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LM317MBSTT1
Datasheet
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MOTOROLA LM317MBSTT1, LM317MBDTRK, LM317MBDT, LM317MADTRK, LM317MABT Datasheet

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Semiconductor Components Industries, LLC, 1999
November, 1999 – Rev. 6
1 Publication Order Number:
LM317M/D
LM317M
Three-Terminal Adjustable Output Positive V oltage Regulator
The LM317M serves a wide variety of applications including local, on–card regulation. This device also makes an especially simple adjustable switching regulator, a programmable output regulator , or by connecting a fixed resistor between the adjustment and output, the LM317M can be used as a precision current regulator.
• Output Current in Excess of 500 mA
• Output Adjustable between 1.2 V and 37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output T ransistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
• 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 I
Adj
is controlled to less than 100 µA, the error associated with this
term is negligible in most applications.
LM317M
V
in
V
out
R
1
240
R
2
Adjust
I
Adj
*
C
in
0.1µF
**
+
C
O
1.0µF
V
in
V
out
V
out
+
1.25 V
ǒ
1
)
R
2
R
1
Ǔ
)
I
AdjR2
TO–220AB
T SUFFIX
CASE 221A
1
2
3
PIN ASSIGNMENT
1 2 3V
in
Adjust
V
out
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ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 10 of this data sheet.
1
2
3
1
3
Heatsink Surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
SOT–223
ST SUFFIX
CASE 318E
DPAK DT SUFFIX CASE 369A
Heatsink surface connected to Pin 2
2
LM317M
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2
MAXIMUM RATINGS (T
A
= 25°C, unless otherwise noted.)
Rating
Symbol Value Unit
Input–Output Voltage Differential VI–V
O
40 Vdc
Power Dissipation (Package Limitation) (Note 1)
Plastic Package, T Suffix, Case 221A
TA = 25°C
Thermal Resistance, Junction–to–Air Thermal Resistance, Junction–to–Case
Plastic Package, DT Suffix, Case 369A
TA = 25°C
Thermal Resistance, Junction–to–Air Thermal Resistance, Junction–to–Case
Plastic Package, ST Suffix, Case 318E
TA = 25°C
Thermal Resistance, Junction–to–Air Thermal Resistance, Junction–to–Case
P
D
θ
JA
θ
JC
P
D
θ
JA
θ
JC
P
D
θ
JA
θ
JC
Internally Limited
70
5.0
Internally Limited
92
5.0
Internally Limited
245
15
°C/W °C/W
°C/W °C/W
°C/W °C/W
Operating Junction Temperature Range T
J
–40 to +125 °C
Storage Temperature Range T
stg
–65 to +150 °C
NOTE: 1. Figure 23 provides thermal resistance versus pc board pad size.
ELECTRICAL CHARACTERISTICS (V
I–VO
= 5.0 V; IO = 0.1 A, TJ = T
low
to T
high
[Note 1], unless otherwise noted.)
