lm317.pdf

June 2006

LM117/LM317A/LM317

3-Terminal Adjustable Regulator

General Description

The LM117 series of adjustable 3-terminal positive voltage

regulators is capable of supplying in excess of 1.5A over a

1.2V to 37V output range. They are exceptionally easy to

use and require only two external resistors to set the output

voltage. Further, both line and load regulation are better than

standard fixed regulators. Also, the LM117 is packaged in

standard transistor packages which are easily mounted and

handled.

In addition to higher performance than fixed regulators, the

LM117 series offers full overload protection available only in

IC’s. 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 ter-

minal is disconnected.

Normally, no capacitors are needed unless the device is

situated more than 6 inches 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

adjustment terminal can be bypassed to achieve very high

ripple rejection ratios which are difficult to achieve with stan-

dard 3-terminal regulators.

Besides replacing fixed regulators, the LM117 is useful in a

wide variety of other applications. Since the regulator is

“floating” and sees only the input-to-output differential volt-

age, supplies of several hundred volts can be regulated as

long as the maximum input to output differential is not ex-

ceeded, i.e., avoid short-circuiting the output.

Also, it makes an especially simple adjustable switching

regulator, a programmable output regulator, or by connecting

a fixed resistor between the adjustment pin and output, the

LM117 can be used as a precision current regulator. Sup-

plies with electronic shutdown can be achieved by clamping

the adjustment terminal to ground which programs the out-

put to 1.2V where most loads draw little current.

For applications requiring greater output current, see LM150

series (3A) and LM138 series (5A) data sheets. For the

negative complement, see LM137 series data sheet.

Features

n Guaranteed 1% output voltage tolerance (LM317A)

n Guaranteed max. 0.01%/V line regulation (LM317A)

n Guaranteed max. 0.3% load regulation (LM117)

n Guaranteed 1.5A output current

n Adjustable output down to 1.2V

n Current limit constant with temperature

n P + Product Enhancement tested

n 80 dB ripple rejection

n Output is short-circuit protected

Typical Applications

1.2V–25V Adjustable Regulator

LM117/LM317A/LM317 Package Options

Part

Number

Suffix Package

Output

Current

LM117, LM317

TO-3

1.5A

LM317

TO-220

1.5A

LM317

TO-263

1.5A

LM317A, LM317

EMP SOT-223

1.0A

LM117, LM317A, LM317

TO-39

0.5A

LM117

LCC

0.5A

LM317A, LM317

MDT

TO-252

0.5A

00906301

SOT-223 vs. TO-252 (D-Pak)

Packages

Full output current not available at high input-output voltages

*Needed if device is more than 6 inches from filter capacitors.

† Optional — improves transient response. Output capacitors in the range

of 1µF to 1000µF of aluminum or tantalum electrolytic are commonly used

to provide improved output impedance and rejection of transients.

00906354

Scale 1:1

DS009063

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Connection Diagrams

TO-3 (K)

Metal Can Package

TO-39 (H)

Metal Can Package

00906331

CASE IS OUTPUT

00906330

Bottom View

NS Package Number H03A

CASE IS OUTPUT

Bottom View

Steel Package

NS Package Number K02A or K02C

TO-263 (S)

Surface-Mount Package

TO-220 (T)

Plastic Package

00906335

Top View

00906332

Front View

NS Package Number T03B

TO-263 (S)

Surface-Mount Package

Ceramic Leadless

Chip Carrier (E)

00906336

Side View

NS Package Number TS3B

00906334

Top View

NS Package Number E20A

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Connection Diagrams (Continued)

4-Lead SOT-223 (EMP)

TO-252 (MDT)

00906359

Front View

NS Package Number MP04A

00906366

Front View

NS Package Number TD03B

Ordering Information

Package

Temperature

Range

Output

Current

Order

Number

Package

Marking

Transport

Media

NSC

Drawing

TO-3

Metal

Can (K)

−55˚C

≤

T J

≤

+150˚C

1.5A

LM117K STEEL

LM117K STEEL P+

50 Per Bag

K02A

0˚C

≤

T J ≤

+125˚C

1.5A

LM317K STEEL

LM317K STEEL P+

50 Per Bag

−55˚C

≤

T J ≤

+150˚C

1.5A

LM117K/883

50 Per Bag

K02C

TO-220

3- Lead

−40˚C

≤

T J ≤

+125˚C

1.5A

LM317AT

LM317AT P+

45 Units/Rail

T03B

0˚C ≤ T J ≤ +125˚C

1.5A

LM317T

LM317T P+

45 Units/Rail

TO-263

3- Lead

0˚C

≤

T J ≤

+125˚C

1.5A

LM317S

LM317S P+

45 Units/Rail

TS3B

LM317SX

500 Units Tape and Reel

0˚C ≤ T J ≤ +125˚C

1.0A

LM317EMP

N01A

1k Units Tape and Reel

SOT-223

4- Lead

LM317EMPX

2k Units Tape and Reel

MP04A

LM317AEMP

1k Units Tape and Reel

−40˚C

≤

T J ≤

+125˚C

1.0A

N07A

LM317AEMPX

2k Units Tape and Reel

−55˚C ≤ T J ≤ +150˚C

0.5A

LM117H

LM117H P+

500 Per Box

TO-39

Metal

Can (H)

−55˚C

≤

T J

≤

+150˚C

0.5A

LM117H/883

20 Per Tray

H03A

−40˚C

≤

T J ≤

+125˚C

0.5A

LM317AH

LM317AH P+

500 Per Box

0˚C

≤

T J ≤

+125˚C

0.5A

LM317H

LM317H P+

500 Per Box

LCC

−55˚C

≤

T J ≤

+150˚C

0.5A

LM117E/883

50 Units/Rail

E20A

TO-252

3- Lead

D-Pack

0˚C

≤

T J ≤

+125˚C

0.5A

LM317MDT

75 Units/Rail

LM317MDTX

2.5k Units Tape and Reel

TD03B

LM317AMDT

75 Units/Rail

−40˚C ≤ T J ≤ +125˚C

0.5A

LM317AMDT

LM317AMDTX

2.5k Units Tape and Reel

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Power Dissipation

ESD Tolerance (Note 5)

3 kV

Operating Temperature Range

Internally Limited

LM117

−55˚C

≤

T J

≤

+150˚C

LM317A

−40˚C

≤

T J ≤

+125˚C

Input-Output Voltage Differential

+40V, −0.3V

LM317

0˚C

≤

T J ≤

+125˚C

Storage Temperature

−65˚C to +150˚C

Lead Temperature

Metal Package (Soldering, 10 seconds)

300˚C

Preconditioning

Thermal Limit Burn-In

Plastic Package (Soldering, 4 seconds)

260˚C

All Devices 100%

LM117 Electrical Characteristics (Note 3)

Specifications with standard type face are for T J = 25˚C, and those with boldface type apply over full Operating Tempera-

ture Range . Unless otherwise specified, V IN −V OUT = 5V, and I OUT =10mA.

Parameter

Conditions

LM117 (Note 2)

Min

Typ

Max

Units

Reference Voltage

≤

(V IN −V OUT )

≤

40V,

1.20

1.25

1.30

10 mA

≤

I OUT ≤

I MAX

Line Regulation

3V ≤ (V IN −V OUT ) ≤ 40V (Note 4)

0.01

0.02

0.05

%/V

Load Regulation

10 mA ≤ I OUT ≤ I MAX (Note 4)

0.1

0.3

Thermal Regulation

20 ms Pulse

0.03

0.07

%/W

Adjustment Pin Current

100

µA

Adjustment Pin Current Change

10 mA

≤

I OUT ≤

I MAX

0.2

µA

≤

(V IN −V OUT )

≤

40V

Temperature Stability

T MIN ≤

T J ≤

T MAX

Minimum Load Current

(V IN −V OUT ) = 40V

3.5

(V IN −V OUT ) ≤ 15V

K Package

H, E Package

1.5

0.5

2.2

0.8

3.4

1.8

Current Limit

(V IN −V OUT ) = 40V

K Package

H, E Package

0.3

0.15

0.4

0.20

RMS Output Noise, % of V OUT

10 Hz

≤

10 kHz

0.003

V OUT = 10V, f = 120 Hz,

C ADJ =0µF

Ripple Rejection Ratio

V OUT = 10V, f = 120 Hz,

C ADJ =10µF

Long-Term Stability

T J = 125˚C, 1000 hrs

0.3

Thermal Resistance,

θ JC

K (TO-3) Package

H (TO-39) Package

E (LCC) Package

˚C/W

Junction-to-Case

Thermal Resistance,

θ JA

K (TO-3) Package

H (TO-39) Package

E (LCC) Package

186

Junction-to-Ambient

(No Heat Sink)

˚C/W

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LM317A and LM317 Electrical Characteristics (Note 3)

Specifications with standard type face are for T J = 25˚C, and those with boldface type apply over full Operating Tempera-

ture Range . Unless otherwise specified, V IN −V OUT = 5V, and I OUT =10mA.

