1.5A Low Dropout Linear Regulator General Description EC8812 Features dropout linear regulators are designed for portable Typical 150mV Dropout Voltage at 500mA. consumption and low dropout voltage. Each device contains a bandgap voltage reference, an error amplifier, a PMOS power transistor, and current limit and Excellent Line and Load Regulation. The EC8812 series of fixed output ultra low battery powered applications, which require low power temperature limit protection circuits. The EC8812 is designed to work with low cost Output Voltages：0.8V to 3.9V（0.1V Step） High Accuracy Output Voltage of 2%. Ultra-Low Ground Current at 150μA (Typ.) Thermal and Over-Current Protection. Short Circuit Protection Standard SOT-223 and TO-252 Package. electrolytic and ceramic capacitors and requires a minimum output capacitor of 10μF. E-CMOS Corp. (www.ecmos.com.tw) Applications USB removable devices MPEG4 devices Wireless LAN’s Hand-Held Instrumentation. Portable DVD players Digital camera Page 1 of 10 5J19N-Rev.F002 1.5A Low Dropout Linear Regulator EC8812 Typical Application Pin Configurations E-CMOS Corp. (www.ecmos.com.tw) Page 2 of 10 5J19N-Rev.F002 EC8812 1.5A Low Dropout Linear Regulator Pin Description Pin Name Pin Function Description GND Ground OUT Output Voltage IN Input Voltage Functional Block Diagram Vin Voltage Reference OverTemperature Protection Short Circuit Protection Vout OverCurrent Protection GND E-CMOS Corp. (www.ecmos.com.tw) Page 3 of 10 5J19N-Rev.F002 1.5A Low Dropout Linear Regulator EC8812 Ordering Information 1. SOT223 Package 2. TO252-3L Package E-CMOS Corp. (www.ecmos.com.tw) Page 4 of 10 5J19N-Rev.F002 EC8812 1.5A Low Dropout Linear Regulator Marking Information： 1. SOT223： Device EC8812NNAB7R EC8812NNBB7R Marking Package Type Information (Pin Type) 12NNA SOT223 LLLLLL (Pin Type：A Type) 12NNB SOT223 LLLLLL (Pin Type：A Type) Marking Package Type Information (Pin Type) Remarks NN is Output Voltage(Ex：33=3.3V) LLLLLL：Date Code NN is Output Voltage(Ex：33=3.3V) LLLLLL：Date Code 2. TO252-3L： Device EC881212A4TR EC881215A4TR EC881218A4TR EC881225A4TR EC881233A4TR EC881212A4GR EC881215A4GR EC881218A4GR EC881225A4GR EC881233A4GR E-CMOS Corp. (www.ecmos.com.tw) Remarks 8812 12TYW 8812 15TYW 8812 TO252-3L 18TYW (T Type) 8812 25TYW 1. Y：Year code(D=2013;E=2014; 8812 F=2015…) 33TYW 2. W：Week Code(The big character of 8812 A~Z is for the week of 1~26, and 12GYW small a~z is for the week of 27~52.) 8812 15GYW 8812 TO252-3L 18GYW (G Type) 8812 25GYW 8812 33GYW Page 5 of 10 5J19N-Rev.F002 EC8812 1.5A Low Dropout Linear Regulator Absolute Maximum Ratings Parameter Symbol Value Units Input Voltage VIN 6 V Output Voltage Range VOUT -0.3 to VIN Power Dissipation PD Output Short Circuit Duration V Internally Limited (3) Infinite Thermal Resistance, Junction-to-Ambient ΘJA 155(SOT-223) °C/W 90(TO-252) Lead Temperature (Soldering, 5 sec.) 260 °C Junction Temperature Range TJ -40 to +150 °C Storage Temperature Range TS -40 to +150 °C Recommended Operating Conditions Parameter Symbol Value Units Supply Input Voltage Range VIN 5 V Junction Temperature Range TJ -40 to +125 °C E-CMOS Corp. (www.ecmos.com.tw) Page 6 of 10 5J19N-Rev.F002 EC8812 1.5A Low Dropout Linear Regulator Electrical Characteristics （VIN = 5V; CIN = 10μF; COUT = 10μF; IOUT = 10mA; TJ = 25°C; unless otherwise noted） Symbol VOUT Parameter Output Voltage Accuracy ΔVOUT/VOUT Line Regulation ΔVOUT/VOUT ΔVOUT/ΔT Load Regulation (5) Temperature Coefficient Dropout Voltage Min Typ Max Vout=1.2V 1.176 1.2 1.224 Vout=1.5V 1.47 1.5 1.53 Vout=1.8V 1.764 1.8 1.836 