Adjustable Regulator. LM317 Datasheet

LM317 Regulator. Datasheet pdf. Equivalent

LM317 Datasheet
Recommendation LM317 Datasheet
Part LM317
Description 3-Terminal Adjustable Regulator
Feature LM317; LM117/LM317A/LM317 3-Terminal Adjustable Regulator April 2007 LM117/LM317A/LM317 3-Terminal Adjust.
Manufacture National Semiconductor
Datasheet
Download LM317 Datasheet




National Semiconductor LM317
April 2007
LM117/LM317A/LM317
3-Terminal Adjustable Regulator
General Description
The LM117 series of adjustable 3-terminal positive voltage
regulators is capable of supplying 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 volt-
age. Further, both line and load regulation are better than
standard fixed regulators. Also, the LM117 is packaged in
standard transistor packages which are easily mounted and
handled.
In addition to higher performance than fixed regulators, the
LM117 series offers full overload protection available only in
IC's. Included on the chip are current limit, thermal overload
protection and safe area protection. All overload protection
circuitry remains fully functional even if the adjustment termi-
nal is disconnected.
Normally, no capacitors are needed unless the device is sit-
uated more than 6 inches from the input filter capacitors in
which case an input bypass is needed. An optional output ca-
pacitor can be added to improve transient response. The
adjustment terminal can be bypassed to achieve very high
ripple rejection ratios which are difficult to achieve with stan-
dard 3-terminal regulators.
Besides replacing fixed regulators, the LM117 is useful in a
wide variety of other applications. Since the regulator is “float-
ing” and sees only the input-to-output differential voltage,
supplies of several hundred volts can be regulated as long as
the maximum input to output differential is not exceeded, i.e.,
avoid short-circuiting the output.
Also, it makes an especially simple adjustable switching reg-
ulator, a programmable output regulator, or by connecting a
fixed resistor between the adjustment pin and output, the
LM117 can be used as a precision current regulator. Supplies
with electronic shutdown can be achieved by clamping the
adjustment terminal to ground which programs the output to
1.2V where most loads draw little current.
For applications requiring greater output current, see LM150
series (3A) and LM138 series (5A) data sheets. For the neg-
ative complement, see LM137 series data sheet.
Features
Guaranteed 1% output voltage tolerance (LM317A)
Guaranteed max. 0.01%/V line regulation (LM317A)
Guaranteed max. 0.3% load regulation (LM117)
Guaranteed 1.5A output current
Adjustable output down to 1.2V
Current limit constant with temperature
P+ Product Enhancement tested
80 dB ripple rejection
Output is short-circuit protected
Typical Applications
1.2V–25V Adjustable Regulator
LM117/LM317A/LM317 Package Options
Part
Number
Suffix
Package
Output
Current
LM117, LM317
K
TO-3
1.5A
LM317
T TO-220 1.5A
LM317
S TO-263 1.5A
LM317A, LM317
EMP SOT-223 1.0A
LM117, LM317A, LM317 H
TO-39 0.5A
LM117
E
LCC
0.5A
LM317A, LM317
MDT TO-252 0.5A
906301
Full output current not available at high input-output voltages
*Needed if device is more than 6 inches from filter capacitors.
†Optional—improves transient response. Output capacitors in the range
of 1μF to 1000μF of aluminum or tantalum electrolytic are commonly used
to provide improved output impedance and rejection of transients.
SOT-223 vs. TO-252 (D-Pak)
Packages
Scale 1:1
906354
© 2007 National Semiconductor Corporation 9063
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National Semiconductor LM317
Connection Diagrams
TO-3 (K)
Metal Can Package
TO-39 (H)
Metal Can Package
906330
CASE IS OUTPUT
Bottom View
Steel Package
NS Package Number K02A or K02C
TO-263 (S)
Surface-Mount Package
CASE IS OUTPUT
906331
Bottom View
NS Package Number H03A
TO-220 (T)
Plastic Package
Top View
906335
TO-263 (S)
Surface-Mount Package
906336
Side View
NS Package Number TS3B
906332
Front View
NS Package Number T03B
Ceramic Leadless
Chip Carrier (E)
Top View
906334
NS Package Number E20A
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National Semiconductor LM317
4-Lead SOT-223 (EMP)
TO-252 (MDT)
906359
Front View
NS Package Number MP04A
Ordering Information
Front View
906366
NS Package Number TD03B
Package
TO-3
Metal Can
(K)
TO-220
3- Lead
TO-263
3- Lead
Temperature
Range
−55°C TJ +150°C
0°C TJ +125°C
−55°C TJ +150°C
−40°C TJ +125°C
0°C TJ +125°C
0°C TJ +125°C
Output
Current
1.5A
1.5A
1.5A
1.5A
1.5A
1.5A
SOT-223
4- Lead
0°C TJ +125°C
−40°C TJ +125°C
TO-39
Metal Can
(H)
LCC
−55°C TJ +150°C
−55°C TJ +150°C
−40°C TJ +125°C
0°C TJ +125°C
−55°C TJ +150°C
TO-252
3- Lead
D-Pack
0°C TJ +125°C
−40°C TJ +125°C
1.0A
1.0A
0.5A
0.5A
0.5A
0.5A
0.5A
0.5A
0.5A
Order
Number
LM117K STEEL
LM317K STEEL
LM117K/883
LM317AT
LM317T
LM317S
LM317SX
LM317EMP
LM317EMPX
LM317AEMP
LM317AEMPX
LM117H
LM117H/883
LM317AH
LM317H
LM117E/883
LM317MDT
LM317MDTX
LM317AMDT
LM317AMDTX
Package
Marking
LM117K STEEL P+
LM317K STEEL P+
LM117K/883
LM317AT P+
LM317T P+
LM317S P+
N01A
N07A
LM117H P+
LM117H/883
LM317AH P+
LM317H P+
LM117E/883
LM317MDT
LM317AMDT
Transport
Media
50 Per Bag
50 Per Bag
50 Per Bag
45 Units/Rail
45 Units/Rail
45 Units/Rail
500 Units Tape and Reel
1k Units Tape and Reel
2k Units Tape and Reel
1k Units Tape and Reel
2k Units Tape and Reel
500 Per Box
20 Per Tray
500 Per Box
500 Per Box
50 Units/Rail
75 Units/Rail
2.5k Units Tape and Reel
75 Units/Rail
2.5k Units Tape and Reel
NSC
Drawing
K02A
K02C
T03B
TS3B
MP04A
H03A
E20A
TD03B
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