ST L7900AC SERIES handbook
Contents
1. Output Noise Voltage 10Hz to 100KHz Tj 25 C _ 75 fw Supply Voltage Rejection AVi 10V 1 gt 120 2 Va Dropout Voltage lo 1A Tj 25 C AVo 100 mV Short Circuit Peak Current 25 ELECTRICAL CHARACTERISTICS FOR 7924 refer to the test circuits Tj 0 to 125 C Vi 33V lo 500 mA Ci 2 2 uF Co 1 uF unless specified Tj 25 C Output Voltage 7 5mAto 1A Po lt 15W 27 to 38 V Line Regulation Vie 27 t0 38 V 25 Vi 30 to 36 V 25 C lo 250 to 750 mA Toa C aes Output Noise Voltage 10Hzto 100KHz Tj 25 C Supply Voltage Rejection JAVi 10V f 120Hz 9 1 10 f 120Hz 9 V 1 12012 Va Dropout Voltage lo 1A T 25 C 100 mV Short Circuit Current Short Circuit Peak Current 25 Load and line regulation are specified at constant junction temperature Changes in Vo due to heating effects must be taken into account separately Pulce testing with low duty cycle is used SZA 7 11 L7900AC APPLICATION INFORMATION Figure 1 Fixed Output Regulator Figure 2 Split Power Supply 15V 1A 5 5036 Notes Against potential latch up problems 1 To specify an output voltage substitute voltage value for XX 2 Required for stability For value given capacitor must be solid tantalum If aluminium2. O L7200Ac 7900 Y SERIES 2 NEGATIVE VOLTAGE REGULATORS a OUTPUT CURRENT UP 1 5 a OUTPUT VOLTAGESOF 5 5 2 6 8 12 15 18 20 24V THERMAL OVERLOAD PROTECTION a SHORT CIRCUIT PROTECTION OUTPUT TRANSITION SOA PROTECTION DESCRIPTION The L7900AC series of three terminal negative regulators is available in TO 220 and D PAK packages and several fixed output voltages 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 L7800A 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 SCHEMATIC DIAGRAM November 1999 1 11 L7900AC ABSOLUTE MAXIMUM RATINGS symbol Parmer O O 8 Vi DC Input Voltage for Vo 5 to 18V 35 V for Vo 20 24V 40 V l Output Current Internally limited Power Dissipation Internally limited Operating Junction Temperature Range 0 to 125 Storage Temperature Range 65 to 150 DATA Symbol Parameter Pra TO 220 Unit
3. Output Noise Voltage 10Hz to 100KHz 25 C e fw Supply Voltage Rejection AVi 10V 1 gt 120 2 Va Dropout Voltage lo 1A T 25 C AVo 100 mV Short Circuit Peak Current 25 ELECTRICAL CHARACTERISTICS FOR L7915A refer to the test circuits Tj 0 to 125 C Vi 23V lo 500 mA Ci 2 2 uF Co 1 uF unless specified 8 9811 Tye Output Voltage lo 5mAto 1A P lt 15W 14 4 15 15 6 Vi 18 5 to 30 V Line Regulation o 30V Tj 25 C 20 to 26 V 25 C lo 250 to 750 mA 25 C ma a as cac gt gt Output Noise Voltage 10Hz to 100KHz Tj 25 C Supply Voltage Rejection 10 f 120Hz 0 1 10 f 120Hz 0 V f 120Hz Va Dropout Voltage 1 T 25 C 100 mV Short Circuit Current Short Circuit Peak Current 25 Load and line regulation are specified at constant junction temperature Changes in Vo due to heating effects must be taken into account separately Pulce testing with low duty cycle is used STA 5 11 L7900AC veoh ae CHARACTERISTICS FOR L7918A refer to the test circuits Tj 0 to 125 C 27V lo 500 mA Ci 2 2 uF Co 1 uF unless Oene specified rmbt reer i Ton 88 Output Voltage 8 5mAto 1A P lt 15W 17 3 18 18 7 V 22 to 33 V Line Regulation v 21 t0 33 V Tj 25 C 360 mV 24t0 30V Tj 25 C 180 mV AVo Load Regul
