LM317L

SEMICONDUCTOR

TECHNICAL DATA

LOW CURRENT

THREETERMINAL

ADJUSTABLE POSITIVE

VOLTAGE REGULATOR

ORDERING INFORMATION

Order this document by LM317L/D

Z SUFFIX

PLASTIC PACKAGE

CASE 29

Pin 1. Adjust

2. Vout

3. Vin

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SOP8*)

Pin 1. Vin

2. Vout

3. Vout

4. Adjust
5. N.C.
6. Vout

7. Vout

8. N.C.

* SOP8 is an internally modified SO8 pack-

age. Pins 2, 3, 6 and 7 are electrically common
to the die attach flag. This internal lead frame
modification decreases package thermal resis-
tance and increases power dissipation capabili-
ty when appropriately mounted on a printed cir-
cuit board. SOP8 conforms to all external di-
mensions of the standard SO8 package.

Operating

Temperature Range

Device

Package

LM317LD

LM317LZ

LM317LBZ

SOP8

Plastic

TJ = 40

to +125

TJ = 0

to +125

LM317LBD

SOP8

LM317L

SEMICONDUCTOR

TECHNICAL DATA

LOW CURRENT

THREETERMINAL

ADJUSTABLE POSITIVE

VOLTAGE REGULATOR

ORDERING INFORMATION

Order this document by LM317L/D

Z SUFFIX

PLASTIC PACKAGE

CASE 29

Pin 1. Adjust

2. Vout

3. Vin

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SOP8*)

Pin 1. Vin

2. Vout

3. Vout

4. Adjust
5. N.C.
6. Vout

7. Vout

8. N.C.

* SOP8 is an internally modified SO8 pack-

Operating

Temperature Range

Device

Package

LM317LD

LM317LZ

LM317LBZ

SOP8

Plastic

TJ = 40

to +125

TJ = 0

to +125

LM317LBD

SOP8

MOTOROLA ANALOG IC DEVICE DATA

Three-Terminal Adjustable

Output Positive Voltage

Regulator

The LM317L is an adjustable 3terminal positive voltage regulator

capable of supplying in excess of 100 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 them essentially blowout proof.

The LM317L 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 LM317L can be used as a precision current regulator.

Output Current in Excess of 100 mA

Output Adjustable Between 1.2 V and 37 V

Internal Thermal Overload Protection

Internal Short Circuit Current Limiting

Output Transistor SafeArea Compensation

Floating Operation for High Voltage Applications

Standard 3Lead Transistor Package

Eliminates Stocking Many Fixed Voltages

Simplified Application

* 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.

Since IAdj is controlled to less than 100

A, the error

associated with this term is negligible in most applications.

LM317L

Vin

Vout

240

Adjust

IAdj

Cin*

0.1

+ CO**

1.0

Vout

1.25 V 1

)

R2
R1

)

IAdj R2

Motorola, Inc. 1996

Rev 1

LM317L

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

InputOutput Voltage Differential

VIVO

Vdc

Power Dissipation

Internally Limited

Operating Junction Temperature Range

40 to +125

Storage Temperature Range

Tstg

65 to +150

ELECTRICAL CHARACTERISTICS

(VIVO = 5.0 V; IO = 40 mA; TJ = Tlow to Thigh [Note 1]; Imax and Pmax [Note 2];

unless otherwise noted.)

LM317L, LB

Characteristics

Figure

Symbol

Min

Typ

Max

Unit

Line Regulation (Note 3)

TA = 25

C, 3.0 V

VI VO

40 V

Regline

0.01

0.04

%/V

Load Regulation (Note 3), TA = 25

10 mA

Imax LM317L

5.0 V

Regload

5.0
0.1

0.5

% VO

Adjustment Pin Current

IAdj

100

Adjustment Pin Current Change

2.5 V

VI VO

40 V, PD

Pmax

10 mA

Imax LM317L

1, 2

IAdj

0.2

5.0

Reference Voltage

3.0 V

VI VO

40 V, PD

Pmax

10 mA

Imax LM317L

Vref

1.20

1.25

1.30

Line Regulation (Note 3)

3.0 V

VI VO

40 V

Regline

0.02

0.07

%/V

Load Regulation (Note 3)

