ACE1085

                                                                                         ACE1085                                               Technology Description 3A Low Dropout Linear Regulator ACE1085 is a series of low dropout three terminal regulators with a dropout of 1.3V at 3A load current. Other than a fixed version (Vout＝1.8V,2.5V,3.3V,5.0V）, ACE1085 has an adjustable version, The adjustable version can set the output voltage with two external resistors. ACE1085 offers thermal shut down and current limit functions, to assure the stability of chip and power system. And it uses trimming technique to guarantee output voltage accuracy within ±2％. The ACE1085 series is available in standard packages of TO-263-2L, TO-263-3L, TO-220 and TO-252. Features ● Other than a fixed version and an adjustable version, output value can be customized on command. ● Maximum output current is 3A ● Output voltage accuracy is within ±2％ （±1％ Customized） ● Range of operation input voltage: Max 18V ● Line regulation: 0.2％ (Typical) ● Load regulation: 0.2％ (Typical) ● Environment Temperature: -50℃~140℃ Application ● Power Management for Computer Mother Board, Graphic Card ● Battery Charger ● Post Regulators for Switching Supplies ● Microprocessor Supply Absolute Maximum Ratings Parameter Input voltage Junction temperature Environment Temperature Storage temperature Symbol VIN TJ TA TS Max Unit 18 V O 150 C O 140 C - 65 to 150 OC Packaging Type TO-220 TO-263-3L TO-263-2L TO-252 1 2 3 1 2 3 1 2 3 1 2 3 VER 1.2 1                                                                                           ACE1085                                               Technology Fixed Version Pin Symbol Definition 1 GND Ground 2 Vout Output 3 Vin Input 3A Low Dropout Linear Regulator Adjustable Version Pin Symbol Definition 1 ADJ Adjustable 2 Vout Output 3 Vin Input Ordering information Selection Guide ACE1085 XX XX + H Halogen - free Pb - free 1WM : TO-263-2 2WM : TO-263-3L YM : TO-252 ZM : TO-220 Output Voltage : 1.8V / 2.5V ….. 5.0V / Default: Adjustable Version Block Diagram Recommended Work Conditions Item Min Nom Max Unit Input Voltage Range 18 V Environment Temperature -50 140 ℃ VER 1.2 2                                                                                          ACE1085                                               Technology Electrical Characteristics 3A Low Dropout Linear Regulator TJ=25℃ Parameter Reference Voltage Symbol Vref Test Conditions Iout=10mA,Vin-Vout=3V, 10mA≤Iout≤3A ,1.5V≤Vin-Vout≤5V ACE1085-1.80V, Iout=0mA,Vin=4.8V,Tj=25℃ 10mA≤Iout≤3A ,3.4V≤Vin≤7V ACE1085-2.50V, Iout=0mA,Vin=4.8V,Tj=25℃ 10mA≤Iout≤3A ,4.1V≤Vin≤7V ACE1085-3.3V,Iout=0mA,Vin=6.3V,Tj=25℃ 10mA ≤Iout≤3A ,4.9V≤Vin≤8V ACE1085-5.0V, Iout=0mA,Vin=8.0V,Tj=25℃ 10mA ≤Iout≤3A ,6.6V≤Vin≤10V ACE1085-ADJ,Iout=10mA , 2.85V≤Vin≤10V ACE1085-1.8V, Iout=10mA, 3.4V≤Vin≤10V Min 1.238 1.225 1.782 1.764 2.475 2.45 3.267 3.234 4.95 4.90 Typ 1.25 1.25 1.80 1.80 2.50 2.50 3.3 3.3 5.0 5.0 0.035 1 1 1 1 0.2 3 3 3 3 1.3 Mum Unit 1.262 1.275 1.818 1.836 2.525 2.55 3.333 3.366 5.05 5.10 0.2 5 5 5 5 0.4 15 15 15 15 1.5 V V V V V mV mV  mV  mV  mV  % mV  mV  mV  mV  V A 10 10 mV mV Output Voltage Vout Line Regulation (Note1) ΔVout ACE1085-2.5V, Iout=10mA, 4.1V≤Vin≤10V ACE1085-3.3V, Iout=10mA, 4.9V≤Vin≤10V ACE1085-5.0V, Iout=10mA, 6.6V≤Vin≤10V ACE1085-ADJ, Vin-Vout=3V, 10mA≤Iout≤3A ACE1085-1.8V, Vin-Vout=3V, 0≤Iout≤3A Load Regulation (Note1,2) ΔVout ACE1085-2.5V, Vin-Vout=3V, 0≤Iout≤3A ACE1085-3.3V, Vin-Vout=3V, 0≤Iout≤3A ACE1085-5.0V, Vin-Vout=3V, 0≤Iout≤3A Dropout Voltage (Note3) Current Limit Minimum Load Current (Note4) Quiescent Current Adjust Pin Current (Adjustable Version) Vin-Vout ΔVout, ΔVref =1%，Iout=3A Vin-Vout=3V, Tj=25℃ 3.2 4.5 3 4 llimit ACE1085-ADJ Vin=10V Iq IAdj Vin=4.25V,Iout=10mA 45 110 uA Ripple Rejection Adjust Pin Current Change Temperature Stability Ichange F=120Hz,Cout=25uF( tan),Iout=3A,Vin-Vout=3V 10mA≤Iout≤3A, 1.5V≤Vin-Vout ≤6V 0.2 5 dB uA Iout=10mA, Vin-Vout=1.5V 0.5 % VER 1.2 3                                                                                          ACE1085 ℃ /W                                               Technology Thermal Resistance junction to case TO-252 TO-263 TO-220 3A Low Dropout Linear Regulator 12.5 3 3 θJC Note1:The Parameters of Line Regulation and Load Regulation in Table1 are tested under constant junction temperature. Note2:When Iout varies between 0~3A,Vin-Vout varies between 1.5V~6V under constant junction temperature, the parameter is satisfied the criterion in table. If temperature varies between -50℃≤TA≤140℃，it needs output current to be larger than 10mA to satisfy the criterion. Note3:Dropout Voltage is tested Vdropout=Vin2-Vout2. Note4:Minimum Load Current is defined as the minimum output current required to maintain regulation. When 1.5V≦Vin-Vout≦6V，the device is guaranteed to regulate if the output current is greater than 10mA. under Iout=3A and the following testing conditions: First step is to find out the Vout value(Vout1) when Vin1=Vout+1.5V, second step is to decrease Vin(Vin2) until Vout value is equal to 99%*Vout1(Vout2). Detailed Description ACE1085 is a series of low dropout voltage, three terminal regulators. Its application circuit is very simple: the fixed version only needs two capacitors and the adjustable version only needs two resistors and two capacitors to work. It is composed of some modules including start-up circuit, bias circuit, bandgap, thermal shutdown, current limit, power transistors and its driver circuit and so on. The thermal shut down and current limit modules can assure chip and its application system working safety when the environment temperature is larger than 140℃ or output current is larger than 3.2A. The bandgap module provides stable reference voltage, whose temperature coefficient is compensated by careful design considerations. The temperature coefficient is under 100ppm/℃.And the accuracy of output voltage is guaranteed by trimming technique. Typical Application Circuit ACE1085 has an adjustable version and fixed versions, Chart 1 is its typical application. Vin Vin ACE1085 Vout ADJ 125 ohm 10uF Tan R2 R1 Vout 22uF Tan Vout=Vref * (1+R2/R1)+Iadj * R2 VER 1.2 4                                                                                          ACE1085                                               Technology 3A Low Dropout Linear Regulator ACE1085 Typical application of ACE1085 Application Hints 1. Recommend using 10uF tan capacitor as bypass capacitor for all application circuit. 2. Recommend using 22uF tan capacitor to assure circuit stability. 3. Using a bypass capacitor(CAdj) between the adjust terminal and ground can improve ripple rejection, This bypass capacitor prevents ripple from being amplified as the output voltage is increased. The impedance of CAdj should be less than the resistor’s(R1) which is between output and adjust pins to prevent ripple from being amplified at any ripple frequency. As R1 is normally in the range of 120Ω~200Ω,the value of CAdj should satisfy this equation: 2*Fripple*CAdj