4. te 8 0 1 1 1 ELECTRICAL CHARACTERISTICS FOR 7908 refer to the test circuits Tj 0 to 125 C Vi 14V lo 500 mA Ci 2 2 uF Co 1 uF unless ve Output Voltage Tj 25 C Output Voltage 0 5 10 1 P lt 15W Vi 11 5 to 23 V Line Regulation Vi 10 5to 25V Tj 25 C Vi 11 to 17 V 25 C lo 250 to 750 mA Toa C ea Output Noise Voltage 10Hzto 100KHz Tj 25 C H Supply Voltage Rejection 10 120 2 0 1 10 f 120Hz 0 V f 120Hz Va Dropout Voltage 1 T 25 C 100 mV Short Circuit Current Short Circuit Peak Current 25 Load and line regulation are specified at constant junction temperature Changes in Vo due to heating effects must be taken into account separately Pulce testing with low duty cycle is used 4 11 ky L7900AC ELECTRICAL CHARACTERISTICS FOR L7912A refer to the test circuits Tj 0 to 125 C Vi 19V lo 500 mA Ci 2 2 uF Co 1 uF unless Oene specified Ye ouput 8 Tj 25 C 11 75 11 75 Output Voltage l 5mAto 1A Po lt 15W 11 5 12 12 5 Vi 15 5 to 27 V Line Regulation Vi 14 5t0 30V Tj 25 C 240 mV Vi 16 to 22 V Tj 25 C 120 mV Load Regulation lo 5to1500mA 25 240 6 25016 750 Tj 25 C 120 mV a 35 551696 E
5. Rthj case Thermal Resistance Junction case Max C W Rthj amb Thermal Resistance Junction ambient Max a 5 gt C W CONNECTION DIAGRAM AND ORDERING NUMBERS top view CZ gt oureut OUTPUT L T INPUT INPUT end PC11970 connected to pin 3 5 5033 1 TO 220 D PAK TO 220 D PAK Supa L7905AC L7905ACV L7905ACD2T L7952AC L7952ACV L7952ACD2T L7906AC L7906ACV L7906ACD2T L7908AC L7908ACV L7908ACD2T L7912AC L7912ACV L7912ACD2T L7915AC L7915ACV L7915ACD2T L7918AC L7918ACV L7918ACD2T L7920AC L7920ACV L7920ACD2T L7922AC L7922ACV L7922ACD2T L7924AC L7924ACV L7924ACD2T AVAILABLE IN TAPE AND REEL WITH TR SUFFIX APPLICATION CIRCUIT 5 5036 1 2 11 L7900AC ELECTRICAL CHARACTERISTICS FOR L7905A refer to the test circuits Tj 0 to 125 C Vi 10V lo 500 mA Ci 2 2 uF Co 1 uF unless OENE specified Output Voltage a 5mAto 1A P lt 15W 4 8 8to20V Line Regulation lt 7t0 25V Tj 25 C Vi 8to 12V Tj 25 C ae on Psi fv et AVo Load Regulation lo 5to1500mA 25 100 lo 25010 750 25 50 Quiescent Current Change lo 5 to 1000 mA 05 Output Noise Voltage 10Hz to 100KHz Tj 25 C _ wo fw Supply Voltage Rejection AVi 10V 1 gt 120 2 Va Dropout Voltage lo 1A T 25 C AVo 100 mV Short Circuit Peak Current 25 ELECTR
