via an open-collector inverter driving the FB (Pin
11) or by a push button to ground. A hard power reset is
generated from the backplane via an open-collector inverter
driving the POR (Pin 3). A hard reset cycles the power on
the board or resets the electronic circuit breaker. The
comparator is used to monitor the board supply voltage and
– 48V
– 48V
– 48V
BACKPLANE
POWERGOOD
HARD RESET
SOFT RESET
FAULT
U
PC BOARD
5V
5V
INFORMATION
1/6
LS7004
10k
10k
U
5V
5.1V
BACKPLANE
D1
– 48V
S1
R1
5.1k
1W
+
W
C1
1 F
C2
2.2 F
25V
PC BOARD
24
Figure 18. 5V Only Application with Soft Reset
2
4
3
1
Figure 19. – 48V to 5V Hot Swappable Supply
23
22
12
U
21
LTC1421
C1
1 F
15
5
20
1
19
3
12
23
1
18
0.005
1W
R1
2.2 F
17
25V
C3
16
2
will pull the POWERGOOD signal low as long as the supply
remains above 4.65V. Note that a soft reset will not affect
the POWERGOOD signal. The FAULT signal is also moni-
tored to determine that the circuit breaker has tripped.
– 48V and 24V Applications
The LTC1421 may be used in – 48V applications as shown
in Figure 19. The LTC1421 provides the hot insertion
protection, while the 5V supply is generated by a power
+
10
9
13
14
8
11
15
6
7
5
4
22
MTB50N06E
LTC1421
300
1/8W
Q1
R4
21
9
R2
15k
1/8W
IRFR9110
1 F
20
6
Q1
19
3
Q2
MPSA06
R3
56k
1/2W
18
17
LTC1421/LTC1421-2.5
R5
10k
1/2W
R6
402
1/8W
16
10k
R4
10
7
14
13
8
11
+
C4
100 F
100V
C2
1 F
1 F
S1
1
2
1421 F19
+IN
–IN
1421 F18
ASD 10-48S5
R2
28k
1%
R3
10.2k
1%
ASTRODYNE
CONTROL
C
– OUT
6
LOAD
+OUT
LOGIC
RESET
3
5
+
5V
C4
100 F
16V
5V
2A
17