Fairchild LM317M 3-terminal 0.5a positive adjustable regulator Datasheet

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LM317M
3-Terminal 0.5A Positive Adjustable Regulator
Features
Description
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The LM317M is a 3-terminal adjustable positive voltage
regulator capable of supplying in excess of 500mA over an
output voltage range of 1.2V to 37V. This voltage regulator
is exceptionally easy to use and requires only two external
resistors to set the output voltage.
Output Current in Excess of 0.5A
Output Adjustable Between 1.2V and 37V
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe Area Compensation
Floating Operation for High Voltage Applications
D-PAK
2
1 3
1. Adj 2. Output 3. Input
TO-220
12 3
Internal Block Diagram
V in 3
Input
+
-
V olta ge
Re fe re nce
P rote ction
Circ uitry
R lim it
2
Vo
Output
1
V ad j
Rev. 1.0.4
©2011 Fairchild Semiconductor Corporation
LM317M
Absolute Maximum Ratings
Parameter
Symbol
Value
Unit
Input-Output Voltage Differential
V I - VO
40
V
PD
Internally Limited
W
RθJC
RθJA
RθJA
5
81
100
°C/W
°C/W
°C/W
Tj
0 ~ +125
°C
TSTG
-65 ~ +125
°C
Power Dissipation
Thermal Resistance Junction-Case (TO-220)
Thermal Resistance Junction-Air (TO-220)
Thermal Resistance Junction-Air (D-PAK (Note1,2))
Operating Junction Temperature Range
Storage Temperature Range
Electrical Characteristics
(VI-VO = 5V, IO = 0.1A, 0°C ≤ TJ ≤ +125°C, PDMAX = 7.5W, unless otherwise specified)
Parameter
Line Regulation (Note3)
Symbol
Conditions
Min.
Typ.
Max.
Unit
TA = +25°C, 3V ≤ VI −VO ≤ 40V
-
0.01
0.04
%/ V
Rline
3V ≤ VI −VO ≤ 40V
-
0.02
0.07
-
Rload
TA =+25°C, 10mA ≤ IO ≤ 0.5A
VO ≤ 5V
VO ≥ 5V
5
0.1
25
0.5
mV
%/VO
10mA ≤ IO ≤ 0.5A
VO ≤ 5V
VO ≥ 5V
-
20
0.3
70
1.5
mV
%/VO
Load Regulation (Note3)
Adjustment Pin Current
IADJ
-
-
50
100
uA
Adjustment Pin Current Change
ΔIADJ
3V ≤ VI - VO ≤ 40V
10mA ≤ IO ≤ 0.5A, PD < PDMAX
-
0.2
5
uA
Reference Voltage
VREF
3V < VI - VO < 40V
1.20
10mA ≤ IO ≤ 0.5A, PD < PDMAX
1.25
1.30
V
-
0.7
-
%/VO
-
3.5
10
mA
VI - VO ≤ 15V, PD < PDMAX
0.5
0.9
-
VI - VO = 40V
PD < PDMAX, TA =+25°C
0.15
0.25
-
-
0.003
-
%/VO
66
65
80
-
dB
-
0.3
1
%/1000Hrs
Temperature Stability
Minimum Load Current to
Maintain Regulation
Maximum Output Current
STT
IL(MIN)
IO(MAX)
VI - VO = 40V
RMS Noise, % of VOUT
eN
TA = +25°C, 10Hz < f < 10kHz
Ripple Rejection
RR
VO = 10V, f = 120Hz
without CADJ
CADJ = 10uF (Note4)
Long-Term Stability
ST
TJ = +125°C, 1000Hours
A
Note:
1. Thermal resistance test board
Size: 76.2mm * 114.3mm * 1.6mm(1S0P)
JEDEC standard: JESD51-3, JESD51-7
2. Assume no ambient airflow.
3. Load and Line regulation are specified at constant junction temperature. Change 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.
2
LM317M
Typical Performance Characteristics
Figure 1. Minimum Load Current
Figure 3. Adjustment Pin Current vs. Temperature
Figure 5. Load Regulation vs. Temperature
Figure 2. Peak Output Current vs. Input-Output
Differential Voltage
Figure 4. Ripple Rejection vs. Frequency
Figure 6. Line Regulation vs. Temperature
3
LM317M
Typical Performance Characteristics (Continued)
Figure 7. Outputvoltage vs. Temperature
4
Figure 8. Thermal Shutdown
LM317M
Typical Application
D1
1N4002
VO
Input
LM317M
Output
+
120
1.0uF
VADJ
1K
720
KSP2222
TTL CONTROL
MINIMUM VO = 1.25V
Figure 1. 1 5V Electronic Shutdown Regulator
D1 protects the device during an input short circuit.
VO
LM317M
Output
Input
240
1N4001
50K
VADJ
KSP2907
+
R2
1.0uF
Figure 2. Slow Turn-On Regulator
IO
Input
R1
VO
LM317M
R2
Output
VADJ
IADJ
I
I
OMAX
V
REF
1.25V
= ⎛ -----------------⎞ + I
≅ ---------------⎝ R1 ⎠ ADJ
R1
V
REF
1.25V
= ⎛ ----------------------⎞ + I
≅ ---------------------OMAX ⎝ R1 + R2⎠ ADJ R1 + R2
5mA < I
O
< 500mA
Figure 3. Current Regulator
5
LM317M
Mechanical Dimensions
Package
Dimensions in millimeters
D-PAK
0.89 ±0.10
MIN0.55
0.91 ±0.10
0.50 ±0.10
9.50 ±0.30
0.76 ±0.10
0.50 ±0.10
1.02 ±0.20
2.30TYP
[2.30±0.20]
(1.00)
(3.05)
(2XR0.25)
(0.10)
6.60 ±0.20
(5.34)
(5.04)
(1.50)
(0.70)
2.30 ±0.20
(0.90)
2.70 ±0.20
2.30 ±0.10
2.70 ±0.20
2.30TYP
[2.30±0.20]
(0.50)
6.10 ±0.20
MAX0.96
(4.34)
9.50 ±0.30
0.80 ±0.20
0.60 ±0.20
(0.50)
6.10 ±0.20
5.34 ±0.30
0.70 ±0.20
6.60 ±0.20
0.76 ±0.10
6
LM317M
Mechanical Dimensions (Continued)
Package
Dimensions in millimeters
TO-220 [SINGLE GAUGE]
7
LM317M
Ordering Information
Product Number
Package
LM317MDT
D-PAK
LM317MT
TO-220
Operating Temperature
0 ~ 125°C
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PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
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DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
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© 2011 Fairchild Semiconductor Corporation
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