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Электронный компонент: S1117

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Absolute Maximum Ratings
Electrical Characteristics
( Vin = 3.25V, Co = 10uF, Ta = 25C, unless otherwise specified)
Parameter
Symbol
Value
Units
Input Voltage
V
IN(MAX)
18
V
Junction Temperature
T
J
-25C ~ +125C
C
Storage Temperature
T
STG
-55C ~ +150C
C
Parameter
Symbol
Test Condition
MIn.
Typ.
Max.
Units
Reference Voltage
Vref
V
IN
= 3.25V, I
O
= 10mA
1.225
1.250
1.275
V
Line Regulation
dV
OUT1
I
OUT
=10mA, 3.25V < V
IN
< 12.25V
0
1.0
2.5
mV
Load Regulation
dV
OUT2
V
IN
= 3.25V, 10mA < I
OUT
< 1A
0
1.0
6.0
mV
Dropout Voltage 1
V
DROP1
I
OUT
= 100mA
-
1.00
1.15
V
Dropout Voltage 2
V
DROP2
I
OUT
= 1A
-
1.10
1.25
V
Quiescent Current
Iq
V
IN
< 12V
-
5
10
mA
Ripple Rejection
RR
f = 120Hz, C
OUT
= 22uF Tantalum,
4.15V < V
IN
< 4.35, I
OUT
= 500mA
55
100
200
dB
S1117
S1117
S1117
S1117
Sep 2002. Rev. 0
Features
adjustable version.
Space saving SMD types of SOT-223 and D-Pak(TO-252)
1.1V Drop-out Voltage
1.0A Output Current
Current Limiting and Thermal protection
Over Current Protection.
Ouput trimmed to 2% Tolerance
Fast Transient Response
General Description
The S1117 is a series of low dropout voltage regulators which can pro-
vide up to 1A of output current. On chip precision trimming adjusts the
refernce/output voltage to within
2%. Current limit is also trimmed to
ensure specified output current and controlled short-circuit current.
The S1117 series is available in SOT-223 and DPAK power packages.
A minimum of 10uF tantalum capacitor is required at the output to
improve the transient response and stability.
Symbol
1/4
1.0A Adjustable LDO Linear Regulator
SOT-223
PRELIMINARY
DPAK
Applications
Post Regulator for Sitching DC/DC Converter
High Efficiency Linear Regulator
Battery Chargers
PC Add on Card
Motherboard clock supplies
Electrical Characteristics
( Vin = 3.25V, Co = 10uF, Ta = 25C, unless otherwise specified)
Parameter
Symbol
Test Condition
MIn.
Typ.
Max.
Units
Current Limit
I
Limit
V
IN
- V
OUT
= 2V
1
1.5
-
A
Adjust Pin Current
Iadj
Vin = 3.25V. Io = 10mA
10
35
100
uA
Minimum Load
Current
I
Min
10
-
-
mA
Long Term Stability
Stable
T
A
= 125C, 1000hrs
-
0.03
1.0
%
RMS Output Noise
10Hz < f
< 10kHz
-
0.003
-
%
Thermal Shutdown
Tsd
Vin = 3.25V Tj = 130 to 210deg
150
170
200
C
Thermal Shutdown
Hysteresis
Thys
Vin = 3.25V Tj = 210 to 130deg
5
10
35
C
Over Voltage
Protection
V
OVP
Vin = 10V to 25V Io = 10mA
14.4
16.4
18.4
V
S1117
S1117
S1117
S1117
2/4
-20
0
20
40
60
80
100
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
4.0
V
CC
= 5.3V
V
out
= 3.3V
Temperature = Variable
I
O
= 10mA
O
u
t
put v
o
ltag
e
Temperautre
-20
0
20
40
60
80
100
0
1
2
3
4
5
6
V
CC
= 5.3V
V
OUT
= 3.3V
Temp = Variable
I
O
= 0mA
I
CC
[m
A
]
Temperature
0
5
10
15
20
0
1
2
3
4
5
6
V
CC
= Variable
V
out
= 3.3V
I
O
= 9mA
I
CC
[mA]
V
CC
vs Quiescent Current
0.0
0.2
0.4
0.6
0.8
1.0
0
2
4
6
8
10
12
14
16
V
in
= 5.3V
I
O
= variable
T
a
= 25
-
V
LO
A
D
[mV]
Output current vs. Load Regulation
0
2
4
6
8
10
12
14
16
18
0.0
0.2
0.4
0.6
0.8
1.0
1.2
Output Current [
A
]
V
IN
- V
OUT
[V]
0.0
0.2
0.4
0.6
0.8
1.0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
I
O
= variable
T
a
= 25
-
Drop
out V
o
lta
g
e
,

V
DRO
P
[V]
Output Current, I
O
[A]
Fig 1. Output current vs. drop out voltage
Fig 2. Quiescent current vs. drop out
voltage
Fig 3. Output current vs. load regulation
Fig 4. Absolute Maximum safe operating
area
Fig 5. Quiescent current vs. Temperature.
Fig 6. Output voltage vs. Temperature.
S1117
S1117
S1117
S1117
3/4
4/4
S1117
S1117
S1117
S1117
Typical Application
V
out
= (1 + R
2
/R
1
) X V
ref
Example) If R1 = 125ohm, Rd=25ohm,

V
out
= (1 + 25/125) X 1.25 = 1.5V
XWm
4
YYm
4
}pu
\}
}
YU\}GGXh
S1117
(3) IN OUT(2)
GND
(1)
XY\
Y\