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| EH Semiconductor A78RxxPIC LDO Fixed Regulator IC Description The A78Rxx Series is a low dropout voltage regulator suitable for various electronic equipments. It provides constant voltage power source with TO-220F-4SL lead full-mold package. Dropout voltage of A78Rxx Series is below Max .0.5V in full rated current (1A). This regulator has various functions such as current limit protection, over voltage protection and output on/off control. Features * 1A output low dropout regulator * TO-220F-4SL full-mold package (4pin) * Current limit protection * Over voltage protection * Thermal Shutdown Protection * With output on/off control (At typical 1.5V) * Control pin open or high signal, output on Pin Connection 1. INPUT 2. OUTPUT 3. GROUND 1 4. ON/OFF CONTROL Ordering Information Type NO. A78RxxPIC Marking A78RxxPI xx: Voltage (3.3V=33, 5.0V=05, 8.0V=08, 9.0V=09) Package Code TO-220F-4SL Device Selection Guide Device A78R33PIC A78R05PIC A78R08PIC A78R09PIC Output Voltage 3.3V 5.0V 8.0V 9.0V KSD-I0S002-001 1 A78RxxPIC Block Diagram Absolute Maximum Ratings Characteristic Input Voltage Control Input Voltage [Ta=25] Symbol VI VCT PD1(No Heatsink) Rating 18 18 2.0 20 150 -20 ~ 80 -55 ~ 150 Unit V V W W C C C Power Dissipation PD2(With Heatsink) Junction Temperature Operating Temperature Range Storage Temperature Range TJ Topr Tstg KSD-I0S002-001 2 A78RxxPIC Electrical Characteristics (VI = VO+2V, Io = 500mA, VCT(High)=2.7V, Ta = 25C, unless otherwise specified) Electric Characteristic Symbol A78R33PIC A78R05PIC Output Voltage VO A78R08PIC A78R09PIC Line Regulation Load Regulation Quiescent Current Ripple Rejection Ratio Dropout Voltage Control Voltage High Control Voltage Low Control Bias Current High Control Bias Current Low Note 1. A78R33: VI=4.3V~12V A78R08: VI=9V~16V A78R05: VI=6V~12V A78R09: VI=10V~16V VO(VI) VO(IL) IQC RR VDROP VCT(High) VCT(Low) ICT(High) ICT(Low) Note1, IO=500mA 5mAIO1.0A IO=0mA (VO+2V)VI12V, IO=50mA f=120Hz IO=1.0A IO=0mA, Output ON IO=0mA, Output OFF VCT(High) = 2.7V VCT(Low) = 0.4V 7.80 8.78 45 2.0 8.0 9.0 0.5 0.1 55 8.20 9.22 2.5 2.0 10 0.5 0.8 20 -0.4 V V % % mA dB V V V A mA Conditions Min. 3.22 4.88 Typ. 3.3 5.0 Max. 3.38 5.12 Unit V V Test Circuit of A78RxxPIC KSD-I0S002-001 3 A78RxxPIC Electrical Characteristic Curves Fig.1 IO vs. VO 100 25 Fig.2 Ta vs. PD Relative Output Voltage [%] 80 Power dissipation PD [W] A78RxxPIC 20 60 15 40 10 20 5 Without Heat Sink 0 0 0.5 1.0 1.5 2.0 2.5 3.0 0 0 25 50 75 100 125 150 Output Current IO [A] Ambient Temperature Ta [C] Fig.3 VI vs. IQC 30 Fig.4 VI vs. IQC 30 Quiescent Current IQC [mA] 24 Quiescent Current IQC [mA] A78R33PIC VI=0V~12V 24 A78R05PIC VI=0V~12V 18 18 12 12 IO=1.0A IO=0.5A IO=0.0A 0 2 4 6 8 10 12 6 IO=0.0A 0 0 2 4 6 8 10 12 6 0 Input Voltage VI [V] Fig.5 VI vs. IQC 30 Input Voltage VI [V] Fig.6 VI vs. IQC Quiescent Current IQC [mA] 24 Quiescent Current IQC [mA] A78R08PIC VI=0V~15V 30 24 A78R09PIC VI=0V~15V 18 18 12 12 6 IO=0.0A 0 0 2.5 5.0 7.5 10.0 12.5 15.0 6 IO=0.0A 0 0 2.5 5.0 7.5 10.0 12.5 15.0 Input Voltage VI [V] KSD-I0S002-001 Input Voltage VI [V] 4 A78RxxPIC Electrical Characteristic Curves Fig.7 Tj vs. VO 5.2 5.1 Fig.8 Tj vs. IQC 5 Quiescent Current IQC [mA] A78R05PIC IO=0.5A Output Voltage VO [V] 4 A78R05PIC IO=0.0A 5.0 3 4.9 2 4.8 1 4.7 -25 0 25 50 75 100 125 0 -25 0 25 50 75 100 125 Junction Temperature Tj [] Fig.9 VCT vs. VO 125 Junction Temperature Tj [] Relative Output Voltage [%] 100 75 50 25 A78RxxPIC 0 0 0.5 1.0 1.5 2.0 2.5 3.0 Control Voltage VCT [V] KSD-I0S002-001 5 A78RxxPIC Outline Dimensions (Unit: mm) 9.80~10.20 3.05~3.35 0.85 Min. 0.70 Max. 2.54 Typ. 15.40~15.80 12.20~12.60 6.37~6.97 2.00 Typ. 9.10~9.30 1 2 3 4 4.70 Max. KSD-I0S002-001 2.70 Max. 2.15 Max. 6 A78RxxPIC The AUK Corp. products are intended for the use as components in general electronic equipment (Office and communication equipment, measuring equipment, home appliance, etc.). Please make sure that you consult with us before you use these AUK Corp. products in equipments which require high quality and / or reliability, and in equipments which could have major impact to the welfare of human life(atomic energy control, airplane, spaceship, transportation, combustion control, all types of safety device, etc.). AUK Corp. cannot accept liability to any damage which may occur in case these AUK Corp. products were used in the mentioned equipments without prior consultation with AUK Corp.. Specifications mentioned in this publication are subject to change without notice. KSD-I0S002-001 7 |
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