LC1117CLTR33

LC1117 1A Bipolar Linear Regulator DESCRIPTION FEATURES LC1117 is a series of low dropout three-terminal regulators with a dropout of 1.3V at 1A load current. LC1117 features a low standby current 2mA. Other than a fixed version (Vout = 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V, and 12V), LC1117 has an adjustable version, which can provide an output voltage from 1.25 to 12V with only two external resistors. LC1117 offers thermal shut down and current limit functions, to assure stability of chip and power system. Trimming technique is used to guarantee output voltage accuracy within 2%. Other output voltage accuracy such as 1% can be customized on demand. LC1117 is available in SOT-223, TO-252 power packages.  Other than a fixed version and an adjustable version, output value can be customized on demand. Maximum output current is 1A Range of operation input voltage: Max 18V Standby current: 2mA (typ.) Line regulation: 0.1%/V (typ.) Load regulation: 10mV (typ.) Environment Temperature: -40C~85C Compatible with tantalum capacitor, electrolytic capacitor and MLCC.        APPLICATIONS  Power Management for Computer Mother Board, Graphic Card LCD Monitor and LCD TV DVD Decode Board ADSL Modem Post Regulators for Switching Supplies     TYPICAL APPLICATION TYPICAL ELECTRICAL CHARACTERISTIC LC1117 Vin 10uF Gnd LC1117-ADJ Vout Vs. Temp Vout Vout 1.5 10uF Vout (V) Vin Application circuit of LC1117 fixed version 1.0 0.5 0.0 -50 50 150 250 Temperature (C) www.leadchip.com 1 Your final power solution LC1117 ORDERING INFORMATION PIN CONFIGURATION LC1117 □ 1□ 2□ 3□ 4□ 5 Code Product Classification Marking 1117: Product Code B: Fab Code 1117 B XX: XXYYZZ Output Voltage YY: Lot No. ZZ: Date Code Product Classification 1117: Product Code B:Fab Code 1117 B XX: XXYYZZ Output Voltage YY:Lot No. □1 □2 □3 □4 □5 Description Temperature&Rohs: C:-40~85C ,Pb Free Rohs Std. Package type: L:SOT-223 O:TO-252 Packing type: TR:Tape&Reel (Standard) Output voltage: e.g. 12=1.2V 15=1.5V 18=1.8V 25=2.5V 33=3.3V 50=5.0V 120=12V AD=Output adjustable Voltage accuracy: 1=±1%(Customized) Blank(default)=±2% LC1117CLTR□ 4□ 4 LC1117COTR□ 4□ 4 ZZ:Date Code Vss/Adj Vin Vout TO-252 1 Vss/ADJ 2 Vout 3 Vin 1117 B XX YYZZ 2 1 3 Ground Pin/Adjustable Supply Voltage Input Output Voltage ABSOLUTE MAXIMUM RATING Parameter Value 18V 150C -40C – 85C 20C / W 12.5C / W -40C - 150C 260C, 10S Max Input Voltage Max Operating Junction Temperature(Tj) Ambient Temperature(Ta) SOT-223 Package Thermal Resistance(jc) TO-252 Storage Temperature(Ts) Lead Temperature & Time Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability. RECOMMENDED WORK CONDITIONS Parameter Value Max. 16V -40C –125C Input Voltage Range Operating Junction Temperature(Tj)  Exceptional for LC1117-12V, the maximum input voltage for LC1117-12V is 20V. www.leadchip.com 2 Your final power solution LC1117 ELECTRICAL CHARACTERISTICS Tj=25C Symbol Vref Vout