BL1084-33CS1

BL1084 5A LOW DROPOUT LINEAR REGULATOR Outline： Features： BL1084 is a series of low dropout three terminal regulators with a dropout of 1.4V at 5A load current. ● Other than a fixed version and an adjustable version, output value can be customized on command. ● Maximum output current is 5A ● Range of operation input voltage: Max 18V ● Line regulation: 0.2％ (Typical) ● Load regulation: 0.2％ (Typical) ● Environment Temperature: 0℃~80℃ Other than a fixed version (Vout ＝ 1.8V,2.5V,3.3V,5.0V ） , BL1084 has an adjustable version, The adjustable version can set the output voltage with two external resistors. BL1084 offers thermal shut down and current limit functions, to assure the stability of chip and power system. Applications： ： The BL1084 series is available in standard packages of TO-263-2L, TO-263-3L, TO-220 and TO-252. ● Power Management for Computer Mother Board, Graphic Card ● Battery Charger ● Post Regulators for Switching Supplies ● Microprocessor Supply Pin Configuration： ： Marking information： ： A： Means Manufacture weeks B： Means Manufacture LOT No. C: Means Output Voltage Value D: Means Temp. Range&Rohs Std http://www.belling.com.cn - 1Total 13 Pages 5/8/2007 BL1084 ： Pin Description： Fixed Version Pin No. 1 2 3 Symbol GND Vout Vin Adjustable Version Definition Ground Output Input Pin No. 1 2 3 Symbol Definition Adj. Adjustable Vout Output Vin Input Ordering Information: BL1084-XX X X Package Type： ： S：TO-263-2L S1：TO-263-3L Y：TO-252 Z：TO-220 Temp. Range & Rohs Std.： ： C：80°C & Pb-free Rhos Std Z：80°C & Pb/Sn Plating Output Voltage： ： 18……1.8V 25……2.5V 33……3.3V 50……5.0V Default：Adjustable Version http://www.belling.com.cn - 2Total 13 Pages 5/8/2007 BL1084 Block Diagrams： ： Absolute Maximum Ratings： ： Maximum Input Voltage------------------------------------------------------------------------------- 18V Junction Temperature (TJ)---------------------------------------------------------------------------- 150°C Environment Temperature (TA) --------------------------------------------------------------------- 80°C Storage Temperature (Ts)---------------------------------------------------------------------------- -65～150°C Lead Temperature and Time ---------------------------------------------------------------------------------260°C,10S Recommended Work Conditions： ： Item Min Input Voltage Range Environment Temperature 0 Recommended Max Unit 15 80 V °C Electrical Characteristics (Table 1)： ： Tj=25℃ Symbol Vref Vout Parameter Reference Voltage Output Voltage Conditions Min Typ Max Unit Iout=10mA, Vin-Vout=3V 10mA≤Iout≤5A ,1.5V≤Vin-Vout≤5V 1.238 1.225 1.25 1.25 1.262 1.275 V BL1084-1.80V Iout=0mA,Vin=4.8V,Tj=25℃ 10mA≤Iout≤5A ,3.4V≤Vin≤7V 1.782 1.764 1.80 1.80 1.818 1.836 2.475 2.45 2.50 2.50 2.525 2.55 BL1084-2.50V Iout=0mA,Vin=5.5V,Tj=25℃ 10mA≤Iout≤5A ,4.1V≤Vin≤7V http://www.belling.com.cn - 3Total 13 Pages V V 5/8/2007 BL1084 ∆Vout ∆Vout Vin-Vout BL1084-3.3V Iout=0mA,Vin=6.3V,Tj=25℃ 10mA ≤Iout≤5A ,4.9V≤Vin≤8V 3.267 3.234 3.3 3.3 3.333 3.366 V BL1084-5.0V Iout=0mA,Vin=8.0V,Tj=25℃ 10mA ≤Iout≤5A ,6.6V≤Vin≤10V 4.95 4.90 5.0 5.0 5.05 5.10 V BL1084-ADJ Iout=10mA 2.85V≤Vin≤12V 0.035 0.2 % BL1084-1.8V Iout=10mA 3.4V≤Vin≤12V 7 15 mV BL1084-2.5V Iout=10mA 4.1V≤Vin≤12V 7 15 mV BL1084-3.3V Iout=10mA 4.9V≤Vin≤12V 7 15 mV BL1084-5.0V Iout=10mA 6.6V≤Vin≤12V 7 15 mV BL1084-ADJ Vin-Vout=3V, 10mA≤Iout≤5A 0.2 0.4 % BL1084-1.8V Vin-Vout=3V, 0≤Iout≤5A 16 30 mV BL1084-2.5V Vin-Vout=3V, 0≤Iout≤5A 16 30 mV BL1084-3.3V Vin-Vout=3V, 0≤Iout≤5A 16 30 mV BL1084-5.0V Vin-Vout=3V, 0≤Iout≤5A 16 30 mV Dropout Voltage (note 3) ∆Vout, ∆Vref =1%，Iout=5A 1.4 V Current Limit Vin-Vout=3V, Tj=25℃ 7 A Minimum Load Current (note 4) BL1084-ADJ 3 Line Regulation (note 1) Load Regulation (note 1,2) Ilimit http://www.belling.com.cn - 4Total 13 Pages 10 mA 5/8/2007 BL1084 Iq IAdj Quiescent Current Adjust Pin Current (Adjustable Version) Ripple Rejection Ichange θ JC Vin=10V 5 10 mA Vin=4.25V, Iout=10mA 45 110 uA F=120Hz,Cout=25uF( tan), Iout=5A,Vin-Vout=3V Adjust Pin Current Change 10mA≤Iout≤5A 1.5V≤Vin-Vout ≤6V Temperature Stability Iout=10mA, Vin-Vout=1.5V Thermal Resistance junction to case 60 dB 0.2 TO-252 TO-263 TO-220 12.5 3 3 5 uA 0.5 % ℃/W Note: Note1：The Parameters of Line Regulation and Load Regulation in Table1 are tested under constant junction temperature. Note2： When Iout varies between 0~5A,Vin-Vout varies between 1.5V~6V under constant junction temperature，the parameter is satisfied the criterion in table. If temperature varies between 0℃≤TA≤80℃，it needs output current to be larger than 10mA to satisfy the criterion. Note3：Dropout Voltage is tested under Iout=5A 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). 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. Detailed Description: BL1084 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 80℃ or output current is larger than 5.2A. 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. http://www.belling.com.cn - 5Total 13 Pages 5/8/2007 BL1084 Typical Application ： BL1084 has an adjustable version and fixed versions, Chart1 is its typical application： BL1084 BL1084 Typical Application of BL1084 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: 1/(2π*Fripple*Cadj)