Datasheet

R1
OUTPUT
INPUT
OUTPUT
ADJ/GND
R2
C
adj
C
OUT
0.1 Fμ 10 Fμ
Ground
Ground
High
Frequency
Bypass
Capacitor
High Input
Bypass
Capacitor
Power
LM317M
www.ti.com SLVS297P –APRIL 2000–REVISED MARCH 2014
9 Power Supply Recommendations
The LM317 is designed to operate from an input voltage supply range between 2.5-V to 40-V greater than the
output voltage. If the device is more than six inches from the input filter capacitors, an input bypass capacitor,
0.1-µF or greater, of any type is needed for stability.
10 Layout
10.1 Layout Guidelines
• It is recommended that the input terminal be bypassed to ground with a bypass-capacitor.
• The optimum placement is closest to the VIN and GND terminals of the device. Care must be taken to
minimize the loop area formed by the bypass-capacitor connection, the VIN terminal, and the GND terminal of
the IC.
• For operation at full rated load, it is recommended to use wide trace lengths to eliminate IR drop and heat
dissipation.
10.2 Layout Example
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