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KA79XX / KA79XXA / LM79XX 3-Terminal 1 A Negative Voltage Regulator Features Description * Output Current in Excess of 1 A * Output Voltages of: -5 V, -6 V, -8 V, -9 V, -12 V, -15 V, -18 V, -24 V * Internal Thermal Overload Protection * Short-Circuit Protection * Output Transistor Safe Operating Area Compensation The KA79XX / KA79XXA / LM79XX series of three-terminal negative regulators are available in a TO-220 package with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shutdown, and safe operating area protection. TO-220 Input 1 1. GND 2. Input 3. Output Ordering Information Product Number Output Voltage Tolerance Package Packing Method Operating Temperature Rail 0 to +125C KA7905TU KA7906TU KA7908TU KA7909TU KA7912TU 4% TO-220 (Dual Gauge) KA7915TU KA7918TU KA7924TU KA7912ATU KA7915ATU 2% LM7905CT LM7908CT LM7909CT LM7910CT 4% TO-220 (Single Gauge) LM7912CT LM7915CT LM7918CT (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator September 2014 GND R1 VOLTAGE REFERENCE R2 Out Output + Q1 Q2 I1 PROTECTION CIRCUITRY I2 Rsc In Input Figure 1. Block Diagram Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Values are at TA = 25C unless otherwise noted. Symbol VI Parameter Value Input Voltage Unit -35 V RJC Thermal Resistance, Junction-Case(1) 5 C/W RJA Thermal Resistance, Junction-Air(1, 2) 65 C/W TOPR Operating Temperature Range 0 to +125 C TSTG Storage Temperature Range - 65 to +150 C Notes: 1. Thermal resistance test board, size: 76.2 mm x 114.3 mm x 1.6 mm(1S0P), JEDEC standard: JESD51-3, JESD51-7. 2. Assume no ambient airflow. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 2 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Block Diagram (VI = -10 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO = 1 F; unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. Unit TJ = +25C -4.80 -5.00 -5.20 Output Voltage IO = 5 mA to 1 A, PO 15 W, VI = -7 V to -20 V -4.75 -5.00 -5.25 VO Line Regulation(3) TJ = +25C VI = -7 V to -25 V 35 100 VI = -8 V to -12 V 8 50 VO Load Regulation(3) TJ = +25C, IO = 5 mA to 1.5 A 10 100 TJ = +25C, IO = 250 mA to 750 mA 3 50 IQ Quiescent Current TJ = +25C 3 6 IQ Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -8 V to -25 V 0.10 0.80 IO = 5 mA -0.4 mV/C 40 V 60 dB 2 V VO Vo/T Temperature Coefficient of VD V mV mV mA mA VN Output Noise Voltage f = 10 Hz to 100 kHz, TA = +25C RR Ripple Rejection f = 120 Hz, VI = 10 V VD Dropout Voltage TJ = +25C, IO = 1 A ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A 54 Note: 3. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 3 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7905 / LM7905) (VI = -11 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO = 1 F; unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. Unit TJ = +25C -5.75 -6.00 -6.25 Output Voltage IO = 5 mA to 1 A, PO 15 W, VI = -9 V to -21 V -5.70 -6.00 -6.30 VO Line Regulation(4) TJ = +25C VI = -8 V to -25 V 10 120 VI = -9 V to -13 V 5 60 VO Load Regulation(4) TJ = +25C, IO = 5 mA to 1.5 A 10 120 TJ = +25C, IO = 250 mA to 750 mA 3 60 IQ Quiescent Current TJ = +25C 3 6 IQ Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -8 V to -25 V 0.10 1.30 IO = 5 mA -0.5 mV/C 130 V 60 dB 2 V VO Vo/T Temperature Coefficient of VD V mV mV mA mA VN Output Noise Voltage f = 10 Hz to 100 kHz, TA =+25C RR Ripple Rejection f = 120 Hz, VI = 10 V VD Dropout Voltage TJ = +25C, IO = 1 A ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A 54 Note: 4. