Adjustable Regulator. LM317 Datasheet

LM317 Regulator. Datasheet pdf. Equivalent


Part LM317
Description 3-Terminal 1.5A Adjustable Regulator
Feature LM317 3-Terminal 1.5A Adjustable Regulator DESCRIPTION LM317 series of adjustable 3-terminal positiv.
Manufacture AP Semiconductor
Datasheet
Download LM317 Datasheet


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LM317
LM317
3-Terminal 1.5A Adjustable Regulator
DESCRIPTION
LM317 series of adjustable 3-terminal positive voltage regulators is capable of
supply in excess of 1.5A over a 1.2V to 37V output range. They are exceptionally
easy to use, and require only two external resistors to set the output voltage.
Further, both line and load regulation are better than standard fixed regulators.
FEATURES
Output current in excess of 1.5A
Pb-Free Packages are available
Internal Thermal shutdown and SOA protection
Output voltage offered in 4% Tolerance
High ESD Level (HBM>8000V, MM>800V)
TYPICAL APPLICATION
The input voltage must remain typically
2.0V above the output voltage even during
the low point on the ripple voltage.
* CI is required if regulator is located
an appreciable Distance from power filter.
* CO improves transient response.
Values of ≤ 0.1 µF could cause instability.
REV. 02
1



LM317
LM317
Maximum Ratings (TA=25 °C, unless otherwise noted)
Rating
Symbol
Value
Unit
Input-Output Voltage Differential
VIN - VO
40
V
Power Dissipation
Storage Junction Temperature
Operating Junction Temperature
PD
TSTG
TJ
Internally Limited
-55 ~ 150
-30 ~ 125
W
°C
°C
Temperature Coefficient of Output Voltage ΔVO / ΔT
± 0.02
% / °C
Stresses exceeding Maximum ratings may damage the device. Maximum ratings are stress ratings.
Functional operation above the recommended operating conditions is not implied.
Extended exposure to stresses the above the recommended operating conditions may affect
device reliability.
Representative Schematic of LM317
R5 R6
R7
R22 VIN
R8 R11
D2
Q37 Q41
Q10
Q9
Q11
Q12
Q13 Q14 Q15
Q35 R17
Q40
Q1
R1 Q6
Q2 Q3
Q7
Q20
Q21
Q8 Q18
Q19
R18
C2
Q43
R21
R20
Q22
SENSE
Q4
Q5
R3
C1
R2 R4
R12
R19
RT5 RT4 RT3 RT2 RT1
Q34 QP1
R23
R24 R25
VOUT
ADJ_GND
REV. 02
2







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