KA278RA05C Fairchild Semiconductor, KA278RA05C Datasheet
KA278RA05C
Available stocks
Related parts for KA278RA05C
KA278RA05C Summary of contents
Page 1
... The dropout voltage of KA278RXXC is below 0.5V in full rated current(2A). This regulator has various functions such as a peak current protection, a thermal shut down, an overvoltage protection . TO-220F-4L 1 1.Vin GND 4. Vdis - KA278RXXC(33/05/12) 1.Vin GND 4. Vadj - KA278RA05C Q1 Vin THERMAL SHUTDOWN BANDGAP REFERENCE ...
Page 2
... KA278RXXC-SERIES Absolute Maximum Ratings KA278RXXC, KA278RA05C Parameter Input voltage Disable voltage Output current Power dissipation 1 Power dissipation 2 Junction temperature Operating temperature Thermal resistance, junction-to case (note2) Thermal resistance, junction-to-air (note2) 2 Symbol Value Vin KA278RXXC Vdis Io Pd1 Pd2 Tj Topr - Rθjc Rθ ...
Page 3
... Disable bias current high KA278RXXC Disable bias current low KA278RXXC Quiescent current Reference voltage KA278RA05C 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. ...
Page 4
KA278RXXC-SERIES Typical Performance Characteristics KA278R33C 5.25 4.50 3.75 RL= 3.00 2.25 RL=3.3Ω 1.50 0. Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 5.25 4.50 3.75 3.00 2.25 1.50 0. 0.5 1 ...
Page 5
Typical Performance Characteristics - TEMPERATURE Tj( Figure 7. Power Dissipation vs. Temperature(Tj) 4.75 4.50 4.25 4.00 3.75 3. Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt ...
Page 6
KA278RXXC-SERIES Typical Performance Characteristics KA278R05C RL= 4 RL=2.5 Ω Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 0.5 1 ...
Page 7
Typical Performance Characteristics - TEMPERATURE Tj( Figure 7. Power Dissipation vs. Temperature(Tj) 4.75 4.50 4.25 4.00 3.75 3. Input-output differential voltage Vin-Vo (V) Figure 9. Output Peak Currenrt ...
Page 8
KA278RXXC-SERIES Typical Performance Characteristics KA278R12C 15.0 12.5 RL= 10.0 RL= 6Ω 7.5 5.0 2 Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 15.0 12.5 10.0 7.5 5.0 2 0.5 1 1.5 ...
Page 9
Typical Performance Characteristics - TEMPERATURE Tj( Figure 7. Power Dissipation vs. Temperature(Tj) 4.75 4.75 4.50 4.50 4.25 4.25 4.00 4.00 3.75 3.75 3.50 3. ...
Page 10
... KA278RXXC-SERIES Typical Performance Characteristics KA278RA05C RL= 4 RL=2.5Ω Input voltage Vin (V) Figure 1. Output Voltage vs. Input Voltage 5.06 5.04 5.02 5.00 4.98 4.96 4.94 4.92 - TEMPERATURE Tj( Figure 3. Output Voltage vs. Temperature(Tj) * Fixed Mode (Vo=5V) 0.70 0.65 0.60 0.55 0.50 2.0A 0.45 0.40 0.35 0.30 - Junction Temp Tj [ ℃ ] Figure 5. Dropout Voltage vs.Junction Temperature 10 (Continued Figure 2. Quiescent Current vs. Input Voltage ...
Page 11
Typical Performance Characteristics 100 100 3.0 3 1.0 1.0 2.0 2.0 Output Current(A) Output Current(A) Figure 7. Overcurrent Protection Characteristics(Typical value) (Continued) 4.0 4.0 5.0 5.0 6.0 6.0 ...
Page 12
KA278RXXC-SERIES Typical Application KA278R33/05/12C • required if regulator is located at an appreciable distance from power supply filter. • Co improves stability and transient response.(Co > 47μF) KA278RA05 Input Input Input • required if regulator is ...
Page 13
Mechanical Dimensions Package TO-220F-4L KA278RXXC-SERIES Dimensions in millimeters 13 ...
Page 14
KA278RXXC-SERIES Mechanical Dimensions Package TO-220F-4L (Forming) 14 (Continued) Dimensions in millimeters ...
Page 15
... KA278RXXC-SERIES Ordering Information Product Number KA278R33CTU KA278R05CTU KA278R12CTU KA278RA05CTU KA278R12CYDTU TO-220F-4L(Forming) 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 ...