Vout=2.5V 2.45 2.5 2.55 Vout=3.3V 3.234 3.3 3.366 VIN = (VOUT + 0.7)V to 5.5V -- 0.1 -- %/V -- 2 -- % Note 4 -- 0.1 -- mV/°C IOUT = 150mA -- 40 -- mV IOUT = 500mA -- 150 -- mV IOUT = 1000mA -- 300 -- mV Thermal Protection Temperature -- 150 -- °C Protection Hysterisys -- 30 -- °C IOUT = 0mA -- 150 -- μA -- 2.5 -- A -- 0.55 -- A VIN = (VOUT + 0.7)V IOUT = 10mA to 1500mA Output Voltage VIN – VOUT Test Conditions (6) TPROTECTION Thermal Protection IQ Quiescent Current ILIMIT Current Limit Ishort Short Circuit Current Vin=Vout+1V; Vout< 0.4V Unit V Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The device is not guaranteed to function outside its operating rating. Note 3: The maximum allowable power dissipation at any T A (ambient temperature) is calculated using: PD(MAX) = (TJ(MAX) – TA)/ΘJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. See “Thermal Consideration” section for details Note 4: Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range. Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. are tested for load regulation in the load range from 0.1mA to 1200mA. Parts Changes in output voltage due to heating effects are covered by the thermal regulation specification. Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. E-CMOS Corp. (www.ecmos.com.tw) Page 7 of 10 5J19N-Rev.F002 EC8812 1.5A Low Dropout Linear Regulator Typical Performance Characteristics Output Voltage vs. Load Current 0.84 3.340 0.82 Output Voltage (V) Reference Voltage （ V ） Reference Voltage vs. Temperature 0.8 0.78 0.76 0.74 0.72 0.7 30 40 50 60 70 80 90 3.320 3.300 3.280 3.260 3.240 3.220 3.200 100 110 120 130 140 150 0 0. 0. 0. 0. 0. 0. 0. 0. 0. 1 1. 1. 1. 1. 1. 1. 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 T (℃) Load Current (A) Output Voltage vs. Input Voltage Output Voltage (V) 3.4 3.35 3.3 3.25 3.2 3.15 3.1 3.3 3.8 4.3 4.8 5.3 5.8 6.3 Input Voltage (V) E-CMOS Corp. (www.ecmos.com.tw) Page 8 of 10 5J19N-Rev.F002 EC8812 1.5A Low Dropout Linear Regulator Applications Information Application Hints Thermal Considerations Like any low dropout regulator, EC8812 requires It is important that the thermal limit of the package is external capacitors to ensure stability. not exceeded. The external The EC8812 has built-in thermal capacitors must be carefully selected to ensure protection. When the thermal limit is exceeded, the performance. IC will enter protection, and VOUT will be pulled to Input Capacitor ground. An input capacitor of at least 10μF is required. application can be calculated as following: Ceramic or Tantalum can be used. The power dissipation for a given The value can be increase without upper limit. The power dissipation (PD) is Output Capacitor PD = IOUT * [VIN – VOUT] An output capacitor is required for stability. It must be placed no more than 1 cm away from the VOUT pin, The thermal limit of the package is then limited to and connected directly between VOUT and GND pins. PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction The minimum value is 10μF but may be increase temperature, TA is the ambient temperature, and ΘJA without limit. is around 155°C/W（SOT-223） for EC8812. The EC8812 is designed to enter thermal protection at 170°C. For example, if TA is 25°C then the maximum PD is limited to about 0.94W. In other words, if IOUT(MAX) = 1200mA, then [VIN – VOUT] cannot exceed 780mV. E-CMOS Corp. (www.ecmos.com.tw) Page 9 of 10 5J19N-Rev.F002 1.5A Low Dropout Linear Regulator EC8812 Outline Drawing For SOT-223 Outline Drawing For TO252-3L E-CMOS Corp. (www.ecmos.com.tw) Page 10 of 10 5J19N-Rev.F002