LC1118CS8TRXXXX UMW | Alldatasheet
Document overview
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Technical content
Range of operation input voltage: Max 15V LC1118 Dual 1A Low Dropout Regulator
DESCRIPTION
is a dual channel low-dropout regulator that delivers a maximum current of 1 A for each individual output. Typical dropout voltage at 1A load current is 1.3V. Each individual output voltage can be set independently as fixed voltage ( e.g 1.2V, 1.8V, 2.5V, 3.3V, 5V) or adjustable output which can provide an output voltage from 1.25 to 12V with two external resistors. The output accuracy of each channel is set within 2% by trimming. offers thermal shut down and current limit functions to ensure reliability of device and power system. Package input/output pin configuration can be customized on demand ( i.e both output can share one input to save one input capacitor and corresponding PCB real estate). is available in lead (Pb)-free ESOP-8(with exposed pad for heat dissipation) package.
FEATURES
Dual channel output with each individual output can be either fixed output version or adjustable version. Maximum output current for each channel is 1A Standby current of each output: 2mA (typ.) Line regulation: 0.1%/V (typ.) Load regulation: 10mV (typ.) Environment Temperature: -20C~85C 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 Fig.1. Typical Application of 1111111 LC1118CS8TR1833 LC1118CS8TR1833 LC1118 LC1118 LC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXX
ORDERING INFORMATION
□1 Temperature&Rohs: C:-40~85C , Pb Free Rohs Std. □2 Package type: S8: ESOP-8 □3 Packing type: TR: Tape&Reel (Standard) CH1 Output voltage: e.g. 33=3.3V AD=ADJ CH2 Output voltage: e.g. 33=3.3V AD=ADJ MARKING DESCRIPTON Marking CS8TR□□□□
1118 Product Code
LLLL Lot No. XXYY XX： Vo1 Output Voltage YY： Vo2 Output Voltage PIN CONFIGURATION PIN Symbol Description
1 GND Ground
2 Vin1 Channel 1 Input
3 GND Ground
4 Vin2 Channel 2 Input
5 Vout2 Channel 2 Output
6 Vout2 Channel 2 Output
7 Vout1 Channel 1 Output
8 Vout1 Channel 1 Output
Operating Junction Temperature(Tj) 125C Ambient Temperature(Ta) -20C -85C Package Thermal Resistance (jc) ESOP8 10C / W Storage Temperature(Ts) -40C -150C Lead Temperature & Time 260C,10S Note: 1) Exceed these limits to damage to the device. 2) Exposure to absolute maximum rating conditions may affect device reliability. RECOMMENDED WORK CONDITIONS Parameter Value Input Voltage Range Max. V Ambient Temperature -20C ～ 85C 22222 LC1118 LC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXX
ELECTRICAL CHARACTERISTICS
*For each individual channel output Test Conditions: Cin=0.1uF, Cout=10uF, TA=25 C, unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Vref Reference Voltage -ADJ 1.225 1.25 1.275 V 10mA≤Iout≤1A , Vin=3.25V Vout Output Voltage -5.0V 4.9 5 5.1 V 0≤Iout≤1A , Vin=7.0V ΔVout Line Regulation -1.2V 0.1 0.2 %/V Iout=10mA, 2.7V≤Vin≤10V -ADJ 0.1 0.2 %/V Iout=10mA, 2.75V≤Vin≤12V -1.8V 0.1 0.2 %/V Iout=10mA, 3.3V≤Vin≤12V -2.5V 0.1 0.2 %/V Iout=10mA, 4.0V≤Vin≤12V -3.3V 0.1 0.2 %/V Iout=10mA, 4.8V≤Vin≤12V -5.0V 0.1 0.2 %/V Iout=10mA, 6.5V≤Vin≤12V ΔVout Load Regulation -1.2V 10 30 mV Vin =2.7V, 10mA≤Iout≤1A -ADJ 10 30 mV Vin =2.75V, 10mA≤Iout≤1A -1.8V 10 30 mV Vin=3.3V, 10mA≤Iout≤1A -2.5V 10 30 mV Vin=4.0V, 10mA≤Iout≤1A -3.3V 10 30 mV Vin=4.8V, 10mA≤Iout≤1A -5.0V 10 30 mV Vin=6.5V, 10mA≤Iout≤1A 333333 LC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXX
ELECTRICAL CHARACTERISTICS continued Symbol Parameter Conditions Min Typ Max Unit Vdrop Dropout Voltage Iout=100mA 1.23 1.3 V Iout=1A 1.3 1.5 V Ilimit Current Limit Vin-Vout=2V, Tj=25° C 1 A Imin Minimum Load Current -ADJ 2 10 mA Iq Quiescent Current -1.2V, Vin =10V 2 5 mA -1.8V, Vin =12V 2 5 mA -2.5V,Vin =12V 2 5 mA -3.3V, Vin =12V 2 5 mA -5.0V, Vin =12V 2 5 mA IAdj Adjust Pin Current -ADJ 55 120 uA Vin =5V, 10mA≤Iout≤1A Ichange Iadj change -ADJ 0.2 10 uA Vin =5V, 10mA≤Iout≤1A ΔV/ΔT Temperature coefficient ±100 ppm JA Junction-Ambient Thermal Resistance ESOP-8 63 ° C/W Note: 1) All test are conducted under ambient temperature 25° C and within a short period of time 20ms 2) Load current smaller than minimum load current of -ADJ will lead to unstable or oscillation output. 44444 LC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXX
Fig.2 Block Diagram for each individual Channel DETAILED DESCRIPTION is a series of dual channel low -dropout regulator that delivers a maximum current of 1A for each individual output. Typical dropout voltage at 1A load current is 1.3V. Each individual output voltage can be an output voltage ranges from 1.25 to 12V with two external resistors. The output accuracy of each channel is set within 2% by trimming. The device has build-in modules including start-up circuit, bias circuit, bandgap, thermal shutdown, current limit, power transistors and driver circuit. Thermal shut down and current limit functions ensure reliability of device and power system. The bandgap module provides stable reference voltage whose temperature coefficient is compensated by careful design considerations. The temperature coefficient is under 100 ppm/°C. The accuracy of output voltage is guaranteed by trimming technique. Package input/output pin configuration can be customized on demand ( i.e both output can share one input to save one input capacitor and corresponding PCB real estate). is available in lead (Pb)-free ESOP-8 package. 55555 LC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXX
Fig.3. Typical Application Schematic of input and output capacitors of each channel can be either tantalum, electrolytic or ceramic capacitor. Figure 3 shows both fixed voltage and adjustable voltage application schematic. Channel 1 (designated as pin 1\\2\\7\\8) is a typical application of fixed voltage. Channel 2 (designated as pin 3\\4\\5\\6) is the schematic of adjustable version application. The adjustable version provides a 1.25V reference voltage with regard to its ADJ pin (shown as PIN 5 \\6 as its output and PIN3 as its adjustable pin in Fig.3). The output voltage of adjustable version follows the equation: Vout=1.25(1+R2/R1)+IAdjR2. We can ignore I Adj because IAdj (about 50uA) is much less than the current of R1 ( in the order of several milliamps). 1) To meet the minimum load current (>10mA) requirement, R1 is recommended to be 125ohm or lower. 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 C ADJ should be less than R1 to prevent ripple from being amplified. As R1 is norm ally in the range of 100Ω~500Ω, the value of CADJ should satisfy this equation: 1/(2 fripple CADJ)<R1. THERMAL CONSIDERATIONS Thermal consideration has to be taken account into to ensure proper function of the device. Power dissipation of can be calculated as Power Dissipation = (Vin1-Vout1)×Iout1+ (Vin2-Vout2)×Iout2 For proper function and safe operation of the device, power dissipation is recommended to be limited within 2W. 66666666 LC1118 LC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXX
TYPICAL PERFORMANCE CHARACTERISTICS T=25° C unless specified. Line Regulation Load Regulation Dropout Voltage Thermal performance with OTP 0.3 0.6 0.9 1.2 1.5 Vout(V) Vin (V) LC1117 ADJ Vout Vs. Vin 0.3 0.6 0.9 1.2 1.5 0.2 0.4 0.6 0.8 1.2 Vout(V) Iout (A) LC1117 ADJ Vout Vs. Iout 0.3 0.6 0.9 1.2 1.5 0.2 0.4 0.6 0.8 1.2 Dropout voltage (V) Iout (A) LC1117 ADJ Dropout Vs. Iout 0.3 0.6 0.9 1.2 1.5 100 150 200 Vout(V) Temperature ( LC1117 ADJ Vout Vs. Temp ADJ Vout Vs. Vin ADJ Dropout Vs. Iout ADJ Vout Vs. Temp ADJ Vout Vs. Iout 77777 LC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXX
Package ESOP-8 Devices per reel 2500Pcs Unit mm Package specification： LC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXXLC1118CS8TRXXXX