EC50117S 1A Low Dropout Positive Voltage Regulator GENERAL DESCRIPTION FEATURES The EC50117S series of positive adjustable and fixed regulators are designed to provide 1A with high efficiency. All internal circuitry is designed to operate down to 1.4V input to output differential. On-chip trimming adjusts the reference voltage to 1%. Current limit the typical value of 1.5A allows to minimizing the stress on both the regulator and the power source circuitry under overload conditions. ● Adjustable or Fixed Voltage. ● Output current of 1A. ●Low Dropout Voltage 1.2V(Typ.) at 1A Output Current. ● 0.04% Line Regulation ● 0.2 % Load Regulation ● 100% Thermal Limit Burn-In ● Fast Transient Response ● Current-Limit : 1A Typ. at TJ = 25°C ● On-Chip Thermal Limiting : 150°C Typ. PIN ASSIGNMENT Applications Package: SOT223-3L ● Efficiency Linear Regulators ● Post Regulators for Switching Supplies ● Adjustable Power Supply Typical Application Circuits Fixed Voltage Regulator Adjustable Voltage Regulator Notes： 1.) C1 need if device is far from filter capacitors 2.) C2 minimum value required for stability. E-CMOS Corp. (www.ecmos.com.tw) VOUT=VREF x(1+R2/R1)+IADJxR2 Page 1 of 8 5F03N-Rev. F002 EC50117S 1A Low Dropout Positive Voltage Regulator Ordering Information Part Number EC50117SXXB7NR Package SOT223-3L Marking 1117SXX LLLLLLLL DDT Marking Information 1. 1117S：Product Code 2. XX：is the output voltage code 12=1.2V;18=1.8V 25=2.5V;33=3.3V; 50=5.0V;A=ADJ 3. LLLLLLLL：Lot No 4. DD：Manufacturing Date Code 5. T：Internal tracking Code ABSOLUTE MAXIMUM RATINGS Characteristics DC Supply Voltage Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 Sec Electrostatic Discharge Sensitivity Symbol Maximum Unit VIN TOPR TSTG TLEAD H.B.M 20 -40 to +125 -65 to 150 300 3 V °C °C °C KV/Min Thermal Resistance Junction to Ambient SOT223-3L θJA 135 °C/W Thermal Resistance Junction to Case SOT223-3L θJC 27 °C/W Internal Power Dissipation SOT223-3L PD 0.74 W CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. E-CMOS Corp. (www.ecmos.com.tw) Page 2 of 8 5F03N-Rev. F002 EC50117S 1A Low Dropout Positive Voltage Regulator ELECTRICAL CHARACTERISTICS (ILOAD=0mA, Tj=25℃,unless otherwise noted.) Parameter Test Conditions VIN=VOUT+1.5V, Variator from nominal VOUT All fixed version Output Voltage EC50117S-1.2V Output Voltage EC50117S-ADJ Min -1.5 Typ Max 1.5 Units % 1.5V≦VIN-VOUT≦10V, ILOAD=0mA to 1A,Variator from nominal VOUT (★) -2 +2 % 1.5V≦VIN-VOUT≦10V, ILOAD=0mA to 1A,Variator from nominal VOUT (★) -3 +2 % Maximum PD<2.25W VIN=+5V,ILOAD=10mA 1.25 1.232 1.25 14.6 1.268 V V 1.5V≦VIN-VOUT≦10V,ILOAD=10mA to 1A(★) 1.225 1.25 1.275 V -0.6 0 +0.6 % Reference Voltage (Note 1) EC50117S-ADJ Output Voltage Accuracy(at wafer testing) All VIN=VOUT+1.5V, ILOAD=10mA Line Regulation ALL 1.5V≦VIN-VOUT≦10V, ILOAD=10mA (★) 0.04 0.238 % ALL VIN=VOUT+1.5V, ILOAD=10mA to 1A(★) 0.2 0.4 % EC50117S-ADJ VIN=+5V,VADJ=0V(★) VIN=VOUT+1.5V ILOAD=10mA to 1A(★) 2 7 mA 3.5 10 mA 35 60 μA 1.5 1 2 A A Load Regulation (Note 1) Minimum Load Current Ground Pin Current Adjust pin current All fixed version EC50117S-ADJ 1.5V≦VIN-VOUT≦10V,ILOAD=10mA (★) Current Limit All VIN-VOUT=1.5V(★) Tj=25℃ 1 Ripple Rejection (Note 2) All VIN-VOUT=2.5V, ILOAD=1A 60 Dropout voltage (Note 1,3) All ILOAD=1A(★) Temperature coefficient All VIN-VOUT=1.5V,ILOAD=10mA(★) On-chip Thermal Limit All dB 1.2 1.4 V 0.015 %/℃ 150 The”(★) “ denotes the specification which apply over the full operating junction temperature range, -40℃~125℃ Note： 1. Low duty pulse testing with Kelvin connections requires. 2. 