1A Positive Voltage Regulators EC50117E GENERAL DESCRIPTION FEATURES The EC50117E series of high performance low dropout voltage regulators are designed for applications that require efficient conversion and fast transient response. In addition, EC50117E is designed to be stable under conditions where Cin and Cout are not present. However, it is recommended to include Cin and Cout in the system design as this will speed up the transient response and increase the PSRR rating. EC50117E is characterized under Junction Temperature from -40°C to +125°C. ● Low Dropout Performance. ● Low Quiescent Current：2.7mA（Typ.） ● Guaranteed 1A Output Current. ● Wide Input Supply Voltage Range. ● Stable operation without Cin and Cout. ● Over-temperature and Over-current Protection. ● Fixed or Adjustable Output Voltage. ● Available in SOT-223 and TO252 Packages. ● RoHS Compliant PIN ASSIGNMENT Applications Package: SOT223-3L ● Active SCSI Terminators. ● High Efficiency Linear Regulators. ● 5V to 3.3V Linear Regulators ● Motherboard Clock Supplies. Ordering Information Part Number EC50117EXXB7NR Package SOT223-3L Marking 117E-XX YWLLLLL Marking Information 1. 117E：Product Code 2. XX：is the output voltage code 18=1.8V 25=2.5V;33=3.3V;50=5.0V; AD=ADJ 3. YW：Manufacturing Date Code 4. LLLLL：Lot No E-CMOS Corp. (www.ecmos.com.tw) Page 1 of 6 4H14N-Rev. F001 1A Positive Voltage Regulators EC50117E Absolute Maximum Rating Symbol Parameter VIN Input Supply Voltage Maximum 18 Units V θJA Thermal Resistance Junction to Ambient (SOT223) 120 °C/W TJ Operating Junction Temperature Range -40 to 125 °C TSTG Storage Temperature Range -40 to 150 °C TLEAD Lead Temperature (Soldering 10 Sec) 260 °C Maximum Junction Temperature 150 °C TMJ 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. ELECTRICAL CHARACTERISTICS VIN,MAX ≤ 9V, VIN,MIN – VOUT = 2V, IOUT = 10mA, CIN = 10µF, COUT = 22µF, TA = 25°C, unless otherwise specified. Symbol VO Parameter Output Voltage Test Condition Min Typ Max EC50117E15 1.470 1.5 1.530 EC50117E18 1.764 1.8 1.836 EC50117E25 2.450 2.5 2.550 EC50117E33 3.234 3.3 3.366 EC50117E50 4.900 5.0 5.100 Units V VREF Reference Voltage (Adj. Voltage Version) (VIN - VOUT) = 1.5V IOUT = 10mA (-2%) 1.250 (+2%) V VSR Line Regulation VOUT + 1.5V < VIN < 9V IOUT = 10mA -- 0.3 -- %/V (VIN - VOUT) = 2.0V 10mA ≤ IOUT ≤ 1A -- 0.0001 -- %/mA Fixed Output Version -- 2.7 5 mA -- 50 120 μA VOUT + 1.5V < VIN < 9V -- 0.2 5 μA IOUT = 1A -- 1.38 1.49 V -- 0.4 5 mA 1 1.35 -- A (1) VLR Load Regulation IQ Quiescent Current IADJ (IGND) Adjust Pin Current （GND Current） ∆IADJ Adjust Pin Current Change VD IO ICL Dropout Voltage (1) (2) Minimum Load Current Current Limit E-CMOS Corp. (www.ecmos.com.tw) (1) Page 2 of 6 4H14N-Rev. F001 1A Positive Voltage Regulators EC50117E ELECTRICAL CHARACTERISTICS Symbol Parameter TC Temperature Coefficient OTP Thermal Protection VN RA Test Condition Min Typ Max Units -- 30 -- ppm/℃ /V VIN=9V, IOUT=10mA -- 175 -- °C RMS Output Noise TA = 25°C, 10Hz ≤ f ≤ 10kHz -- 0.003 -- %VO Ripple Rejection Ratio f = 120Hz, COUT = 22μF (Tantalum), (VIN - VOUT) = 3V, IOUT = 10mA -- 60 -- dB Notes: 1. Low duty cycle pulse testing with which TJ remains unchanged. 2. The dropout voltage is the input/output differential at which the circuit ceases to regulate against further reduction in input voltage. It is measured when the output voltage has dropped 98% from the nominal value obtained at VIN = VOUT +2V. Typical Application E-CMOS Corp. (www.ecmos.com.tw) Page 3 of 6 4H14N-Rev. F001 1A Positive Voltage Regulators EC50117E Application Hints The typical Linear regulator would require external capacitors to ensure stability. However, EC50117E is designed in such a way that these external capacitor can be omitted if the PCB layout is tight and system noise is not very high. For better transient and PSRR performance, the Input and Output capacitors are still recommended. Input Capacitor An input capacitor of 10μF is recommended. Ceramic or Tantalum can be used. The value can be increased without upper limit. Output Capacitor An output capacitor of 22uF is recommended for better transient and PSRR performance. It should be placed no more than 1 cm away from the VOUT pin, and connected directly between VOUT and GND pins. The value may be increased without upper limit. Thermal Considerations It is important that the thermal limit of the package is not exceeded. The EC50117E has built-in thermal protection. When the thermal limit is exceeded, the IC will enter protection, and VOUT will be pulled to ground. The power dissipation for a given application can be calculated as following: The power dissipation (PD) is PD = IOUT * [VIN – VOUT] The thermal limit of the package is then limited to PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction temperature, TA is the ambient temperature, and ΘJA is around 120°C/W for EC50117E.EC50117E is designed to enter thermal protection at 125°C. For example, if TA is 25°C then the maximum PD is limited to about 0.83W. In other words, if IOUT(MAX) = 500mA, then [VIN – VOUT] can not exceed 1.66V. (Ref. SOT223 without heat sink.) E-CMOS Corp. (www.ecmos.com.tw) Page 4 of 6 4H14N-Rev. F001 1A Positive Voltage Regulators EC50117E Typical Performance Characteristics Reference Voltage vs Junction Temperature Output Voltage vs Load Current Dropout Voltage vs Load Current PSRR vs Frequency Dropout Volatge VS Oueput Current E-CMOS Corp. (www.ecmos.com.tw) Adjus Pin Current VS Temperature Page 5 of 6 4H14N-Rev. F001 1A Positive Voltage Regulators EC50117E Typical Performance Characteristics Line Transient Response Short Transient Response Load Transient Response Short Circuit Start-up Transient Mechanical Dimensions OUTLINE DRAWING SOT223-3L E-CMOS Corp. (www.ecmos.com.tw) Page 6 of 6 4H14N-Rev. F001