BCT1117ELT18-TR

Ver 1.3 BCT1117 1A Bipolar Linear Regulator Features Description      BCT1117 is a series of low dropout three-terminal regulators with a dropout of 1.3V at 1A load current. BCT1117 features a very low standby current 2mA compared to 5mA of competitor. Other than a fixed version, Vout = 1.2V, 1.8V, 2.5V, 3.3V, 5V, and 12V, BCT1117 has an adjustable version, which can provide an output voltage from 1.25 to 12V with only two external resistors. BCT1117 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%. Other output voltage accuracy can be customized on demand, such as 1%. BCT1117 is available in SOT-223, TO-252 power package. Maximum output current is 1A Range of operation input voltage: Max 15V Line Regulation: 0.1%/V(typ.) Standby current: 2mA(typ.) Load Regulation: 10mV(typ.) Environment Temperature:-20℃-85℃  Applications Power Management for Computer Mother Board, Graphic Card LCD Monitor and LCD TV DVD Decode Board ADSL Modem Post Regulators For Switching Supplies Pin Configurations (Top View) SOT-223-3 TOP VIEW Tab is Vout 1:Vss/ADJ 2:Vout 3:Vin MARKING 2 1 3 1 TO-252-3 TOP VIEW Tab is Vout MARKING 1:Vss/ADJ 2:Vout 3:Vin 2 3 Pin Functions PIN I/O DESCRIPTION Name TO-252 SOT-223 ADJ/GND1 1 1 - VIN 3 3 I Input voltage pin for the regulator. VOUT 2, Tab 2, Tab O Output voltage pin for the regulation. www.broadchip.com Adjust pin for adjustable output option. Ground Pin for fixed output. 1 Ver 1.3 Ordering Information Part 1 BCT1117ELTXX -TR 1 BCT1117EOTXX -TR Pin-Package SOT-223-3 TO-252-3 Temp-Range -40°C to +85°C -40°C to +85°C Top Mark 1117 1117 Supplied as: 3000units/Tape & Reel 3000units/Tape & Reel Note 1: XX:voltage version(12:1.2V, 15:1.5V, 18:1.8V, 25:2.5V, 33:3.3V, 50:5.0V, 120:12V, ADJ:Adjustable) Typical Application Circuit Selection Table Marking Part No. Output Voltage XX=12 1.2V XX=18 1.8V 1117 XX=25 2.5V XXYYZZ XX=33 3.3V XX=50 5.0V XX=120 12.0V XX=ADJ Adjustable Package SOT-223 TO-252 ORDERING INFORMATION Marking Designator 1117 1117 XXYYZZ Description Product code XX Output Voltage(1.2~12.0V) YY DATE CODE (YEAR) ZZ DATA CODE (WEEK) Note:”XX” stands for output voltages. Other voltages can be specially customized Parameters Description Temperature&Rohs C:-40~85℃, Pb Free Rohs Std. Package type L:SOT-223 O:TO-252 PIN number 3 Packing type: TR: Tape&Reel (Standard) Voltage accuracy 1%(Customized) www.broadchip.com 2 Ver 1.3 Block Diagram Absolute Maximum Ratings Max Input Voltage …………………………………… 15V Storage Temperature(Ts) ………… -40℃~150℃ Max Operating Junction Temperature(Tj) ……… 150℃ Lead Temperature & Time ………… 260℃(10S) Ambient Temperature(Ta) ………………… -40℃~ 85℃ Caution: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability. RECOMMENDED WORK CONDITIONS Recommended maximum input voltage…………………………………………………………………………………… 12V Recommended operating junction temperature(Tj)…………………………………………………………………… -20~125℃ Exceptional foBCT1117-12V, the maximum input voltage for BCT1117-12V is 20V. Thermal Information Parameter Package Rating Unit Package thermal resistance SOT-223 20 ℃/W TO-252 12.5 ℃/W www.broadchip.com 3 Ver 1.3 Electrical Characteristics (CIN=10uF, COUT=10uF, TA = 25℃, unless otherwise specified.) Symbol Vref Parameter Conditions Reference BCT1117-ADJ voltage 10mA≤Iout≤1A , Vin=3.25V BCT1117-1.2V 0≤Iout≤1A , Vin=3.2V BCT1117-1.8V 0≤Iout≤1A , Vin=3.8V BCT1117-2.5V Vout Output 0≤Iout≤1A , Vin=4.5V