120Hz input ripple (CADJ for ADJ=25uF) 3. △VOUT,△VREF=1% E-CMOS Corp. (www.ecmos.com.tw) Page 3 of 8 5F03N-Rev. F002 ℃ EC50117S 1A Low Dropout Positive Voltage Regulator Typical Characteristics E-CMOS Corp. (www.ecmos.com.tw) Page 4 of 8 5F03N-Rev. F002 EC50117S 1A Low Dropout Positive Voltage Regulator E-CMOS Corp. (www.ecmos.com.tw) Page 5 of 8 5F03N-Rev. F002 EC50117S 1A Low Dropout Positive Voltage Regulator APPLICATION INFORMATION Output Voltage The EC50117S develops a 1.25V reference voltage between the output and the adjust terminal. By placing a resistor between these two terminals, a constant current is caused to flow through R1 and down through R2 to set the overall output voltage. Normally, this current is chosen to be the specified minimum load current of 10mA. For fixed voltage devices R1 and R2 are included in the device. Load Regulation When the adjustable regulator is used, load regulation will be limited by the resistance of the wire connecting the regulator to the load. The data sheet specification for load regulation is measured at the output pin of the device. Best load regulation is obtained when the top of the resistor divider (R1) is tied directly to the output pin of the device not to the load. For fixed voltage, devices the top of R1 is internally connected to the output, and the ground pin can be connected to low side of the load. If R1 is connected to the load, RP is multiplied by the divider ratio, the effective resistance between the regulator and the load would be: RP × (1 + R2/R1), RP = Parasitic Line Resistance E-CMOS Corp. (www.ecmos.com.tw) Page 6 of 8 5F03N-Rev. F002 EC50117S 1A Low Dropout Positive Voltage Regulator Input Capacitor An input capacitor of 10μF or greater is recommended. Tantalum or aluminum electrolytic capacitors can be used for bypassing. Larger Values will improve ripple rejection by bypassing the input to the regulator. Output Capacitor The EC50117S requires an output capacitor to maintain stability and improve transient response. Proper capacitor selection is important to ensure proper operation. The EC50117S output capacitor selection is dependent upon the ESR (equivalent series resistance) of the output capacitor to maintain stability. When the output capacitor is 10μF or greater, the output capacitor should have an ESR less than 1Ω. This will improve transient response as well as promote stability. A low-ESR solid tantalum capacitor works extremely well and provides good transient response and stability over temperature. Aluminum electrolytics can also be used, as long as the ESR of the capacitor is <1Ω. The value of the output capacitor can be increased without limit. Higher capacitance values help to improve transient response and ripple rejection and reduce output noise. Ripple Rejection The curves for Ripple Rejection were generated using an adjustable device with the adjust pin bypassed. With a 25μF bypassing capacitor, 75dB ripple rejection is obtainable at any output level. The impedance of the adjust pin capacitor, at the ripple frequency, should be <R1. R1 is normally in the range of 100W to 200W. The size of the required adjust pin capacitor is the function of the input ripple frequency. At 120Hz, with R1=100Ω, the adjust pin capacitor should be 13μF. For fixed voltage devices and adjustable devices without an adjust pin capacitor, the output ripple will increase as the ratio of the output voltage to the reference voltage (VOUT /VREF). E-CMOS Corp. (www.ecmos.com.tw) Page 7 of 8 5F03N-Rev. F002 EC50117S 1A Low Dropout Positive Voltage Regulator Mechanical Dimensions OUTLINE DRAWING SOT223-3L Symbol Dimensions in mm Min Max A 1.400 1.800 A1 0.000 0.120 B 3.300 3.700 b 0.600 0.840 b1 2.900 3.150 C 6.700 7.300 D 6.200 6.700 e E-CMOS Corp. (www.ecmos.com.tw) 2.300 BSC H 0.230 0.350 L 1.500 2.000 L1 0.750 1.150 Page 8 of 8 5F03N-Rev. F002