LD1117 SERIES LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS

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1 LD7 SERIES LOW DROP FIXED AND ADJUSTABLE POSITIE OLTAGE REGULATORS LOW DROPOUT OLTAGE ( TYP) 2.85 DEICE PERFORMANCES ARE SUITABLE FOR SCSI-2 ACTIE TERMINATION OUTPUT CURRENT UP TO 800mA FIXED OUTPUT OLTAGE OF: 2.5, 2.85, 3.0, 3.3, 5.0 ADJUSTABLE ERSION AAILABILITY (ref=5) INTERNAL CURRENT AND THERMAL LIMIT AAILABLE IN ± % (AT 25 o C) AND 2% IN ALL TEMPERATURE RANGE SUPPLY OLTAGE REJECTION : 75 db (TYP) TEMPERATURE RANGE : 0 o C TO 25 o C SOT-223 SO-8 DESCRIPTION The LD7 is a LOW DROP oltage Regulator able to provide up to 800mA of Output Current, available even in adjustab le version (ref=5). Concerning fixed versions, are offered the following Output oltages: 2.5, 2.85, and 5.0. The 2.85 type is ideal for SCSI-2 lines active termination. The device is supplied in: SOT-223, DPAK, SO-8 and TO-220. The SOT-223 and DPAK surface mount packages optimize the thermal characteristics even offering a relevant space saving effect. High efficency is assured by NPN BLOCK DIAGRAM TO-252 (DPAK) TO-220 pass transistor. In fact in this case, unlike than PNP one, the Quiescent Current flows mostly into the load. Only a very common 0µF minimum capacitor is needed for stability. On chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± % at 25 o C. The ADJUSTABLE LD7 is pin to pin compatible with the other standard Adjustable voltage regulators maintaining the better performances in terms of Drop and Tolerance. April 998 /7

2 ABSOLUTE MAXIMUM RATINGS Symbol Parameter alue Unit IN DC Input oltage 5 P tot Power Dissipation 2 W Tstg Storage Temperature Range -40 to 50 o C T op Operating Junction Temperature Range 0 to 25 o C Absolute Maximum Ratings are those value beyond which damage to the device may occur. Functional operation under these condition is not implied. Over the above suggested Max Power Dissipation a Short Circuit could definetively damage the device. THERMAL DATA Symbol Parameter SOT-223 SO-8 DPAK TO-220 Unit R thj-case Rth j-a mb Thermal Resistance Junction-case Thermal Resistance Junction-ambient o C/W o C/W APPLICATION CIRCUIT 2/7

3 CONNECTION DIAGRAM AND ORDERING NUMBERS (top view) SOT-223 SO-8 DPAK TO-220 SOT-223 SO-8 DPAK TO-220 Output oltage LD7S25 LD7S25C LD7S28 LD7S30 LD7S30C LD7S33 LD7S33C LD7S50 LD7S50C LD7D25 LD7D25C LD7D28 LD7D30 LD7D30C LD7D33 LD7D33C LD7D50 LD7D50C LD7DT25 LD7DT25C LD7DT28 LD7DT30 LD7DT30C LD7DT33 LD7DT33C LD7DT50 LD7DT50C LD725 LD725C LD728 LD730 LD730C LD733 LD733C LD750 LD750C LD7S LD7D LD7DT LD7 ADJUSTABLE FROM 5 TO 5 3/7

