ELM1085DG Bipolar 3A LDO Voltage regulator ■General description ELM1085DG is positive and bipolar LDO three terminal voltage regulator with 3A output current capability. This series includes thermal shutdown protection and short circuit current limiter. ELM1085 series is only available in adjustable version. ■Features ■Application • • • • • • • • • Output voltage range (adj.) : 1.27V to 5.55V Line regulation : Typ.0.5% Load regulation : Typ.0.5% LDO voltage : 1.3V typical at up to 3A Package : TO-252 SCSI terminator Linear regulator Battery chargers Micro-controller ■Maximum absolute ratings Parameter Power supply voltage Power dissipation Thermal resistance junction to case Thermal resistance junction to ambient Operating junction temperature Storage temperature Lead temperature(soldering 10s.) Symbol Vcc Pd Rθjc Rθja Top Tstg Tlead Limit 7 Internally limited 5 70 0 to +125 -40 to +150 260 Unit V W °C/W °C/W °C °C °C ■Selection guide ELM1085DG-S Symbol a b c Package Product version Taping direction ELM1085 D G - S ↑ ↑ ↑ a b c D: TO-252 G S: Refer to PKG file * Taping direction is one way. ■Pin configuration TO-252(TOP VIEW) ��� Pin No. 1 2/TAB 3 � � � 3- 1 Pin name ADJ/GND VOUT VIN ELM1085DG Bipolar 3A LDO Voltage regulator ■Typical application Vout=Vref (1+R2/R1)+Iadj×R2 VIN Vin ELM1085DG Cin VOUT Vref ADJ ���� Vout R1 Cout ���� Iadj R2 * Cin needed if device is far from filter capacitors. * Cout required for stability. * We recommend to use Min. 10μF tantalum condenser. ■Electrical characteristics Parameter Reference voltage Line regulation Load regulation Dropout voltage Current limit Min.load current Adjust Pin current Symbol Vref ΔVout/ΔVin ΔVout/ΔIout Vdif Ilim Il (min) Iadj RMS output noise Vn Ripple rejection ratio RR Condition Iout=10mA, Vin=5V Iout=10mA, Vin=(Vout+1.5V) to 7V Iout=10mA to 3A, Vin-Vout=3V Iout=3A, ΔVref=1% Vin-Vout=2V 1.5V≤(Vin-Vout)≤5.75V f=120Hz, Vin=5V, Iout=3A, Cout=22μF Min. 1.23 4 60 ■Marking TO-252 ����� ������� ����������������� L 1085 D G a to i 3- 2 : : : : : LDO Product No.code PKG type (TO-252) Pb-Free package mark Production code Top=25°C Typ. Max. Unit 1.25 1.27 V 0.5 2.0 % 0.5 2.5 % 1.30 1.45 V 5 A 10 mA 55 100 μA Vout× mV 0.003% 72 dB ELM1085DG Bipolar 3A LDO Voltage regulator ������������������������������������������ ■Typical characteristics ������������������������ Dropout Voltage vs. Output Current Short-Circuit Current vs.Temperature 2.0 10 T�J=-40° C 1.6 T�J=125° C T�J=25° C 1.4 1.2 1.0 0.8 0.5 0.4 V��IN-VOUT(SHORT CIRCUIT)=5V ��� 9 Short-Circuit Current(A) Dropout Voltage(V) 1.8 8 7 6 5 4 3 0.2 V��IN-V��� OUT(SHORT CIRCUIT)=3.3V ��� out 2 0 0 0.5 1.0 1.5 2.0 2.5 1 -50 3.0 0 Output Current(A) 100 A) 1 Adjust Pin Current ( Output Voltage Change(%) 1.5 0.5 0 -0.5 -1 90 80 70 60 50 40 30 20 10 -1.5 -25 0 25 50 75 100 0 -50 125 150 50 75 100 125 150 18 80 16 70 14 60 12 50 10 Power(W) Ripple Rejection(dB) 25 20 90 40 V��IN -V O��� UT =3V V����������� R IP PLE(p-p) =1V I��� O UT =3A 100 8 6 4 2 0 10 0 Maximum Power Dissipation* R ipple R ejection vs. Frequency 10 -25 Temperature(° C) Temperature(° C) 20 150 Adjust Pin Current vs.Temperature 2 30 100 Temperature(°C) Percent Change in Output Voltage vs.Temperature -2 -50 50 1k 10k 100k 0 50 70 90 110 130 150 Case Temperature(° C) Frequency(H z) *as Limited by Maximum Junction Temperature 3 -� 3