10 mA

Imax LM317L

5.0 V

Regload

0.3

1.5

% VO

Temperature Stability (Tlow

Thigh)

0.7

% VO

Minimum Load Current to Maintain Regulation (VI VO = 40 V)

ILmin

3.5

Maximum Output Current

VI VO

6.25 V, PD

Pmax, Z Package

VI VO

40 V, PD

Pmax, TA = 25

C, Z Package

Imax

100

200

RMS Noise, % of VO

TA = 25

C, 10 Hz

10 kHz

0.003

% VO

Ripple Rejection (Note 4)

VO = 1.2 V, f = 120 Hz
CAdj = 10

F, VO = 10.0 V

80
80

Long Term Stability, TJ = Thigh (Note 5)

TA = 25

C for Endpoint Measurements

0.3

1.0

%/1.0 k

Hrs.

Thermal Resistance, JunctiontoCase

Z Package

C/W

Thermal Resistance, JunctiontoAir

Z Package

160

C/W

NOTES: 1. Tlow to Thigh = 0

to +125

C for LM317L

to +125

C for LM317LB

2. Imax = 100 mA

Pmax = 625 mW

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

5. Since LongTerm Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability

from lot to lot.

LM317L

MOTOROLA ANALOG IC DEVICE DATA

* Pulse Testing Required:

1% Duty Cycle is suggested.

Load Regulation (mV) = VO (min Load) VO (max Load)

Load Regulation (% VO) =

VO (min Load) VO (max Load)

X
100

VO (min Load)

VO (max Load)

LM317L

Cin

0.1

Adjust

R2
1%

1.0

(max Load)

RL
(min Load)

Vout

240
1%

Vin*

Vin

IAdj

Figure 2. Load Regulation and

IAdj/Load Test Circuit

VO (min Load)

Pulse Testing Required:
1% Duty Cycle is suggested.

LM317L

Vin

Vout

Adjust

240
1%

Cin

To Calculate R2:

Vout = ISET R2 + 1.250 V

Assume ISET = 5.25 mA

IAdj

ISET

Vref

0.1

Figure 3. Standard Test Circuit

LM317L

Vin

Vout

Vout = 1.25 V

Cin

0.1

Adjust

240
1%

D1 *
1N4002

14.30V

4.30V

1.65K
1%

* D1 Discharges CAdj if Output is Shorted to Ground.

f = 120 Hz

**CAdj provides an AC ground to the adjust pin.

Figure 4. Ripple Rejection Test Circuit

LM317L

MOTOROLA ANALOG IC DEVICE DATA

I B

, QUIESCENT

CURRENT

(mA)

out

, INPUTOUTPUT

VOL

T
AGE

DIFFERENTIAL

(V)

I O

, OUTPUT

CURRENT

(A)

Figure 5. Load Regulation

Figure 6. Ripple Rejection

Figure 7. Current Limit

Figure 8. Dropout Voltage

Figure 9. Minimum Operating Current

Figure 10. Ripple Rejection versus Frequency

0.4

0.2

0.4

0.6

0.8

1.0

100

125

150

out

TJ, JUNCTION TEMPERATURE (

,
OUTPUT

VOL

T
AGE CHANGE (%)

Vin = 45 V

Vout = 5.0 V

IL = 5.0 mA to 40 mA

Vin = 10 V

Vout = 5.0 V

IL = 5.0 mA to 100 mA

RR, RIPPLE REJECTION (dB)

100

125

150

TJ, JUNCTION TEMPERATURE (

IL = 40 mA

f = 120 Hz
Vout = 10 V

Vin = 14 V to 24 V

100

125

150

TJ, JUNCTION TEMPERATURE (

2.5

2.0

1.5

1.0

0.5

IL = 5.0 mA

IL = 100 mA

0.50

0.40

0.30

0.20

0.10

VinVout, INPUTOUTPUT VOLTAGE DIFFERENTIAL (V)

TJ = 25

TJ = 150

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

VinVout, INPUTOUTPUT VOLTAGE DIFFERENTIAL (V)

TJ = 55

TJ = 25

TJ = 150

100

1.0 k

10 k

100 k

1.0 M

f, FREQUENCY (Hz)

