www.fairchildsemi.com KA79XX/KA79XXA 3-Terminal 1A Negative Voltage Regulator Features Description * * * * * The KA79XX/KA79XXA series of three-terminal negative regulators are available in TO-220 package and 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, making it essentially indestructible. Output Current in Excess of 1A Output Voltages of -5, -6, -8, -9, -12, -15, -18 , -24V Internal Thermal Overload Protection Short Circuit Protection Output Transistor Safe Operating Area Compensation TO-220 (Dual Gauge) Vin 1 1. GND 2. Input 3. Output Internal Block Digram GND R1 VOLTAGE REFERENCE R2 Output Out + Q1 Q2 I1 I2 PROTECTION CIRCUITRY Rsc In Input Rev. 1.0.3 (c)2012 Fairchild Semiconductor Corporation KA79XX/KA79XXA Absolute Maximum Ratings Parameter Symbol Value Unit VI -35 V Thermal Resistance Junction-Case (Note1) RJC 5 C/W Thermal Resistance Junction-Air (Note1, 2) RJA 65 C/W Operating Temperature Range TOPR 0 ~ +125 C Storage Temperature Range TSTG - 65 ~ +150 C Input Voltage Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow Electrical Characteristics (KA7905) (VI = -10V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol VO Conditions Min. Typ. Max. TJ = +25C -4.8 -5.0 IO = 5mA to 1A, PO 15W VI = -7V to -20V -4.75 -5.0 -5.25 Unit -5.2 V VI = -7V to -25V - 35 100 VI = -8V to -12V - 8 50 TJ = +25C, IO = 5mA to 1.5A - 10 100 TJ =+25C, IO = 250mA to 750mA - 3 50 TJ =+25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -8V to -25V - 0.1 0.8 Temperature Coefficient of VD Vo/T IO = 5mA - -0.4 - mV/C Output Noise Voltage VN f = 10Hz to 100kHz, TA = +25C - 40 - V Ripple Rejection RR f = 120Hz, VI = 10V 54 60 - dB Dropout Voltage VD TJ =+25C, IO = 1A - 2 - V Short Circuit Current ISC TJ =+25C, VI = -35V - 300 - mA Peak Current IPK TJ =+25C - 2.2 - A Line Regulation (Note3) VO Load Regulation (Note3) VO Quiescent Current Quiescent Current Change IQ IQ TJ = +25C mV mV mA mA 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. 2 KA79XX/KA79XXA Electrical Characteristics (KA7906) (Continued) (VI = -11V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO = 1F, unless otherwise specified.) Parameter Output Voltage Symbol VO Line Regulation (Note1) VO Load Regulation (Note1) VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ IQ Vo/T Conditions Min. Typ. Max. TJ =+25C -5.75 -6 -6.25 IO = 5mA to 1A, PO 15W VI = -9V to -21V -5.7 -6 -6.3 VI = -8V to -25V - 10 120 VI = -9V to -13V - 5 60 TJ = +25C, IO = 5mA to 1.5A - 10 120 TJ = +25C, IO = 250mA to 750mA - 3 60 TJ = +25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -8V to -25V - 0.1 1.3 IO = 5mA - -0.5 - mV/C - 130 - V TJ = +25C Unit V mV mV mA mA Output Noise Voltage VN f = 10Hz to 100kHz, TA =+25C Ripple Rejection RR f = 120Hz, VI = 10V 54 60 - dB Dropout Voltage VD TJ = +25C, IO = 1A - 2 - V Short Circuit Current ISC TJ = +25C, VI = -35V - 300 - mA Peak Current IPK TJ = +25C - 2.2 - A Note 1. 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. 