4 ELECTRICAL CHARACTERISTICS FOR LD7#25 (refer to the test circuits, T j = 0 to 25 o C, C o =0µF unless otherwise specified) o Output oltage in = 4.5 Io =0mA Tj =25 o C o Output oltage Io = 0 to 800 ma in = 3.9 to o Line Regulation in = 3.9 to 0 Io = 0mA 6 m o Load Regulation in = 3.9 I o = 0 to 800 ma 0 m o Temperature Stability 0.5 % o Long Term Stability 000 hrs T j = 25 o C 0.3 % in Operating Input oltage I o = 00 ma 5 Id Quiescent Current in ma Io Output Current in = 7.5 Tj =25 o C ma en Output Noise oltage B = 0Hz to 0KHz Tj =25 o C 00 µ SR Supply oltage Rejection Io = 40 ma f = 20 Hz Tj =25 o C db in = 5.5 ripple = pp d Dropout oltage I o = 00 ma Io = 500 ma I o = 800 ma 0 5 Thermal Regulation T a =25 o C 30ms Pulse %/W ELECTRICAL CHARACTERISTICS FOR LD7#28 (refer to the test circuits, Tj = 0 to 25 o C, Co =0µF unless otherwise specified) o Output oltage in = 4.85 I o =0mA T j =25 o C o Output oltage Io = 0 to 800 ma in = 4.25 to o Line Regulation in = 4.25 to 0 I o =0 ma 6 m o Load Regulation in = 4.25 I o =0to800mA 0 m o Temperature Stability 0. 5 % o Long Term Stability 000 hrs Tj = 25 o C 0.3 % in Operating Input oltage Io = 00 ma 5 I d Quiescent Current in ma I o Output Current in = 7.85 T j =25 o C ma en Output Noise oltage B = 0Hz to 0KHz Tj =25 o C 00 µ SR Supply oltage Rejection I o = 40 ma f = 20 Hz T j =25 o C db in = 5.85 ripple = pp d Dropout oltage Io = 00 ma I o = 500 ma Io = 800 ma 5 Thermal Regulation Ta =25 o C 30ms Pulse %/W 4/7

5 ELECTRICAL CHARACTERISTICS FOR LD7#30 (refer to the test circuits, T j = 0 to 25 o C, C o =0µF unless otherwise specified) o Output oltage in =5 Io =0mA Tj=25 o C o Output oltage Io = 0 to 800 ma in = 4.5 to o Line Regulation in = 4.5 to 2 Io = 0mA 6 m o Load Regulation in = 4.5 I o = 0 to 800 ma 0 m o Temperature Stability 0.5 % o Long Term Stability 000 hrs T j = 25 o C 0.3 % in Operating Input oltage I o = 00 ma 5 Id Quiescent Current in ma Io Output Current in =8 Tj =25 o C ma en Output Noise oltage B = 0Hz to 0KHz Tj =25 o C 00 µ SR Supply oltage Rejection Io = 40 ma f = 20 Hz Tj =25 o C db in =6 ripple = pp d Dropout oltage I o = 00 ma Io = 500 ma I o = 800 ma 5 Thermal Regulation T a =25 o C 30ms Pulse %/W ELECTRICAL CHARACTERISTICS FOR LD7#33 (refer to the test circuits, Tj = 0 to 25 o C, Co =0µF unless otherwise specified) o Output oltage in = 5.3 I o =0mA T j =25 o C o Output oltage Io = 0 to 800 ma in = 4.75 to o Line Regulation in = 4.75 to 5 I o =0 ma 6 m o Load Regulation in = 4.75 I o =0to800mA 0 m o Temperature Stability 0. 5 % o Long Term Stability 000 hrs Tj = 25 o C 0.3 % in Operating Input oltage Io = 00 ma 5 I d Quiescent Current in ma I o Output Current in = 8.3 T j =25 o C ma en Output Noise oltage B = 0Hz to 0KHz Tj =25 o C 00 µ SR Supply oltage Rejection I o = 40 ma f = 20 Hz T j =25 o C db in = 6.3 ripple = pp d Dropout oltage Io = 00 ma I o = 500 ma Io = 800 ma 5 Thermal Regulation Ta =25 o C 30ms Pulse %/W 5/7

