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LM317 PDF даташит

Спецификация LM317 изготовлена ​​​​«Estek Electronics» и имеет функцию, называемую «3-terminal positive voltage regulators».

Детали детали

Номер произв LM317
Описание 3-terminal positive voltage regulators
Производители Estek Electronics
логотип Estek Electronics логотип 

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LM317 Даташит, Описание, Даташиты
Description
The 3 1 7 are adjustable 3 - terminal positive -voltage regulators capable of supplying 1.5A over a differential voltage range of 3Vto
40V. They are exceptionally easy to use and require only two external resistors to set the output voltage.
Both input and output regulation are better than standard fixed regulators.In addition to higher performance than fixed regulators,
these regulators offer full overload protection available only in integrated circuits. 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 terminal is disconnected. Normally, no capacitors are needed unless the device is situated far from
the input filter capacitors in which case an input bypass is needed. An optional output capacitor can be added to improve transient
response.The primary applications of each of these regulators is that of a programmable output regulator, but by
connecting a fixed resistor between adjustment terminal and the output terminal, each device can be used as a
precision current regulator. Even though the regulator is floating and sees only the input-to-output differential voltage,
www.DautasSeheoef t4thUe.cseomdevices to regulate output voltages that would cause the maximum-rated differential voltage to be exceeded if
the output became shorted to ground is not recommended.
Features
•Output Voltage Range Adjustable from 1.2 V to 37 V
• Output Current Capability of 1.5 A Max
• Input Regulation Typically 0.01 % Per Input - Volt Change
• Output Regulation Typically 0.1 %
• Peak Output Current Constant Over Temperature
Range of Regulator
• Popular 3-Lead TO-220 Package
• Ripple Rejection Typically 80 dB
Typical application data
V
I
3 IN
317
ADJ
OUT
2
R1
1 240
V
0
(see Note C)
C1 = 0.1 Fµ
(see Note A)
C2 = 1
(see Note B)
R2
Note A: Use of an input bypass capacitor is recommended if regulator is far from filter capacitors.
Note B: Use of an output capacitor improves transient response but is optional.
Note C: Output voltage is calculated from the equation:
0 = Vref V
R
+1R1
Vref equals the difference between the output and adjustment terminal
BEIJING ESTEK ELECTRONICS CO.,LTD
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LM317 Даташит, Описание, Даташиты
Absolute Maximum Ratings
OVER OPERATING TEMPERATURE RANGE (UNLESS OTHERWISE NOTED)
Parameter
Maximum
Units
Input-to-output differential voltage, VI - Vo
Continuous total dissipation at 25 °C free-air temperature
Continuous total dissipation at (or below) 25 °C case temperature
Operating free-air, case, or virtual junction temperature range
Storage temperature range
40
2
15
0 to 125
-65 to 150
V
W
W
°C
°C
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Recommended Operating Conditions
Parameter
Output current, I0
Operating virtual junction temperature, TJ
LM 317
min max
10 1500
0 125
Units
mA
°C
Electrical Characteristics
Electrical Characteristics over recommended ranges of operating virtual junction temperature (unless other wise noted) (Note 1)
Parameter
Test Conditions*
317 Units
Min Typ Max
Input regulation (Note 2)
VI-V0=3 V to 40 V,
(Note 3)
TJ = MIN to MAX
l0 = 10 mA to 1.5 A
0.01 0.04 %/ V
0.02 0.07
Ripple rejection
Vo=10 V, f=120 Hz
65 dB
Vo=10 V, f=120 Hz
10-µF capacitor between ADJ and ground
66 80
Output regulation
Output voltage change with temperature
lo = 10 mA to 1.5 A,
TJ= 25 °C, (See Note 3)
lo = 10 mA to 1.5 A,
(Note 3)
TJ = MIN to MAX
Vo 5 V
Vo > 5 V
Vo 5 V
Vo > 5 V
5 25 mV
0.1 0.5 %
20 70 mV
0.3 1.5 %
1%
Output voltage long-term drift (Note 4)
Output noise voltage
Minimum output current to maintain regulation
Peak output current
Adjustment-terminal current
Change in adjustment-terminal current
Reference voltage (output to ADJ )
After 1000 h at TJ = MAX and VI-Vo =40 V
f= 10 Hz to 10 kHz, TJ =25°C
VI-Vo = 40 V
VI-Vo 15 V
VI-Vo 40 V, TJ =25°C
VI-Vo=2.5 V to 40 V,
lo = 10 mA to 1.5 A
VI-Vo = 3 V to 40 V, lo=10 mA to 1.5 A,
P 15W
0.3 1 %
0.003
%
3.5 10 mA
1.5 2.2
A
0.15 0.4
50 100 µA
0.2 5.0 µA
1.2 1.25 1.3 V
BEIJING ESTEK ELECTRONICS CO.,LTD
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LM317 Даташит, Описание, Даташиты
* Unless otherwise noted, these specifications apply for the following test conditions: VI - V0 = 5V and I0 = 0.5 A. For conditions shown
as MIN or MAX, use the appropriate value specified under recommended operating conditions.
Note 1: All characteristics are measured with a 0.1 - µF capacitor across the input and a 1 - µF capacitor across the output.
Note 2: Input regulation is expressed here as the percentage change in output voltage per 1 - V change at the input.
Note 3: Pulse testing techniques are used to maintain the junction temperature as close to the ambient tempe rature as possible.
Thermal effects must be taken into account separately.
Note 4: Since long-term drift cannot be measured on the individual devices prior to shipment, this specification is not intended to be a
guarantee or warranty. It is an engineering estimate of the average drift to be expected from lot to lot.
Ordering Information
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O RDERING NU MB ER
LM317
P ACK AGE
TO - 220
M AR KING
LM317
Address :
6A06--6A07
Rm 6A07,Changyin Office Building ,No.88,Yong Ding Road,Hai Dian District ,Beijing
Postalcode:100039
Tel: 86-010-58895780 / 81 / 82 / 83 / 84 Fax : 010-58895793
Http://www.estek.com.cn
REV No:01-060808
BEIJING ESTEK ELECTRONICS CO.,LTD
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