Texas Instruments LM317MKTPR Datasheet
LM317M
3-TERMINAL ADJUSTABLE REGULATOR
SLVS297 – APRIL 2000
D
Output V oltage Range Adjustable From
1.2 V to 37 V
D
Output Current Greater Than 500 mA
D
Internal Short-Circuit Current Limiting
D
Thermal Overload Protection
D
Output Safe-Area Compensation
description
OUTPUT
The OUTPUT terminal is in electrical contact with
the mounting base.
KTP PACKAGE
(TOP VIEW)
INPUT
ADJUST
The LM317M device is an adjustable 3-terminal positive voltage regulator capable of supplying more than
500 mA over an output-voltage range of 1.2 V to 37 V. It is exceptionally easy to use and requires only two
external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed
regulators. The LM317M is packaged in the DP AK/TO-252-equivalent KTP package, which is easy to handle
and use.
In addition to higher performance than fixed regulators, the device includes on-chip current limiting, thermal
overload protection, and safe operating area protection. All overload protection remains fully functional if the
ADJUST terminal is disconnected.
Normally , no capacitors are needed unless the device is more than 6 inches from the input filter capacitors, in
which case an input bypass capacitor is needed. An optional output capacitor can be added to improve transient
response. The ADJUST terminal can be bypassed to achieve very high ripple-rejection ratios, which are difficult
to achieve with standard 3-terminal regulators.
The LM317M is characterized for operation over the virtual junction temperature range of 0°C to 125°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 2000, Texas Instruments Incorporated
1
LM317M
Line regulation (see Note 3)
V
V
V
%/V
Load regulation
I
500 mA
%V
Ripple rejection (see Note 4)
O
,,
dB
3-TERMINAL ADJUSTABLE REGULATOR
SLVS297 – APRIL 2000
absolute maximum ratings over operating temperature range (unless otherwise noted)
Input-to-output differential voltage, V
– VO 40 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
l
†
Package thermal impedance, θJA (see Notes 1 and 2) 28°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability.
2. The package thermal impedance is calculated in accordance with JESD 51.
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
recommended operating conditions
MIN MAX UNIT
Input-to-output voltage differential, VI – V
Output current, I
Operating virtual-junction temperature, T
O
O
J
37 V
500 mA
0 125 °C
electrical characteristics over recommended operating virtual-junction temperature range,
V
– VO = 5 V, IO = 0.1 A (unless otherwise noted)
I
PARAMETER TEST CONDITIONS
–
= 3 V to 40
I
O
= 10 mA to
O
ADJUST terminal current 50 100 µA
ADJUST terminal current change VI – VO = 3 V to 40 V, IO = 10 mA to 500 mA 0.2 5 µA
Reference voltage VI – VO = 3 V to 40 V, IO = 10 mA to 500 mA 1.2 1.25 1.3 V
Output-voltage temperature stability 0.7%
Minimum load current to maintain regulation 3.5 10 mA
VI – VO ≤ 15 V 500 900
Maximum output current
Output noise voltage (% of VO) f = 10 Hz to 10 KHz, TJ = 25°C 0.003%
pp
Long-term stability TJ = 125°C 0.3 1
‡
Pulse-testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible.
NOTES: 3. Input voltage regulation is expressed here as the percentage change in output voltage per 1-V change at the input.
4. C
is connected between the ADJUST pin and ground.
ADJ
VI – VO = 40 V,
Pd ≤ P
d(max)
V
= 10 V, f = 120 Hz,
TJ = 25°C
TJ = 25°C 0.01 0.04
Full temperature range 0.02 0.07
TJ = 25°C 0.1 0.5
Full temperature range 0.3 1.5
TJ = 25°C 150 250
C
C
‡
= 0 65
ADJ
= 10 µF 66 80
ADJ
MIN TYP MAX UNIT
O
mA
%/
1k Hrs
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
LM317M
3-TERMINAL ADJUSTABLE REGULATOR
SLVS297 – APRIL 2000
TYPICAL CHARACTERISTICS
1.00
VI = 4.25 V to 41.25 V
VO = V
0.90
IL = 10 mA
0.80
0.70
0.60
0.50
0.40
0.30
– Output V oltage Change – %
O
0.20
∆V
0.10
0
0 25 50 75 100 125
LINE REGULATION
TEMPERATURE
ref
TJ – Temperature – °C
Figure 1
vs
0.20
0.15
0.10
0.05
0.00
–0.05
–0.10
–0.15
–0.20
– Output V oltage Change – %
O
–0.25
∆V
–0.30
–0.35
–0.40
VI = 10 V
VO = 5 V
IL = 10 mA to 40 mA
02550
LOAD REGULATION
vs
TEMPERATURE
VI = 45 V
VO = 5 V
IL = 10 mA to 100 mA
75 100 125
TJ – Temperature – °C
Figure 2
ADJUST TERMINAL CURRENT
55
VI = 6.25 V
VO = V
53
A
51
µ
ADJUST Terminal Current –
IL = 100 mA
49
47
45
43
41
39
37
35
02550
vs
TEMPERATURE
ref
TJ – Temperature – °C
Figure 3
IL = 10 mA
75 100 125
1.260
1.255
1.250
1.245
1.240
1.235
– Reference Voltage – V
ref
1.230
V
1.225
1.220
TEMPERATURE STABILITY
vs
TEMPERATURE
VI = 4.25 V
VO = V
ref
IL = 10 mA
02550
TJ – Temperature – °C
Figure 4
75 100 125
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
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