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2 LM117/217 LM V TO 37V VOLTAGE REGULATOR OUTPUT VOLTAGE RANGE: 1.2 TO 37V OUTPUT CURRENT IN EXCESS OF 1.5A 0.1% LINE AND LOAD REGULATION FLOATING OPERATION FOR HIGH VOLTAGES COMPLETE SERIES OF PROTECTIONS: CURRENT LIMITING, THERMAL SHUTDOWN AND SOA CONTROL DESCRIPTION The LM117/LM217/LM317 are monolithic integrated circuit in TO-220, TO-220FP, TO-3 and D 2 PAK 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. TO-220 D 2 PAK TO-220FP TO-3 Figure 1: Schematic Diagram September 2004 Rev. 10 1/15

3 Table 1: Absolute Maximum Ratings Symbol Parameter Value Unit V I - V O Input-Reference Differential Voltage 40 I O Output Current Internally Limited T op LM to 150 Operating Junction Temperature for: LM to 150 LM317 0 to 125 P tot Power Dissipation Internally Limited V C T stg Storage Temperature -65 to 150 C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 2: Thermal Data Symbol Parameter D 2 PAK TO-220 TO-220FP TO-3 Unit R thj-case Thermal Resistance Junction-case Max C/W R thj-amb Thermal Resistance Junction-ambient Max C/W Figure 2: Connection Diagram (top view) TO-220 TO-220FP D 2 PAK TO-3 Table 3: Order Codes TYPE TO-220 D 2 PAK TO-220FP TO-3 LM117 LM117K LM217 LM217T LM217D2T LM217K LM317 LM317T LM317D2T LM317P LM317K 2/15

4 Figure 3: Basic Adjustable Regulator Table 4: Electrical Characteristics For LM117/LM217 (V I - V O = 5 V, I O = 500 ma, I MAX = 1.5 A and P MAX = 20 W, T J = -55 to 150 C for LM117, T J = -25 to 150 C for LM217, unless otherwise specified) V Symbol Parameter Test Conditions Min. Typ. Max. Unit V O Line Regulation V I - V O = 3 to 40 V T J = 25 C %/V V O Load Regulation V O 5 V T J = 25 C 5 15 mv I O = 10 ma to I MAX V O 5 V T J = 25 C % I O = 10 ma to I MAX I ADJ Adjustment Pin Current µa I ADJ Adjustment Pin Current V I - V O = 2.5 to 40V I O = 10 ma to I MAX µa V REF Reference Voltage V I - V O = 2.5 to 40V I O = 10 ma to I MAX (between pin 3 and pin 1) P D P MAX V O /V O Output Voltage 1 % Temperature Stability I O(min) Minimum Load Current V I - V O = 40 V ma I O(max) Maximum Load Current V I - V O 15 V P D < P MAX A V I - V O = 40 V P D < P MAX 0.4 T J = 25 C en Output Noise Voltage (percentage of V O ) B = 10Hz to 100KHz T J = 25 C % SVR Supply Voltage Rejection (*) T J = 25 C f = 120Hz C ADJ =0 65 db C ADJ =10µF (*) C ADJ is connected between pin 1 and ground. 3/15

5 Table 5: Electrical Characteristics For LM317 (V I - V O = 5 V, I O = 500 ma, I MAX = 1.5 A and P MAX = 20 W, T J = 0 to 125 C, unless otherwise specified). 1.2 Symbol Parameter Test Conditions Min. Typ. Max. Unit V O Line Regulation V I - V O = 3 to 40 V T J = 25 C %/V V O Load Regulation V O 5 V T J = 25 C 5 25 mv I O = 10 ma to I MAX V O 5 V T J = 25 C % I O = 10 ma to I MAX I ADJ Adjustment Pin Current µa I ADJ Adjustment Pin Current V I - V O = 2.5 to 40 V I O = 10 ma to I MAX µa V REF Reference Voltage V I - V O = 2.5 to 40 V I O = 10 ma to I MAX V (between pin 3 and pin 1) P D P MAX V O /V O Output Voltage 1 % Temperature Stability I O(min) Minimum Load Current V I - V O = 40 V ma I O(max) Maximum Load Current V I - V O 15 V P D < P MAX A V I - V O = 40 V P D < P MAX 0.4 T J =25 C en Output Noise Voltage (percentage of V O ) B = 10Hz to 100KHz T J = 25 C % SVR Supply Voltage Rejection (*) T J = 25 C f = 120Hz C ADJ =0 65 db C ADJ =10µF (*) C ADJ is connected between pin 1 and ground. Figure 4: Output Current vs Input-output Differential Voltage Figure 5: Dropout Voltage vs Junction Temperature 4/15

6 Figure 6: Reference Voltage vs Junction Figure 7: 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 V O of: V O = V REF (1 + R 2 /R 1 ) + I ADJ R 2 The device was designed to minimize the term I ADJ (100µA max) and to maintain it very constant with line and load changes. Usually, the error term I ADJ R 2 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/ is a floating regulator and "sees" only the input-to-output differential 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 optimize the load regulation, the current set resistor R 1 (see fig. 4) should be tied as close as possible to the regulator, while the ground terminal of R 2 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 to improve the ripple rejection of about 15 db (C ADJ ). An 1µF tantalum (or 25µFAluminium electrolytic) 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. 5/15

7 Figure 8: Voltage Regulator with Protection Diodes D1 protect the device against input short circuit, while D2 protects against output short circuit for capacitors discharging. Figure 9: Slow Turn-on 15V Regulator Figure 10: Current Regulator V I ref 1.25V O = + I ADJ R 1 R 1 6/15

8 Figure 11: 5V Electronic Shut-down Regulator Figure 12: Digitally Selected Outputs (R 2 sets maximum V O ) Figure 13: Battery Charger (12V) * R S sets output impedance of charger Z O = R S (1 + R 2 /R 1 ). Use of R S allows low charging rates whit fully charged battery. 7/15

9 Figure 14: Current Limited 6V Charger * R 3 sets peak current (0.6A for 1 0). ** C 1 recommended to filter out input transients 8/15

10 TO-3 MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A B C D E G N P R U V P G A D C N O U V B E R P003C/C 9/15

11 TO-220 MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A C D D E F F F G G H L L L L L L DIA P011C 10/15

12 TO-220FP MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A B D E F F F G G H L L L L L L DIA A-H 11/15

13 D 2 PAK MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A A A B B C C D D E E G L L L M R V P011P6G 12/15

14 Tape & Reel D 2 PAK-P 2 PAK-D 2 PAK/A-P 2 PAK/A MECHANICAL DATA DIM. mm. inch MIN. TYP MAX. MIN. TYP. MAX. A C D N T Ao Bo Ko Po P /15

15 Table 6: Revision History Date Revision Description of Changes 01-Sep Mistake V REF ==> V O, tables 1, 4 and 5. 14/15

16 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners 2004 STMicroelectronics - All Rights Reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 15/15

KD A LOW DROP POSITIVE VOLTAGE REGULATOR ADJUSTABLE AND FIXED

KD A LOW DROP POSITIVE VOLTAGE REGULATOR ADJUSTABLE AND FIXED 7.5A LOW DROP POSITIVE VOLTAGE REGULATOR ADJUSTABLE AND FIXED THREE TERMINAL ADJUSTABLE OR FIXED OUTPUT VOLTAGE 1.5V,1.8V, 2.5V, 3.0, 3.3V OUTPUT CURRENT UP TO 7.5A 1.4V MAX DROPOUT VOLTAGE AT FULL LOAD