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 4 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7906) (VI = -14 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO =1 F; unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. Unit TJ = +25C -7.7 -8.0 -8.3 Output Voltage IO = 5 mA to 1 A, PO 15 W, VI = -10 V to -23 V -7.6 -8.0 -8.4 VO Line Regulation(5) TJ = +25C VI = -10.5 V to -25 V 10 160 VI = -11 V to -17 V 5 80 VO Load Regulation(5) TJ = +25C, IO = 5 mA to 1.5 A 12 160 TJ = +25C, IO = 250 mA to 750 mA 4 80 IQ Quiescent Current TJ = +25C 3 6 IQ Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -10.5 V to -25 V 0.10 1.00 IO = 5 mA -0.6 mV/C 175 V 60 dB 2 V VO Vo/T Temperature Coefficient of VD V mV mV mA mA VN Output Noise Voltage f = 10 Hz to 100 kHz, TA = +25C RR Ripple Rejection f = 120 Hz, VI = 10 V VD Dropout Voltage TJ = +25C, IO = 1 A ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A 54 Note: 5. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 5 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7908 / LM7908) (VI = -15 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO =1 F; unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. Unit TJ = +25C -8.7 -9.0 -9.3 Output Voltage IO = 5 mA to 1 A, PO 15 W, VI = -1.5 V to -23 V -8.6 -9.0 -9.4 VO Line Regulation(6) TJ = +25C VI = -11.5 V to -26 V 10 180 VI = -12 V to -18 V 5 90 VO Load Regulation(6) TJ = +25C, IO = 5 mA to 1.5 A 12 180 TJ = +25C, IO = 250 mA to 750 mA 4 90 IQ Quiescent Current TJ = +25C 3 6 IQ Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -11.5 V to -26 V 0.10 1.00 Temperature Coefficient of VD IO = 5 mA -0.6 mV/C 175 V 60 dB 2 V VO Vo/T V mV mV mA mA VN Output Noise Voltage f = 10 Hz to 100 kHz, TA = +25C RR Ripple Rejection f = 120 Hz, VI = 10 V VD Dropout Voltage TJ = +25C, IO = 1 A ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A 54 Note: 6. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 6 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7909 / LM7909) (VI = -17 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO =1 F; unless otherwise specified.) Symbol VO VO VO IQ IQ Vo/T VN Parameter Conditions Min. Typ. Max. TJ = +25C -9.6 -10.0 -10.4 Output Voltage IO = 5 mA to 1A, Pd 15 W, VI = -12 V to -28 V -9.5 -10.0 -10.5 Line Regulation(7) TJ = +25C VI = -12.5 V to -28 V 12 200 VI = -14 V to -20 V 6 100 TJ = +25C, IO = 5 mA to 1.5 A 12 200 TJ = +25C, IO = 250 mA to 750 mA 4 Load Regulation(7) TJ = +25C 3 6 Quiescent Current Change 0.05 0.50 VI = -12.5 V to -28 V 0.10 1.00 Output Noise Voltage 10 Hz f 100 kHz, TA = +25C mV 100 IO = 5 mA to 1 A IO = 5 mA V mV Quiescent Current Temperature Coefficient of VO Unit mA mA -1 mV/C 280 V 60 dB 2 V RR Ripple Rejection f = 120 Hz, VI = 10 V VD Dropout Voltage TJ = +25C, IO = 1 A ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A 54 Note: 7. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 7 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (LM7910) (VI = -19 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO = 1 F; unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. TJ = +25C -11.5 -12.0 -12.5 Output Voltage IO = 5 mA to 1 A, PO 15 W VI = -15.5 V to -27 V -11.4 -12.0 -12.6 VO Line Regulation(8) TJ = +25C VO Load Regulation(8) IQ IQ VO Vo/T Unit V VI = -14.5 V to -30 V 12 240 VI = -16 V to -22 V 6 120 TJ = +25C, IO = 5 mA to 1.5 A 12 240 TJ = +25C, IO = 250 mA to 750 mA 4 120 Quiescent Current TJ = +25C 3 6 Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -14.5 V to -30 V 0.10 1.00 IO = 5 mA -0.8 mV/C 200 V 60 dB 2 V Temperature Coefficient of VD mV mV mA mA VN Output Noise Voltage f = 10 Hz to 100 kHz, TA = +25C RR Ripple Rejection f = 120 Hz, VI = 10 V VD Dropout Voltage TJ = +25C, IO = 1 A ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A 54 Note: 8. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 8 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7912 / LM7912) (VI = -23 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO = 1 F; unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. Unit TJ = +25C -14.40 -15.00 -15.60 Output Voltage IO = 5 mA to 1 A, PO 15 W VI = -18 V to -30 V -14.25 -15.00 -15.75 VO Line Regulation(9) TJ = +25C VI = -17.5 V to -30 V 12 300 VI = -20 V to -26 V 6 150 VO Load Regulation(9) TJ = +25C, IO = 5 mA to 1.5 A 12 300 TJ = +25C, IO = 250 mA to 750 mA 4 150 IQ Quiescent Current TJ = +25C 3 6 IQ Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -17.5 V to -30 V 0.10 1.00 Temperature Coefficient of VD IO = 5 mA -0.9 mV/C 250 V 60 dB 2 V VO Vo/T V mV mV mA mA VN Output Noise Voltage f = 10 Hz to 100 kHz, TA = +25C RR Ripple Rejection f = 120 Hz, VI = 10 V VD Dropout Voltage TJ = +25C, IO = 1 A ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A 54 Note: 9. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 9 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7915 / LM7915) (VI = -27 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO =1 F, unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. TJ = +25C -17.3 -18.0 -18.7 Output Voltage IO = 5 mA to 1 A, PO 15 W VI = -22.5 V to -33 V -17.1 -18.0 -18.9 VO Line Regulation(10) TJ = +25C VI = -21 V to -33 V 15 360 VI = -24 V to -30 V 8 180 VO Load Regulation(10) TJ = +25C, IO = 5 mA to 1.5 A 15 360 TJ = +25C, IO = 250 mA to 750 mA 5 180 IQ Quiescent Current TJ = +25C 3 6 IQ Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -21 V to -33 V 0.10 1.00 VO Vo/T Temperature Coefficient of VD IO = 5 mA Unit V mV mV mA mA -1 mV/C 300 V 60 dB 2 V VN Output Noise Voltage f = 10 Hz to 100 kHz, TA = +25C RR Ripple Rejection f = 120 Hz, VI = 10 V VD Dropout Voltage TJ = +25C, IO = 1 A ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A 54 Note: 10. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 10 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7918 / LM7918) (VI = -33 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO = 1 F; unless otherwise specified.) Symbol Parameter Conditions Min. Typ. Max. TJ = +25C -23.0 -24.0 -25.0 Output Voltage IO = 5 mA to 1 A, PO 15 W, VI = -27 V to -38 V -22.8 -24.0 -25.2 VO Line Regulation(11) TJ = +25C VO Load Regulation(11) IQ IQ VO Vo/T VI = -27 V to -38 V 15 480 VI = -30 V to -36 V 8 180 TJ = +25C, IO = 5 mA to 1.5 A 15 480 TJ = +25C, IO = 250 mA to 750 mA 5 240 Quiescent Current TJ = +25C 3 6 Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -27 V to -38 V 0.10 1.00 Temperature Coefficient of VD IO = 5 mA Unit V mV mV mA mA -1 mV/C 400 V 60 dB 2 V VN Output Noise Voltage f = 10 Hz to 100 kHz, TA = +25C RR Ripple Rejection f = 120 Hz, VI = 10 V VD Dropout Voltage TJ = +25C, IO = 1 A ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A 54 Note: 11. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 11 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7924) (VI = -19 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO =1 F; unless otherwise specified.) Symbol VO Parameter Output Voltage Conditions Min. Typ. Max. TJ = +25C -11.75 -12.00 -12.25 IO = 5 mA to 1 A, PO 15 W, VI = -15.5 V to -27 V -11.50 -12.00 -12.50 VI = -14.5 V to -27 V, Io = 1 A 12 120 VI= -16 V to -22 V, Io = 1 A 6 60 VI = -14.8 V to -30 V 12 120 VI = -16 V to -22 V, Io = 1 A 12 120 TJ = +25C, IO = 5 mA to 1.5 A 12 150 TJ = +25C, IO = 250 mA to 750 mA 4 75 3 6 TJ = +25C VO Line Regulation(12) Unit V mV VO Load Regulation(12) IQ Quiescent Current TJ = +25C IQ Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -15 V to -30 V 0.10 1.00 Temperature Coefficient of VD IO = 5 mA -0.8 mV/C VN Output Noise Voltage f = 10 Hz to 100 kHz, TA = +25C 200 V RR Ripple Rejection f = 120 Hz, VI = 10 V 60 dB Vo/T 54 mV mA mA VD Dropout Voltage TJ = +25C, IO = 1 A 2 V ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A Note: 12. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 12 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7912A) (VI = -23 V, IO = 500 mA, 0C TJ +125C, CI = 2.2 F, CO = 1 F; unless otherwise specified.) Symbol VO Parameter Output Voltage Conditions Min. Typ. Max. TJ = +25C -14.7 -15.0 -15.3 IO = 5 mA to 1 A, PO 15 W, VI = -18 V to -30 V -14.4 -15.0 -15.6 VI = -17.5 V to -30 V, Io = 1 A 12 150 VI = -20 V to -26 V, Io = 1 A 6 75 VI = -17.9 V to -30 V 12 150 VI = -20 V to -26 V, Io = 1 A 6 150 TJ = +25C VO Line Regulation(13) Unit V mV TJ = +25C, IO = 5 mA to 1.5 A 12 150 TJ = +25C, IO = 250 mA to 750 mA 4 75 Quiescent Current TJ = +25C 3 6 Quiescent Current Change IO = 5 mA to 1 A 0.05 0.50 VI = -18.5 V to -30 V 0.10 1.00 Temperature Coefficient of VD IO = 5 mA -0.9 mV/C VN Output Noise Voltage f = 10 Hz to 100 kHz, TA = +25C 250 V RR Ripple Rejection f = 120 Hz, VI = 10 V 60 dB VO Load Regulation(13) IQ IQ Vo/T 54 mV mA mA VD Dropout Voltage TJ = +25C, IO = 1 A 2 V ISC Short-Circuit Current TJ = +25C, VI = -35 V 300 mA IPK Peak Current TJ = +25C 2.2 A Note: 13. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty is used. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 13 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Electrical Characteristics (KA7915A) 15 Vin=10V Io=40mA Ou 5.05 tp 5 ut Vo lta 4.95 ge [- 4.9 V] Load Regulation[mV] Output Voltage[-V] 5.1 Vin=25V Io=100mA 4.85 4.8 -40 -25 0 25 50 75 100 Io=0.75A -1 -3 -5 25 125 Io=1.5A Lo 13 ad 11 Re 9 gul 7 ati 5 on 3 [m 1 V] -40 TA, Ambient Temperature [ oC] 0 25 50 75 100 125 TA, Ambient Temperature [ oC] Figure 2. Output Voltage Figure 3. Load Regulation 4 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 V l [V] Dropout Voltage [V] 3.5 D Quiescent Current [mA] -25 3 2.5 2 1.5 Io=1A 1 0.5 0 -40 -25 0 25 50 75 100 TA, Ambient Temperature [oC] 125 5 Figure 4. Quiescent Current -40 -25 0 25 50 75 100 125 TA, Ambient Temperature [oC] Figure 5. Dropout Voltage Short Circuit Current[A] 0.6 0.55 Sh 0.5 ort 0.45 Cir 0.4 cui 0.35 0.3 t 0.25 Cu 0.2 rre 0.15 nt 0.1 [A] 0.05 0 -0.05 -0.1 -40 -25 0 25 50 75 100 TA, Ambient Temperature [ oC] 125 Figure 6. Short-Circuit Current (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 14 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Typical Performance Characteristics + 2.2 F + 1 F Co CI 1 2 Input 3 KA79XX LM79XX Output Figure 7. Negative Fixed Output Regulator 1 +15 V KA7812 LM7812 + C1 3 Co + 2 0.33 F +12 V 1 F 1N4001 * GND + 2.2 F C1 1 2 -15 V 1 F + Co KA7912 LM7912 3 1N4001 * -12 V Figure 8. Split Power Supply (12 V / 1 A) Notes: 14. To specify an output voltage, substitute voltage value for "XX". 15. CI is required if the regulator is located an appreciable distance from the power supply filter. For value given, capacitor must be solid tantalum. If aluminium electronics are used, at least ten times the value shown should be selected. 16. CO improves stability and 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. (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 15 KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Typical Applications KA79XX / KA79XXA / LM79XX -- 3-Terminal 1 A Negative Voltage Regulator Physical Dimensions Figure 9. TO-220, MOLDED, 3-LEAD, JEDEC VARIATION AB (ACTIVE) (c) 2002 Fairchild Semiconductor Corporation KA79XX / KA79XXA / LM79XX Rev. 1.1.1 www.fairchildsemi.com 16 TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks. F-PFS FRFET(R) SM Global Power Resource GreenBridge Green FPS Green FPS e-Series Gmax GTO IntelliMAX ISOPLANAR Making Small Speakers Sound Louder and BetterTM MegaBuck MICROCOUPLER MicroFET MicroPak MicroPak2 MillerDrive MotionMax MotionGrid(R) MTi(R) MTx(R) MVN(R) mWSaver(R) OptoHiT AccuPower Awinda(R) AX-CAP(R)* BitSiC Build it Now CorePLUS CorePOWER CROSSVOLT CTL Current Transfer Logic DEUXPEED(R) Dual CoolTM EcoSPARK(R) EfficientMax ESBC (R) Fairchild(R) Fairchild Semiconductor(R) FACT Quiet Series FACT(R) FAST(R) FastvCore FETBench FPS (R)* (R) (R) PowerTrench PowerXSTM Programmable Active Droop QFET(R) QS Quiet Series RapidConfigure Saving our world, 1mW/W/kW at a timeTM SignalWise SmartMax SMART START Solutions for Your Success SPM(R) STEALTH SuperFET(R) SuperSOT-3 SuperSOT-6 SuperSOT-8 SupreMOS(R) SyncFET Sync-LockTM TinyBoost(R) TinyBuck(R) TinyCalc TinyLogic(R) TINYOPTO TinyPower TinyPWM TinyWire TranSiC TriFault Detect TRUECURRENT(R)* SerDes UHC(R) Ultra FRFET UniFET VCX VisualMax VoltagePlus XSTM XsensTM TM * Trademarks of System General Corporation, used under license by Fairchild Semiconductor. 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