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This literature is subject to all applicable copyright laws and is not for resale in any manner. www.fairchildsemi.com KA78RXXC-Series 1A Output Low Dropout Voltage Regulators Features Description * 1A/3.3V, 5V, 8V, 9V, 12V, 15V output low dropout voltage regulator * TO-220 full-mold package (4pin) * Overcurrent protection, thermal shutdown * Overvoltage protection, short circuit protection * With output disable function The KA78RXXC is a low-dropout voltage regulator suitable for various electronic equipments. It provides constant voltage power source with TO-220-4 lead full mold package. Dropout voltage of KA78RXXC is below 0.5V in full rated current(1A). This regulator has various functions such as peak current protection, thermal shut down, overvoltage protection and output disable function. TO-220F-4L 1 1. Vin 2. VO 3. GND 4. Vdis Internal Block Diagram Vin Q1 1 THERMAL SHUTDOWN BANDGAP REFERENCE 2 Vo OVERVOLTAGE PROTECTION + R1 SOA PROTECTION HIGH / LOW Vdis 4 + OUTPUT ON / OFF R2 1.4V SHORT-CIRCUIT SHORTCIRCUIT PROTECTION 3 GND Rev. 1.0.1 (c)2011 Fairchild Semiconductor Corporation KA78RXXC-SERIES Absolute Maximum Ratings KA78RXXC Parameter Symbol Value Unit Remark Input voltage Vin 35 V - Disable voltage Vdis 35 V - Output current Io 1.0 A - Power dissipation 1 Pd1 1.5 W No heatsink Power dissipation 2 Pd2 15 W With heatsink Tj +150 C - Operating temperature Topr -20 ~ +80 C - Thermal resistance, junction-to case (Note2) Rjc 4.31 C/W - Thermal resistance, junction-to-air (Note2) Rja 48.83 C/W - Junction temperature 2 KA78RXXC-SERIES Electrical Characteristics (Vin = Note3, Io = 0.5A, Ta = 25C, unless otherwise specified) Parameter Output voltage Symbol Conditions Min. Typ. Max. KA78R33C - 3.22 3.3 3.38 KA78R05C - 4.88 5 5.12 - 7.8 8 8.2 - 8.78 9 9.22 KA78R12C - 11.7 12 12.3 KA78R15C - 14.6 15 15.4 KA78R08C KA78R09C Vo Unit V Load regulation Rload 5mA < Io < 1A - 0.1 2.0 % Line regulation Rline Note4 - 0.5 2.5 % Ripple rejection ratio RR Note1 45 55 - dB Dropout voltage Vdrop Io = 1A - - 0.5 V Disable voltage high VdisH Output active 2.0 - - V Disable voltage low VdisL Output disabled - - 0.8 V Disable bias current high IdisH Vdis = 2.7V - - 20 A Disable bias current low IdisL Vdis = 0.4V - - -0.4 mA Io = 0A - - 10 mA Quiescent current Iq Note: 1.These parameters, although guaranteed, are not 100% tested in production. 2. Junction -to -case thermal resistance test environments. -. Pneumatic heat sink fixture. -. Clamping pressure 60psi through 12mm diameter cylinder. -. Thermal grease applied between PKG and heat sink fixture. 