6. ICAL CHARACTERISTICS FOR 7952 refer to the test circuits Tj 0 to 125 C Vi 10V lo 500 mA Ci 2 2 uF Co 1 uF unless eine iMisS paged ve Output Voltage Tj 25 C 5 3 4 2 2 Output Voltage 0 5 10 1 P lt 15W 5 2 5 Vi 9 to 21 V Line Regulation Vi 8to 25V Tj 25 C 105 Vi 9to 13V Tj 25 C 5 lo 5016 750mMA Tj 25 C 5 a a Output Noise Voltage 10Hz to 100KHz Tj 25 C Supply Voltage Rejection 10 f 120Hz 0 1 10 f 120Hz 0 V f 120Hz Va Dropout Voltage 1 T 25 C 100 mV Short Circuit Current Short Circuit Peak Current 25 Load and line regulation are specified at constant junction temperature Changes in Vo due to heating effects must be taken into account separately Pulce testing with low duty cycle is used ky 3 11 L7900AC ELECTRICAL CHARACTERISTICS FOR L7906A refer to the test circuits Tj 0 to 125 C Vi 11V lo 500 mA Cj 2 2 uF Co 1 uF unless OENE specified E Output Voltage Tj 25 C Output Voltage lo 5mAto 1A Po lt 15W Vi 9 5 to 21 5 V Line Regulation Vi 8 5t0 25V Tj 25 C Vi 9t0 15V 25 6 AVo Load Regulation lo 5t01500mA Tj 25 C lo 250160 750 Tj 25 C la Quiescent Current Tj 25 C Ala Quiescent Current Change lo 5 to 1000 mA ee EA o a ae ae LW Va Dropout Voltage lo 1A T 25 C 1 4 AVo 100 mV
7. ation lo 5t01500mA Tj 25 C 360 mV lo 250t0750mA Tj 25 C 180 mV e E S EA E N Output Noise Voltage 10Hz to 100KHz 25 C _ soo fw Supply Voltage Rejection AVi 10V 1 gt 120 2 Va Dropout Voltage lo 1A Tj 25 C AVo 100 mV Short Circuit Peak Current 25 ELECTRICAL CHARACTERISTICS FOR 7920 refer to the test circuits Tj 0 to 125 C Vi 29V lo 500 mA Ci 2 2 uF Co 1 uF unless specified ae Output Voltage Tj 25 C Output Voltage 1 5mAto 1A P lt 15W 24 to 35 V Line Regulation 23t0 35 V Tj 25 C 26 to 32 V 25 C lo 250 to 750 mA Toas C a Sv Sip 96 89992 999 rete eo a Va Dropout Voltage 1 T 25 C 1 AVo 100 mV Short Circuit Current Short Circuit Peak Current Tj 25 C Load and line regulation are specified at constant junction temperature Changes in Vo due to heating effects must be taken into account separately Pulce testing with low duty cycle is used 6 11 ISA L7900AC 1 CHARACTERISTICS FOR L7922A refer to the test circuits Tj 0 to 125 C 31V lo 500 mA Ci 2 2 uF Co 1 uF unless Oene specified E Output Voltage Tj 25 C 21 5 21 5 Output Voltage lo 5mAto 1A Po lt 15W Vi 26 to 37 V Line Regulation 25t0 37 V Tj 25 C 28t0 34V Tj 25 C 516 1500 25 250t0750mA 25 0 SN 566
8. croelectronics 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 http www st com 11 11
9. electrolitics are used at least ten times value should be selected C4 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 Figure 3 Circuit for Increasing Output Voltage Figure 4 High Current Negative Regulator 5V 4A with 5A current limiting 5 5039 C3 Optional for improved transient response and ripple rejection Figure 5 Typical ECL System Power Supply 5 2V 4A 5 50 06 Optional dropping resistor to reduce the power dissipated in the boost transistor 8 11 x L7900AC TO 220 MECHANICAL DATA 9 11 7 L7900AC TO 263 D PAK MECHANICAL DATA DETAIL A DETAIL A P011P6 F 10 11 L7900AC 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 Specification mentioned in this publication are subject to change without notice This publication supersedes and replaces all information previously supplied STMi
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ST L7900AC SERIES handbook