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LM117/217 LM317
1.2V TO 37V ADJUSTABLE VOLTAGE REGULATOR
.OUTPUTVOLTAGERANGE:1. .OUTPUTCURRENTI .0. .FLOATI .COMPLETE
2 TO 37V N EXCESS OF 1.5A
(0.5A for TO-39) 1% LINE AND LOAD REGULATION NG OPERATION FOR HIGH VOLTAGES SERIES OF PROTECTIONS : CURRENT LIMITING, THERMAL SHUTDOWN AND SOA CONTROL
TO-3
DESCRIPTION The LM117/LM217/LM317 are monolithic integrated circuit in TO-220 and TO-3 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. ABSOLUTE MAXIMUM RATING
Symbol Vi-o IO Top Output Current Operating Junction Temperature for: LM117 LM217 LM317 Parameter Input-output Differential Voltage
TO-220
TO-39
Value 40 Intenrally Limited -55 to 150 -25 to 150 0 to 125 Internally Limited
Unit V
o o
C C o C
P tot
Power Dissipation
THERMAL DATA
TO-3 Rthj-case Thermal Resistance Junction-case Rthj-amb Thermal Resistance Junction-ambient Max Max 4 35 TO-220 3 50 ISOWATT220 4 60 TO-39 15 160
o o
C/W C/W
March 1993
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LM117/LM217/LM317
PIN CONNECTION AND ORDERING NUMBER TO-220 TO-3 TO-3
pin 1 = INPUT pin2 = ADJ pin3 = OUTPUT Type LM117 LM217 LM317 TO-3 LM117K LM217K LM317K LM217T LM317T LM217P LM317P TO-220 ISOWATT220 TO-39 LM117H LM217H LM317H
SCHEMATIC DIAGRAM
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LM117/LM217/LM317
Basic adjustable regulator.
ELECTRICAL CHARACTERISTICS (Vi - Vo = 5 V, I o = 500 mA for TO-3 and TO-220, I o = 100 mA for TO-39, I MAX and P MA X according note 2, unless otherwise specified)
Symbol Vo Vo Parameter Line Regulation Load Regulation Test Conditions V i - Vo = 3 to 40 V V o 5V Io = 10 mA to IMAX V o 5V Io = 10 mA to IMAX IADJ IADJ VREF Adjustment Pin Current Adjustment Pin Current Reference Voltage (between pin 3 and pin 1) Output Voltage Temperature Stability Minimum Load Current Maximum Load Current V i - Vo = 40 V V i - Vo 15 V P D < PMAX V i - Vo = 40 V P D < PMAX Tj = 25 oC eN SVR Output Noise Voltage B = 10Hz to 10KHz (percentance of VO) Tj = 25 oC Supply Voltage Rejection (*) Tj = 25 oC f = 120 Hz CADJ=0 CADJ=10F 66 TO-3 TO-220 TO-39 TO-3 TO-220 TO-39 1.5 0.5 V i - Vo = 2.5 to 40 V Io = 10 mA to IMAX V i - Vo = 2.5 to 40 V Io = 10 mA to IMAX P D PMAX 1.2 Tj = 25 oC Tj = 25 oC Tj = 25 oC LM117/LM217 Min. Typ. 0.01 0.02 5 20 0.1 0.3 50 0.2 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 %/V %/V mV mV % % A A V Unit
Vo Vo Io(min) Io(max)
1 3.5 2.2 0.8 0.4 0.07 0.003 65 80 66 5 1.5 0.5
1 3.5 2.2 0.8 0.4 0.07 0.003 65 80 10
% mA A A A A % dB dB
(*) CADJ is connected between pin 1 and ground.
Note: (1) Unless otherwise specified the above specs, apply over the following conditions : LM 117 Tj = - 55 to 150C; LM 217 Tj = - 25 to 150C ; LM 317 Tj = 0 to 125C. (2) IMAX: 1.5 A for TO-3 and TO-220; 0.5 A for TO-39 PMAX: 20 W for TO-3 and TO-220; 2 W for TO-39 3/10
LM117/LM217/LM317
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.
APPLICATION INFORMATION The LM117/217/317 provides an internal reference voltage of 1.25V between the output and adjustments terminals. This is used to set a constant current flow across an external resistor divider (see fig. 4), giving an output voltage VO of: VO = VREF (1 +
R2 ) + IADJ R2 R1
The device was designed to minimize the term IADJ (100A max) and to maintain it very constant with line and load changes. Usually, the error term IADJ R2 can be neglected. To obtain the previous requirement, all the regulator quiescent current is returned to the output terminal, imposing a minimum load current condition. If the load is insufficient, the output voltage will rise. Since the LM117/217317 is a floating regulator and "sees" only the input-to-output differential voltage,
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supplies of very high voltage with respect to ground can be regulated as long as the maximum input-tooutput 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. No external capacitors are required, but performance may be improved with added capacitance as follow: An input bypass capacitor of 0.1 F
LM117/LM217/LM317
An adjustment terminal to ground 10 mF capacitor to improve the ripple rejection of about 15 dB (CADJ). An 1mF tantalium capacitor on the output to improve transient response. In additional to external capacitors, it is good 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.
Figure 5 : Voltage Regulator with Protection Diodes.
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.
Io =
Vref 1.25V + IADJ R1 R1
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LM117/LM217/LM317
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.
* RS sets output impedance of charger R2 Zo = RS (1 + ) R1 Use of RS allows low charging rates with fully charged battery.
* R3 sets peak current (0.6A for 1). ** C1 recommended to filter out input transients.
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LM117/LM217/LM317
TO-3 MECHANICAL DATA
mm MIN. A B C D E G N P R U V 11.00 0.97 1.50 8.32 19.00 10.70 16.50 25.00 4.00 38.50 30.00 TYP. MAX. 13.10 1.15 1.65 8.92 20.00 11.10 17.20 26.00 4.09 39.30 30.30 MIN. 0.433 0.038 0.059 0.327 0.748 0.421 0.649 0.984 0.157 1.515 1.187 inch TYP. MAX. 0.516 0.045 0.065 0.351 0.787 0.437 0.677 1.023 0.161 1.547 1.193
DIM.
P G
A
D
C
U
V
O
N
R
B
P003F
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E
LM117/LM217/LM317
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 15.2 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 15.9 6.6 4.2 3.85 0.511 0.104 0.598 0.244 0.137 0.147 4.40 1.23 2.40 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 0.645 0.551 0.116 0.625 0.260 0.165 0.151 mm TYP. MAX. 4.60 1.32 2.72 MIN. 0.173 0.048 0.094 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 inch TYP. MAX. 0.181 0.051 0.107
A
C
D1
L2 F1
D
G1
E
Dia. F2 F
L5 L7 L6
L9
L4
G
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H2
P011C
LM117/LM217/LM317
TO39 MECHANICAL DATA
mm DIM. MIN. A B D E F G H I L 5.08 1.2 0.9 45o (typ.) 12.7 0.49 6.6 8.5 9.4 0.200 0.047 0.035 TYP. MAX. MIN. 0.500 0.019 0.260 0.334 0.370 TYP. MAX. inch
D G I H E F
A
L B
P008B
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LM117/LM217/LM317
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
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