L7900 SERIES NEGATIVE VOLTAGE REGULATORS

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1 L7900 SERIES NEGATIVE VOLTAGE REGULATORS OUTPUT CURRENT UP TO 1.5 A OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -9; -12; -15; -18; -20; -22; -24V THERMAL OVERLOAD PROTECTION SHORT CIRCUIT PROTECTION OUTPUT TRANSITION SOA PROTECTION DESCRIPTION The L7900 series of three-terminal negative regulators is available in TO-220, ISOWATT220 TO-3 and D 2 PAK packages and several fixed output voltages, making it useful in a wide range of applications.these regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation; furthermore, having the same voltage option as the L7800 positive standard series, they are particularly suited for split power supplies. In addition, the -5.2V is also available for ECL system. If adequate heat sinking is provided, they can deliver over 1.5A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. 1 2 TO-3 TO D 2 PAK ISOWATT SCHEMATIC DIAGRAM November /13

2 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V i DC Input Voltage (for V O = 5 to 18V) (for V O = 20, 24V) I o Output Current Internally limited P tot Power Dissipation Internally limited T op Operating Junction Temperature Range 0 to 150 T stg Storage Temperature Range - 65 to V V o C o C THERMAL DATA Symbol Parameter D 2 PAK TO-220 ISOWATT220 TO-3 Unit R thj-case Thermal Resistance Junction-case Max o C/W R thj-amb Thermal Resistance Junction-ambient Max o C/W CONNECTION DIAGRAM AND ORDERING NUMBERS (top view) TO-220 & ISOWATT 220 D 2 PAK TO-3 Type TO-220 D 2 PAK (*) ISOWATT220 TO-3 Output Voltage L7905C L7952C L7906C L7908C L7912C L7915C L7918C L7920C L7922C L7924C L7905CV L7952CV L7906CV L7908CV L7912CV L7915CV L7918CV L7920CV L7922CV L7924CV L7905CD2T L7952CD2T L7906CD2T L7908CD2T L7912CD2T L7915CD2T L7918CD2T L7920CD2T L7922CD2T L7924CD2T L7905CP L7906CP L7908CP L7912CP L7915CP L7918CP L7920CP L7924CP L7905CT L7952CT L7906CT L7908CT L7912CT L7915CT L7918CT L7920CT L7922CT L7924CT -5V -5.2V -6V -8V -12V -15V -18V -20V -22V -24V (*) AVAILABLE IN TAPE AND REEL WITH -TR SUFFIX APPLICATION CIRCUIT 2/13

3 ELECTRICAL CHARACTERISTICS FOR L7905C (refer to the test circuits, Tj = 0 to 150 o C, V i = -10V, I o = 500 ma, C i = 2.2 µf, C o =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi = 8 to 20 V * Line Regulation V i =-7to-25V T j =25 o C 100 mv V i =-8to-12V T j =25 o C 50 mv Vo* Load Regulation Io = 5 to 1500 ma Tj =25 o C 100 mv 50 mv I d Quiescent Current Change V i =-8to-25V 1.3 ma Output Voltage Drift I o = 5 ma -0.4 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 100 µv SVR Supply Voltage Rejection Vi =10 V f= 120Hz db 1.4 V Isc Short Circuit Current 2.1 A I scp Short Circuit Peak Current T j =25 o C 2.5 A ELECTRICAL CHARACTERISTICS FOR L7952C (refer to the test circuits, T j = 0 to 150 o C, Vi = -10V, Io = 500 ma, Ci = 2.2 µf, Co =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi =-9to-21V Vo* Line Regulation Vi =-8to-25V Tj=25 o C 105 mv V i =-9to-12V T j =25 o C 52 mv * Load Regulation I o = 5 to 1500 ma T j =25 o C 105 mv 52 mv I d Quiescent Current Change V i =-9to-25V 1.3 ma Output Voltage Drift I o = 5 ma -0.5 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 125 µv SVR Supply Voltage Rejection V i = 10 V f = 120Hz db 1.4 V I sc Short Circuit Current 2 A I scp Short Circuit Peak Current T j =25 o C 2.5 A * Load and line regulation are specified at constant junction temperature. Changes in V o due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used. 3/13

