SC1538CS25

Manufacturer Part NumberSC1538CS25
DescriptionDUAL LINEAR CONTROLLER
ManufacturerSemtech Corporation
SC1538CS25 datasheet
 


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PRELIMINARY - October 5, 1999
DESCRIPTION
The SC1538 is a dual power supply controller designed
to simplify power management on motherboards. It is
part of Semtech’s Smart LDO™ 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.
BLOCK DIAGRAM
PIN CONFIGURATION
Top View
(SO-8)
© 1999 SEMTECH CORP.
DUAL LINEAR CONTROLLER
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
FEATURES
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
Motherboards
Simple dual power supplies
ORDERING INFORMATION
(1)
Part Number
SC1538CS15/18
SC1538CS25/25
Note:
(1) Add suffix ‘TR’ 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
Thermal Impedance
Junction to Case
ESD Rating
652 MITCHELL ROAD NEWBURY PARK CA 91320
SC1538
Output Voltages
Package
1.515V and 1.818V
SO-8
2.525V and 2.525V
SO-8
Symbol
Maximum
Units
VIN
-0.5 to +15
V
-0.5 to +7
V
T
0 to +70
°C
A
T
0 to +125
°C
J
T
-65 to +150
°C
STG
T
300
°C
LEAD
130
°C/W
JA
47
°C/W
JC
ESD
2
kV
1

SC1538CS25 Summary of contents

  • Page 1

    ... 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 ...

  • Page 2

    PRELIMINARY - October 5, 1999 PIN DESCRIPTION Pin Pin Name Pin Function 1 DRV1 Output of regulator #1. Drives the gate of an N-channel MOSFET to maintain 1.818V/ 2.525V. 2 SNS1 Regulator #1 Sense input. Use as a remote sense ...

  • Page 3

    PRELIMINARY - October 5, 1999 ELECTRICAL CHARACTERISTICS Unless specified 25°C. Values in bold apply over full operating temperature range. A Parameter Symbol VIN Supply Voltage VIN Quiescent Current I Q Undervoltage Lockout Start Threshold UVLO Enable Enable Pin ...

  • Page 4

    PRELIMINARY - October 5, 1999 OUTLINE DRAWING - SO-8 LAND PATTERN - SO-8 ECN99-633 - 10-5-99 © 1999 SEMTECH CORP. DUAL LINEAR CONTROLLER 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1538 JEDEC REF: MS-012AA 4 ...