DUAL LINEAR CONTROLLER
SC1538
PRELIMINARY - October 5, 1999
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The SC1538 is a dual power supply controller designed
to simplify power management on motherboards. It is
part of Semtech鈥檚 Smart LDO鈩?family of products.
The SC1538CS15/18 can provide a 1.818V power sup-
ply for the I/O plane and a 1.515V power supply for the
GTL+ and AGP planes. The SC1538CS25/25 can pro-
vide two 2.525V supplies for clock and memory.
SC1538 features include Enable controls for each lin-
ear FET controller and over current protection. Over
current protection is provided by feedback to the sense
pins. If any output drops below 1V (typical) for greater
than 4ms (typical), that output will shut down.
The SC1538 is available in a SO-8 surface mount
package.
FEATURES
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Dual power supplies
1.515V Supply for GTL+ and AGP planes/1.818V
Supply for chipset I/O and memory termination
Dual 2.525V supplies for clock and memory
Individual Enable control of each supply
Over current protection
APPLICATIONS
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Motherboards
Simple dual power supplies
ORDERING INFORMATION
Part Number
(1)
Output Voltages
1.515V and 1.818V
2.525V and 2.525V
Package
SO-8
SO-8
SC1538CS15/18
SC1538CS25/25
BLOCK DIAGRAM
Note:
(1) Add suffix 鈥楾R鈥?for tape and reel packaging.
ABSOLUTE MAXIMUM RATINGS
Parameter
Input Supply Voltage
Input Pins
Operating Temperature
Range
Operating Junction
Temperature
Storage Temperature
Range
Lead Temperature
(Soldering) 10 Sec
Thermal Temperature
Junction to Ambient
T
A
T
J
T
STG
T
LEAD
胃
JA
胃
JC
ESD
Symbol
VIN
Maximum
-0.5 to +15
-0.5 to +7
0 to +70
0 to +125
-65 to +150
300
130
47
2
Units
V
V
擄C
擄C
擄C
擄C
擄C/W
擄C/W
kV
PIN CONFIGURATION
Top View
Thermal Impedance
Junction to Case
ESD Rating
(SO-8)
1
漏 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
SC1538CS25相關(guān)型號PDF文件下載
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