RR, RIPPLE REJECTION (dB)

IL = 40 mA

Vin = 5.0 V

1.0 VPP

Vout = 1.25 V

LM317L

MOTOROLA ANALOG IC DEVICE DATA

out

, OUTPUT

VOL

T
AGE

DEVIA

TION (V)

out

, OUTPUT

VOL

T
AGE

DEVIA

TION (V)

, INPUT

VOL

T
AGE

CHANGE (V)

NOISE VOL

T
AGE

(

)

out

,
OUTPUT

VOL

T
AGE CHANGE (%)

I Adj

,
ADJUSTMENT

PIN CURRENT

(

)

CL = 0.3

F; CAdj = 10

Figure 11. Temperature Stability

Figure 12. Adjustment Pin Current

Figure 13. Line Regulation

Figure 14. Output Noise

Figure 15. Line Transient Response

Figure 16. Load Transient Response

1.5

1.0

0.5

1.0

1.5

1.0

0.5

t, TIME (

CL = 1

CL = 0

Vin

Vout = 1.25 V

IL = 20 mA

TJ = 25

0.3

0.2

0.1

0.2

100

t, TIME (

CURRENT

(mA)

, LOAD

CL = 1

F; CAdj = 10

Vin = 15 V

Vout = 10 V

INL = 50 mA

TJ = 25

100

125

150

TJ, JUNCTION TEMPERATURE (

1.260

1.250

1.240

1.230

1.220

ref

,
REFERENCE VOL

T
AGE (V)

Vin = 4.2 V

Vout = Vref

IL = 5.0 mA

100

125

150

TJ, JUNCTION TEMPERATURE (

Vin = 6.25 V

Vout = Vref

IL = 10 mA

IL = 100 mA

100

125

150

TJ, JUNCTION TEMPERATURE (

0.4

0.2

0.4

0.6

0.8

1.0

Vin = 4.25 V to 41.25 V

Vout = Vref

IL = 5 mA

100

125

150

TJ, JUNCTION TEMPERATURE (

8.0

6.0

4.0

Bandwidth 100 Hz to 10 kHz

0.3

LM317L

MOTOROLA ANALOG IC DEVICE DATA

APPLICATIONS INFORMATION

Basic Circuit Operation

The LM317L is a 3terminal floating regulator. In

operation, the LM317L develops and maintains a nominal
1.25 V reference (Vref) between its output and adjustment
terminals. This reference voltage is converted to a
programming current (IPROG) by R1 (see Figure 13), and this
constant current flows through R2 to ground. The regulated
output voltage is given by:

Vout = Vref (1 +

) + IAdj R2

R2
R1

Since the current from the adjustment terminal (IAdj)

represents an error term in the equation, the LM317L was
designed to control IAdj to less than 100

A and keep it

constant. To do this, all quiescent operating current is
returned to the output terminal. This imposes the requirement
for a minimum load current. If the load current is less than this
minimum, the output voltage will rise.

Since the LM317L is a floating regulator, it is only the

voltage differential across the circuit which is important to
performance, and operation at high voltages with respect to
ground is possible.

Vref

Adjust

Vin

Vout

LM317L

IPROG

Vout

IAdj

Vref = 1.25 V Typical

Figure 17. Basic Circuit Configuration

Load Regulation

The LM317L is capable of providing extremely good load

regulation, but a few precautions are needed to obtain
maximum performance. For best performance, the
programming resistor (R1) should be connected as close to
the regulator as possible to minimize line drops which
effectively appear in series with the reference, thereby
degrading regulation. The ground end of R2 can be returned
near the load ground to provide remote ground sensing and
improve load regulation.

External Capacitors

A 0.1

F disc or 1.0

F tantalum input bypass capacitor

(Cin) is recommended to reduce the sensitivity to input line
impedance.

The adjustment terminal may be bypassed to ground to

improve ripple rejection. This capacitor (CAdj) prevents ripple
from being amplified as the output voltage is increased. A
10

F capacitor should improve ripple rejection about 15 dB

at 120 Hz in a 10 V application.