Parameter

Conditions

LM317A

LM317

Min

Typ

Max

Min

Typ

Max Units

1.238 1.250 1.262

1.25

Reference Voltage

3V ≤ (V IN −V OUT ) ≤ 40V,

10 mA ≤ I OUT ≤ I MAX

1.225 1.250 1.270 1.20

1.25

1.30

Line Regulation

≤

(V IN −V OUT )

≤

40V (Note 4)

0.005

0.01

0.02

0.01

0.02

0.04

0.07

%/V

Load Regulation

10 mA

≤

I OUT ≤

I MAX (Note 4)

0.1

0.3

0.5

0.1

0.3

0.5

1.5

Thermal Regulation

20 ms Pulse

0.04

0.07

0.04

0.07 %/W

Adjustment Pin Current

100

µA

Adjustment Pin Current Change

10 mA

≤

I OUT ≤

I MAX

0.2

µA

≤

(V IN −V OUT )

≤

40V

Temperature Stability

T MIN ≤ T J ≤ T MAX

Minimum Load Current

(V IN −V OUT ) = 40V

3.5

15V

K, T, S Packages

EMP Package

H, MDT Packages

≤

1.0

0.5

1.5

0.8

2.6

1.8

1.5

1.0

0.5

2.2

1.5

0.8

3.4

2.6

1.8

Current Limit

(V IN −V OUT ) = 40V

K, T, S Packages

EMP Package

H, MDT Packages

0.112

0.075

0.30

0.20

0.15

0.112

0.075

0.40

0.30

0.20

RMS Output Noise, % of V OUT

10 Hz ≤ f ≤ 10 kHz

0.003

V OUT = 10V, f = 120 Hz,

C ADJ =0µF

Ripple Rejection Ratio

V OUT = 10V, f = 120 Hz,

C ADJ =10µF

Long-Term Stability

T J = 125˚C, 1000 hrs

0.3

Thermal Resistance,

θ JC

K (TO-3) Package

T (TO-220) Package

S (TO-263) Package

EMP (SOT-223) Package

H (TO-39) Package

MDT (TO-252) Package

23.5

˚C/W

Junction-to-Case

Thermal Resistance,

θ JA

K (TO-3) Package

T (TO-220) Package

S (TO-263) Package (Note 6)

EMP (SOT-223) Package (Note 6)

H (TO-39) Package

MDT (TO-252) Package (Note 6)

140

186

103

140

186

103

Junction-to-Ambient

(No Heat Sink)

˚C/W

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is

intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The

guaranteed specifications apply only for the test conditions listed.

Note 2: Refer to RETS117H drawing for the LM117H, or the RETS117K for the LM117K military specifications.

Note 3: I MAX = 1.5A for the K (TO-3), T (TO-220), and S (TO-263) packages. I MAX = 1.0A for the EMP (SOT-223) package. I MAX = 0.5A for the H (TO-39), MDT

(TO-252), and E (LCC) packages. Device power dissipation (P D ) is limited by ambient temperature (T A ), device maximum junction temperature (T J ), and package

thermal resistance (

JA ). The maximum allowable power dissipation at any temperature is : P D(MAX) = ((T J(MAX) -T A )/

JA ). All Min. and Max. limits are guaranteed

to National’s Average Outgoing Quality Level (AOQL).

Note 4: Regulation is measured at a constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are

covered under the specifications for thermal regulation.

Note 5: Human body model, 100 pF discharged through a 1.5 k

resistor.

Note 6: When surface mount packages are used (TO-263, SOT-223, TO-252), the junction to ambient thermal resistance can be reduced by increasing the PC

board copper area that is thermally connected to the package. See the Applications Hints section for heatsink techniques.

Ω

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(V IN −V OUT )

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