4 ELECTRICAL CHARACTERISTICS FOR L7906C (refer to the test circuits, Tj = 0 to 150 o C, V i = -11V, I o = 500 ma, C i = 2.2 µf, C o =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi = -9.5 to V * Line Regulation V i = -8.5 to -25 V T j =25 o C 120 mv V i =-9to-15V T j =25 o C 60 mv Vo* Load Regulation Io = 5 to 1500 ma Tj =25 o C 120 mv 60 mv I d Quiescent Current Change V i = -9.5 to -25 V 1.3 ma Output Voltage Drift I o = 5 ma -0.6 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 144 µv SVR Supply Voltage Rejection Vi =10 V f= 120Hz db 1.4 V Isc Short Circuit Current 2 A I scp Short Circuit Peak Current T j =25 o C 2.5 A ELECTRICAL CHARACTERISTICS FOR L7908C (refer to the test circuits, T j = 0 to 150 o C, Vi = -14V, Io = 500 ma, Ci = 2.2 µf, Co =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi = to -23 V Vo* Line Regulation Vi = to -25 V Tj =25 o C 160 mv V i = -11 to -17 V T j =25 o C 80 mv * Load Regulation I o = 5 to 1500 ma T j =25 o C 160 mv 80 mv I d Quiescent Current Change V i = to -25 V 1.3 ma Output Voltage Drift I o = 5 ma -0.6 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 175 µv SVR Supply Voltage Rejection V i = 10 V f = 120Hz db I sc Short Circuit Current 1.5 A I scp Short Circuit Peak Current T j =25 o C 2.5 A * Load and line regulation are specified at constant junction temperature. Changes in V o due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used. 4/13

5 ELECTRICAL CHARACTERISTICS FOR L7912C (refer to the test circuits, Tj = 0 to 150 o C, V i = -19V, I o = 500 ma, C i = 2.2 µf, C o =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi = to -27 V * Line Regulation V i = to -30 V T j =25 o C 240 mv V i = -16 to -22 V T j =25 o C 120 mv Vo* Load Regulation Io = 5 to 1500 ma Tj =25 o C 240 mv 120 mv I d Quiescent Current Change V i = -15 to -30 V 1 ma Output Voltage Drift I o = 5 ma -0.8 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 200 µv SVR Supply Voltage Rejection Vi =10 V f= 120Hz db Isc Short Circuit Current 1.5 A I scp Short Circuit Peak Current T j =25 o C 2.5 A ELECTRICAL CHARACTERISTICS FOR L7915C (refer to the test circuits, T j = 0 to 150 o C, Vi = -23V, Io = 500 ma, Ci = 2.2 µf, Co =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi = to -30 V Vo* Line Regulation Vi = to -30 V Tj =25 o C 300 mv V i = -20 to -26 V T j =25 o C 150 mv * Load Regulation I o = 5 to 1500 ma T j =25 o C 300 mv 150 mv I d Quiescent Current Change V i = to -30 V 1 ma Output Voltage Drift I o = 5 ma -0.9 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 250 µv SVR Supply Voltage Rejection V i = 10 V f = 120Hz db I sc Short Circuit Current 1.3 A I scp Short Circuit Peak Current T j =25 o C 2.2 A * Load and line regulation are specified at constant junction temperature. Changes in V o due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used. 5/13

6 ELECTRICAL CHARACTERISTICS FOR L7918C (refer to the test circuits, Tj = 0 to 150 o C, V i = -27V, I o = 500 ma, C i = 2.2 µf, C o =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi = -22 to -33 V * Line Regulation V i = -21 to -33 V T j =25 o C 360 mv V i = -24 to -30 V T j =25 o C 180 mv Vo* Load Regulation Io = 5 to 1500 ma Tj =25 o C 360 mv 180 mv I d Quiescent Current Change V i = -22 to -33 V 1 ma Output Voltage Drift I o = 5 ma -1 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 300 µv SVR Supply Voltage Rejection Vi =10 V f= 120Hz db Isc Short Circuit Current 1.1 A I scp Short Circuit Peak Current T j =25 o C 2.2 A ELECTRICAL CHARACTERISTICS FOR L7920C (refer to the test circuits, T j = 0 to 150 o C, Vi = -29V, Io = 500 ma, Ci = 2.2 µf, Co =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi = -24 to -35 V Vo* Line Regulation Vi = -23 to -35 V Tj =25 o C 400 mv V i = -26 to -32 V T j =25 o C 200 mv * Load Regulation I o = 5 to 1500 ma T j =25 o C 400 mv 200 mv I d Quiescent Current Change V i = -24 to -35 V 1 ma Output Voltage Drift I o = 5 ma -1.1 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 350 µv SVR Supply Voltage Rejection V i = 10 V f = 120Hz db I sc Short Circuit Current 0.9 A I scp Short Circuit Peak Current T j =25 o C 2.5 A * Load and line regulation are specified at constant junction temperature. Changes in V o due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used. 6/13

