LM317MDT - Fairchild Semiconductor

www.fairchildsemi.com

Rev. 1.0.2

Features

• Output Current in Excess of 0.5A

• Output Adjustable Between 1.2V and 37V

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Outp ut Transistor Safe Area Compensation

• Floating Operation fo r High Voltage Applications

Description

The LM317M is a 3-terminal adjustable positive volta ge

regulator capable of supplying in excess of 500mA over an

output voltage range of 1.2V to 37V. This voltage regulator

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

Internal Block Diagram

Rlimit

3Vin

Voltage

Reference

Vad

Protection

Circuitry

Input

Output

LM317M

3-Term inal 0.5A Positive Adjustable Regulator

LM317M

Absolute Maximum Ratings

Electrical Characteristics

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

Note:

1. Thermal resistance test board

Size: 76.2 mm * 114.3mm * 1.6mm(1S0P)

JED E C standar d: JESD51-3, JESD51-7

2. Assume no ambient airflow.

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.

Parameter Symbol Value Unit

Input-Output Voltage Differential VI - VO40 V

Power Dissipation PDInternally Limited W

Thermal Resistance Junction-Air

D-PAK (Note1,2) RθJA 100 °C/W

Operating JunctionTemperature Range Tj0 ~ +125 °C

Storage Temperature Range TSTG -65 ~ +125 °C

Parameter Symbol Conditions Min. Typ. Max. Unit

Line Regulation (Note3) Rline TA = +25°C, 3V ≤ VI −VO ≤ 40V - 0.01 0.04 %/ V

3V ≤ VI −VO ≤ 40V - 0.02 0.07

Load Regulation (Note3) Rload

TA =+25°C, 10mA ≤ IO ≤ 0.5A

VO ≤ 5V

VO ≥ 5V -5

0.1 25

0.5 mV

%/ VO

10mA ≤ IO ≤ 0.5A

VO ≤ 5V

VO ≥ 5V -20

0.3 70

1.5 mV

%/ VO

Adjustment Pin Current IADJ -- 50 100 uA

Adjustment Pin Current Change ∆IADJ 3V ≤ VI - VO ≤ 40V

10mA ≤ IO ≤ 0.5A, PD < PDMAX -0.25 uA

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

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

Temperature Stability STT--0.7- %/ V

Minimum Load Current to

Maintain Regulation IL(MIN) VI - VO = 40V - 3.5 10 mA

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

VI - VO = 40V

PD < PDMAX, TA =+25°C0.15 0.25 - A

RMS Noise, % of VOUT eNTA = +25°C, 10Hz < f < 10KHz - 0.003 - %/ VO

Ripple Rejection RR VO = 10V, f = 120Hz

without CADJ

CADJ = 10uF (Note4) 66 65

80 -dB

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

LM317M

Typical Perfomance Characteristics

Figu re 1. Minimu m Lo ad Cu rrent Figu re 2. Pea k Ou tpu t Cu rrent vs. Inpu t-O u tput

Differential Voltage

Figure 3. Adjustment Pin Current vs. Temperature Figure 4. Ripple Rejection vs. Frequency

Figure 5. Load Re gulation v s. Te mperat ure Figure 6. Line Regulation vs. Temperature

LM317M

Typical Perfomance Characteristics (Continued)

Figure 7. Outputv oltage vs. Temperature Figure 8. Thermal Shutdown

LM317M

Typical Application

Figure 1. 1 5V Electronic Sh utdown Regul ator

D1 protects the device during an input short circuit.

Figu re 2. Slow Tu rn-On Regula to r

Figure 3. Current Regulator

Input Output

LM317M

Input Output

LM317M

Output

LM317M

Input

LM317M

Mechanical Dimensions

Package Dimensions in millimeters

6.60 ±0.20

2.30 ±0.10

0.50 ±0.10

5.34 ±0.30

0.70 ±0.20

0.60 ±0.20

0.80 ±0.20

9.50 ±0.30

6.10 ±0.20

2.70 ±0.20 9.50 ±0.30

6.10 ±0.20

2.70 ±0.20

MIN0.55

0.76 ±0.10 0.50 ±0.10

1.02 ±0.20

2.30 ±0.20

6.60 ±0.20

0.76 ±0.10

(5.34)

(1.50)

(2XR0.25)

(5.04)

0.89 ±0.10

(0.10) (3.05)

(1.00)

(0.90)

(0.70)

0.91 ±0.10

2.30TYP

[2.30±0.20]

2.30TYP

[2.30±0.20]

MAX0.96

(4.34)(0.50) (0.50)

D-PAK

LM317M

Mechanical Dimensions (Continued)

Package Dimensions in millimeters

4.50 ±0.20

9.90 ±0.20

1.52 ±0.10

0.80 ±0.10 2.40 ±0.20

10.00 ±0.20

1.27 ±0.10

ø3.60 ±0.10

(8.70)

2.80 ±0.1015.90 ±0.20

10.08 ±0.30 18.95MAX.

(1.70)

(3.70)(3.00)

(1.46)

(1.00)

(45°)

9.20 ±0.2013.08 ±0.20

1.30 ±0.10

1.30 +0.10

–0.05

0.50 +0.10

–0.05

2.54TYP

[2.54 ±0.20]2.54TYP

[2.54 ±0.20]

TO-220

LM317M

3/14/02 0.0m 001

Stock#DSxxxxxxxx

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reasonably expected to cause the failure of the life support

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Ordering Information

Product Number Package Operating Temperature

LM317MDT D-PAK 0 ~ 125°C

LM317MT TO-220