Characteristics Figure Symbol Min Typ Max Unit
Line Regulation (Note 2)
TA = 25°C, 3.0 V ≤ VI–VO ≤ 40 V
1 Reg
line
– 0.01 0.04 %/V
Load Regulation (Note 2)
TA = 25°C, 10 mA ≤ IO ≤ 0.5 A
VO ≤ 5.0 V VO ≥ 5.0 V
2 Reg
load
– –
5.0
0.1
25
0.5mV% V
O
Adjustment Pin Current 3 I
Adj
– 50 100 µA
Adjustment Pin Current Change
2.5 V ≤ VI–VO ≤ 40 V, 10 mA ≤ IL ≤ 0.5 A, PD ≤ P
max
1,2 ∆I
Adj
– 0.2 5.0 µA
Reference Voltage
3.0 V ≤ VI–VO ≤ 40 V, 10 mA ≤ IO ≤ 0.5 A, PD ≤ P
max
:
3 V
ref
1.200 1.250 1.300
V
Line Regulation (Note 2)
3.0 V ≤ VI–VO ≤ 40 V
1 Reg
line
– 0.02 0.07 %/V
Load Regulation (Note 2)
10 mA ≤ IO ≤ 0.5 A
VO ≤ 5.0 V VO ≥ 5.0 V
2 Reg
load
– –
20
0.3
70
1.5mV% 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
VI–VO = 40 V, PD ≤ P
max
, TA = 25°C
3 I
max
0.5
0.15
0.9
0.25
– –
A
RMS Noise, % of V
O
TA= 25°C, 10 Hz ≤ f ≤ 10 kHz
– N – 0.003 – % V
O
Ripple Rejection, VO = 10 V, f = 120 Hz (Note 3)
Without C
Adj
C
Adj
= 10 µF
4 RR
–
66
65 80
– –
dB
Long–Term Stability, TJ = T
high
(Note 4)
TA= 25°C for Endpoint Measurements
3 S – 0.3 1.0 %/1.0 k
Hrs.
NOTES: 1.T
low
to T
high
= 0° to +125°C for LM317M T
low
to T
high
= –40 ° to +125°C for LM317MB
2. 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.
3.C
Adj
, when used, is connected between the adjustment pin and ground.
4.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.
LM317M
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3
Representative Schematic Diagram
18k
6.8V
6.8V
350
300 300 300 3.0k 300 70
200k
1.2560
50
130
8.67k
500
400
2.4k
12.8k
V
out
5.1k
6.3V
2.0k 6.0k
Adjust
V
in
180 180
10 pF
10 pF
LM317M
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4
* Pulse Testing Required:
1% Duty Cycle is suggested.
Line Regulation (%/V) =
VOH – V
OL
x 100
*
V
CC
V
IH
VILV
in
V
out
V
OH
V
OL
R
L
+
1.0µFC
O
240
1%
R
1
Adjust
R2
1%
C
in
0.1µF
LM317M
I
Adj
Figure 1. Line Regulation and ∆I
Adj
/Line Test Circuit
V
OL
* 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)
LM317M
C
in
0.1µF
Adjust
R
2
1%
C
O
1.0µF
+
*
R
L
(max Load)
R
L
(min Load)
V
out
R
1
240 1%
V
in
V
in
I
Adj
I
L
Figure 2. Load Regulation and ∆I
Adj
/Load T est Circuit
VO (min Load)
LM317M
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5
*Pulse Testing Required: 1% Duty Cycle is suggested.
LM317M
V
in
V
out
Adjust
R
1
240 1%
+
1µFC
O
R
L
C
in
R
2
1%
T o Calculate R2: V
out
= I
SET R2
+ 1.250 V
Assume I
SET
= 5.25 mA
I
L
I
Adj
I
SET
V
ref
V
O
V
I
0.1µF
Figure 3. Standard Test Circuit
LM317M
V
in
V
out
V
out
= 10 V
R
L
C
in
0.1µF
Adjust
R
1
240 1%
D1 * 1N4002
C
O
+
1.0µF
24V 14V
R
2
1.65K 1%
C
Adj
10µF
+
*D1 Discharges C
Adj
if Output is Shorted to Ground.
**C
Adj
provides an AC ground to the adjust pin.
