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LM117 / 217 LM317

1.2V TO 37V VOLTAGE REGULATOR

LM117 / 217 LM317
1.2V TO 37V VOLTAGE REGULATOR
DESCRIPTION The LM117 / LM217 / LM317 are monolithic integrated circuit in TO-220, ISOWATT220, TO-3 and D2PAK packages intended for use as positive adjustable voltage regulators. They are designed to supply more than 1.5A of load current with an output voltage adjustable over a 1.2 to 37V range. The nominal output voltage is selected by means of only a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators.
D2PAK
TO-220
ISOWATT220
ABSOLUTE MAXIMUM RATING
Symbol V i-o IO To p Parameter Input-output Differential Voltage Output Current Operating Junction Temperature for: LM117 LM217 LM317 Power Dissipation Storage Temperature Value 40 Intenrally Limited -55 to 150 -25 to 150 0 to 125 Internally Limited - 65 to 150
Unit V
THERMAL DATA
Symbol Parameter Max Max TO-3 4 35 TO-220 3 50 ISOWATT220 4 60 D2PAK 3 62.5 Unit
R t hj- case Thermal Resistance Junction-case R th j-a mb Thermal Resistance Junction-ambient
June 1998
LM117 / 217 / 317
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
TO-220
ISOWATT220
Type LM117 LM217 LM317
TO-3 LM117K LM217K LM317K
TO-220
ISOWATT220
LM217T LM317T LM317P
LM217D2T LM317D2T
SCHEMATIC DIAGRAM
LM117 / 217 / 317
BASIC ADJUSTABLE REGULATOR
LM117 / LM217 Min. Typ. 0.01 0.02 5 20 0.1 0.3 50 0.2 1.2 1.25 Max. 0.02 0.05 15 50 0.3 1 100 5 1.3 1.2 Min.
LM317 Typ. 0.01 0.02 5 20 0.1 0.3 50 0.2 1.25 Max. 0.04 0.07 25 70 0.5 1.5 100 5 1.3
Vo Vo I o(min) I o( max)
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Figure 1 : Output Current vs. Input-output Differential Voltage. Figure 2 : Dropout Voltage vs. Junction Temperature.
Figure 3 : Reference Voltage vs. Junction
Figure 4 : Basic Adjustable Regulator.
voltage, supplies of very high voltage with respect to ground can be regulated as long as the maximum input-to-output differential is not exceeded. Furthermore, programmable regulator are easily obtainable and, by connecting a fixed resistor between the adjustment and output, the device can be used as a precision current regulator. In order to optimise the load regulation, the current set resistor R1 (see fig. 4) should be tied as close as possible to the regulator, while the ground terminal of R2 should be near the ground of the load to provide remote ground sensing. Performance may be improved with added capacitance as follow: An input bypass capacitor of 0.1µF An adjustment terminal to ground 10µF capacitor
LM117 / 217 / 317
to improve the ripple rejection of about 15 dB (CADJ). An 1µF tantalium (or 25µFAluminium electrolitic) capacitor on the output to improve transient response. In additional to external capacitors, it is good Figure 5 : Voltage Regulator with Protection Diodes. practice to add protection diodes, as shown in fig.5. D1 protect the device against input short circuit, while D2 protect against output short circuit for capacitance discharging.
D1 protect the device against input short circuit, while D2 protects against output short circuit for capacitors discharging
Figure 6 : Slow Turn-on 15V Regulator.
Figure 7 : Current Regulator.
Vref R1
1.25V R1
LM117 / 217 / 317
Figure 8 : 5V Electronic Shut-down Regulator Figure 9 : Digitally Selected Outputs
(R2 sets maximum Vo)
Figure 10 : Battery Charger (12V)
Figure 11 : Current Limited 6V Charger
R3 sets peak current (0.6A for 1). C1 recommended to filter out input transients.
LM117 / 217 / 317
TO-3 (R) MECHANICAL DATA
mm MIN. A B C D E G N P R U V 30.10 3.88 10.9 16.9 26.2 4.09 39.50 1.185 0.152 0.96 TYP. 11.7 1.10 1.70 8.7 20.0 0.429 0.665 1.031 0.161 1.555 0.037 MAX. MIN. inch TYP. 0.460 0.043 0.066 0.342 0.787 MAX.
P003N
LM117 / 217 / 317
TO-220 MECHANICAL DATA
DIM. MIN. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147
mm TYP. MAX. 4.60 1.32 2.72 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 MIN. 0.173 0.048 0.094 4.40 1.23 2.40
inch TYP. MAX. 0.181 0.051 0.107 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 0.645 0.551 0.116 0.620 0.260 0.154 0.151
Dia. F2 F
P011C
LM117 / 217 / 317
ISOWATT220 MECHANICAL DATA
P011G
LM117 / 217 / 317
TO-263 (D2PAK) MECHANICAL DATA
mm MIN. A A1 B B2 C C2 D E G L L2 L3 4.3 2.49 0.7 1.25 0.45 1.21 8.95 10 4.88 15 1.27 1.4 TYP. MAX. 4.6 2.69 0.93 1.4 0.6 1.36 9.35 10.28 5.28 15.85 1.4 1.75 MIN. 0.169 0.098 0.027 0.049 0.017 0.047 0.352 0.393 0.192 0.590 0.050 0.055 inch TYP. MAX. 0.181 0.106 0.036 0.055 0.023 0.053 0.368 0.404 0.208 0.624 0.055 0.068
P011P6 / C
LM117 / 217 / 317