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SC1538CS15 PDF даташит

Спецификация SC1538CS15 изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «DUAL LINEAR CONTROLLER».

Детали детали

Номер произв SC1538CS15
Описание DUAL LINEAR CONTROLLER
Производители Semtech Corporation
логотип Semtech Corporation логотип 

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SC1538CS15 Даташит, Описание, Даташиты
DUAL LINEAR CONTROLLER
SC1538
PRELIMINARY - October 5, 1999
DESCRIPTION
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
FEATURES
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.
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
Part Number(1)
SC1538CS15/18
SC1538CS25/25
Output Voltages Package
1.515V and 1.818V SO-8
2.525V and 2.525V SO-8
BLOCK DIAGRAM
PIN CONFIGURATION
Top View
Note:
(1) Add suffix ‘TR’ for tape and reel packaging.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum Units
Input Supply Voltage
VIN -0.5 to +15 V
Input Pins
-0.5 to +7 V
Operating Temperature
Range
TA
0 to +70 °C
Operating Junction
Temperature
TJ 0 to +125 °C
Storage Temperature
Range
TSTG -65 to +150 °C
Lead Temperature
(Soldering) 10 Sec
TLEAD
300
°C
Thermal Temperature
Junction to Ambient
θJA
130 °C/W
Thermal Impedance
Junction to Case
θJC
47 °C/W
ESD Rating
ESD 2 kV
(SO-8)
© 1999 SEMTECH CORP.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320









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SC1538CS15 Даташит, Описание, Даташиты
DUAL LINEAR CONTROLLER
SC1538
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 to the source of the N-channel MOSFET
(Output 1).
3 EN1 Active high enable control with internal pullup. Output of regulator #1 turns off when EN1 is
taken low.
4 GND Ground
5 EN2 Active high enable control with internal pullup. Output of regulator #2 turns off when EN2 is
taken low.
6 SNS2 Regulator #2 Sense input. Use as a remote sense to the source of the N-channel MOSFET
(Output 2).
7 DRV2 Output of regulator #2. Drives the gate of an N-channel MOSFET to maintain 1.515V/
2.525V.
8 VIN +12V Supply.
APPLICATION CIRCUIT
1.818V / 2.525V OUT
1.818V / 2.525V ENABLE
C1
100uF
Q1
PHB11N06LT
C2
100uF
C3
100uF
3.3V IN
12V IN
Q2
PHB11N06LT
C4
100uF
C5
100uF
C6
100uF
1.515V / 2.525V OUT
R1 R2
10k 10k
U1
1 DRV1
2 SNS1
3 EN1
4 GND
VIN
DRV2
SNS2
EN2
8
7
6
5
SC1538
C7
0.1uF
1.818V / 2.525V ENABLE
© 1999 SEMTECH CORP.
2
652 MITCHELL ROAD NEWBURY PARK CA 91320









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SC1538CS15 Даташит, Описание, Даташиты
DUAL LINEAR CONTROLLER
SC1538
PRELIMINARY - October 5, 1999
ELECTRICAL CHARACTERISTICS
Unless specified, TA = 25°C. Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
VIN
Supply Voltage
VIN
Quiescent Current
IQ
Both EN High
One or both EN Low
Undervoltage Lockout
Start Threshold
Enable
Enable Pin Current
UVLO
IEN
Threshold Voltage
Hysteresis
Enable Delay Time(1)
Disable Delay Time(1)
VTH
VHYST
tD(ON)
tD(OFF)
DRV
Output Current
Output Voltage
Rise Time(1)
IDRV
VDRV
tr
Fall Time(1)
Output Voltage Regulation
Output Voltage(1)
tf
VO
Input = Low
VEN rising
EN = Low to High, measured from
EN = VTH to 10% DRV
EN = High to Low, measured from
EN = VTH to 90% DRV
Full On
EN = Low to High, measured from
EN = VTH to 90% DRV
3.0V
V (2)
FET
3.6V,
1mA
IO
1A
Overcurrent Protection
Trip Threshold
Power-up Output Short
Circuit Immunity
Output Short Circuit Glitch
Immunity
Control Section
Bandwidth
NOTES:
(1) See Application Circuit
(2) Connected to FET drains.
VOC
DRV = 9V, THD = 5%, CL = 600pF
MIN TYP MAX Units
11.28 12.00 12.72
23
4
1.5 2.0
2.5
V
mA
mA
7 8 9V
50 100 µA
150
1.6 2.3 V
100 180 300 mV
500 ns
150 ns
5 10
9.0 10.5
1.6
550
mA
V
ms
ns
-1.5% VO +1.5% V
-2.5%
+2.5%
-20% 1.00 +15% V
1 5 60 ms
0.5 4
6 ms
5 MHz
3
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320










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