SM1117A
Elektronische Bauelemente
RoHS Compliant Product
A suffix of “-C” specifies halogen free
1A Low Dropout Positive
Adjustable or Fixed-Mode Regulator
DESCRIPTION
The SM1117A is a low dropout at positive adjustable
or fixed-mode regulator with minimum of 1A output
current capability. The product is specifically designed
to provide well-regulated supply for low voltage IC
applications such as high-speed bus termination and
low current 3.3V logic supply. SM1117A is also well
suited for other applications such as VGA cards.
SM1117A is guaranteed to have lower than 1.4V
dropout at full load current making it ideal to provide
well-regulated outputs of 1.25 to 5.0 with 6.4V to 12V
input supply.
SOT-89
4
1
A
E
2
3
C
B
F
G
H
J
REF.
A
B
C
D
E
F
Millimeter
Min.
Max.
4.40
4.60
3.94
4.25
1.40
1.60
2.30
2.60
1.50
1.70
0.89
1.20
D
K
L
REF.
G
H
J
K
L
Millimeter
Min.
Max.
0.40
0.58
1.50 TYP
3.00 TYP
0.32
0.52
0.35
0.44
FEATURES
1.4Vmaximum dropout full load current
Fast transient response
Output current limiting
Built-in thermal shutdown
Good noise rejection
3-Terminal Adjustable or Fixed 1.5V, 1.8V,
2.5V, 3.3V, 5.0V
APPLICATIONS
PC peripheral
Communication
MARKING
Production A Line
Vout
1117
Date Code
1.5V: -15
1.8V: -18
2.5V: -25
3.3V: -33
5.0V: -50
ADJ: Blank
ADJ (Gnd)
Vout
Vin
Production B Line
Vout
GS1117Y
Date Code
1.5V: 15
1.8V: 18
2.5V: 25
3.3V: 33
5.0V: 50
ADJ: Blank
ADJ (Gnd) Vout
Vin
PACKAGE INFORMATION
Package
SOT-89
MPQ
1K
Leader Size
7’ inch
http://www.SeCoSGmbH.com/
Any changes of specification will not be informed individually.
01-Jun-2011 Rev. B
Page 1 of 4
SM1117A
Elektronische Bauelemente
1A Low Dropout Positive
Adjustable or Fixed-Mode Regulator
TYPICAL CIRCUIT
BLOCK DIAGRAM
PIN DESCRIPTIONS
Name
Adj (Gnd)
V
OUT
I/O
I
O
Pin#
1
2
Description
A resistor divider from this pin to the V
OUT
pin and ground sets the output voltage
(Ground only for fixed mode)
The output pin of regulator. A min. of 10μF capacitor must be connected from this pin
to ground to insure stability.
The input pin of regulator. Typically a large storage capacitor is connected from this
pin to ground to insure that the input voltage does not sag below the min. dropout
voltage during the load transient response.
This pin must always be 1.3V higher than V
OUT
in order for the device to regulate
properly.
V
IN
I
3
ABSOLUTE MAXIMUM RATINGS
Parameter
DC Supply Voltage
Power Dissipation (T
A
= 25°C)
Operating & Temperature Range
Symbol
Vin
P
D
T
STG
Ratings
-0.3 to 12
Unit
V
Internally Limited
0~150,-65~150
°C
http://www.SeCoSGmbH.com/
Any changes of specification will not be informed individually.
01-Jun-2011 Rev. B
Page 2 of 4
SM1117A
Elektronische Bauelemente
1A Low Dropout Positive
Adjustable or Fixed-Mode Regulator
ELECTRICAL CHARACTERISTICS
Parameter
Reference Voltage
SM1117A-ADJ
SM1117A-1.5
SM117A-1.8
Test Conditions
I
o
=10mA, T
J
=25°C, (V
IN
-
V
OUT
)=1.5V
I
o
=10mA, T
J
=25°C, 3.0V≦V
IN
≦12V
I
o
=10mA, T
J
=25°C, 3.3V≦V
IN
≦12V
I
o
=10mA, T
J
=25°C, 4.0V≦V
IN
≦12V
I
o
=10mA, T
J
=25°C, 4.8V≦V
IN
≦12V
I
o
=10mA, T
J
=25°C, 6.5V≦V
IN
≦12V
I
o
=10mA, V
OUT
+1.5V<V
IN
<12V, T
J
=25°C
Min.
1.225
1.47
1.764
2.45
3.235
4.9
-
-
-
-
-
-
-
-
1.1
Typ.
1.25
1.5
1.8
2.5
3.3
5
-
-
12
15
20
26
40
1.3
-
5
0.008
Max
1.275
1.53
1.836
2.55
3.365
5.1
0.2
1
15
18
25
33
50
1.4
-
10
0.04
Unit
V
V
V
V
V
V
%
%
mV
mV
mV
mV
mV
V
A
mA
%W
Output Voltage
SM117A-2.5
SM117A-3.3
SM117A-5.0
Line Regulation
SM117A-XXX
SM117A-ADJ
1,2
V
IN
=3.3V, Vadj=0, 10mA< I
o
<1A, T
J
=25°C
SM117A-1.5
1,2
V
IN
=3.0V, 0mA<I
o
<1A, T
J
=25°C
V
IN
=3.3V, 0mA<I
o
<1A, T
J
=25°C
V
IN
=4.0V, 0mA<I
o
<1A, T
J
=25°C
V
IN
=5.0V, 0mA<I
o
<1A, T
J
=25°C
V
IN
=8.0V, 0mA<I
o
<1A, T
J
=25°C
I
o
=1A, (ΔV
out
=0.1% V
out
)
V
IN
– V
OUT
=5V
V
IN
=5V
Load Regulation
SM117A-1.8
1,2
SM117A-2.5
1,2
SM117A-3.3
1,2
SM117A-5.0
1,2
Dropout Voltage
(V
IN
-V
OUT
)
Current Limit
SM117A-XXX
SM117A-XXX
Minimum Load Current
Adjustable model
Thermal Regulation
Ripple Rejection
Temperature Stability
θ
JA
Thermal Resistance
Junction-to-Ambient
(No heat sink ;No air flow)
-
-
T
A
=25°C, 30ms pulse
F=120Hz, C
OUT
=25
μ
F Tantalum, I
OUT
=1A
SM117AXXX
I
o
=10mA
V
IN
=V
OUT
+3V
-
-
-
-
60
0.5
300
100
70
-
-
-
dB
%
°C/W
°C/W
θ
JC
Thermal Resistance
Control Circuitry/Power Transistor
Junction-to-Case
Note:
1. See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at
a constant junction Temperature by low duty cycle pulse testing. Load regulation is measured at the output lead =1/18”. from the
package.
2. Line and load regulation are guaranteed up to the maximum power dissipation of 15W.Power dissipation is determined by the
difference between input and output and the output current .Guaranteed maximum power dissipation will not be available over
the full input/output range.
3. Quiescent current is defined as the minimum output current required in maintaining regulation .At 12V input/output
differential the device is guaranteed to regulate if the output current is greater than 10mA.
http://www.SeCoSGmbH.com/
Any changes of specification will not be informed individually.
01-Jun-2011 Rev. B
Page 3 of 4
SM1117A
Elektronische Bauelemente
1A Low Dropout Positive
Adjustable or Fixed-Mode Regulator
CHARACTERISTIC CURVES
http://www.SeCoSGmbH.com/
Any changes of specification will not be informed individually.
01-Jun-2011 Rev. B
Page 4 of 4
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