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SC1548CSK-1.5TR PDF даташит

Спецификация SC1548CSK-1.5TR изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «Linear Fet Controller».

Детали детали

Номер произв SC1548CSK-1.5TR
Описание Linear Fet Controller
Производители Semtech Corporation
логотип Semtech Corporation логотип 

14 Pages
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SC1548CSK-1.5TR Даташит, Описание, Даташиты
SC1548
Linear Fet Controller
POWER MANAGEMENT
Description
Features
The SC1548 is a power supply controller designed to
provide a simple single regulated power supply with over
current protection. It is part of Semtech’s SmartLDO™
family of products. The SC1548 can provide a 1.818V
power supply for the I/O plane or 1.515V for GTL+ / AGP
from either 3.3V or 2.5V. An adjustable option allows
generation and control of any voltage from 1.263V up to
5V.
SC1548 features include tight output voltage regulation,
an enable control and over current protection. Over
current protection is provided by feedback to the sense
pin. If the output drops below 50% of the nominal
output voltage (typical) for greater than 4ms (typical), the
output will be shut down.
u ± 2.5% output accuracy over line, load and
temperature
u 1.515V, 1.818V and adjustable output voltage
options available
u Enable control
u Over current protection
u 5-pin SOT-23 package
Applications
u Motherboards
u Graphics cards
u Microcontrollers
u Simple power supplies
The SC1548 is available in a tiny 5-pin SOT-23 surface
mount package.
Typical Application Circuit
Fixed Output Voltage Versions
1.818V OUT
Q1
IRL530N
+ C1
100uF
+ C2
100uF
+ C3
22uF
3.3V IN
12V IN
U1
1 SNS EN 5
2 GND
34
DRV IN
SC1548CSK-1.8
ENABLE
C4
0.1uF
Adjustable Output Voltage Version
2.5V OUT
R1
97.6
+ C1
100uF
Q1
IRL530N
+ C2
100uF
+ C3
22uF
R2
100
3.3V IN
12V IN
U1
1 ADJ EN 5
2
GND
3 DRV IN 4
SC1548CSK
ENABLE
C4
0.1uF
Revision 1, January 2001
1
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SC1548CSK-1.5TR Даташит, Описание, Даташиты
SC1548
POWER MANAGEMENT
Absolute Maximum Ratings
Parameter
Symbol
Maximum
Units
Input Supply Voltage
Input Pins
Thermal Impedance Junction to Case
Thermal Impedance Junction to Ambient
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec
VIN
VADJ, VEN, VSNS
qJC
qJA
TA
TJ
TSTG
TLEAD
-0.5 to +15
-0.5 to +7
81
256
0 to +70
0 to +125
-65 to +150
300
V
V
°C/W
°C/W
°C
°C
°C
°C
Electrical Characteristics(1)
Unless specified: TA = 25°C, VIN = 12V, VPWR = 3.3V, IOUT = 0A. Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
Min Typ Max Units
IN
Supply Voltage
Quiescent Current
VIN
IQ
11.28
12.00
1.0
12.72
1.5
2.0
V
mA
Undervoltage Lockout
Start Threshold
UVLO
7 8 9V
EN
Enable Pin Current
Threshold Voltage
Hysteresis
Enable Delay Time(2)(3)
IEN
VTH(EN)
VHYST
tD(ON)
Disable Delay Time(2)(3)
tD(OFF)
SNS (Fixed Output Voltage Parts)
VEN = 0V
VEN rising
VEN = Low to High, measured from
VEN = VTH(EN) to 10% VDRV
VEN = High to Low, measured from
VEN = VTH(EN) to 90% VDRV
100 150 µA
1.8 2.3 V
200 mV
500 ns
150 ns
Sense Pin Current
ISNS
ADJ (Adjustable Output Voltage Parts)
Sinking
75 100 125 µA
Adjust Pin Current
Reference Voltage(2)
IADJ
VADJ
Sourcing
3.0V
£
V (4)
PWR
£
3.6V,
1mA
£
IOUT
£
1A
-1.5%
-2.5%
0.25
1.263 +1.5%
+2.5%
µA
V
ã 2001 Semtech Corp.
2
www.semtech.com









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SC1548CSK-1.5TR Даташит, Описание, Даташиты
SC1548
POWER MANAGEMENT
Electrical Characteristics (Cont.)(1)
Unless specified: TA = 25°C, VIN = 12V, VPWR = 3.3V, IOUT = 0A. Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
Min Typ
Max Units
Output Voltage Regulation (Fixed Output Voltage Parts)
Output Voltage(2)
VOUT
3.0V
£
V (4)
PWR
£
3.6V,
1mA
£
IOUT
£
1A
-1.5%
-2.5%
DRV
Output Current
Output Voltage
Rise Time(2)(3)
Fall Time(2)(3)
Overcurrent Protection
IDRV
VDRV
tr
tf
VDRV = 4V, VSNS = 1.2V
Full On, IDRV = 0mA
VEN = Low to High, measured from
VEN = VTH(EN) to 90% VDRV
VEN = High to Low, measured from
VEN = VTH(EN) to 10% VDRV
5
9.0
Trip Threshold
Power-up Output Short
Circuit Immunity
VTH(OC)
30
1
Output Short Circuit Glitch
Immunity
0.5
Control Section
Bandwidth
VDRV = 9V, THD = 5%, CL = 600pF
Notes:
(1) This device is ESD sensitive. Use of standard ESD handling precautions is required.
(2) See Application Circuit on page 1.
(3) See Timing Diagram on page 4.
(4) Connected to FET drain.
VOUT
+1.5%
+2.5%
V
10 mA
10.5 V
1.0 ms
550 µs
50 70 %VOUT
5 60 ms
4 10 ms
5 MHz
ã 2001 Semtech Corp.
3
www.semtech.com










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Номер в каталогеОписаниеПроизводители
SC1548CSK-1.5TRLinear Fet ControllerSemtech Corporation
Semtech Corporation

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