f = 120 Hz
V
O
**
Figure 4. Ripple Rejection Test Circuit
LM317M
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I
out
, OUTPUT CURRENT (A)
I
B
, QUIESCENT CURRENT (mA)
V
in
–V
out
, INPUT–OUTPUT VOLTAGE
DIFFERENTIAL (V)
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
–0.2 –0.4 –0.6 –0.8 –1.0
–50 –25 0 25 50 75 100 125 150
∆ V
out
TJ, JUNCTION TEMPERATURE (°C)
, OUTPUT VOLTAGE CHANGE (%)
Vin = 45 V V
out
= 5.0 V
IL = 5.0 mA to 40 mA
Vin = 10 V V
out
= 5.0 V
IL = 5.0 mA to 100 mA
80
70
60
50
RR, RIPPLE REJECTION (dB)
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
IL = 100 mA f = 120 Hz V
out
= 10 V
Vin = 14 V to 24 V
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
2.5
2.0
1.5
1.0
0.5
IL = 500 mA
1.0
0.80
0.60
0.40
0.20
0
01020304050
Vin–V
out
, INPUT–OUTPUT VOLTAGE DIFFERENTIAL (V)
TJ = 25°C
TJ = 125°C
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
010203040
V
in–Vout
, INPUT–OUTPUT VOLTAGE DIFFERENTIAL (Vdc)
100
90 80 70 60 50 40 30 20 10
10 100 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 V
PP
V
out
= 1.25 V
90
Without C
Adj
= 10 µF
Without C
Adj
IL = 100 mA
TJ = 25°C
TJ = 125°C
LM317M
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V
out
, OUTPUT VOLTAGE∆
DEVIATION (V)
V
out
, OUTPUT VOLTAGE∆
DEVIATION (V)
V
in
, INPUT VOLTAGE∆
CHANGE (V)
V
out
, OUTPUT VOLTAGE CHANGE (%)∆
I
Adj
, ADJUSTMENT PIN CURRENT ( A)µ
ref
V , REFERENCE VOLTAGE (V)
CL = 0.3 µF; C
Adj
= 10 µF
Figure 11. Temperature Stability Figure 12. Adjustment Pin Current
Figure 13. Line Regulation Figure 14. Output Noise
Figure 15. Line Transient Response
010203040
t, TIME (µs)
CL = 1.0 µF
CL = 0
V
in
V
out
= 10 V IL = 50 mA TJ = 25°C
010203040
t, TIME (µs)
I
CURRENT (A)
L
, LOAD
CL = 1.0 µF; CAdj = 10 µF
Vin = 15 V V
out
= 10 V INL = 50 mA TJ = 25°C
I
L
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Vin = 4.2 V V
out
= V
ref
IL = 5.0 mA
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Vin = 6.25 V
V
out
= V
ref
IL = 10 mA IL = 100 mA
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Vin = 4.25 V to 41.25 V V
out
= V
ref
IL = 5.0 mA
–50 –25 0 25 50 75 100 125 150
TJ, JUNCTION TEMPERATURE (°C)
Bandwidth 100 Hz to 10 kHz
Figure 16. Load Transient Response
1.5
1.0
0.5 0
–0.5 –1.0 –1.5
1.0
0.5 0
3.0
2.0
1.0 0
–1.0 –2.0 –3.0
1.5
1.0
0.5 0
1.260
1.250
1.240
1.230
1.220
80 70 65 60 55 50 45 40 35
0.4
0.2 0
–0.2 –0.4 –0.6 –0.8 –1.0
10
8.0
6.0
4.0
NOISE VOLTAGE ( V)µ
LM317M
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8
APPLICATIONS INFORMATION
Basic Circuit Operation
The LM317M is a three–terminal floating regulator. In
operation, the LM317M develops and maintains a nominal
1.25 V reference (V
ref
) between its output and adjustment terminals. This reference voltage is converted to a programming current (I
PROG
) by R1 (see Figure 17), and this constant current flows through R2 to ground. The regulated output voltage is given by:
V
out
+
V
ref
ǒ
1
)
R
2
R
1
Ǔ
)
I
AdjR2
Since the current from the terminal (I
Adj
) represents an error term in the equation, the LM317M was designed to control I
Adj
to less than 100 µA and keep it constant. T o 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 LM317M 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.
+
V
ref
Adjust
V
in
V
out
LM317M
R
1
I
PROG
V
out
R
2
I
Adj
V
ref
= 1.25 V Typical
Figure 17. Basic Circuit Configuration
Load Regulation
The LM317M 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 µF disc or 1.0 µF 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 (C
Adj
) prevents
ripple from being amplified as the output voltage is increased. A 10 µF capacitor should improve ripple rejection about 15 dB at 120 Hz in a 10 V application.