3 KA79XX/KA79XXA Electrical Characteristics (KA7908) (Continued) (VI = -14V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol VO Line Regulation (Note1) VO Load Regulation (Note1) VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ IQ Vo/T Conditions Min. Typ. Max. TJ =+25C -7.7 -8 -8.3 IO = 5mA to 1A, PO 15W VI = -10V to -23V -7.6 -8 -8.4 VI = -10.5V to -25V - 10 160 VI = -11V to -17V - 5 80 TJ = +25C, IO = 5mA to 1.5A - 12 160 TJ = +25C, IO = 250mA to 750mA - 4 80 TJ = +25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -10.5V to -25V - 0.1 1 IO = 5mA - -0.6 - mV/C - 175 - V 54 60 - dB TJ = +25C Unit V mV mV mA mA Output Noise Voltage VN f = 10Hz to 100kHz, TA = +25C Ripple Rejection RR f = 120Hz, VI = 10V Dropout Voltage VD TJ =+25C, IO = 1A - 2 - V Short Circuit Current ISC TJ =+25C, VI = -35V - 300 - mA Peak Current IPK TJ = +25C - 2.2 - A Note 1. 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. 4 KA79XX/KA79XXA Electrical Characteristics (KA7909) (Continued) (VI = -15V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol VO Line Regulation (Note1) VO Load Regulation (Note1) VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ IQ Vo/T Conditions Min. Typ. Max. TJ = +25C -8.7 -9.0 -9.3 IO = 5mA to 1A, PO 15W VI = -1.5V to -23V -8.6 -9.0 -9.4 VI = -11.5V to -26V - 10 180 VI = -12V to -18V - 5 90 TJ =+25C, IO = 5mA to 1.5A - 12 180 TJ =+25C, IO = 250mA to 750mA - 4 90 TJ = +25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -11.5V to -26V - 0.1 1 IO = 5mA - -0.6 - mV/C - 175 - V TJ =+25C Unit V mV mV mA mA Output Noise Voltage VN f = 10Hz to 100kHz, TA = +25C Ripple Rejection RR f = 120Hz, VI = 10V 54 60 - dB Dropout Voltage VD TJ = +25C, IO = 1A - 2 - V Short Circuit Current ISC TJ = +25C, VI = -35V - 300 - mA Peak Current IPK TJ = +25C - 2.2 - A Note 1. 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. 5 KA79XX/KA79XXA Electrical Characteristics (KA7912) (Continued) (VI = -19V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Min. Typ. Max. TJ = +25C -11.5 -12 -12.5 IO = 5mA to 1A, PO 15W VI = -15.5V to -27V -11.4 -12 -12.6 VI = -14.5V to -30V - 12 240 VI = -16V to -22V - 6 120 TJ = +25C, IO = 5mA to 1.5A - 12 240 TJ =+25C, IO = 250mA to 750mA - 4 120 TJ =+25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -14.5V to -30V - 0.1 1 Temperature Coefficient of VD Vo/T IO = 5mA - -0.8 - mV/C Output Noise Voltage VN f = 10Hz to 100kHz, TA =+25C - 200 - V Ripple Rejection RR f = 120Hz, VI = 10V 54 60 - dB Dropout Voltage VD TJ = +25C, IO = 1A - 2 - V Short Circuit Current ISC TJ = +25C, VI = -35V - 300 - mA Peak Current IPK TJ = +25C - 2.2 - A Output Voltage Symbol VO Line Regulation (Note1) VO Load Regulation (Note1) VO Quiescent Current Quiescent Current Change IQ IQ Conditions TJ = +25C Unit V mV mV mA mA Note 1. 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. 6 KA79XX/KA79XXA Electrical Characteristics (KA7915) (Continued) (VI = -23V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol VO Line Regulation (Note1) VO Load Regulation (Note1) VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ IQ Vo/T Conditions Min. Typ. Max. TJ = +25C -14.4 -15 -15.6 IO = 5mA to 1A, PO 15W VI = -18V to -30V -14.25 -15 -15.75 VI = -17.5V to -30V - 12 300 VI = -20V to -26V - 6 150 TJ = +25C, IO = 5mA to 1.5A - 12 300 TJ =+25C, IO = 250mA to 750mA - 4 150 TJ =+25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -17.5V to -30V - 0.1 1 IO = 5mA - -0.9 - mV/C - 250 - V TJ = +25C Unit V mV mV mA mA Output Noise Voltage VN f = 10Hz to 100kHz, TA = +25C Ripple Rejection RR f = 120Hz, VI = 10V 54 60 - dB Dropout Voltage VD TJ = +25C, IO = 1A - 2 - V Short Circuit Current ISC TJ = +25C, VI = -35V - 300 - mA Peak Current IPK TJ = +25C - 2.2 - A Note 1. 