A278R08PIC

A278RxxPIC LDO Fixed Regulator IC Description The A278Rxx 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 A278Rxx Series is below Max.0.5V in full rated current (2.0A). This regulator has various functions such as current limit protection, over voltage protection and output on/off control. Features • 2.0A 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 2 34 4. ON/OFF CONTROL Ordering Information Product A278RxxPIC Marking A278RxxPI Package TO-220F-4SL A278RxxPI(①) YYWW(②) ① Device Code ② Year & Week Code Device Selection Guide Device A278R33PIC A278R35PIC A278R05PIC A278R06PIC A278R08PIC A278R09PIC A278R12PIC Output Voltage 3.3V 3.5V 5.0V 6.0V 8.0V 9.0V 12.0V KSD-I0S003-004 1 A278RxxPIC Block Diagram Absolute Maximum Ratings Characteristic Input Voltage [Ta=25℃] Symbol VI Rating 18(All Others) 25(A278R12PIC) Unit V V V W W °C °C °C Control Input Voltage VCT PD1(No Heatsink) 18 2.0 20 150 -20 ~ 80 -55 ~ 150 Power Dissipation PD2(With Heatsink) Junction Temperature Operating Temperature Range Storage Temperature Range TJ Topr Tstg KSD-I0S003-004 2 A278RxxPIC Electrical Characteristics (VI = VO+2V, Io = 1.0A, VCT(High)=2.7V, Ta = 25°C, unless otherwise specified) Electric Characteristic Symbol Conditions A278R33PIC A278R35PIC A278R05PIC Output Voltage VO A278R06PIC A278R08PIC A278R09PIC A278R12PIC Line Regulation Load Regulation Quiescent Current Ripple Rejection Ratio Dropout Voltage △VO(△VI) △VO(△IL) IQC RR VDROP VCT(High) VCT(Low) ICT(High) ICT(Low) Note1, IO=1.0A 5mA≤IO≤2.0A IO=0mA (VO+2V)≤VI≤12V, IO=50mA f=120Hz IO=1.0A IO=2.0A Control Voltage High Control Voltage Low Control Bias Current High Control Bias Current Low Note 1. A278R33: VI=4.3V~12V A278R05: VI=6V~12V A278R08: VI=9V~16V A278R12: VI=12V~16V A278R35: VI=4.5V~12V A278R06: VI=7V~15V A278R09: VI=10V~16V IO=0mA, Output ON IO=0mA, Output OFF VCT(High) = 2.7V VCT(Low) = 0.4V Min. 3.22 3.41 4.88 5.85 7.80 8.78 11.7 45 2.0 Typ. 3.3 3.5 5.0 6.0 8.0 9.0 12.0 0.5 0.1 55 Max. 3.38 3.59 5.12 6.15 8.20 9.22 12.3 2.5 2.0 10 0.3 0.5 0.8 20 -0.4 Unit V V V V V V V % % mA dB V V V V μA mA ◈ Test Circuit of A278RxxPIC ㎌ ㎌ KSD-I0S003-004 3 A278RxxPIC Electrical Characteristic Curves Fig.1 IO vs. VO 100 25 Fig.2 Ta vs. PD Relative Output Voltage [%] 80 Power dissipation PD [W] A278RxxPIC 20 60 15 40 10 20 5 Without Heat Sink 0 0 0.8 1.6 2.4 3.2 4.0 4.8 0 0 25 50 75 100 125 150 Output Current IO [A] Ambient Temperature Ta [˚C] Fig.3 VI vs. IQC 30 30 Fig.4 VI vs. IQC A278R05PIC VI=0V~12V Quiescent Current IQC [mA] 24 Quiescent Current IQC [mA] A278R33PIC VI=0V~12V 24 18 18 12 12 IO=2.0A IO=1.0A 0 0 2 4 6 IO=0.0A 8 10 12 6 IO=0.0A 0 0 2 4 6 8 10 12 6 Input Voltage VI [V] Input Voltage VI [V] Fig.6 VI vs. IQC 30 30 Fig.7 VI vs. IQC A278R09PIC VI=0V~15V Quiescent Current IQC [mA] 24 Quiescent Current IQC [mA] A278R08PIC VI=0V~15V 24 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-I0S003-004 Input Voltage VI [V] 4 A278RxxPIC Electrical Characteristic Curves Fig.8 VI vs. IQC 50 5 Fig.9 Tj vs. IQC A278RxxPIC IO=0.0A Quiescent Current IQC [mA] Quiescent Current IQC [mA] 40 A278R12PIC VI=0V~20V 4 30 3 20 2 10 IO=0.0A 0 0 4 8 12 16 20 24 1 0 -25 0 25 50 75 100 125 Input Voltage VI [V] Fig.10 VCT vs. VO 125 5.2 5.1 Junction Temperature Tj [℃] Fig.11 Tj vs. VO A278R05PIC IO=1.0A Relative Output Voltage [%] Output Voltage VO [V] A278RxxPIC 100 75 5.0 50 4.9 25 4.8 0 0 0.5 1.0 1.5 2.0 2.5 3.0 4.7 -25 0 25 50 75 100 125 Control Voltage VCT [V] Junction Temperature Tj [℃] KSD-I0S003-004 5 A278RxxPIC Outline Dimension KSD-I0S003-004 6 A278RxxPIC 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-I0S003-004 7