6 ELECTRICAL CHARACTERISTICS FOR LD7#50 (refer to the test circuits, T j = 0 to 25 o C, C o =0µF unless otherwise specified) o Output oltage in =7 Io =0mA Tj=25 o C o Output oltage Io = 0 to 800 ma in = 6.5 to o Line Regulation in = 6.5 to 5 Io = 0 ma 0 m o Load Regulation in = 6.5 I o = 0 to 800 ma 5 m o Temperature Stability 0.5 % o Long Term Stability 000 hrs T j = 25 o C 0.3 % in Operating Input oltage I o = 00 ma 5 Id Quiescent Current in ma Io Output Current in =0 Tj =25 o C ma en Output Noise oltage B = 0Hz to 0KHz Tj =25 o C 00 µ SR Supply oltage Rejection Io = 40 ma f = 20 Hz Tj =25 o C db in =8 ripple = pp d Dropout oltage I o = 00 ma Io = 500 ma I o = 800 ma 5 Thermal Regulation T a =25 o C 30ms Pulse %/W ELECTRICAL CHARACTERISTICS FOR LD7(ADJUSTABLE) (refer to the test circuits, T j = 0 to 25 o C, C o =0µF unless otherwise specified) ref Reference oltage in -o =2 Io =0mA T j =25 o C ref Reference oltage Io = 0 to 800 ma in - o =.4 to o Line Regulation in - o =.5 to 3.75 I o = 0 ma % o Load Regulation in -o = 3 Io = 0 to 800 ma % o Temperature Stability 0.5 % o Long Term Stability 000 hrs Tj = 25 o C 0.3 % in Operating Input oltage 5 Iadj Adjustment Pin Current in µa Iadj Adjustment Pin Current Change in -o =.4 to 0 I o = 0 to 800 ma 5 µa I o(min) Minimum Load Current in =5 2 5 ma Io Output Current in -o =5 Tj =25 o C ma en Output Noise (% O ) B = 0Hz to 0KHz T j =25 o C % SR Supply oltage Rejection I o = 40 ma f = 20 Hz T j =25 o C db in - o =3 ripple = pp d Dropout oltage Io = 00 ma I o = 500 ma Io = 800 ma 5 Thermal Regulation Ta =25 o C 30ms Pulse %/W 6/7

7 ELECTRICAL CHARACTERISTICS FOR LD7#25C (refer to the test circuits, T j = 0 to 25 o C, C o =0µF unless otherwise specified) o Output oltage in = 4.5 Io =0mA Tj =25 o C o Output oltage Io = 0 to 800 ma in = 3.9 to o Line Regulation in = 3.9 to 0 Io = 0 ma 30 m o Load Regulation in = 3.9 I o = 0 to 800 ma 30 m o Temperature Stability 0.5 % o Long Term Stability 000 hrs T j = 25 o C 0.3 % in Operating Input oltage I o = 00 ma 5 Id Quiescent Current in ma Io Output Current in = 7.5 Tj =25 o C ma en Output Noise oltage B = 0Hz to 0KHz Tj =25 o C 00 µ SR Supply oltage Rejection Io = 40 ma f = 20 Hz Tj =25 o C db in = 5.5 ripple = pp d Dropout oltage I o = 00 ma Io = 500 ma I o = 800 ma 5 Thermal Regulation T a =25 o C 30ms Pulse %/W ELECTRICAL CHARACTERISTICS FOR LD7#30C (refer to the test circuits, Tj = 0 to 25 o C, Co =0µF unless otherwise specified) o Output oltage in =5 I o =0mA T j =25 o C o Output oltage Io = 0 to 800 ma in = 4.5 to o Line Regulation in = 4.5 to 2 I o = 0 ma 30 m o Load Regulation in = 4.5 I o = 0 to 800 ma 30 m o Temperature Stability 0. 5 % o Long Term Stability 000 hrs Tj = 25 o C 0.3 % in Operating Input oltage Io = 00 ma 5 I d Quiescent Current in ma I o Output Current in =8 T j =25 o C ma en Output Noise oltage B = 0Hz to 0KHz Tj =25 o C 00 µ SR Supply oltage Rejection I o = 40 ma f = 20 Hz T j =25 o C db in =6 ripple = pp d Dropout oltage Io = 00 ma I o = 500 ma Io = 800 ma 5 Thermal Regulation Ta =25 o C 30ms Pulse %/W 7/7