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. 7 KA79XX/KA79XXA Electrical Characteristics (KA7918) (Continued) (VI = -27V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol VO Line Regulation (Note1) VO Load Regulation (Note1) VO Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ IQ Vo/T Conditions Min. Typ. Max. TJ = +25C -17.3 -18 -18.7 IO = 5mA to 1A, PO 15W VI = -22.5V to -33V -17.1 -18 -18.9 VI = -21V to -33V - 15 360 VI = -24V to -30V - 8 180 TJ = +25C, IO = 5mA to 1.5A - 15 360 TJ = +25C, IO = 250mA to 750mA - 5 180 TJ = +25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -21V to -33V - 0.1 1 IO = 5mA - -1 - mV/C - 300 - V TJ = +25C Unit V mV mV mA mA Output Noise Voltage VN f = 10Hz to 100kHz, TA = +25C Ripple Rejection RR f = 120Hz, VI = 10V 54 60 - dB Dropout Voltage VD TJ = +25C, IO = 1A - 2 - V Short Circuit Current ISC TJ = +25C, VI = -35V - 300 - mA Peak Current IPK TJ =+25C - 2.2 - A Note 1. 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. 8 KA79XX/KA79XXA Electrical Characteristics (KA7924) (Continued) (VI = -33V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Symbol Conditions TJ = +25C Min. Typ. Max. Unit -23 -24 -25 -22.8 -24 -25.2 VI = -27V to -38V - 15 480 VI = -30V to -36V - 8 180 TJ = +25C, IO = 5mA to 1.5A - 15 480 TJ = +25C, IO = 250mA to 750mA - 5 240 TJ = +25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -27V to -38V - 0.1 1 Temperature Coefficient of VD Vo/T IO = 5mA - -1 - mV/C Output Noise Voltage VN f = 10Hz to 100kHz, TA =+25C - 400 - V Ripple Rejection RR f = 120Hz, VI = 10V 54 60 - dB Dropout Voltage VD TJ =+25C, IO = 1A - 2 - V Short Circuit Current ISC TJ =+25C, VI = -35V - 300 - mA Peak Current IPK TJ =+25C - 2.2 - A Output Voltage VO Line Regulation (Note1) VO Load Regulation (Note1) VO Quiescent Current Quiescent Current Change IQ IQ IO = 5mA to 1A, PO 15W VI = -27V to -38V TJ =+25C V mV mV mA mA Note 1. 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. 9 KA79XX/KA79XXA Electrical Characteristics (KA7912A) (Continued) (VI = -19V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol VO Conditions Min. Typ. Max. TJ =+25C -11.75 -12 -12.25 IO = 5mA to 1A, PO 15W VI = -15.5V to -27V -11.5 -12 -12.5 VI = -14.5V to -27V Io = 1A - 12 120 VI= -16V to -22V Io = 1A - 6 60 VI = -14.8V to -30V - 12 120 VI = -16V to -22V, Io = 1A - 12 120 TJ =+25C, IO = 5mA to 1.5A - 12 150 TJ =+25C, IO = 250mA to 750mA - 4 75 TJ =+25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -15V to -30V - 0.1 1 IO = 5mA - -0.8 - mV/C - 200 - V 54 60 - dB TJ = +25C Line Regulation (Note1) Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient of VD VO VO IQ IQ Vo/T Unit V mV mV mA mA Output Noise Voltage VN f = 10Hz to 100kHz, TA =+25C Ripple Rejection RR f = 120Hz, VI = 10V Dropout Voltage VD TJ =+25C, IO = 1A - 2 - V Short Circuit Current ISC TJ =+25C, VI = -35V - 300 - mA Peak Current IPK TJ =+25C - 2.2 - A Note 1. 