voltage BCT1117-3.3V 0≤Iout≤1A , Vin=5.3V BCT1117-5.0V 0≤Iout≤1A , Vin=7.0V BCT1117-12.0V 0≤Iout≤1A , Vin=14V BCT1117-1.2V Iout=10mA, 2.7V≤Vin≤10V BCT1117-ADJ Iout=10mA, 2.75V≤Vin≤12V BCT1117-1.8V Iout=10mA, 3.3V≤Vin≤12V △Vout Line BCT1117-2.5V regulation Iout=10mA, 4.0V≤Vin≤12V BCT1117-3.3V Iout=10mA, 4.8V≤Vin≤12V BCT1117-5.0V Iout=10mA, 6.5V≤Vin≤12V BCT1117-1.8V Iout=10mA, 13.5V≤Vin≤20V www.broadchip.com Min Typ Max Unit 1.225 1.25 1.275 V 1.176 1.2 1.224 V 1.764 1.8 1.836 V 2.45 2.5 2.55 V 3.234 3.3 3.366 V 4.9 5 5.1 V 11.76 12 12.24 V 0.1 0.2 %/V 0.1 0.2 %/V 0.1 0.2 %/V 0.1 0.2 %/V 0.1 0.2 %/V 0.1 0.2 %/V 0.1 0.2 %/V 4 Ver 1.3 (CONTINUED) Symbol Parameter Conditions Min BCT1117-1.2V Vin =2.7V, 10mA≤Iout≤1A BCT1117-ADJ Vin =2.75V, 10mA≤Iout≤1A BCT1117-1.8V Vin =3.3V, 10mA≤Iout≤1A △Vout Load BCT1117-2.5V regulation Vin =4.0V, 10mA≤Iout≤1A BCT1117-3.3 Vin =4.8V, 10mA≤Iout≤1A BCT1117-5.0 Vin =6.5V, 10mA≤Iout≤1A BCT1117-12.0V Vin =13.5V, 10mA≤Iout≤1A Vdrop Ilimit Imin Iq IAdj Ichange ΔV/ΔT Typ Max Unit 10 30 mV 10 30 mV 10 30 mV 10 30 mV 10 30 mV 10 30 mV 10 30 mV Dropout Iout =100mA 1.23 1.3 V voltage Iout=1A 1.3 1.5 V Current limit Vin-Vout=2V;Tj =25℃ Minimum 1 A BCT1117-ADJ 2 10 mA BCT1117-1.2V,Vin=10V 2 5 mA BCT1117-1.8V,Vin=12V 2 5 mA Quiescent BCT1117-2.5V,Vin=12V 2 5 mA Current BCT1117-3.3V,Vin=12V 2 5 mA BCT1117-5.0V,Vin=12V 2 5 mA BCT1117-12.0V,Vin=20V 2 5 mA 55 120 uA 0.2 10 uA load current Adjust pin BCT1117-ADJ current Vin=5V,10mA≤Iout≤1A Iadj change BCT1117-ADJ Vin=5V,10mA≤Iout≤1A Temperature ±100 ppm coefficien θJC Thermal SOT-223 20 resistance TO-252 10 ℃/W Note1: All test are conducted under ambient temperature 25°C and within a short period of time 20ms Note2: Load current smaller than minimum load current of BCT1117-ADJ will lead to unstable or oscillation output. www.broadchip.com 5 Ver 1.3 DETAILED DESCRIPTION BCT1117 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 modules can assure chip and its application system working safety when the junction temperature is larger than 140°C. The bandgap module provides stable reference voltage, whose temperature coefficient is compensated by careful design considerations. The temperature coefficient is under 100 ppm/°C. And the accuracy of output voltage is guaranteed by trimming technique. TYPICAL APPLICATION BCT1117 has an adjustable version and six fixed versions (1.2V, 1.8V, 2.5V, 3.3V, 5V and 12V) Fixed Output Voltage Version Application circuit of BCT1117 fixed version 1) Recommend using 10uF tan capacitor as bypass capacitor (C1) for all application circuit. 2) Recommend using 10uF tan capacitor to assure circuit stability. Adjustable Output Voltage Version Application Circuit of BCT1117-ADJ The output voltage of adjustable version follows the equation: Vout=1.25×(1+R2/R1)+IAdj×R2. We can ignore IAdj because IAdj (about 50uA) is much less than the current of R1 (about 2~10mA). 1) To meet the minimum load current (>10mA) requirement, R1 is recommended to be 125ohm or www.broadchip.com 6 Ver 1.3 lower. As BCT1117-ADJ can keep itself stable at load current about 2mA, R1 is not allowed to be higher than 625ohm. 2) Using a bypass capacitor (CADJ) between the ADJ pin 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 R1 to prevent ripple from being amplified. As R1 is normally in the range of 100Ω~500Ω, the value of CADJ should satisfy this equation: 1/(2π×fripple×CADJ)