7 ELECTRICAL CHARACTERISTICS FOR L7922C (refer to the test circuits, Tj = 0 to 150 o C, V i = -31V, I o = 500 ma, C i = 2.2 µf, C o =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi = -26 to -37 V * Line Regulation V i = -25 to -37 V T j =25 o C 440 mv V i = -28 to -34 V T j =25 o C 220 mv Vo* Load Regulation Io = 5 to 1500 ma Tj =25 o C 440 mv 220 mv I d Quiescent Current Change V i = -26 to -37 V 1 ma Output Voltage Drift I o = 5 ma -1.1 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 375 µv SVR Supply Voltage Rejection Vi =10 V f= 120Hz db Isc Short Circuit Current 1.1 A I scp Short Circuit Peak Current T j =25 o C 2.2 A ELECTRICAL CHARACTERISTICS FOR L7924C (refer to the test circuits, T j = 0 to 150 o C, Vi = -33V, Io = 500 ma, Ci = 2.2 µf, Co =1µF unless otherwise specified) V o Output Voltage T j =25 o C V V o Output Voltage I o =-5mAto-1A P o 15 W V Vi = -27 to -38 V Vo* Line Regulation Vi = -27 to -38 V Tj =25 o C 480 mv V i = -30 to -36 V T j =25 o C 240 mv * Load Regulation I o = 5 to 1500 ma T j =25 o C 480 mv 240 mv I d Quiescent Current Change V i = -27 to -38 V 1 ma Output Voltage Drift I o = 5 ma -1 mv/ o C e N Output Noise Voltage B = 10Hz to 100KHz T j =25 o C 400 µv SVR Supply Voltage Rejection V i = 10 V f = 120Hz db I sc Short Circuit Current 1.1 A I scp Short Circuit Peak Current T j =25 o C 2.2 A * Load and line regulation are specified at constant junction temperature. Changes in V o due to heating effects must be taken into account separately. Pulce testing with low duty cycle is used. 7/13

8 APPLICATION INFORMATION Figure 1 : Fixed Output Regulator. Figure 2 : Split Power Supply (± 15V/1A). Notes : 1. To specify an output voltage, substitute voltage value for XX. 2. Required for stability. For value given, capacitor must be solid tantalum. If aluminium electrolitics are used, at least ten times value should be selected. C 1 is required if regulator is located an appreciable distance from power supply filter. 3. To improve transient response. If large capacitors are used, a high current diode from input to output (1N4001 or similar) should be introduced to protect the device from momentary input short circuit. Against potential latch-up problems. Figure 3 : Circuit for Increasing Output Voltage. Figure 4 : High Current Negative Regulator ( 5V/4A with 5A current limiting). V O = V XX R 1 + R 2 R 2 V XX > 3I d R 2 C3 Optional for improved transient response and ripple rejection. Figure 5 : Typical ECL System Power Supply ( 5.2V/4A). Optional dropping resistor to reduce the power dissipated in the boost transistor. 8/13

9 TO-3 (R) MECHANICAL DATA DIM. mm inch MIN. TYP. MAX. MIN. TYP. MAX. A B C D E G N P R U V P A D G C N O U V B E R P003N 9/13

10 TO-220 MECHANICAL DATA DIM. mm inch MIN. TYP. MAX. MIN. TYP. MAX. A C D D E F F G H H L L L L L Dia P011D 10/13

11 ISOWATT220 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 Ø H G B D A E L6 L7 L3 F1 F F2 G L2 L4 P011G 11/13

12 TO-263 (D 2 PAK) MECHANICAL DATA DIM. mm inch MIN. TYP. MAX. MIN. TYP. MAX. A A B B C C D E G L L L D A C2 DETAIL A C A2 DETAIL A A1 B2 B E G L2 L L3 P011P6/F 12/13

13 Information furnished isbelieved 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. Specification mentioned in this publication are subject to change without notice. Thispublication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 1999 STMicroelectronics Printed in Italy All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. 13/13

L79xxC. Negative voltage regulators. Features. Description

L79xxC. Negative voltage regulators. Features. Description Negative voltage regulators Features Output current up to 1.5 A Output voltages of -5; -8; -12; -15; -20 V Thermal overload protection Short circuit protection Output transition SOA protection Description