3. KA78R33C : Vin = 5V KA78R05C : Vin = 7V KA78R08C : Vin = 10V KA78R09C : Vin = 11V KA78R12C : Vin = 15V KA78R15C : Vin = 20V 4. KA78R33C : Vin = 4V to 10V KA78R05C : Vin = 6V to 12V KA78R08C : Vin = 9V to 25V KA78R09C : Vin = 10V to 25V KA78R12C : Vin = 13V to 29V KA78R15C : Vin = 16V to 30V 3 KA78RXXC-SERIES Typical Performance Characteristics KA78R33 5.25 Quiescent current Iq(mA) 3.75 RL= 3.00 8 Output voltage Vo(V) 80 4.50 2.25 RL=3.3 1.50 60 40 20 RL= 0.75 0 0 0 2 4 6 8 0 5 10 10 15 20 Input voltage Vin(V) Input voltage Vin (V) Figure 2. Quiescent Current vs. Input Voltage 5.25 3.36 4.50 3.34 Output voltage Vo(V) Output voltage Vo(V) Figure 1. Output Voltage vs. Input Voltage 3.75 3.00 2.25 1.50 0.75 3.32 3.30 3.28 3.26 3.24 0 0 0.5 1 1.5 2 2.5 3.22 -25 3 0 Disable voltage Vdis (V) Figure 3. Output Voltage vs. Disable Voltage 75 25 50 TEMPERATURE Tj(oC) 100 125 Figure 4. Output Voltage vs. Temperature(Tj) 0.55 8 0.50 Drop out voltage Vdrop [V] Quescent current Iq(mA) 10 6 4 2 0 -25 0 25 50 75 100 125 o Junction temperature Tj( C) Figure 5. Quiescent Current vs. Temperature(Tj) 4 0.45 0.40 1.0A 0.35 0.30 0.25 0.20 -25 0 25 50 75 100 125 Junction Temp Tj [] Figure 6. Dropout Voltage vs.Junction Temperature KA78RXXC-SERIES Typical Performance Characteristics (Continued) 100 Relative output voltage(%) Power dissipation PD(W) 20 15 10 5 0 -25 80 60 40 20 0 0 25 50 75 100 125 TEMPERATURE TJ(oC) Figure 7. Power Dissipation vs. Temperature(Tj) 0 0.5 1.0 1.5 2.0 2.5 3.0 Output Current(A) Figure 8. Overcurrent Protection Characteristics (Typical Value) Output peak current Iop (A) 2.75 2.50 2.25 2.00 1.75 1.50 0 1 2 3 4 5 6 Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage 5 KA78RXXC-SERIES Typical Performance Characteristics KA78R05C 80 Quiescent current Iq(mA) 6 5 RL= 8 Output voltage Vo(V) 7 4 3 RL=5 2 1 60 40 20 RL= 0 0 0 5 10 0 5 10 15 20 Input voltage Vin(V) 15 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage Figure 2. Quiescent Current vs. Input Voltage 5.06 6 Output voltage Vo(V) Output voltage Vo(V) 7 5 4 3 2 1 0 5.04 5.02 5.00 4.98 4.96 4.94 0 0.5 1 1.5 2 2.5 4.92 -25 3 Disable voltage Vdis (V) Figure 3. Output Voltage vs. Disable Voltage 0 75 25 50 TEMPERATURE Tj(oC ) 100 125 Figure 4. Output Voltage vs. Temperature(Tj) 0.55 8 0.50 Drop out voltage Vdrop [V] i Quescent current Iq(mA) 10 6 4 2 0 -25 0 25 50 75 100 125 Junction temperature Tj(oC) Figure 5. Quiescent Current vs. Temperature(Tj) 6 0.45 0.40 1.0A 0.35 0.30 0.25 0.20 -25 0 25 50 75 100 125 Junction Temp Tj [] Figure 6. Dropout Voltage vs. Junction Temperature KA78RXXC-SERIES Typical Performance Characteristics (Continued) 100 Relative output voltage(%) Power dissipation P DD(W) 20 15 10 5 0 -25 80 60 40 20 0 0 25 50 75 TEMPERATURE 100 125 TjJ(oC) Figure 7. Power Dissipation vs. Temperature(Tj) 0 0.5 1.0 1.5 2.0 2.5 3.0 Output Current(A) Figure 8. Overcurrent Protection Characteristics (Typical Value) Output peak current Iop (A) 2.75 2.50 2.25 2.00 1.75 1.50 0 1 2 3 4 5 6 Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage 7 KA78RXXC-SERIES Typical Performance Characteristics (Continued) KA78R08C 80 9 RL= 8 Quiescent current Iq(mA) 8 Output voltage Vo(V) 10 7 6 5 4 RL=8 3 2 1 60 40 20 RL= 0 0 0 5 10 15 20 0 5 25 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 10 15 20 Input voltage Vin(V) Figure 2. Quiescent