Document
LM317M, NCV317MA,
NCV317M
Voltage Regulator -
Adjustable Output, Positive
500 mA
The LM317M is an adjustable three−terminal positive voltage regulator capable of supplying in excess of 500 mA 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 blow−out proof.
The LM317M serves a wide variety of applications including local, on−card regulation. This device also makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317M can be used as a precision current regulator.
Features
• Output Current in Excess of 500 mA • Output Adjustable between 1.2 V and 37 V • Internal Thermal Overload Protection • Internal Short Circuit Current Limiting • Output Transistor Safe−Area Compensation • Floating Operation for High Voltage Applications • Eliminates Stocking Many Fixed Voltages • NCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable
• These are Pb−Free Devices
Vin Vin
LM317M
Vout
Vout
* Cin 0.1mF
IAdj Adjust
R1 240
** + CO
1.0mF
R2
* = 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. Simplified Application
© Semiconductor Components Industries, LLC, 2014
October, 2019 − Rev. 26
1
www.onsemi.com Heatsink surface connected to Pin 2
TO−220AB T SUFFIX CASE 221AB
SOT−223 ST SUFFIX CASE 318E
12 3 12 3
DPAK DT SUFFIX CASE 369C
4 12
3
Heatsink Surface (shown as terminal 4 in case outline drawing) is connected to Pin 2.
PIN ASSIGNMENT 1 Adjust 2 Vout 3 Vin
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 11 of this data sheet.
Publication Order Number: LM317M/D
LM317M, NCV317MA, NCV317M
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.) Rating
Symbol
Value
Unit
Input−Output Voltage Differential
VI−VO
40
Vdc
Power Dissipation (Package Limitation) (Note 1) Plastic Package, T Suffix, Case 221A
TA = 25°C Thermal Resistance, Junction−to−Air
Thermal Resistance, Junction−to−Case
Plastic Package, DT Suffix, Case 369C
PD Internally Limited
qJA 70 °C/W qJC 5.0 °C/W
TA = 25°C Thermal Resistance, Junction−to−Air
Thermal Resistance, Junction−to−Case
Plastic Package, ST Suffix, Case 318E
PD Internally Limited qJA 92 °C/W qJC 5.0 °C/W
TA = 25°C Thermal Resistance, Junction−to−Air
Thermal Resistance, Junction−to−Case
PD Internally Limited qJA 245 °C/W qJC 15 °C/W
Maximum Junction Temperature
TJMAX
+150
°C
Storage Temperature Range
Tstg − 65 to +150
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Figure 25 provides thermal resistance versus PC board pad size.
ELECTRICAL CHARACTERISTICS (VI − VO = 5.0 V; IO = 0.1 A, TJ = Tlow to Thigh (Note 2), unless otherwise noted.)
LM317M/LM317MB/NCV317MB
Characteristics
Figure Symbol
Min
Typ
Max Unit
Line Regulation (Note 3) (TA = 25°C, 3.0 V ≤ VI − VO ≤ 40 V)
3 Regline
−
0.01 0.04 %/V
Load Regulation (Note 3) TA = 25°C, 10 mA ≤ IO ≤ 0.5 A VO ≤ 5.0 V VO ≥ 5.0 V
4 Regload
− −
5.0 25 mV 0.1 0.5 % VO
Adjustment Pin Current
5 IAdj
−
50 100 mA
Adjustment Pin Current Change 2.5 V ≤ VI − VO ≤ 40 V, 10 mA ≤ IL ≤ 0.5 A, PD ≤ Pmax
3, 4 DIAdj
−
0.2 5.0 mA
Reference Voltage 3.0 V ≤ VI − VO ≤ 40 V, 10 mA ≤ IL ≤ 0.5 A, PD ≤ Pmax
5 Vref 1.20
1.25
1.30 V
Line Regulation 3.0 V ≤ VI−VO ≤ 40 V (Note 3)
3 Regline
−
0.02 0.07 %/V
Load Regulation 10 mA ≤ IO ≤ 0.5 A (Note 3) VO ≤ 5.0 V VO ≥ 5.0 V
4 Regload
− −
20 70 mV 0.3 1.5 % VO
Temperature Stability (Tlow ≤ TJ ≤ Thigh)
5 TS
−
0.7
− % VO
Minimum Load Current to Maintain Regulation (VI − VO = 40 V)
5 ILmin
−
3.5 10 mA
Maximum Output Current VI − VO ≤ 15 V, PD ≤ Pmax VI − VO = 40 V, PD ≤ Pmax, TA = 25°C
5 Imax
0.5
0.15
0.9 0.25
A − −
RMS Noise, % of VO (TA = 25°C, 10 Hz ≤ f ≤ 10 kHz)
−N
− 0.003 − % VO
Ripple Rejection, VO = 10 V, f = 120 Hz (Note 4) Without CAdj CAdj = 10 mF
6 RR
− 66
65 80
dB − −
Thermal Shut.