Although the LM317M 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 µF tantalum or 25 µF 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 18 shows the LM317M with the recommended protection diodes for output voltages in excess of 25 V or high capacitance values (CO > 25 µF, C
Adj
> 5.0 µF). Diode
D1 prevents CO from discharging thru the IC during an input short circuit. Diode D2 protects against capacitor C
Adj
discharging through the IC during an output short circuit. The combination of diodes D1 and D2 prevents C
Adj
from
discharging through the IC during an input short circuit.
D
1
V
in
C
in
1N4002
LM317M
V
out
R
1
+
C
O
D
2
R
2
C
Adj
1N4002
Adjust
V
out
Figure 18. Voltage Regulator with
Protection Diodes
LM317M
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Figure 19. Adjustable Current Limiter Figure 20. 5 V Electronic Shutdown Regulator
Figure 21. Slow Turn–On Regulator Figure 22. Current Regulator
V
ref
+25V
V
in
LM317M
V
out
R
1
V
O
1.25k
Adjust
I
O
D2 1N914
1N5314
R
2
500
* To provide current limiting of I
O
to the system ground, the source of the current limiting diode must be tied to a negative voltage below – 7.25 V.
R2 ≥
V
ref
R1 =
VSS*
D1 1N914
VO < POV + 1.25 V + V
SS
I
Lmin
– IP < IO < 500 mA – I
P
As shown O < IO < 495 mA
+
10µF
V
in
V
out
240
1N4001
LM317M
Adjust
MPS2907
R
2
50k
V
in
D
1
1N4002
V
out
120
Adjust
720
+
1.0µF
MPS2222
1.0k
TTL Control
LM317M
Minimum V
out
= 1.25 V
D1 protects the device during an input short circuit.
LM317M
V
in
R
1
R
2
Adjust
I
Adj
I
out
5.0 mA < I
out
< 100 mA
V
out
I
outmax
=
V
ref
+ I
Adj
^
1.25 V
R1 + R
2
V
out
V
out
V
in
I
DSS
I
Omax
+ I
DSS
R1 + R
2
40
50
60
70
80
90
100
0
0.4
0.8
1.2
1.6
2.0
2.4
010203025155.0 L, LENGTH OF COPPER (mm)
P
D(max)
for TA = 50°C
Minimum
Size Pad
L
L
ÎÎÎ
ÎÎÎ
ÎÎÎ
Free Air Mounted Vertically
R
θJA
2.0 oz. Copper
Figure 23. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
Figure 24. SOT–223 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
40
80
120
160
200
240
280
0.35
0.42
0.50
0.63
0.83
1.25
2.50
010203025155.0 L, LENGTH OF COPPER (mm)
P
D(max)
for TA = 50°C
Minimum
Size Pad
P
L
L
APOERPAON
Free Air Mounted
Vertically
R
θJA
2.0 oz. Copper
R
, T
HER
M
A
L
RE
SIST
AN
C
E
,
JAθ
J
U
N
CTI
ON
–T
O
–
A
I
R
( C/W)°
LM317M
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10
ORDERING INFORMATION
Device Operating Temperature Range Package Shipping
LM317MT TJ = 0°C to 125°C TO–220 50 units/rail LM317MDT TJ = 0°C to 125°C DPAK 75 units/rail LM317MDTRK TJ = 0°C to 125°C DPAK 2500 units/Tape & Reel LM317MSTT3 TJ = 0°C to 125°C SOT–223 4000 units/Tape & Reel LM317MBT TJ = –40°C to 125°C TO–220 50 units/rail LM317MBDT TJ = –40°C to 125°C DPAK 75 units/rail LM317MBDTRK TJ = –40°C to 125°C DPAK 2500 units/Tape & Reel LM317MBSTT3 TJ = –40°C to 125°C SOT–223 4000 units/Tape & Reel
P ACKAGE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 221A–09
ISSUE Z
(SOT–223)
ST SUFFIX
PLASTIC PACKAGE
CASE 318E–04
ISSUE J
H
S
F
A
B
D
G
L
4
123
0.08 (0003)
C
M
K
J
DIMAMIN MAX MIN MAX
MILLIMETERS
0.249 0.263 6.30 6.70
INCHES
B 0.130 0.145 3.30 3.70 C 0.060 0.068 1.50 1.75 D 0.024 0.035 0.60 0.89
F 0.115 0.126 2.90 3.20 G 0.087 0.094 2.20 2.40 H 0.0008 0.0040 0.020 0.100
J 0.009 0.014 0.24 0.35 K 0.060 0.078 1.50 2.00
L 0.033 0.041 0.85 1.05 M 0 10 0 10 S 0.264 0.287 6.70 7.30
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
____
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION Z DEFINES A ZONE WHERE ALL BODY AND LEAD IRREGULARITIES ARE ALLOWED.