Current vs. Input Voltage 10 8.06 8 Output voltage Vo(V) Output voltage Vo(V) 9 7 6 5 4 3 2 8.04 8.02 8.00 7.98 7.96 7.94 1 0 0.5 1 1.5 2 2.5 7.92 -25 3 0 Disable voltage Vdis (V) Figure 3. Output Voltage vs. Disable Voltage 75 25 50 TEMPERATURE Tj(oC) 100 125 Figure 4. Output Voltage vs. Temperature(Tj) 0.55 8 0.50 Drop out voltage Vdrop [V] Quescent current Iq(mA) 10 6 4 2 0 -25 0 25 50 75 0.45 0.40 0.30 0.25 0.20 -25 100 125 1.0A 0.35 0 25 50 75 100 125 Junction Temp Tj [] Junction temperature Tj(oC ) Figure 5. Quiescent Current vs. Temperature(Tj) 8 Figure 6. Dropout Voltage vs.Junction Temperature KA78RXXC-SERIES Typical Performance Characteristics (Continued) 100 Relative output voltage(%) Power dissipation PD(W) 20 15 10 5 0 -25 80 60 40 20 0 0 25 50 75 TEMPERATURE 100 125 TJ(oC) Figure 7. Power Dissipation vs. Temperature(Tj) 0 0.5 1.0 1.5 2.0 2.5 Output Current(A) Figure 8. Overcurrent Protection Characteristics (Typical Value) Output peak current Iop (A) 2.75 2.50 2.25 2.00 1.75 1.50 0 1 2 3 4 5 6 Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage 9 KA78RXXC-SERIES Typical Performance Characteristics (Continued) KA78R09C 80 9 8 Quiescent current Iq(mA) RL= 8 Output voltage Vo(V) 10 7 6 5 4 RL=9 3 2 1 60 40 20 RL= 0 0 0 5 10 15 20 0 5 25 10 15 20 Input voltage Vin(V) Input voltage Vin (V) Figure 2. Quiescent Current vs. Input Voltage Figure 1. Output Voltage vs. Input Voltage 10 9.06 Output voltage Vo(V) Output voltage Vo(V) 9 8 7 6 5 4 3 2 9.04 9.02 9.00 8.98 8.96 8.94 1 0 0 0.5 1 1.5 2 2.5 8.92 -25 3 0 Disable voltage Vdis (V) Figure 3. Output Voltage vs. Disable Voltage 75 25 50 TEMPERATURE Tj(oC ) 100 125 Figure 4. Output Voltage vs. Temperature(Tj) 10 0.50 8 Drop out voltage Vdrop [V] Quescent current Iq(mA) 0.55 6 4 2 0 0.45 0.40 0.30 0.25 0.20 -25 -25 0 25 50 75 100 125 1.0A 0.35 0 25 50 75 100 125 Junction Temp Tj [] Junction temperature Tj(oC) Figure 5. Quiescent Current vs. Temperature(Tj) 10 Figure 6. Dropout Voltage vs.Junction Temperature KA78RXXC-SERIES Typical Performance Characteristics (Continued) 100 Relative output voltage(%) Power dissipation PD(W) 20 15 10 5 80 60 40 20 0 0 -25 0 0 75 25 50 TEMPERATURE TJ(oC) 100 125 Figure 7. Power Dissipation vs. Temperature(Tj) 0.5 1.0 1.5 2.0 2.5 Output Current(A) Figure 8. Overcurrent Protection Characteristics (Typical Value) Output peak current Iop (A) 2.75 2.50 2.25 2.00 1.75 1.50 0 1 2 3 4 5 6 Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage 11 KA78RXXC-SERIES Typical Performance Characteristics (Continued) KA78R12C 80 Quiescent current Iq(mA) 15.0 12.5 RL= 8 Output voltage Vo(V) 17.5 10.0 7.5 RL=12 5.0 2.5 60 40 20 RL= 0 0 0 5 10 15 20 0 5 10 15 20 Input voltage Vin(V) 25 Input voltage Vin (V) Figure 2. Quiescent Current vs. Input Voltage 17.5 12.06 15.0 12.04 Output voltage Vo(V) Output voltage Vo(V) Figure 1. Output Voltage vs. Input Voltage 12.5 10.0 7.5 5.0 2.5 12.02 12.00 11.98 11.96 11.94 0 0 0.5 1 1.5 2 2.5 3 11.92 -25 0 Disable voltage Vdis (V) Figure 3. Output Voltage vs. Disable Voltage 75 25 50 TEMPERATURE Tj(oC) 100 125 Figure 4. Output Voltage vs. Temperature(Tj) 0.55 8 0.50 Drop out voltage Vdrop [V] Quescent current Iq(mA) 10 6 4 2 0 -25 0 25 50 75 0.45 0.40 0.30 0.25 0.20 -25 100 125 1.0A 0.35 0 25 50 75 100 125 Junction Temp Tj [] Junction temperature Tj(oC) Figure 5. Quiescent Current vs. Temperature(Tj) 12 Figure 6. Dropout Voltage vs.Junction Temperature KA78RXXC-SERIES Typical Performance Characteristics (Continued) 100 Relative output voltage(%) Power dissipation PD(W) 20 15 10 5 0 -25 80 60 40 20 0 0 75 25 50 TEMPERATURE TJ(oC) 100 125 Figure 7. Power Dissipation vs. Temperature(Tj) 0 0.5 1.0 1.5 2.0 2.5 3.0 Output Current(A) Figure 8. Overcurrent Protection Characteristics (Typical Value) Output peak current Iop (A) 2.75 2.50 2.25 2.00 1.75 1.50 0 1 2 3 4 5 6 Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage 13 KA78RXXC-SERIES Typical Performance Characteristics (Continued) KA78R15C 17.5 Quiescent current Iq(mA) 12.5 RL= 8 Output voltage Vo(V) 80 15.0 10.0 7.5 RL=15 5.0 60 40 20 RL= 2.5 0 0 5 0 10 15 20 0 5 25 10 15 20 Input voltage Vin(V) Input voltage Vin (V) Figure 2. Quiescent Current vs. Input Voltage 17.5 15.15 15.0 15.10 Output voltage Vo(V) Output voltage Vo(V) Figure 1. Output Voltage vs. Input Voltage 12.5 10.0 7.5 5.0 2.5 0 15.05 15.00 14.95 14.90 14.85 0 0.5 1 1.5 2 2.5 3 14.80 -25 0 Disable voltage Vdis (V) Figure 3. Output Voltage vs. Disable Voltage 75 25 50 TEMPERATURE Tj(oC) 100 125 Figure 4. Output Voltage vs. Temperature(Tj) 10 8 0.50 Drop out voltage Vdrop [V] Quescent current Iq(mA) 0.55 6 4 2 0 0.45 0.40 0.30 0.25 0.20 -25 -25 0 25 50 75 100 125 1.0A 0.35 0 25 50 75 100 125 Junction Temp Tj [] Junction temperature Tj(oC) Figure 5. Quiescent Current vs. Temperature(Tj) 14 Figure 6. Dropout Voltage vs.Junction Temperature KA78RXXC-SERIES Typical Performance Characteristics (Continued) Relative output voltage(%) Power dissipation PD(W) 20 15 10 5 80 60 40 20 0 0 -25 0 75 25 50 TEMPERATURE Tj(oC) 0 100 125 Figure 7. Power Dissipation vs. Temperature(Tj) 0.5 1.0 1.5 2.0 2.5 3.0 Output Current(A) Figure 8. Overcurrent Protection Characteristics (Typical Value) Output peak current Iop (A) 2.75 2.50 2.25 2.00 1.75 1.50 0 1 2 3 4 5 6 Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt vs. Input-Output Differential Voltage 15 KA78RXXC-SERIES Typical Application Vo Vin 1 2 + + 3 GND 4 Vdis Disable Signal Figure 1. Application Circuit * Ci is required if regulator is located at an appreciable distance from power supply filter. * Co improves stability and transient response.(Co > 47F) 16 KA78RXXC-SERIES Mechanical Dimensions Package Dimensions in millimeters TO-220F-4L 17 KA78RXXC-SERIES Ordering Information Product Number Package Operating Temperature TO-220F-4L -20C to +80C KA78R33CTU KA78R05CTU KA78R08CTU KA78R09CTU KA78R12CTU KA78R15CTU 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. 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