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. 10 KA79XX/KA79XXA Electrical Characteristics (KA7915A) (Continued) (VI = -23V, IO = 500mA, 0C TJ +125C, CI =2.2F, CO =1F, unless otherwise specified.) Parameter Output Voltage Symbol VO Conditions TJ = +25C -14.7 -15 -15.3 IO = 5mA to 1A, PO 15W VI = -18V to -30V -14.4 -15 -15.6 Load Regulation (Note1) Quiescent Current Quiescent Current Change Temperature Coefficient of VD IQ IQ Vo/T V - 12 150 VI = -20V to -26V Io = 1A - 6 75 VI = -17.9V to -30V - 12 150 VI = -20V to -26V, Io = 1A - 6 150 TJ = +25C, IO = 5mA to 1.5A - 12 150 TJ = +25C, IO = 250mA to 750mA - 4 75 TJ =+25C - 3 6 IO = 5mA to 1A - 0.05 0.5 VI = -18.5V to -30V - 0.1 1 IO = 5mA - -0.9 - mV/C - 250 - V VO VO Unit VI = -17.5V to -30V Io = 1A TJ =+25C Line Regulation (Note1) Min. Typ. Max. mV mV mA mA Output Noise Voltage VN f = 10Hz to 100kHz, TA =+25C Ripple Rejection RR f = 120Hz, VI = 10V 54 60 - dB Dropout Voltage VD TJ = +25C, IO = 1A - 2 - V Short Circuit Current ISC TJ =+25C, VI = -35V - 300 - mA Peak Current IPK TJ =+25C - 2.2 - A Note 1. 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. 11 KA79XX/KA79XXA Typical Performance Characteristics 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 Lo 13 ad 11 Re 9 gul 7 ati 5 on 3 [m 1 V] Io=0.75A -1 -3 -5 5 125 Io=1.5A -40 TA, Ambient Temperature [ oC] 50 75 100 4 Dropout Voltage [V] V l [V] 3.5 D Quiescent Current [mA] 25 Figure 2. Load Regulation 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 3 2.5 2 1.5 Io=1A 1 0.5 0 -40 -25 0 25 50 75 100 TA, Ambient Temperature [oC] 125 Figure 3. Quiescent Current 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 -40 -25 0 25 50 75 100 TA, Ambient Temperature [oC] Figure 4. Dropout Voltage 0.6 0.55 Short Circuit Current[A] 0 TA, Ambient Temperature [ oC] Figure 1. Output Voltage 100 TA, Ambient Temperature [ oC] Figure 5. Short Circuit Current 12 -25 125 125 125 KA79XX/KA79XXA Typical Applications + 2.2uF + 1uF Co CI 1 2 3 KA79XX Input Output Figure 6. Negative Fixed output regulator 1 +15V 3 +12V KA7812 + C1 Co + 2 0.33uF 1uF 1N4001 * GND + 2.2uF C1 1 2 -15V 1uF + Co KA7912 3 1N4001 * -12V Figure 7. Split power supply ( 12V/1A) Note: (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 electronics are used, at least ten times value shown should be selected. CI 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 (1N400l or similar) should be introduced to protect the device from momentary input short circuit. 13 KA79XX/KA79XXA Mechanical Dimensions Package Dimensions in millimeters TO-220 [DUAL GAUGE] 4.50 0.20 2.80 0.10 (3.00) +0.10 1.30 -0.05 18.95MAX. (3.70) o3.60 0.10 15.90 0.20 1.30 0.10 (8.70) (1.46) 9.20 0.20 (1.70) 9.90 0.20 1.52 0.10 0.80 0.10 2.54TYP [2.54 0.20] 2.54TYP [2.54 0.20] 10.00 0.20 14 10.08 0.30 (1.00) 13.08 0.20 ) (45 1.27 0.10 +0.10 0.50 -0.05 2.40 0.20 KA79XX/KA79XXA Ordering Information Product Number Output Voltage Tolerance Package Operating Temperature TO-220 (Dual Gauge) 0 ~ +125C KA7905TU KA7906TU KA7908TU KA7909TU KA7912TU 4% KA7915TU KA7918TU KA7924TU KA7912ATU KA7915ATU 2% 15 KA79XX/KA79XXA DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 6/14/12 0.0m 001 Stock#DS400172 (c) 2012 Fairchild Semiconductor Corporation