8 ELECTRICAL CHARACTERISTICS FOR LD7#33C (refer to the test circuits, T j = 0 to 25 o C, C o =0µF unless otherwise specified) o Output oltage in = 5.3 Io =0mA Tj =25 o C o Output oltage Io = 0 to 800 ma in = 4.75 to o Line Regulation in = 4.75 to 5 Io = 0 ma 30 m o Load Regulation in = 4.75 I o =0to800mA 30 m o Temperature Stability 0.5 % o Long Term Stability 000 hrs T j = 25 o C 0.3 % in Operating Input oltage I o = 00 ma 5 Id Quiescent Current in ma Io Output Current in = 8.3 Tj =25 o C ma en Output Noise oltage B = 0Hz to 0KHz Tj =25 o C 00 µ SR Supply oltage Rejection Io = 40 ma f = 20 Hz Tj =25 o C db in = 6.3 ripple = pp d Dropout oltage I o = 00 ma Io = 500 ma I o = 800 ma 5 Thermal Regulation T a =25 o C 30ms Pulse %/W ELECTRICAL CHARACTERISTICS FOR LD7#50C (refer to the test circuits, Tj = 0 to 25 o C, Co =0µF unless otherwise specified) o Output oltage in =7 I o =0mA T j =25 o C o Output oltage Io = 0 to 800 ma in = 6.5 to o Line Regulation in = 6.5 to 5 I o = 0 ma 50 m o Load Regulation in = 6.5 I o = 0 to 800 ma 50 m o Temperature Stability 0. 5 % o Long Term Stability 000 hrs Tj = 25 o C 0.3 % in Operating Input oltage Io = 00 ma 5 I d Quiescent Current in ma I o Output Current in =0 T j =25 o C ma en Output Noise oltage B = 0Hz to 0KHz Tj =25 o C 00 µ SR Supply oltage Rejection I o = 40 ma f = 20 Hz T j =25 o C db in =8 ripple = pp d Dropout oltage Io = 00 ma I o = 500 ma Io = 800 ma 5 Thermal Regulation Ta =25 o C 30ms Pulse %/W 8/7

9 TYPICAL APPLICATIONS: FIGURE : Negative Supply FIGURE 2: Active Terminator for SCSI-2 BUS FIGURE 3: Circuit for Increasing Output oltage 9/7

10 TYPICAL APPLICATIONS (continued): FIGURE 4: oltage Regulator With Reference FIGURE 5: Battery Backed-up Regulated Supply 0/7

11 TYPICAL APPLICATIONS (continued): FIGURE 6: Post-Regulated Dual Supply /7

12 LD7 ADJUSTABLE: APPLICATION NOTE The LD7 ADJUSTABLE has a thermal stabilized 5±0.02 reference voltage between the OUT and ADJ pins. I ADJ is 60µA typ. (20µA max.) and I ADJ is µa typ. (5µA max.). R is normally fixed to 20Ω. From figure 7 we obtain: OUT =REF +R2(IADJ +IR) =REF +R2 (IADJ +REF /R)=REF ( + R2 / R) + R2 x IADJ. In normal application R2 value is in the range of few Kohm, so the R2 x I DJ product could not be considered in the OUT calculation; then the above expression becomes: OUT = REF ( + R2 / R). In order to have the better load regulation it is important to realize a good Kelvin connection of R and R2 resistors. In particular R connection must be realized very close to OUT and ADJ pin, while R2 ground connection must be placed as near as possible to the negative Load pin. Ripple rejection can be improved by introducing a 0µF electrolitic capacitor placed in parallel to the R2 resistor (see Fig.8) FIGURE 7: Adjustable Output oltage Application Circuit FIGURE 8: Adjustable Output oltage Application with improved Ripple Rejection 2/7

13 SOT-223 MECHANICAL DATA DIM. mm mils MIN. TYP. MAX. MIN. TYP. MAX. a b c d e e f g l l L L l2 e b a d c e4 f C l B C E g P008B 3/7

14 SO-8 MECHANICAL DATA DIM. mm inch MIN. TYP. MAX. MIN. TYP. MAX. A a a a b b C c 45 (typ.) D E e e F L M S 8 (max.) /7

15 TO-252 (DPAK) MECHANICAL DATA DIM. mm inch MIN. TYP. MAX. MIN. TYP. MAX. A A A B B C C D E G H L L H L2 D E = = B2 = = 2 3 G = = C2 B A DETAIL A C A A2 DETAIL A L B 5/7

16 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 D F G C D A E L2 G H2 F Dia. L5 L7 L9 F2 L6 L4 P0C 6/7

17 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 foruse as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. 998 SGS-THOMSON Microelectronics - Printed in Italy - AllRights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 7/7

LD1117A SERIES LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS

LD1117A SERIES LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS LOW DROPOUT VOLTAGE (1.15V TYP. @ I OUT =1A,25 C) VERY LOW QUIESCENT CURRENT (5 ma TYP. @ 25 C) OUTPUT CURRENT UP TO 1A FIXED OUTPUT