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LTC4244IGN-1#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P28
25
LTC4244/LTC4244-1
42441f
The IRF7457’s Thermal Response vs Pulse Duration curve
indicates that the worst-case increase in junction-to-
ambient temperature during a power-cycle for the 3.3V
MOSFET is less than 96°C while the worst-case increase
in junction-to-ambient temperature for the 5V MOSFET is
less than 88°C.
Power MOSFET and Sense Resistor Selection
Tables 7 and 8 list current sense resistors and power
MOSFET transistors, respectively, that can be used with
the LTC4244’s circuit breakers. Table 9 lists supplier web
site addresses for discrete components mentioned
throughout the LTC4244 data sheet.
Obtaining Information on Specific Parts
For more information or to request a copy of the
CompactPCI specification, contact the PCI Industrial Com-
puter Manufacturers Group at:
PCI Industrial Computer Manufacturers Group
Wakefield, MA 01880 USA
Phone: 01 (718) 224-1239
Web Site: http://www.picmg.com
Transient Voltage Suppressors SMAJ12A and SMAJ5.0A
are supplied by:
Diodes, Incorporated
Westlake Village, CA 91362 USA
Phone: 01 (805) 446-4800
Web Site: http://www.vishay.com or
http://www.diodes.com
Transistors MMBT2222A and MMBT3906 are supplied
by:
ON Semiconductor
Phoenix, AZ 85008 USA
Phone: 01 (602) 244-6600
Web Site: http://www.onsemi.com
APPLICATIO S I FOR ATIO
WUUU
26
LTC4244/LTC4244-1
42441f
APPLICATIO S I FOR ATIO
WUUU
Table 7. Sense Resistor Selection Guide
CURRENT LIMIT VALUE PART NUMBER DESCRIPTION MANUFACTURER
1A LR120601R055F 0.055Ω, 0.5W, 1% Resistor IRC-TT
WSL1206R055 Vishay Dale
2A LR120601R028F 0.028Ω, 0.5W, 1% Resistor IRC-TT
WSL1206R028 Vishay Dale
5A LR120601R011F 0.011Ω, 0.5W, 1% Resistor IRC-TT
WSL2010R011 Vishay Dale
7.6A WSL2512R007 0.007Ω, 1W, 1% Resistor Vishay Dale
10A WSL2512R005 0.005Ω, 1W, 1% Resistor Vishay Dale
Table 8. N-Channel Power MOSFET Selection Guide
CURRENT LIMIT VALUE PART NUMBER DESCRIPTION MANUFACTURER
0A to 2A MMDF3N02HD Dual N-Channel SO-8, R
DS(ON)
= 0.1Ω ON Semiconductor
2A to 5A MMSF5N02HD Single N-Channel SO-8, R
DS(ON)
= 0.025Ω ON Semiconductor
5A to 10A MTB50N06V Single N-Channel DD-Pak, R
DS(ON)
= 0.028Ω ON Semiconductor
5A to 10A IRF7457 Single N-Channel SO-8, R
DS(ON)
= 0.007Ω International Rectifier
5A to 10A Si7880DP Single N-Channel PowerPAK
TM
, R
DS(ON)
= 0.003 Ω Vishay Siliconix
PowerPAK is a trademark of Vishay Siliconix
Table 9. Manufacturers’ Web Site
MANUFACTURER WEB SITE
International Rectifier www.irf.com
ON Semiconductor www.onsemi.com
IRC-TT www.irctt.com
Vishay Dale www.vishay.com
Vishay Siliconix www.vishay.com
Diodes, Inc. www.diodes.com
27
LTC4244/LTC4244-1
42441f
U
PACKAGE DESCRIPTIO
GN Package
20-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.337 – .344*
(8.560 – 8.738)
GN20 (SSOP) 0204
12
3
4
5
6
7
8910
.229 – .244
(5.817 – 6.198)
.150 – .157**
(3.810 – 3.988)
1617181920
15
14
13
12 11
.016 – .050
(0.406 – 1.270)
.015 ± .004
(0.38 ± 0.10)
× 45°
0° – 8° TYP
.0075 – .0098
(0.19 – 0.25)
.0532 – .0688
(1.35 – 1.75)
.008 – .012
(0.203 – 0.305)
TYP
.004 – .0098
(0.102 – 0.249)
.0250
(0.635)
BSC
.058
(1.473)
REF
.254 MIN
RECOMMENDED SOLDER PAD LAYOUT
.150 – .165
.0250 BSC.0165
±
.0015
.045
±
.005
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
INCHES
(MILLIMETERS)
NOTE:
1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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LTC4244IGN-1#TRPBF

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Hot Swap Voltage Controllers Rugged, CompactPCI Bus Hot Swap Cntrs
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