Although the LM317L is stable with no output capacitance,

like any feedback circuit, certain values of external
capacitance can cause excessive ringing. An output
capacitance (CO) in the form of a 1.0

F tantalum or 25

aluminum electrolytic capacitor on the output swamps this
effect and insures stability.

Protection Diodes

When external capacitors are used with any IC regulator it

is sometimes necessary to add protection diodes to prevent
the capacitors from discharging through low current points
into the regulator.

Figure 14 shows the LM317L with the recommended

protection diodes for output voltages in excess of 25 V or high
capacitance values (CO > 10

F, CAdj > 5.0

F). Diode D1

prevents CO from discharging thru the IC during an input
short circuit. Diode D2 protects against capacitor CAdj
discharging through the IC during an output short circuit. The
combination of diodes D1 and D2 prevents CAdj from
discharging through the IC during an input short circuit.

Vin

Cin

1N4002

LM317L

Vout

CAdj

1N4002

Adjust

Figure 18. Voltage Regulator with

Protection Diodes

LM317L

MOTOROLA ANALOG IC DEVICE DATA

Figure 19. Adjustable Current Limiter

Figure 20. 5 V Electronic Shutdown Regulator

Figure 21. Slow TurnOn Regulator

Figure 22. Current Regulator

Vref

+25V

Vin

LM317L

Vout

1.25k

Adjust

D2
1N914

1N5314

500

* To provide current limiting of IO

to the system ground, the source of
the current limiting diode must be tied to
a negative voltage below 7.25 V.

Vref

R1 =

VSS*

D1
1N914

VO < POV + 1.25 V + VSS

ILmin IP < IO < 100 mA IP

As shown O < IO < 95 mA

Vin

Vout

240

1N4002

LM317L

Adjust

MPS2907

50k

Vin

1N4002

Vout

120

Adjust

720

1.0

MPS2222

1.0k

TTL
Control

LM317L

Minimum Vout = 1.25 V

D1 protects the device during an input short circuit.

LM317L

Vin

Adjust

IAdj

Iout

Ioutmax =

Vref

+ IAdj

5.0 mA < Iout < 100 mA

Vout

1.25 V

Ioutmax =

Vref

+ IAdj

1.25 V

IDSS

IOmax + IDSS

R1 + R2

LM317L

MOTOROLA ANALOG IC DEVICE DATA

OUTLINE

DIMENSIONS

Z SUFFIX

PLASTIC PACKAGE

CASE 2904

ISSUE AD

D SUFFIX

PLASTIC PACKAGE

CASE 75105

(SOP8)

ISSUE R

SECTION XX

X X

SEATING
PLANE

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.
3. CONTOUR OF PACKAGE BEYOND DIMENSION R

IS UNCONTROLLED.

4. DIMENSION F APPLIES BETWEEN P AND L.

DIMENSION D AND J APPLY BETWEEN L AND K
MINIMUM. LEAD DIMENSION IS UNCONTROLLED
IN P AND BEYOND DIMENSION K MINIMUM.

DIM

MIN

MAX

MIN

MAX

MILLIMETERS

INCHES

0.175

0.205

4.45

5.20

0.170

0.210

4.32

5.33

0.125

0.165

3.18

4.19

0.016

0.022

0.41

0.55

0.016

0.019

0.41

0.48

0.045

0.055

1.15

1.39

0.095

0.105

2.42

2.66

0.015

0.020

0.39

0.50

0.500

12.70

0.250

6.35

0.080

0.105

2.04

2.66

0.100

2.54

0.115

2.93

0.135

3.43

SEATING
PLANE

0.25

C B

0.25

X 45

DIM

MIN

MAX

MILLIMETERS

1.35

1.75

0.10

0.25

0.35

0.49

0.18

0.25

4.80

5.00

1.27 BSC

3.80

4.00

5.80

6.20

0.40

1.25

0.25

0.50

NOTES:

1. DIMENSIONING AND TOLERANCING PER ASME

Y14.5M, 1994.

2. DIMENSIONS ARE IN MILLIMETERS.
3. DIMENSION D AND E DO NOT INCLUDE MOLD

PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE MOLD

PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.

0.10

LM317L

MOTOROLA ANALOG IC DEVICE DATA

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals"
must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.

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LM317L/D

*LM317L/D*

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LM317LBD

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LM317LBD