TX1117-1.8

MEIRIT MT1117 1A Bipolar Linear Regulator Features  Maximum output current is 1.4A  Standby current: 2mA (typ.)  Range of operation input voltage: Max 15V  Load regulation: 0.2%/A (typ.)  Line regulation: 0.03%/V (typ.)  Environment Temperature: -20℃~85℃   DVD Decode Board ADSL Modem  Post Regulators For Switching Supplies Applications   Power Management for Computer Mother Board, Graphic Card LCD Monitor and LCD TV General Description MT1117 is a series of low dropout three-terminal regulators only two external resistors. with a dropout of 1.3V at 1A load current. MT1117 features MT1117 offers thermal shut down function, to assure the a very low standby current 2mA compared to 5mA of stability of chip and power system. And it uses trimming competitor. technique to guarantee output voltage accuracy within Other than a fixed version, Vout = 1.2V, 1.5V, 1.8V, 2.5V, 2%. Other output voltage accuracy can be customized on 2.85V，3.3V, and 5V, MT1117 has an adjustable version, demand, such as which can provide an output voltage from 1.25 to 12V with MT1117 is available in SOT-223, TO-252 power package. 1%. Typical Application Application circuit of MT1117 fixed version Ver1.7 1 Jul.01,2018 MEIRIT MT1117 1A Bipolar Linear Regulator Typical Electrical Characteristic Selection Table Marking Part No. Output Voltage XX=12 1.2V XX=15 1.5V XX=18 1.8V XX=28 2.85V XX=25 2.5V XX=33 3.3V XX=50 5.0V XX=AD Adj 1117 XX YYWW Ordering Information Marking 1117 XX YYWW Package SOT-223 TO-252 Designator Description 1117 Product code XX Output Voltage(1.2~12.0V) YYWW DATE CODE Note:”XX” stands for output voltages. Other voltages can be specially customized Parameters Description Temperature & Rohs Package type C:-40~85℃ ,Pb Free Rohs Std. L:SOT-223 O:TO-252 Packing type: TR: Tape & Reel (Standard) Voltage accuracy 2%(Customized) Ver1.7 2 Jul.01,2018 MEIRIT MT1117 1A Bipolar Linear Regulator Block Diagram Pin Configuration SOT223 (Top View) 4 Mark 1 2 3 Table1: MT1117 series (SOT223 PKG) PIN NO. PIN NAME FUNCTION 1 VSS/ADJ VSS/ADJ pin 2 VOUT Output voltage pin 3 VIN Input voltage pin 4 VOUT Output voltage pin TO252 (Top View) 2 Table2: MT1117 series (TO252 PKG) Mark 1 Ver1.7 PIN NO. PIN NAME FUNCTION 1 VSS/ADJ VSS/ADJ pin 2 VOUT Output voltage pin 3 VIN Input voltage pin 3 3 Jul.01,2018 MEIRIT MT1117 1A Bipolar Linear Regulator Absolute Maximum Ratings Max Input Voltage ·········································································································30V Max Operating Junction Temperature(Tj) ···········································································150℃ Ambient Temperature(Ta) ·······························································································-40℃~ 85℃ Storage Temperature(Ts) ································································································-40℃~150℃ Lead Temperature & Time·······························································································260℃ 10S 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 ··················································································· 15V Recommended operating junction temperature(Tj) ···································································· -20~125℃ Thermal Information Parameter Package Package thermal resistance Rating Unit SOT-223 20 ℃/W TO-252 12.5 ℃/W Electrical Characteristics TA=25℃, unless otherwise noted. Symbol Parameter Vref Reference voltage Conditions MT1117-Adj Min Typ Max Unit 1.225 1.25 1.275 V 1.176 1.2 1.224 V 1.47 1.5 1.53 V 1.764 1.8 1.836 V 2.45 2.5 2.55 V 2.793 2.85 2.907 V 3.234 3.3 3.366 V 4.9 5 5.1 V 0.03 0.2 %/V 10mA≤Iout≤1A , Vin=3.25V MT1117-1.2V 0≤Iout≤1A , Vin=3.2V MT1117-1.5V 0≤Iout≤1A , Vin=3.5V MT1117-1.8V Vout Output voltage 0≤Iout≤1A , Vin=3.8V MT1117-2.5V 0≤Iout≤1A , Vin=4.5V MT1117-2.85V 0≤Iout≤1A , Vin=4.85V MT1117-3.3V 0≤Iout≤1A , Vin=5.3V MT1117-5.0V 0≤Iout≤1A , Vin=7.0V MT1117-1.2V Ver1.7 4 Jul.01,2018 MEIRIT MT1117 1A Bipolar Linear Regulator Iout=10mA, 2.7V≤Vin≤10V MT1117-1.5V 0.03 0.2 %/V 0.03 0.2 %/V 0.03 0.2 %/V 0.03 0.2 %/V 0.03 0.2 %/V 0.03 0.2 %/V 0.03 0.2 %/V 2 8 mV 2 8 mV 2 8 mV 3 12 mV 4 16 mV 5 20 mV 6 24 mV 9 36 mV Iout =100mA 1.15 1.3 V Iout=1A 1.3 1.5 V MT1117-ADJ 2 10 mA MT1117-1.2V,Vin=10V 2 5 mA MT1117-1.5V,Vin=10V 2 5 mA Quiescent MT1117-1.8V,Vin=12V 2 5 mA Current MT1117-2.5V,Vin=12V 2 5 mA MT1117-2.85V,Vin=12V 2 5 mA Iout=10mA, 3.0V≤Vin≤10V MT1117-ADJ Iout=10mA, 2.75V≤Vin≤12V △Vout Line regulation MT1117-1.8V Iout=10mA, 3.3V≤Vin≤12V MT1117-2.5V Iout=10mA, 4.0V≤Vin≤12V MT1117-2.85V Iout=10mA, 4.35V≤Vin≤12V MT1117-3.3V Iout=10mA, 4.8V≤Vin≤12V MT1117-5.0V Iout=10mA, 6.5V≤Vin≤12V MT1117-1.2V Vin =2.7V, 10mA≤Iout≤1A MT1117-1.5V Vin =3.0V, 10mA≤Iout≤1A MT1117-ADJ Vin =2.75V, 10mA≤Iout≤1A △Vout Load regulation MT1117-1.8V Vin =3.3V, 10mA≤Iout≤1A MT1117-2.5V Vin =4.0V, 10mA≤Iout≤1A MT1117-2.85V Vin =4.35V, 10mA≤Iout≤1A MT1117-3.3 Vin =4.8V, 10mA≤Iout≤1A MT1117-5.0 Vin =6.5V, 10mA≤Iout≤1A Vdrop Imin Dropout voltage Minimum load current Iq Ver1.7 5 Jul.01,2018 MEIRIT MT1117 1A Bipolar Linear Regulator IAdj Adjust pin current Ichange Iadj change MT1117-3.3V,Vin=12V 2 5 mA MT1117-5.0V,Vin=12V 2 5 mA MT1117-ADJ 55 120 uA 0.2 10 uA Vin=5V,10mA≤Iout≤1A MT1117-ADJ Vin=5V,10mA≤Iout≤1A ΔV/ΔT ±100 Temperature 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 MT1117-ADJ will lead to unstable or oscillation output. Ver1.7 6 Jul.01,2018 MEIRIT MT1117 1A Bipolar Linear Regulator Detailed Description MT1117 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, 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 MT1117 has an adjustable version and six fixed versions (1.2V, 1.5V,1.8V, 2.5V, 2.85V , 3.3V and 5V) Fixed Output Voltage Version Application circuit of MT1117 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 MT1117-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 lower. As MT1117-ADJ can keep itself stable at load current about 2mA, R1 is not allowed to be higher than 625ohm. 2) Ver1.7 Using a bypass capacitor (CADJ) between the ADJ pin and ground can improve ripple rejection. 7 This bypass Jul.01,2018 MEIRIT MT1117 1A Bipolar Linear Regulator capacitor prevents ripple from being amplified as the output voltage is increased. The impedance of C ADJ should be less than R1 to prevent ripple from being amplified. As R1 is normally in the range of 100Ω~500Ω, the value of C ADJ should satisfy this equation: 1/(2π×fripple×CADJ)