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Datasheet: S1117-18 (AUK Corporation)

Adjustable and Fixed LDO Voltage Regulator

 

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AUK Corporation
KSI-2068-002
1
S1117API/S1117-xxPI
Adjustable and Fixed LDO Voltage Regulator



Descriptions
The S1117 series of positive adjustable and fixed regulators are designed to provide 1A
with high efficiency. All internal circuitry is designed to operate down to 1.3V input to
output differential. On-chip trimming adjusts reference voltage to 2%.
Features
Adjustable or Fixed output
Output Current of 1A
Low Dropout, 1.3V maximum at 1A Output Current
Thermal Shutdown Protection
Fast Transient Response

Ordering Information
Type NO.
Marking
Package Code
S1117API/S1117xxPI
S1117PI/ S1117PI
TO-220F
:Voltage Code (Aj : 1.25V, 15:1.5V,:18: 1.8V, 25:2.5V, 33:3.3V, 50:5.0V)
:Voltage Code (285:2.85V)


















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/Adj
2. Output voltage
3. Input voltage
Outline Dimensions
(Unit : mm )
BLOCK DIAGRAM
KSI-2068-002
2
S1117API/S1117-xxPI
Absolute Maximum Ratings
Ta=25
C
Characteristic Symbol
Rating
Unit
Input voltage
V
I
16
V
Power Dissipation
P
D
2.0
W
Junction Temperature
T
J
150
C
Storage Temperature Range
T
stg
-55 ~ 150
C
Device Selection Guide
(NOTE1)























Device Output
Voltage
S1117API Adjustable
S1117-15PI 1.5V
S1117-18PI 1.8V
S1117-25PI 2.5V
S1117-285PI 2.85V
S1117-33PI 3.3V
S1117-50PI 5.0V
Note 1 : Other fixed versions are available V
O
=1.5V to 5V
KSI-2068-002
3
S1117API/S1117-xxPI

Electrical Characteristics
(Electrical Characteristics at T
J
= 25 and V
I
=(V
O
+1.5V), I
L
=10 , C
O
=10 unless otherwise specified.)
Characteristic Symbol
Device
Test Condition
Min Typ Max
Unit
V
I
= (V
O
+1.5V),I
O
= 10
1.225
1.275
S1117A
V
I
= (V
O
+1.5V) to 7V
I
O
= 0 to 1000
* 1.200
1.25
1.300
V
I
= (V
O
+1.5V),I
O
= 10
1.470
1.530
S1117-
15
V
I
= (V
O
+1.5V) to 7V
I
O
= 0 to 1000
* 1.440
1.5
1.560
V
I
= (V
O
+1.5V),I
O
= 10
1.764
1.836
S1117-
18
V
I
= (V
O
+1.5V) to 7V
I
O
= 0 to 1000
* 1.728
1.8
1.872
V
I
= (V
O
+1.5V),I
O
= 10
2.450
2.550
S1117-
25
V
I
= (V
O
+1.5V) to 7V
I
O
= 0 to 1000
* 2.400
2.5
2.600
V
I
= (V
O
+1.5V),I
O
= 10
2.793
2.907
S1117-
285
V
I
= (V
O
+1.5V) to 7V
I
O
= 0 to 1000
* 2.736
2.85
2.964
V
I
= (V
O
+1.5V),I
O
= 10
3.234 3.3 3.366
S1117-
33
V
I
= (V
O
+1.5V) to 7V
I
O
= 0 to 1000
* 3.168
3.432
V
I
= (V
O
+1.5V),I
O
= 10
4.900 5.0 5.100
Output Voltage
V
O
S1117-
50
V
I
= (V
O
+1.5V) to 7V
I
O
= 0 to 1000
* 4.800
5.200
V
Line Regulation
(Note2)
V
O(VI)
All
1.5V V
I
-V
O
7V
I
O
=10
- 5 10
Load Regulation
(Note2)
V
O(IL)
All
V
I
=(V
O
+1.5V)
I
O
=10 ~ 1000
- 10 30
Quiescent
Current
I
QC
All
V
I
= V
O
+ 1.5V
V
ADJ
=0V
* - 7 13
Minimum Load
Current
I
L(MIN)
S1117A V
I
=(V
O
+1.5V), V
O
=0V *
3
7
Adjust Pin
Current
I
ADJ
S1117A
V
I
= (V
O
+1.5V) to 7V
I
O
= 10
* 55 90
Dropout Voltage
(Note4)
V
DROP
All
I
O
=1000
* - 1.2 1.3 V
Ripple Rejection
(Note3)
RR All
V
I
-V
O
=1.5V, I
O
=1000
V
Ripple
=1V
P-P
, f=120
60 72 -
Current Limit
I
LIMIT
All
(V
I
-V
O
)=1.5V *
1
A
The * denotes the specifications which apply over the full temperature range.
Note 2: Low duty pulse testing with Kelvin connections required.
Note 3: 120 input ripple (C
ADJ
for ADJ=25 )
Note 4: V
O
= 1%

KSI-2068-002
4
S1117API/S1117-xxPI
Typical Applications
C
V
R
S1117A
10
10
O
(Fixed Version)
Adj/GND
O
I
L
I
V
C
Fig. 1 Fixed Voltage Regulator
125
(1
)
225
(1
)
C
10
Adj
Vout=3.5V
S1117-xx
1
I
10
2
O
O
C
(Fixed Version)
V
I
R
V
R
V
O
=V
ADJ
* (1 + R
2
/R
1
) + I
ADJ
*R
2
Fig. 2 Adjustable Voltage Regulator
Notes:
1) C
I
needed if device is far from filter capacitors
2) C
O
minimum value required for stability
I
ADJ
KSI-2068-002
5
S1117API/S1117-xxPI
Electrical Characteristic Curves




































Fig. 3 V
DROP
vs. I
O
Fig. 4 V
O
vs. T
a
Fig. 6 Temperature Stability
Fig. 8 P
D
vs. T
a
Fig. 5 RR vs. Frequency
Fig. 7 I
ADJ
vs. T
a
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