MOTOROLA LM317T4, LM317T, LM317D2TR4, LM317D2T, LM317BT4 Datasheet

Order this document by LM317/D

Three-Terminal Adjustable

Output Positive Voltage

Regulator

The LM317 is an adjustable 3±terminal positive voltage regulator capable of supplying in excess of 1.5 A 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 LM317 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 LM317 can be used as a precision current regulator.

•Output Current in Excess of 1.5 A

•Output Adjustable between 1.2 V and 37 V

•Internal Thermal Overload Protection

•Internal Short Circuit Current Limiting Constant with Temperature

•Output Transistor Safe±Area Compensation

•Floating Operation for High Voltage Applications

•Available in Surface Mount D2PAK, and Standard 3±Lead Transistor Package

•Eliminates Stocking many Fixed Voltages

Standard Application

	Vin	Vout
	LM317
		R1
	IAdj	240
		Adjust
C	*	+ C	**
in	μF	O	μF
0.1		1.0
		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.

Vout +	1.25 V 1 )	R2	) I	Adj	R	2
		R1

Since IAdj is controlled to less than 100 μA, the error associated with this term is negligible in most applications.

LM317

THREE±TERMINAL

ADJUSTABLE POSITIVE

VOLTAGE REGULATOR

SEMICONDUCTOR

TECHNICAL DATA

T SUFFIX

PLASTIC PACKAGE

CASE 221A

Heatsink surface connected to Pin 2.

1

2

3

Pin 1. Adjust

2.Vout

3.Vin

	D2T SUFFIX
	PLASTIC PACKAGE
	CASE 936		2
	(D2PAK)	1
			3

Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2.

ORDERING INFORMATION

		Operating
	Device	Temperature Range	Package
	LM317BD2T	TJ = ± 40° to +125°C	Surface Mount
	LM317BT		Insertion Mount
	LM317D2T	TJ = 0° to +125°C	Surface Mount
	LM317T		Insertion Mount

Motorola, Inc. 1996

Rev 1

		LM317
MAXIMUM RATINGS
Rating	Symbol		Value	Unit
Input±Output Voltage Differential	VI±VO		40	Vdc
Power Dissipation
Case 221A
TA = +25°C	PD		Internally Limited	W
Thermal Resistance, Junction±to±Ambient	θJA		65	°C/W
Thermal Resistance, Junction±to±Case	θJC		5.0	°C/W
Case 936 (D2PAK)
TA = +25°C	PD		Internally Limited	W
Thermal Resistance, Junction±to±Ambient	θJA		70	°C/W
Thermal Resistance, Junction±to±Case	θJC		5.0	°C/W
Operating Junction Temperature Range	TJ		± 40 to +125	°C
Storage Temperature Range	Tstg		± 65 to +150	°C

ELECTRICAL CHARACTERISTICS (VI±VO = 5.0 V; IO = 0.5 A for D2T and T packages; TJ = Tlow to Thigh [Note 1]; Imax and Pmax [Note 2]; unless otherwise noted.)

Characteristics	Figure	Symbol	Min	Typ	Max	Unit
Line Regulation (Note 3), TA = +25°C, 3.0 V ≤ VI±VO ≤ 40 V	1	Regline	±	0.01	0.04	%/V
Load Regulation (Note 3), TA = +25°C, 10 mA ≤ IO ≤ Imax	2	Regload
VO ≤ 5.0 V			±	5.0	25	mV
VO ≥ 5.0 V			±	0.1	0.5	% VO
Thermal Regulation, TA = +25°C (Note 6), 20 ms Pulse		Regtherm	±	0.03	0.07	% VO/W
Adjustment Pin Current	3	IAdj	±	50	100	μA
Adjustment Pin Current Change, 2.5 V ≤ VI±VO ≤ 40 V,	1, 2	IAdj	±	0.2	5.0	μA
10 mA ≤ IL ≤ Imax, PD ≤ Pmax
Reference Voltage, 3.0 V ≤ VI±VO ≤ 40 V,	3	Vref	1.2	1.25	1.3	V
10 mA ≤ IO ≤ Imax, PD ≤ Pmax
Line Regulation (Note 3), 3.0 V ≤ VI±VO ≤ 40 V	1	Regline	±	0.02	0.07	% V
Load Regulation (Note 3), 10 mA ≤ IO ≤ Imax	2	Regload
VO ≤ 5.0 V			±	20	70	mV
VO ≥ 5.0 V			±	0.3	1.5	% VO
Temperature Stability (Tlow ≤ TJ ≤ Thigh)	3	TS	±	0.7	±	% VO
Minimum Load Current to Maintain Regulation (VI±VO = 40 V)	3	ILmin	±	3.5	10	mA
Maximum Output Current	3	Imax				A
VI±VO ≤ 15 V, PD ≤ Pmax, T Package			1.5	2.2	±
VI±VO = 40 V, PD ≤ Pmax, TA = +25°C, T Package			0.15	0.4	±
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)	4	RR				dB
Without CAdj			±	65	±
CAdj = 10 μF			66	80	±
Long±Term Stability, TJ = Thigh (Note 5), TA = +25°C for	3	S	±	0.3	1.0	%/1.0 k
Endpoint Measurements						Hrs.
Thermal Resistance Junction to Case, T Package		RθJC	±	5.0	±	°C/W

NOTES: 1. Tlow to Thigh = 0° to +125°C, for LM317T, D2T. Tlow to Thigh = ± 40° to +125°C, for LM317BT, BD2T.

2.Imax = 1.5 A, Pmax = 20 W

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 Long±Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability from lot to lot.

6.Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die. These effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these temperature gradients on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.

2	MOTOROLA ANALOG IC DEVICE DATA

LM317

Representative Schematic Diagram

									Vin
31	310	230	120	5.6k
0									6.3V
								170
						6.7k	12k	160
							5.0pF	200	13k
125k	12.4k
							6.8k	510
	135
									6.3V
				30	30
				pF	pF	2.4k			105
6.3V
190	3.6k	5.8k	110	5.1k		12.5k			4.0
									0.1
									Vout

Adjust

This device contains 29 active transistors.

Figure 1. Line Regulation and

IAdj/Line Test Circuit

VCC

*

VIH

Line Regulation (% V)

+

|VOH±VOL|

x 100

VOH

VIL

|VOL|

VOL

Vin

LM317

Vout

* Pulse testing required.

Adjust

240

1% Duty Cycle

R1

+

is suggested.

0.1 μF

IAdj

1%

μF

R

C

in

C

O

1.0

L

R2

1%

MOTOROLA ANALOG IC DEVICE DATA	3