ΔVout ΔVout Parameter Reference Voltage Output Voltage Line Regulation Load Regulation www.leadchip.com Conditions LC1117-ADJ 10mA≤Iout≤1A , Vin=3.25V LC1117-1.2V 0≤Iout≤1A , Vin=3.2V LC1117-1.5V 0≤Iout≤1A , Vin=3.5V LC1117-1.8V 0≤Iout≤1A , Vin=3.8V LC1117-2.5V 0≤Iout≤1A , Vin=4.5V LC1117-3.3V 0≤Iout≤1A , Vin=5.3V LC1117-5.0V 0≤Iout≤1A , Vin=7.0V LC1117-12.0V 0≤Iout≤1A , Vin=14V LC1117-1.2V Iout=10mA, 2.7V≤Vin≤15V LC1117-ADJ Iout=10mA, 2.75V≤Vin≤16V LC1117-1.5V Iout=10mA, 3.0V≤Vin≤16V LC1117-1.8V Iout=10mA, 3.3V≤Vin≤16V LC1117-2.5V Iout=10mA, 4.0V≤Vin≤16V LC1117-3.3V Iout=10mA, 4.8V≤Vin≤16V LC1117-5.0V Iout=10mA, 6.5V≤Vin≤16V LC1117-12.0V Iout=10mA, 13.5V≤Vin≤20V LC1117-ADJ Vin =2.7V, 10mA≤Iout≤1A LC1117-ADJ Vin =2.75V, 10mA≤Iout≤1A LC1117-1.5V Vin=3.0V, 10mA≤Iout≤1A LC1117-1.8V Vin=3.3V, 10mA≤Iout≤1A LC1117-2.5V Vin=4.0V, 10mA≤Iout≤1A LC1117-3.3V Vin=4.8V, 10mA≤Iout≤1A LC1117-5.0V Vin=6.5V, 10mA≤Iout≤1A LC1117-12.0V Vin=13.5V, 10mA≤Iout≤1A 3 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 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 0.1 0.2 %/V 10 30 mV 10 30 mV 10 30 mV 10 30 mV 10 30 mV 10 30 mV 10 30 mV 10 30 mV Your final power solution LC1117 ELECTRICAL CHARACTERISTICS continued Tj=25C Symbol Parameter Conditions Min Typ Max Unit Iout=100mA 1.23 1.3 V Iout=1A 1.3 1.5 V Vdrop Dropout Voltage Ilimit Current Limit Vin-Vout=2V, Tj=25°C Imin Minimum Load Current LC1117-ADJ 2 10 mA LC1117-1.2V, Vin =10V 2 5 mA LC1117-1.5V, Vin =12V 2 5 mA LC1117-1.8V, Vin =12V 2 5 mA LC1117-2.5V,Vin =12V 2 5 mA LC1117-3.3V, Vin =12V 2 5 mA LC1117-5.0V, Vin =12V 2 5 mA LC1117-12.0V, Vin =20V 2 5 mA 55 120 uA 0.2 10 uA Iq IAdj Quiescent Current Adjust Pin Current Ichange Iadj change ΔV/ΔT Temperature coefficient JC Thermal Resistance LC1117-ADJ Vin =5V, 10mA≤Iout≤1A LC1117-ADJ Vin =5V, 10mA≤Iout≤1A 1 A ±100 SOT-223 20 TO-252 10 TO-220 4.5 ppm °C/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 LC1117-ADJ will lead to unstable or oscillation output. BLOCK DIAGRAM www.leadchip.com 4 Your final power solution LC1117 DETAILED DESCRIPTION LC1117 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 LC1117 has an adjustable version and six fixed versions (1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V and 12V) Fixed Output Voltage Version LC1117 Vin Vin 10uF Vout Vout 10uF Gnd Application circuit of LC1117 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 LC1117-ADJ provides a 1.25V reference voltage. Any output voltage between 1.25V~12V can be achievable by choosing two external resistors (schematic is shown below), R1 and R2 LC1117-ADJ Vin Vin 10uF Vout Vout ADJ R1 10uF R2 Application Circuit of LC1117-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). www.leadchip.com 5 Your final power solution LC1117 1) To meet the minimum load current (>10mA) requirement, R1 is recommended to be 125ohm or lower. As LC1117-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/(2frippleCADJ)