100mA Adjustable Positive
Voltage Regulator
LA317L
100mA Adustable Positive Voltage Regulator
General Description
•
The LA317L is an adjustable 3-terminal positive voltage
regulator capable of supplying 100mA over a 1.2V to 12V
output range. This voltage regulator is exceptionally easy
to use and requires only tow external resistors to set the
output voltage.
•
The LA317L is available in standard TO-92 and SOP-8 packages.
TO-92
SOP-8
Features
•
•
•
•
•
•
•
•
•
Adjustable output down to 1.2V
Guaranteed 100mA output current
Output short circuit protected
Line regulation: 0.01%/V
Load regulation: 0.1%
Constant current limit over temperature
Standard 3-lead transistor package
Input ripple rejection: 70dB
RoHS Compliance
Applications
•
•
•
•
High Efficiency Linear Regulators
Post Regulation for Switching Supplies
Microprocessor Power Supply
Mother Board I/O Power Supply
Ordering Information
TAITRON COMPONENTS INCORPORATED
www.taitroncomponents.com
Tel:
Fax:
(800)-TAITRON (800)-824-8766
(800)-TAITFAX (800)-824-8329
(661)-257-6060
(661)-257-6415
Rev. A/DX 2007-06-04
Page 1 of 9
100mA Adjustable Positive Voltage Regulator
LA317L
Pin Configuration
Outline: Z
TO-92
Outline: S8
SOP-8
Block Diagram
Rev. A/DX 2007-06-04
www.taitroncomponents.com
Page 2 of 9
100mA Adjustable Positive Voltage Regulator
LA317L
Absolute Maximum Ratings
(Ta=25° C, unless otherwise specified)
Symbol
V
IN-
V
OUT
I
O
T
J
T
OPR
T
STG
P
D
T
LEAD
Description
Input - Output Voltage Differential
Max. Output Current
Operating Junction Temperature
Operating Temperature Range
Storage Temperature Range
Power Dissipation
Lead Temperature (Soldering, 4sec.)
Ratings
40
100
150
-20 ~ 85
-65 ~ 150
700
260
Unit
V
mA
°C
°C
°C
mW
°C
Electrical Characteristics
(V
IN
-V
OUT
=5V, I
OUT
=40mA,P
D
≤
625mW, 0ºC
≤
T
J
≤
125ºC, unless otherwise specified)
Symbol
Description
LA317L
Min.
Typ.
Max.
Unit
Conditions
T
J
=25°, 3V≤V
IN
-V
OUT
≤15V,
I
OUT
≤20mA
(Note)
3V≤V
IN
-V
OUT
≤15V,
I
OUT
≤20mA
(Note)
T
J
=25°, 5mA≤I
OUT
≤100mA
(Note)
5mA≤I
OUT
≤101mA
(Note)
-
∆V
OUT/
V
OUT
Line Regulation
-
∆V
OUT
Load Regulation
Thermal Regulation
I
ADJ
∆I
ADJ
V
REF
I
LIMIT
I
L(MIN
)
PSRR
-
Adjustable Pin Current
Adjustable Pin Current Change
Reference Input Voltage
Current Limit
Minimum Load Current for
Regulation
Ripple Rejection
Temperature Stability
-
-
1.20
100
-
-
60
-
-
-
0.01
0.02
0.1
0.3
0.04
50
0.2
1.25
200
3.5
62
70
0.65
0.04
%/V
0.07
0.5
1.5
0.2
100
5
1.30
300
5
-
-
-
%
%
%/W T
J
=25°, 10ms Pulse
µA
µA
V
mA
mA
dB
%
-
3V≤
V
IN
-V
OUT
≤15V,
5mA≤I
OUT
≤100mA
3V≤
V
IN
-V
OUT
≤15V,
5mA≤I
OUT
≤100mA
3V≤
V
IN
-V
OUT
≤13V
3V≤
V
IN
-V
OUT
≤13V
V
OUT
=10V, f=120Hz, C
ADJ
=0µF
V
OUT
=10V, f=120Hz, C
ADJ
=10µF
0° C
≤T
J
≤125°
C
Rev. A/DX 2007-06-04
www.taitroncomponents.com
Page 3 of 9
100mA Adjustable Positive Voltage Regulator
LA317L
Symbol
-
-
-
Description
Long Term Stability
RMS Output Noise (% of V
OUT
)
Thermal Resistance Junction to
Case
LA317L
Min.
Typ.
Max.
Unit
%
%
° C/W
Conditions
T
J
=125° C, 1000 Hours
T
J
=125° C, 10Hz≤f≤10KHz
TO-92
SOP-8
-
-
-
-
0.3
0.003
185
175
-
-
-
-
Note:
Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle.
Changes in output voltage due to heating effects are covered under the specification of thermal regulation.
Typical Characteristics Curves
Fig.1- Load Regulation vs. Temperature
Output Voltage Deviation
(
V
)
Fig.2- Output Voltage vs. Input Voltage
Output Voltage
(
V
)
Temperature (° C)
Fig.3-
Reference Voltage vs. Temperature
Adjust Pin Current
(
μA
)
Reference Voltage
(
V
)
Input Voltage (V)
Fig.4- Adjust Pin Current vs. Temperature
Temperature (° C)
Temperature (° C)
Rev. A/DX 2007-06-04
www.taitroncomponents.com
Page 4 of 9
100mA Adjustable Positive Voltage Regulator
LA317L
Typical Characteristics Curves
(Continued)
Fig.5- Dropout Voltage vs. Temperature
Input-Output Differential
(
V
)
Quiescent Current
(
mA
)
Fig.6- Minimum Operating Current
Temperature (° C)
Input-Output Differential (V)
Fig.7- Ripple Rejection vs. Output Voltage
Ripple Rejection
(
dB
)
Fig.8- Ripple Rejection vs. Frequency
Ripple Rejection
(
dB
)
Output Voltage (V)
Frequency (Hz)
Rev. A/DX 2007-06-04
www.taitroncomponents.com
Page 5 of 9
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