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LM317 PDF даташит

Спецификация LM317 изготовлена ​​​​«ON Semiconductor» и имеет функцию, называемую «THREE.TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR».

Детали детали

Номер произв LM317
Описание THREE.TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR
Производители ON Semiconductor
логотип ON Semiconductor логотип 

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LM317 Даташит, Описание, Даташиты
LM317, NCV317
1.5 A Adjustable Output,
Positive Voltage Regulator
The LM317 is an adjustable 3terminal positive voltage regulator
capable of supplying in excess of 1.5 A over an output voltage range of
1.2 V to 37 V. This voltage regulator is exceptionally easy to use and
requires only two external resistors to set the output voltage. Further, it
employs internal current limiting, thermal shutdown and safe area
compensation, making it essentially blowout proof.
The LM317 serves a wide variety of applications including local, on
card regulation. This device can also be used to make a programmable
output regulator, or by connecting a fixed resistor between the
adjustment and output, the LM317 can be used as a precision current
regulator.
Features
Output Current in Excess of 1.5 A
Output Adjustable between 1.2 V and 37 V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting Constant with Temperature
Output Transistor SafeArea Compensation
Floating Operation for High Voltage Applications
Available in Surface Mount D2PAK3, and Standard 3Lead
Transistor Package
NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AECQ100
Qualified and PPAP Capable
Eliminates Stocking many Fixed Voltages
These are PbFree Devices
Vin
Cin*
0.1 mF
LM317
IAdj Adjust
R2
Vout
R1
240
+ CO**
1.0 mF
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12
3
D2PAK3
D2T SUFFIX
CASE 936
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
TO220
T SUFFIX
CASE 221AB
1
2
3
Pin 1. Adjust
2. Vout
3. Vin
Heatsink surface connected to Pin 2.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 10 of this data sheet.
** Cin is required if regulator is located an appreciable distance from power supply filter.
** CO is not needed for stability, however, it does improve transient response.
ǒ ǓVout  +  1.25 V 
1
)
R2
R1
)  IAdj R2
Since IAdj is controlled to less than 100 mA, the error associated with this term is
negligible in most applications.
Figure 1. Standard Application
Semiconductor Components Industries, LLC, 2013
April, 2013 Rev. 13
1
Publication Order Number:
LM317/D









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LM317 Даташит, Описание, Даташиты
LM317, NCV317
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
InputOutput Voltage Differential
VIVO
0.3 to 40
Vdc
Power Dissipation
Case 221A
TA = +25C
Thermal Resistance, JunctiontoAmbient
Thermal Resistance, JunctiontoCase
Case 936 (D2PAK3)
TA = +25C
Thermal Resistance, JunctiontoAmbient
Thermal Resistance, JunctiontoCase
PD Internally Limited W
qJA 65 C/W
qJC 5.0 C/W
PD Internally Limited W
qJA 70 C/W
qJC 5.0 C/W
Operating Junction Temperature Range
TJ
55 to +150
C
Storage Temperature Range
Tstg
65 to +150
C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
ELECTRICAL CHARACTERISTICS
(VIVO = 5.0 V; IO = 0.5 A for D2T and T packages; TJ = Tlow to Thigh (Note 1); Imax and Pmax (Note 2); unless otherwise noted.)
Characteristics
Figure Symbol Min Typ Max Unit
Line Regulation (Note 3), TA = +25C, 3.0 V VIVO 40 V
Load Regulation (Note 3), TA = +25C, 10 mA IO Imax
VO 5.0 V
VO 5.0 V
Thermal Regulation, TA = +25C (Note 4), 20 ms Pulse
Adjustment Pin Current
Adjustment Pin Current Change, 2.5 V VIVO 40 V,
10 mA IL Imax, PD Pmax
Reference Voltage, 3.0 V VIVO 40 V, 10 mA IO Imax, PD Pmax
Line Regulation (Note 3), 3.0 V VIVO 40 V
Load Regulation (Note 3), 10 mA IO Imax
VO 5.0 V
VO 5.0 V
Temperature Stability (Tlow TJ Thigh)
Minimum Load Current to Maintain Regulation (VIVO = 40 V)
Maximum Output Current
VIVO 15 V, PD Pmax, T Package
VIVO = 40 V, PD Pmax, TA = +25C, T Package
RMS Noise, % of VO, TA = +25C, 10 Hz f 10 kHz
Ripple Rejection, VO = 10 V, f = 120 Hz (Note 5)
Without CAdj
CAdj = 10 mF
Thermal Shutdown (Note 6)
LongTerm Stability, TJ = Thigh (Note 7), TA = +25C for
Endpoint Measurements
1 Regline
2 Regload
Regtherm
3 IAdj
1, 2 DIAdj
3 Vref 1.2
1 Regline
2 Regload
3 TS
3 ILmin
3 Imax
1.5
0.15
N
4 RR
66
−−−
3S
0.01
5.0
0.1
0.03
50
0.2
1.25
0.02
20
0.3
0.7
3.5
2.2
0.4
0.003
65
80
180
0.3
0.04 %/V
25 mV
0.5 % VO
0.07 % VO/W
100 mA
5.0 mA
1.3 V
0.07 % V
70 mV
1.5 % VO
% VO
10 mA
A
% VO
dB
C
1.0 %/1.0
kHrs.
Thermal Resistance JunctiontoCase, T Package
RqJC 5.0 C/W
1. Tlow to Thigh = 0to +125C, for LM317T, D2T. Tlow to Thigh = 40to +125C, for LM317BT, BD2T, Tlow to Thigh = 55to +150C, for
NCV317BT, BD2T.
2. Imax = 1.5 A, Pmax = 20 W
3. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
4. Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die.
These effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these
temperature gradients on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.
5. CAdj, when used, is connected between the adjustment pin and ground.
6. Thermal characteristics are not subject to production test.
7. Since LongTerm Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average
stability from lot to lot.
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LM317 Даташит, Описание, Даташиты
310 310
230 120
125 k
12.4 k
135
LM317, NCV317
5.6 k
6.7 k 12 k
5.0 pF
170
160
6.8 k 510
200
Vin
6.3 V
13 k
6.3 V
6.3 V
190
30pF 30pF 2.4 k
3.6 k 5.8 k 110 5.1 k
12.5 k
This device contains 29 active transistors.
Figure 2. Representative Schematic Diagram
105
4.0
0.1
Vout
Adjust
VCC
*
VIH
VIL
Vin
* Pulse testing required.
* 1% Duty Cycle
* is suggested.
Cin 0.1 mF
LM317
Line Regulation (%ńV) 
+
|VOH–VOL|
|VOL|
x 100
Vout
Adjust
IAdj
R1
240
1% CO
+
1.0 mF
R2
1%
Figure 3. Line Regulation and DIAdj/Line Test Circuit
VOH
VOL
RL
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