LT4250H LINER [Linear Technology], LT4250H Datasheet - Page 12

• Manufacturer Part Number: LT4250H
• Description: Negative 48V Hot Swap Controller
• Manufacturer: LINER [Linear Technology]

–48V RTN
LT4250L/LT4250H
TYPICAL
Using an EMI Filter Module
Many applications place an EMI filter module in the power
path to prevent switching noise of the module from being
injected back onto the power supply. A typical application
RELATED PARTS
PART NUMBER
LTC
LTC1422
LT1640AH/LT1640AL
LT1641-1/LT1641-2
LTC1642
LTC1643
LTC1645
LTC1646
LTC1647
LTC4211
LTC4251
LTC4252
12
* DIODES INC. SMAT70A
– 48V
®
(SHORT PIN)
1421
–48V RTN
*
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
6.49k
549k
10k
1%
1%
1%
R4
R5
R6
APPLICATION
3
2
UV
OV
3
V
EE
4
DESCRIPTION
Dual Hot Swap Controller with Additional –12V Control
–48V Hot Swap Controller in SO-8
+48V Hot Swap Controller in SO-8
Fault Protected Hot Swap Controller
PCI Hot Swap Controller
Dual Hot Swap Controller
Dual CompactPCI Hot Swap Controller
Dual Hot Swap Controller
Hot Swap Controller with Multifunction Current Control
–48 Hot Swap Controller in SOT-23
–48 Hot Swap Controller in MSOP
1
Hot Swap Controller in SO-8
LT4250L
0.02
5%
V
R1
DD
8
PWRGD
DRAIN
SENSE
2
GATE
4
5
1
7
6
U
100V
15nF
C1
470nF
25V
C2
Figure 15. Typical Application Using a Filter Module
IRF530
Q1
R3
1k
5%
R2
10
5%
1N4003
C3
0.1 F
100V
V
V
FLTR100V10
IN
IN
LUCENT
MOC207
+
–
R7
51k
5%
CASE
using the Lucent FLTR100V10 filter module is shown in
Figure 15. When using a filter, an optoisolator is required
to prevent common mode transients from destroying the
PWRGD and ON/OFF pins.
V
V
OUT
OUT
+
–
COMMENTS
LT4250 is a Pin-Compatible Upgrade to LT1640
3.3V, 5V, 12V, – 12V Supplies for PCI Bus
Operates from 1.2V to 12V, Power Sequencing
Dual ON Pins for Supplies from 3V to 15V
Active Current Limiting, Fast Comparator
for Catastrophic Faults
Active Current Limiting, Fast Comparator for Catastrophic
Faults, Separate UV/0V Pins, Power-Good Output
C4
0.1 F
100V
Operates from 3V to 12V
System Reset Output with Programmable Delay
Foldback Current Limit, 9V to 80V, Auto-Retry/Latch-Off
Operates Up to 16.5V, Protected to 33V
3.3V, 5V Supplies with Precharge and Local PCI Reset Logic
2.5V to 16.5V Supplies, Active Inrush Current Limiting
+
C5
100 F
100V
C6
0.1 F
100V
LINEAR TECHNOLOGY CORPORATION 2001
1
2
4
V
ON/OFF
V
IN
IN
LT/TP 0402 2K • PRINTED IN USA
JW050A1-E
+
–
LUCENT
CASE
SENSE
SENSE
3
V
V
TRIM
OUT
OUT
+
+
–
–
4250 F15
9
8
7
6
5
+
4250lhf
C7
100 F
16V
5V