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LM317M — 3-Terminal 0.5A Positive Adjustable Regulator

LM317M Rev. 1.1.0

September 2014

LM317M

3-Terminal 0.5A Positive Adjustable Regulator

Features

• Output Current in Excess of 0.5 A

• 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

Ordering Information

* Refer to below unit orientation figure for TM / TF suffix packing.

Product Number Marking Package Packing Method Operating Temperature

LM317MDTX LM317MDT TO-252 3L (D-PAK) Tape and Reel 0 to +125°CLM317MDTXM LM317MDT TO-252 3L (D-PAK) Tape and Reel

LM317MT LM317M TO-220 3L (Single Gauge) Rail

Description

The LM317M is a 3-terminal adjustable positive voltage

regulator capable of supplying in excess of 500 mA over

an output volt age range of 1.2 V to 37 V. This volt age reg-

ulator is exceptionally easy to use and requires only two

external resistors to set the output voltage.

D-PAK

1. Adj 2. Output 3. Input

TO-220 (Single Gauge)

LM317M — 3-Terminal 0.5A Positive Adjustable Regulator

LM317M Rev. 1.1.0 2

Block Diagram

Figure 1. Block Diagram

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-

ble above the re co mmen ded operating conditions and s tres si ng the parts to these level s i s not recommended. In addi-

tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The

absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted.

Thermal Characteristics

Values are at TA = 25°C unless otherwise noted.

Notes:

1. Thermal resistance test board - size: 76.2 mm x 114.3 mm x 1.6 mm (1S0P),

JEDEC standard: JESD51-3, JESD51-7

2. Assume no ambient airflow

Symbol Parameter Value Unit

VI - VOInput-Output Voltage Differential 40 V

TJOperating Junction Temperature Range 0 to +125 °C

TSTG Storage Temperature Range -65 to +125 °C

Symbol Parameter Value Unit

LM317MT LM317MDTX /

LM317MDTXM(1),(2)

PDPower Dissipation Internally Limited W

RθJC Thermal Resistance, Junction to Case 5 - °C/W

RθJA Thermal Resistance, Junction to Ambient 81 100 °C/W

Rlimit

3Vin

Voltage

Reference

Vadj

Protection

Circuitry

Input

Output

LM317M — 3-Terminal 0.5A Positive Adjustable Regulator

LM317M Rev. 1.1.0 3

Electrical Characteristics

VI - VO = 5 V, IO = 0.1 A, 0°C ≤ TJ ≤ +125°C, PDMAX = 7.5 W, unless otherwise specified.

Notes:

3. Load and Line regulation are specified at constant junction temperature. Change in VO due to heating effects must

be taken into account separately. Pulse testing with low duty cycle is used.

4. CADJ, when used, is connected between the adjustment pin and ground.

Symbol Parameter Conditions Min. Typ. Max. Unit

Rline Line Regulation(3) TA = +25°C, 3 V ≤ VI −VO ≤ 40 V 0.01 0.04 %/ V

3 V ≤ VI −VO ≤ 40 V 0.02 0.07

Rload Load Regulation(3)

TA = +25°C, 10 mA ≤ IO ≤ 0.5 A,

VO ≤ 5 V 525mV

TA = +25°C, 10 mA ≤ IO ≤ 0.5 A,

VO ≥ 5 V 0.1 0.5 %/VO

10 mA ≤ IO ≤ 0.5 A, VO ≤ 5 V 20 70 mV

10 mA ≤ IO ≤ 0.5 A, VO ≥ 5V 0.3 1.5 %/VO

IADJ Adjustment Pin Current - 50 100 μA

ΔIADJ Adjustment Pin Current Chang e 3 V ≤ VI - VO ≤ 40 V,

10 mA ≤ IO ≤ 0.5 A, PD < PDMAX 0.2 5.0 μA

VREF Reference Voltage 3 V < VI - VO < 40 V,

10 mA ≤ IO ≤ 0.5 A, PD < PDMAX 1.20 1.25 1.30 V

STTTemperature Stability TJ = 0°C to +125°C0.7%/V

IL(MIN) Minimum Load Current to

Maintain Regulation VI - VO = 40 V 3.5 10.0 mA

IO(MAX) Maximum Output Current VI - VO ≤ 15 V, PD < PDMAX 0.5 0.9 A

VI - VO = 40 V

PD < PDMAX, TA = +25°C0.15 0.25

eNRMS Noise, % of VOUT TA = +25°C, 10 Hz < f < 10 kHz 0.003 %/VO

RR Ripple Rejection

VO = 10 V, f = 120 Hz,

without CADJ 66 65 dB

VO = 10 V, f = 120 Hz,

CADJ = 10 μF(4) 80

ST Long-Term Stability TJ = +125°C, 1000 Hours 0.3 1 %/

1000Hrs

LM317M — 3-Terminal 0.5A Positive Adjustable Regulator

LM317M Rev. 1.1.0 4

Typical Performance Characteristics

Figure 2. Minimum Load Current Figure 3. Peak Output Current vs. Input-Output

Differential Voltage

Figure 4. Adjustment Pin Current vs. Temperature Figure 5. Ripple Rejection vs. Frequency

Figure 6. Load Regulation vs. Temperature Figure 7. Line Regulation vs. Temperature

LM317M — 3-Terminal 0.5A Positive Adjustable Regulator

LM317M Rev. 1.1.0 5

Typical Performance Characteristics (Continued)

Figure 8. Output Voltage vs. Temperature Figure 9. Thermal Shutdown

LM317M — 3-Terminal 0.5A Positive Adjustable Regulator

LM317M Rev. 1.1.0 6

Typical Application

Figure 10. 15V Electronic Shutdown Regulator(5)

Note:

5. D1 protects the device during an input short circuit.

Figure 11. Slow Turn-On Regulator

LM317M

120

Output

Input

KSP2222

720 TTL CONTROL

1.0uF

1N4002

VADJ

MINIMUM VO = 1.25V

LM317M Output

Input

KSP2907

50K 1N4001

1.0uF

VADJ

240

LM317M — 3-Terminal 0.5A Positive Adjustable Regulator

LM317M Rev. 1.1.0 7

Typical Application (Continued)

Figure 12. Current Regulator

Output

Input R2

IADJ

VADJ

R1 IO

LM317M

IOMAX VREF

-----------------





IADJ 1.25V

-----------------≅+=

IOMAX VREF

R1 R2+

----------------------





=IADJ

+1.25V

R1 R2+

----------------------≅

5mA IO500mA<<

LM317M — 3-Terminal 0.5A Positive Adjustable Regulator

LM317M Rev. 1.1.0 8

Physical Dimensions

Figure 13. 3LEAD, TO-252, JEDEC TO-252 VAR. AB, SURFACE MOUNT (DPAK)

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LM317M — 3-Terminal 0.5A Positive Adjustable Regulator

LM317M Rev. 1.1.0 9

Physical Dimensions (Continued)

Figure 14. TO-220, MOLDED, 3LEAD, JEDEC VARIATION AB

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