DataSheet26.com

SC1532CS PDF даташит

Спецификация SC1532CS изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «400mA SmartLDOTM with Internal Pass MOSFET».

Детали детали

Номер произв SC1532CS
Описание 400mA SmartLDOTM with Internal Pass MOSFET
Производители Semtech Corporation
логотип Semtech Corporation логотип 

9 Pages
scroll

No Preview Available !

SC1532CS Даташит, Описание, Даташиты
400mA SmartLDOTM with Internal Pass
MOSFET
SC1532
January 3, 2000
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
Intended for applications such as Power Managed PCI,
the SC1532 is designed to maintain a glitch-free 3.3V
output when at least one of two inputs, 5V (VIN1) and
3.3V (VIN2), is present.
The SC1532 combines a 5V to 3.3V linear regulator
with an integral 3.3V bypass switch, along with logic
and detection circuitry to control which supply provides
the power for the output.
Whenever VIN1 exceeds a predetermined threshold
value, the internal 3.3V PMOS linear regulator is en-
abled, and the internal pass NMOS is turned off.
When VIN1 falls below a lower threshold value, the
NMOS pass device is turned on and the PMOS linear
regulator is turned off. This ensures an uninterrupted
3.3V output even if VIN1 falls out of specification.
When both supplies are simultaneously available, the
PMOS linear regulator will be turned on, and the
NMOS pass will be turned off, thus preferentially sup-
plying the output from the 5V supply.
FEATURES
Glitch-free transition between input sources
Internal logic selects input source
5V detector with hysteresis
1% regulated output voltage accuracy
400mA load current capability
APPLICATIONS
Desktop Computers
Network Interface Cards (NICs)
PCMCIA/PCI Interface Cards
Peripheral Cards
ORDERING INFORMATION
Part Number(1)
Package
SC1532CS
SO-8
Note:
(1) Add suffix ‘TR’ for tape and reel packaging.
The internal 5V detector has its upper threshold (for
VIN1 rising) set to 4.18V (typical) while the lower
threshold (for VIN falling) is at 4.1V (typical) giving a
hysteresis of approximately 80mV.
The SC1532 is available in the popular SO-8 surface
mount package.
TYPICAL APPLICATION CIRCUIT
3.3VAUX IN
5V IN
3.3V OUT
C1
4.7uF
C2
4.7uF
C3
4.7uF
U1
1
2
3
4
VIN2 GND
VIN1 GND
VO GND
CP GND
8
7
6
5
SC1532
C4
1nF
NOTES:
(1) Ceramic capacitors are recommended - see Applications Information for further details.
(2) Output capacitor C3 needs to be 1.0uF or greater for stability. Additional capacitance (tantalum or ceramic) will
improve overall performance.
© 2000 SEMTECH CORP.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320









No Preview Available !

SC1532CS Даташит, Описание, Даташиты
400mA SmartLDOTM with Internal Pass
MOSFET
SC1532
January 3, 2000
ABSOLUTE MAXIMUM RATINGS
Parameter
Input Supply Voltages
Charge Pump Capacitor Pin Voltage
Output Current
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec
Thermal Impedance Junction to Ambient(1)
ESD Rating (Human Body Model)
Symbol
VIN1, VIN2
CP
IO
TA
TJ
TSTG
TLEAD
θJA
ESD
NOTE:
(1) 1 inch square of 1/16” FR-4, double sided, 1 oz. minimum copper weight.
Maximum
-0.5 to +7
-0.5 to +16
400
-5 to +70
-5 to +125
-65 to +150
300
65
4
Units
V
V
mA
°C
°C
°C
°C
°C/W
kV
ELECTRICAL CHARACTERISTICS
Unless specified, TA = 25°C, VIN1 = 5V, VIN2 = 3.3V, IO = 400mA, CIN1 = 4.7uF, CIN2 = 4.7uF, CO = 4.7uF, Cp=1nF.
Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
MIN TYP MAX Units
VIN1
Supply Voltage
VIN1
VIN2 = 0V
4.3 5.0 5.5 V
Quiescent Current
IQ1
Reverse Leakage From VIN2(1)
VIN2
IVIN1
VIN1 = 5V, 0V VIN2 3.6V, IO = 0mA
VIN1 = 0V, VIN2 = 3.6V, IO = 0mA
2.0 3.0 mA
4.0
0 1 µA
Supply Voltage
VIN2
3.0 3.3 3.6 V
Quiescent Current
IQ2 VIN2 = 3.3V, 0V VIN1 5.5V, IO = 0mA
650 1300 µA
Reverse Leakage From VIN1(1)
5V Detect(1)(2)
IVIN2
VIN1 = 5.5V, VIN2 = 0V, IO = 0mA
2000
0 1 µA
Low Threshold Voltage
Hysteresis
High Threshold Voltage
VTH(LO)
VHYST
VTH(HI)
VIN1 Falling, IO = 20mA
IO = 20mA
VIN1 Rising, IO = 20mA
3.90 4.10
V
60 80 150 mV
4.18 4.30 V
© 2000 SEMTECH CORP.
2
652 MITCHELL ROAD NEWBURY PARK CA 91320









No Preview Available !

SC1532CS Даташит, Описание, Даташиты
400mA SmartLDOTM with Internal Pass
MOSFET
SC1532
January 3, 2000
ELECTRICAL CHARACTERISTICS (Cont.)
Unless specified, TA = 25°C, VIN1 = 5V, VIN2 = 3.3V, IO = 400mA, CIN1 = 4.7uF, CIN2 = 4.7uF, CO = 4.7uF, Cp=1nF.
Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
MIN TYP MAX Units
VO
LDO Voltage Accuracy
VIN2 Pass Device On Resis-
tance (Aux. NMOS)(1)(3)
VO
RDS(ON)
IO = 20mA
4.3V VIN1 5.5V, 0mA IO 400mA(1)
-1
-2
+1 %
+2
3.90V VIN1 4.3V, VIN2 = 3.3V,
0mA IO 400mA(1)
3.000
V
VIN1 < 3.9V, 0mA IO 400mA
360 500 m
Line Regulation
REG(LINE)
VIN1 = 4.3V to 5.5V
0.3 0.6
0.7
%
Load Regulation
REG(LOAD)
IO = 20mA to 400mA
0.3 0.6
0.7
%
Current Limit (LDO)
Output Current
ILIM
VIN1 = 5V, VIN2 = 0V, VO = 0V
600 975 1200 mA
1400
Over Temperature Protection
High Trip Level
Hysteresis
THI
THYS
VIN1=5V
VIN1=5V
175 ºC
10 ºC
NOTES:
(1) Guaranteed by design.
(2) Recommended source impedance for 5V supply: 0.125. This will ensure clean transitions between supplies
with no “chattering” (see Applications Information).
(3) Refer to block diagram.
© 2000 SEMTECH CORP.
3
652 MITCHELL ROAD NEWBURY PARK CA 91320










Скачать PDF:

[ SC1532CS.PDF Даташит ]

Номер в каталогеОписаниеПроизводители
SC1532CS400mA SmartLDOTM with Internal Pass MOSFETSemtech Corporation
Semtech Corporation

Номер в каталоге Описание Производители
TL431

100 мА, регулируемый прецизионный шунтирующий регулятор

Unisonic Technologies
Unisonic Technologies
IRF840

8 А, 500 В, N-канальный МОП-транзистор

Vishay
Vishay
LM317

Линейный стабилизатор напряжения, 1,5 А

STMicroelectronics
STMicroelectronics

DataSheet26.com    |    2020    |

  Контакты    |    Поиск