MOTOROLA LM317T4, LM317T, LM317D2TR4, LM317D2T, LM317BT4 Datasheet
...
SEMICONDUCTOR
TECHNICAL DATA
THREE–TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
Order this document by LM317/D
Device
Operating
Temperature Range
Package
T SUFFIX
PLASTIC PACKAGE
CASE 221A
ORDERING INFORMATION
LM317BT
LM317BD2T
Insertion Mount
Surface Mount
LM317T
LM317D2T
TJ = 0° to +125°C
Insertion Mount
Surface Mount
TJ = –40° to +125°C
Pin 1. Adjust
2. V
out
3. V
in
3
1
2
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
3
1
2
Heatsink surface
connected to Pin 2.
1
MOTOROLA ANALOG IC DEVICE DATA
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 D
2
PAK, and Standard 3–Lead Transistor
Package
• Eliminates Stocking many Fixed Voltages
Standard 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 I
Adj
is controlled to less than 100
µ
A, the error associated with this term is
negligible in most applications.
V
out
+
1.25 Vǒ1
)
R
2
R
1
Ǔ
)
I
Adj
R
2
LM317
V
in
V
out
R
1
240
R
2
Adjust
I
Adj
Cin*
0.1
µ
F
+
CO**
1.0
µ
F
Motorola, Inc. 1996 Rev 1
LM317
2
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating Symbol Value Unit
Input–Output Voltage Differential VI–V
O
40 Vdc
Power Dissipation
Case 221A
TA = +25°C P
D
Internally Limited W
Thermal Resistance, Junction–to–Ambient θ
JA
65 °C/W
Thermal Resistance, Junction–to–Case θ
JC
5.0 °C/W
Case 936 (D2PAK)
TA = +25°C P
D
Internally Limited W
Thermal Resistance, Junction–to–Ambient θ
JA
70 °C/W
Thermal Resistance, Junction–to–Case θ
JC
5.0 °C/W
Operating Junction Temperature Range T
J
–40 to +125 °C
Storage Temperature Range T
stg
–65 to +150 °C
ELECTRICAL CHARACTERISTICS (V
I–VO
= 5.0 V; IO = 0.5 A for D2T and T packages; TJ = T
low
to T
high
[Note 1]; I
max
and P
max
[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 Reg
line
– 0.01 0.04 %/V
Load Regulation (Note 3), TA = +25°C, 10 mA ≤ IO ≤ I
max
VO ≤ 5.0 V
VO ≥ 5.0 V
2 Reg
load
–
–
5.0
0.1
25
0.5
mV
% V
O
Thermal Regulation, TA = +25°C (Note 6), 20 ms Pulse Reg
therm
– 0.03 0.07 % VO/W
Adjustment Pin Current 3 I
Adj
– 50 100 µA
Adjustment Pin Current Change, 2.5 V ≤ VI–VO ≤ 40 V,
10 mA ≤ IL ≤ I
max
, PD ≤ P
max
1, 2 ∆I
Adj
– 0.2 5.0 µA
Reference Voltage, 3.0 V ≤VI–VO ≤ 40 V,
10 mA ≤ IO ≤ I
max
, PD ≤ P
max
3 V
ref
1.2 1.25 1.3 V
Line Regulation (Note 3), 3.0 V ≤ VI–VO ≤ 40 V 1 Reg
line
– 0.02 0.07 % V
Load Regulation (Note 3), 10 mA ≤ IO ≤ I
max
VO ≤ 5.0 V
VO ≥ 5.0 V
2 Reg
load
–
–
20
0.3
70
1.5
mV
% V
O
Temperature Stability (T
low
≤ TJ ≤ T
high
) 3 T
S
– 0.7 – % V
O
Minimum Load Current to Maintain Regulation (VI–VO = 40 V) 3 I
Lmin
– 3.5 10 mA
Maximum Output Current
VI–VO ≤ 15 V, PD ≤ P
max,
T Package
VI–VO = 40 V, PD ≤ P
max
, TA = +25°C, T Package
3 I
max
1.5
0.15
2.2
0.4
–
–
A
RMS Noise, % of VO, TA = +25°C, 10 Hz ≤ f ≤ 10 kHz N – 0.003 – % V
O
Ripple Rejection, VO = 10 V, f = 120 Hz (Note 4)
Without C
Adj
C
Adj
= 10 µF
4 RR
–
66
65
80
–
–
dB
Long–Term Stability, TJ = T
high
(Note 5), TA = +25°C for
Endpoint Measurements
3 S – 0.3 1.0 %/1.0 k
Hrs.
Thermal Resistance Junction to Case, T Package R
θJC
– 5.0 – °C/W
NOTES: 1. T
low
to T
high
= 0° to +125°C, for LM317T, D2T. T
low
to T
high
= –40° to +125°C, for LM317BT, BD2T.
2.I
max
= 1.5 A, P
max
= 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.C
Adj
, 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.
LM317
3
MOTOROLA ANALOG IC DEVICE DATA
Representative Schematic Diagram
This device contains 29 active transistors.
31
0
310 230 120
5.6k
V
in
170
6.3V
160
12k
5.0pF
6.8k
13k
6.3V
105
4.0
0.1
V
out
Adjust
12.5k
2.4k
30
pF
30
pF
6.3V
125k
135
190
12.4k
3.6k 5.8k 110 5.1k
6.7k
510
200
Figure 1. Line Regulation and ∆I
Adj
/Line Test Circuit
* Pulse testing required.
* 1% Duty Cycle
* is suggested.
*
V
CC
V
IH
V
IL
V
in
V
out
R
L
+
1.0
µ
FC
O
240
1%
R
1
Adjust
R
2
1%
C
in
0.1
µ
F
I
Adj
LM317
Line Regulation (%
ńV)+
|VOH–VOL|
|VOL|
x 100
V
OH
V
OL
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