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LM117 の電気的特性と機能

LM117のメーカーはNational Semiconductorです、この部品の機能は「3-Terminal Adjustable Regulator」です。


製品の詳細 ( Datasheet PDF )

部品番号 LM117
部品説明 3-Terminal Adjustable Regulator
メーカ National Semiconductor
ロゴ National Semiconductor ロゴ 




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LM117 Datasheet, LM117 PDF,ピン配置, 機能
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
www.national.com

1 Page





LM117 pdf, ピン配列
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
3 www.national.com


3Pages


LM117 電子部品, 半導体
Typical Performance Characteristics Output Capacitor = 0 μF unless otherwise noted
Load Regulation
Current Limit
Adjustment Current
906337
Dropout Voltage
906338
Temperature Stability
906339
Minimum Operating Current
906340
www.national.com
906341
6
906342

6 Page



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