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 OVERVOLTAGE PROTECTION BANDGAP REFERENCE - 2 Vo + R1 SOA PROTECTION HIGH / LOW Vdis 4 + OUTPUT ON / OFF R2 1.4V SHORT-CIRCUIT SHORTCIRCUIT PROTECTION 3 GND Rev. 1.0.0 ©2003 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) Rθjc 4.31 °C/W - Thermal resistance, junction-to-air (Note2) Rθja 48.83 °C/W - Junction temperature 2 KA78RXXC-SERIES Electrical Characteristics (Vin = Note3, Io = 0.5A, Ta = 25°C, 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 µA 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=3.3Ω Ω 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=5Ω Ω 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 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] 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 8 Quiescent current Iq(mA) RL= 8 Output voltage Vo(V) 10 7 6 5 RL=8Ω Ω 4 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 TEMPERATURE 75 100 125 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 RL=9Ω Ω 4 3 2 1 60 40 20 RL= ∞ 0 0 0 0 5 10 15 20 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 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) 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=12Ω Ω 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=15Ω Ω 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 > 47µF) 16 KA78RXXC-SERIES Mechanical Dimensions Package Dimensions in millimeters TO-220F-4L 17 KA78RXXC-SERIES Mechanical Dimensions (Continued) Package Dimensions in millimeters TO-220F-4L(Forming) 18 KA78RXXC-SERIES Mechanical Dimensions (Continued) Package Dimensions in millimeters TO-220F-4L(Short Lead) NOTE 1. THESE DIMENSIONS DO NOT INCLUDE MOLD PROTRUSION. 2. ( ) IS REFERENCE 3. [ ] IS ASS'Y OUT QUALITY TITLE PKG OUTLINE TO-220F-4L , SHORT LEAD TOLERANCE UNIT mm DWG. NO. N/A D SCALE 5:1 SPEC NO. 19 KA78RXXC-SERIES Ordering Information Product Number Package Operating Temperature KA78R33CTU KA78R05CTU KA78R08CTU KA78R09CTU TO-220F-4L KA78R12CTU KA78R15CTU KA78R33CYDTU KA78R05CYDTU TO-220F-4L(Forming) -20°C to +80°C KA78R09CYDTU KA78R33CTSTU KA78R05CTSTU KA78R08CTSTU TO-220F-4L(Short Lead) KA78R09CTSTU KA78R12CTSTU 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 8/26/03 0.0m 001 Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation