Order this document by LM317M/D
LM317M,
LM317MA
Three-Terminal Adjustable
Output Positive Voltage
Regulator
The LM317M is an adjustable three–terminal positive voltage regulator
capable of supplying in excess of 500 mA over an output voltage range of
1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires
only two external resistors to set the output voltage. Further, it employs
internal current limiting, thermal shutdown and safe area compensation,
making it essentially blow–out proof.
The LM317M serves a wide variety of applications including local,
on–card regulation. This device also makes an especially simple adjustable
switching regulator, a programmable output regulator, or by connecting a
fixed resistor between the adjustment and output, the LM317M can be used
as a precision current regulator.
•
Output Current in Excess of 500 mA
MEDIUM CURRENT
THREE–TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2
(All 3 Packages)
Pin 1. Adjust
2. Vout
3. Vin
•
•
•
•
•
•
Output Adjustable between 1.2 V and 37 V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe–Area Compensation
Floating Operation for High Voltage Applications
Eliminates Stocking Many Fixed Voltages
1
2
3
1
2
3
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369
(DPAK)
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
(DPAK)
1
3
Simplified Application
Vin
Vout
R1
240
*
Cin
0.1µF
IAdj
Adjust
**
+C
O
1.0µF
Heatsink Surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
Vout
Vin
LM317M
ORDERING INFORMATION
Device
LM317MT
LM317MAT
LM317MBT#
LM317MABT#
LM317MDT
LM317MADT
LM317MDT–1
LM317MADT–1
Operating
Temperature Range Package
TJ = 0° to +125°C
TJ = –40° to +125°C
Plastic
Power
Plastic
Power
R2
TJ = 0° to 125°C
DPAK
* = Cin is required if regulator is located an appreciable distance from power supply filter.
** = CO is not needed for stability, however, it does improve transient response.
Vout
+
1.25 V 1
)
R2
)
IAdj R2
R1
LM317MBDT
LM317MABDT
LM317MBDT–1
LM317MABDT–1
TJ = –40° to 125°C
DPAK
Since IAdj is controlled to less than 100
µA,
the error associated with this
term is negligible in most applications.
# Automotive temperature range selections are
#
available with special test conditions and additional
#
tests. Contact your local Motorola sales office for
#
information.
©
Motorola, Inc. 1998
Rev4
MOTOROLA ANALOG IC DEVICE DATA
1
MOTOROLA [ MOTOROLA, INC ]