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A 0.570 0.620 14.48 15.75 B 0.380 0.405 9.66 10.28 C 0.160 0.190 4.07 4.82 D 0.025 0.035 0.64 0.88 F 0.142 0.147 3.61 3.73 G 0.095 0.105 2.42 2.66 H 0.110 0.155 2.80 3.93 J 0.018 0.025 0.46 0.64 K 0.500 0.562 12.70 14.27 L 0.045 0.060 1.15 1.52 N 0.190 0.210 4.83 5.33 Q 0.100 0.120 2.54 3.04 R 0.080 0.110 2.04 2.79 S 0.045 0.055 1.15 1.39 T 0.235 0.255 5.97 6.47 U 0.000 0.050 0.00 1.27 V 0.045 ––– 1.15 ––– Z ––– 0.080 ––– 2.04
Q
H
Z
L
V
G
N
A
K
123
4
D
SEATING PLANE
–T–
C
S
T
U
R J
LM317M
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11
P ACKAGE DIMENSIONS
(DPAK)
DT SUFFIX
PLASTIC PACKAGE
CASE 369A–13
ISSUE Z
D
A
K
B
R
V
S
F
L
G
2 PL
M
0.13 (0.005) T
E
C
U
J
H
–T–
SEATING PLANE
Z
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A 0.235 0.250 5.97 6.35 B 0.250 0.265 6.35 6.73 C 0.086 0.094 2.19 2.38 D 0.027 0.035 0.69 0.88 E 0.033 0.040 0.84 1.01 F 0.037 0.047 0.94 1.19 G 0.180 BSC 4.58 BSC H 0.034 0.040 0.87 1.01
J 0.018 0.023 0.46 0.58 K 0.102 0.114 2.60 2.89 L 0.090 BSC 2.29 BSC R 0.175 0.215 4.45 5.46 S 0.020 0.050 0.51 1.27 U 0.020 ––– 0.51 ––– V 0.030 0.050 0.77 1.27 Z 0.138 ––– 3.51 –––
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
123
4
LM317M
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without further notice to any products herein. SCILLC makes no warranty , representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC 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 special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC 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. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC 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 SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC 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 SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer .
PUBLICATION ORDERING INFORMATION
ASIA/PACIFIC: LDC for ON Semiconductor – Asia Support Phone: 303–675–2121 (Tue–Fri 9:00am to 1:00pm, Hong Kong T ime) Email: ONlit–asia@hibbertco.com
JAPAN: ON Semiconductor, Japan Customer Focus Center
4–32–1 Nishi–Gotanda, Shinagawa–ku, T okyo, Japan 141–8549
Phone: 81–3–5487–8345 Email: r14153@onsemi.com
ON Semiconductor Website: http://onsemi.com
For additional information, please contact your local Sales Representative.
LM317M/D
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