KSI-2021-005
1
S1117-xxD
Fixed LDO Voltage Regulator
Descriptions
The S1117 series of positive fixed regulators are designed to provide 1A with higher
efficiency than currently available devices. All internal circuitry is designed to operate down
to 700mV input to output differential and the dropout voltage is fully specified as a function
of load current. Dropout voltage of the device is 100mV at light loads and rising to 700mV
at maximum output current. A second low current input is required to achieve this dropout.
The S1117 can also be used as a single supply device.
Features
Output Current of 1A
1.2V Maximum Dropout voltage at 1A Output Current
0.04% Line Regulation
0.1% Load Regulation
100% Thermal Limit Burn-In
Fast Transient Response
Ordering Information
Type NO. Marking Package Code
S1117xxD S1117D D-PAK
:Voltage Code (15:1.5V,18V:1.8V, 25:2.5V, 285:2.85V, 33:3.3V, 50:5.0V)
Outline Dimensions unit :
mm
S
S
e
e
m
m
i
i
c
c
o
o
n
n
d
d
u
u
c
c
t
t
o
o
r
r
PIN Connections
1. GND
2. Output
3. Input
KSI-2021-005
2
S1117-xxD
Absolute Maximum Ratings
Ta=25
C
Characteristic Symbol
Ratings
Unit
Operating Input voltage
V
IN
20 V
Power Dissipation (without Heatsink)
P
D
2.0
W
Lead Temperature (Soldering, 10 sec)
T
LEAD
300 C
Operating Junction Temperature
T
OPR
-30 ~ 125
C
Storage Temperature
T
STG
-55 ~ 150
C
Electrical Characteristics
(T
J
= 0 to 125,Cin=10uF, Cout=10uF unless otherwise specified.)
S1117-15D
Characteristic Symbol
Test
Condition
Min Typ Max
Unit
Output Voltage
V
OUT
V
IN
= 3.5V, I
OUT
= 10mA, T
j
= 25C
V
IN
= 2.9V to 11.5V, I
OUT
= 0 to 1000mA
1.485
1.470
1.5
1.515
1.530
V
Line Regulation
V
OUT
(V
out
+1.5V) V
in
12V, I
OUT
=10mA
- 0.04 0.2 %
Load Regulation
V
OUT
(V
IN -
V
out
)=2V, 10mA
I
OUT
1A
- 0.08 0.4 %
Quiescent Current
I
Q
V
IN
= 11.5V, I
OUT
=0mA -
3.6
10
mA
Dropout Voltage
V
D
I
OUT
=100mA
I
OUT
=500mA
I
OUT
=1000mA
-
-
-
1.00
1.05
1.10
1.10
1.15
1.20
V
Ripple Rejection
RR
V
IN
-V
OUT
=3V, f=120Hz, I
OUT
=1000mA
60
72
-
dB
Output Noise Voltage
eN
f=10 to 10KHz, T
j
= 25C
- 100 - uV
Output Current
I
OUT
V
IN
-V
OUT
= 3V, T
j
= 25C
1000 1500 - mA
KSI-2021-005
3
Electrical Characteristics
(T
J
= 0 to 125, Cin=10uF, Cout=10uF unless otherwise specified.)
S1117-18D
Characteristic Symbol
Test
Condition
Min Typ Max
Unit
Output Voltage
V
OUT
V
IN
= 3.8V, I
OUT
= 10mA, T
j
= 25C
V
IN
= 3.3V to 11.8V, I
OUT
= 0 to 1000mA
1.782
1.764
1.8
1.818
1.836
V
Line Regulation
V
OUT
(V
out
+1.5V) V
in
12V, I
OUT
=10mA
- 0.04 0.2 %
Load Regulation
V
OUT
(V
IN -
V
out
)=2V, 10mA
I
OUT
1A
- 0.08 0.4 %
Quiescent Current
I
Q
V
IN
= 11.8V, I
OUT
=0mA -
4.2
10
mA
Dropout Voltage
V
D
I
OUT
=100mA
I
OUT
=500mA
I
OUT
=1000mA
-
-
-
1.00
1.05
1.10
1.10
1.15
1.20
V
Ripple Rejection
RR
V
IN
-V
OUT
=3V, f=120Hz, I
OUT
=1000mA
60
72
-
dB
Output Noise Voltage
eN
f=10 to 10KHz, T
j
= 25C
- 100 - uV
Output Current
I
OUT
V
IN
-V
OUT
= 3V, T
j
= 25C
1000 1500 - mA
S1117-xxD
KSI-2021-005
4
S1117-xxD
Electrical Characteristics
(T
J
= 0 to 125, Cin=10uF, Cout=10uF unless otherwise specified.)
S1117-25D
Characteristic Symbol
Test
Condition
Min Typ Max
Unit
Output Voltage
V
OUT
V
IN
= 4.5V, I
OUT
= 10mA, T
j
= 25C
V
IN
= 3.9V to 10V, I
OUT
= 0 to 1000mA
2.475
2.450
2.5
2.525
2.550
V
Line Regulation
V
OUT
(V
out
+1.5V) V
in
12V, I
OUT
=10mA
- 0.04 0.2 %
Load Regulation
V
OUT
(V
IN -
V
out
)=2V, 10mA
I
OUT
1A
- 0.08 0.4 %
Quiescent Current
I
Q
V
IN
= 10V, I
OUT
=0mA -
5.2
10
mA
Dropout Voltage
V
D
I
OUT
=100mA
I
OUT
=500mA
I
OUT
=1000mA
-
-
-
1.00
1.05
1.10
1.10
1.15
1.20
V
Ripple Rejection
RR
V
IN
-V
OUT
=3V, f=120Hz, I
OUT
=1000mA
60
72
-
dB
Output Noise Voltage
eN
f=10 to 10KHz, T
j
= 25C
- 100 - uV
Output Current
I
OUT
V
IN
-V
OUT
= 3V, T
j
= 25C
1000 1500 - mA
KSI-2021-005
5
Electrical Characteristics
(T
J
= 0 to 125, Cin=10uF, Cout=10uF unless otherwise specified.)
S1117-285D
Characteristic Symbol
Test
Condition
Min Typ Max
Unit
Output Voltage
V
OUT
V
IN
= 4.85V, I
OUT
= 10mA, T
j
= 25C
V
IN
= 4.25V to 10V, I
OUT
= 0 to 1000mA
2.822
2.793
2.85
2.879
2.907
V
Line Regulation
V
OUT
(V
out
+1.5V) V
in
12V, I
OUT
=10mA
- 0.04 0.2 %
Load Regulation
V
OUT
(V
IN -
V
out
)=2V, 10mA
I
OUT
1A
- 0.08 0.4 %
Quiescent Current
I
Q
V
IN
= 10V, I
OUT
=0mA -
5.5
10
mA
Dropout Voltage
V
D
I
OUT
=100mA
I
OUT
=500mA
I
OUT
=1000mA
-
-
-
1.00
1.05
1.10
1.10
1.15
1.20
V
Ripple Rejection
RR
V
IN
-V
OUT
=3V, f=120Hz, I
OUT
=1000mA
60
72
-
dB
Output Noise Voltage
eN
f=10 to 10KHz, T
j
= 25C
- 100 - uV
Output Current
I
OUT
V
IN
-V
OUT
= 3V, T
j
= 25C
1000 1500 - mA
S1117-xxD
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