Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 General Description The EC8806 is a 300mA, low dropout and low noise Features linear regulator with high ripple rejection ratio and fast Ultra-Low-Noise Application turn-on time. It has fixed and adjustable versions with Wide 2.5V to 7V Operating Range output voltage ranging from 1.5V to 5V. Quick Start-up The EC8806 includes a reference voltage source, an Current Limiting Protection error amplifier, driver transistors and an internal Thermal Shutdown Protection current limiter. The current limiter’s holdback circuit Low Dropout : 200mV @ 300mA operates as a short protection. High Ripple Rejection 70dB@1kHz The EC8806 works well with low ESR ceramic Standby Current Less Than 0.1μA capacitors, suitable for portable RF and wireless Seven Fixed Voltage Options Available battery-powered applications with stringent space requirements and demanding performance. It also Applications offers ultra low noise output and has low quiescent Battery-Powered Equipment current. Portable Instruments Digital Camera WLAN Communication Hand-Held Instruments Ordering Information E-CMOS Corp. (www.ecmos.com.tw) Page 1 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 Marking Information Device Marking Information EC8806VVB2R 8806 VVYW EC8806VVC5R Package Type SOT23-5 6VVf Remarks 1. 2. 3. VV：Output Voltage(Ex：15：1.5V;33：3.3V) Y：Year code(D=2013;E=2014;F=2015…) W ：Week Code(The big character of A~Z is for the week of 1~26, and small a~z is for the week of 27~52.) 1. 2. VV：Output Voltage(Ex：15：1.5V;33：3.3V) Starting with underlined first-V, a bar is for production year 2012. The next bar is mark on top of second-V is for year 2013. The next bar is mark on bottom of second-V is for year 2014.The next bar is mark on top of f is year for 2015. The naming pattern continues with consecutive characters for later years. f is the week of production. The big character of A~Z is for the week of 1~26, and small a~z is for the week of 27~52. SC70-5 3. Typical Application Circuit VIN CIN=1µF Enable VIN VOUT EN BP 100K COUT=1µF VOUT 10nF(Optional) Figure 1. Fixed Voltage BP Version VIN CIN=1µF VIN Enable EN VOUT R1 VOUT COUT=1µF ADJ R2 100K R1 VOUT 1.2 1 Volts R2 Figure 2. Adjustable Voltage Version E-CMOS Corp. (www.ecmos.com.tw) Page 2 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 Absolute Maximum Ratings (Note1) Recommended Operating Conditions Supply Voltage VIN Input Voltage VIN 2.5V to 7V EN Input Voltage 0V to 6V 7V Power Dissipation, PD @ TA=25°C SC70-5 300mW SOT23-5 Junction Temperature 400mW -40°C to 125°C Ambient Operating Temperature -40°C to 85°C Thermal Resistance, ja SC70-5 333°C/W SOT23-5 250°C/W 260 °C Lead Temperature Storage Temperature -65°C to 150°C Electrical Characteristics (Unless otherwise specified VIN=5V, TA=25°C) Parameters Operating Voltage Range (Note 2) Standby Current Supply Current Limit Dropout Voltage (Note 3) EN input Bias Current Symbol ISBY ILIMIT VDROP IIBSD ΔVLINE Load Regulation ΔVLOAD Thermal Shutdown Temperature Thermal Shutdown Temperature Hysteresis Output Voltage Accuracy Logic-Low V EN Threshold Logic-High V f = 100Hz Power Supply Rejection Rate f = 10KHz Min Typ VIN Line Regulation Output Noise Voltage Condition VEN = GND,Shutdown RLOAD = 1Ω VOUT = 1.2V VOUT = 1.8V VOUT = 2.5V IOUT = 300mA VOUT = 2.8V VOUT = 3.0V VOUT = 3.1V VOUT = 3.3V VEN = GND or VIN VIN = (VOUT +1V) to 5.5V IOUT = 1mA 1mA < IOUT < 300mA 10Hz to 100kHz IOUT = 200mA COUT = 1μF 360 0.01 450 1300 1100 580 410 300 260 200 0 15 Max Units 7 V 1 2100 1500 800 500 400 370 300 100 μA mA mV mV mV mV mV mV mV nA 10 mV/V 25 mV 100 μVRMS TSD 165 °C ΔTSD 30 °C eNO ΔVOUT VIL VIH IOUT =1mA VIN = 3V to 5.5V,Shutdown VIN = 3V to 5.5V,Start-up PSRR COUT = 1μF, IOUT = 10mA -2 +2 0.4 1.2 -70 -65 % V V dB Note 1: Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. Note 2: VIN (MIN) = VOUT+VDROPOUT Note 3: The dropout voltage is defined as (VIN-VOUT) when VOUT is 100mV below the target value of VOUT. E-CMOS Corp. (www.ecmos.com.tw) Page 3 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 Pin Configurations (Top View) Pin Description Pin Name Pin Function EN Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100kΩ resistor connected to GND when the control signal is floating. GND Ground VOUT Output Voltage VIN Input Voltage BP Bypass Pin ADJ Feedback Input, this pin could not be floating. E-CMOS Corp. (www.ecmos.com.tw) Page 4 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 Function Block Diagram Shutdown and Logic Control EN BP VIN VREF - MOS Driver + Error Amplifier Current-Limit and Thermal Protection VOUT GND Figure3. BP Version Shutdown and Logic Control EN VIN VREF - MOS Driver + Error Amplifier Current-Limit and Thermal Protection VOUT ADJ GND Figure4. ADJ Version E-CMOS Corp. (www.ecmos.com.tw) Page 5 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 Typical Operating Characteristics Current Limit vs. Input Voltage 95 800 90 700 Current Limit (mA) Quiescent Current (μA) Quiescent Current vs. Input Voltage 85 80 VOUT = 2.8V VIN = EN 600 500 VOUT = 2.8V VOUT Connect 1Ω to GND 400 75 3 3.5 4 4.5 5 5.5 3 6 Input Voltage (V) 4.5 5 250 0.05 Shutdown Current (μA) 0.06 200 150 100 50 0.03 0.02 0.01 VOUT = 2.8V EN = 0V 0 100 150 6 0.04 VOUT = 2.8V 50 5.5 Shutdown Current vs. Input Voltage 300 0 200 250 300 3 3.5 4 4.5 5 Load Current (mA) Input Voltage (V) Load Regulation Line Regulation 2.825 5.5 6 2.85 VIN = 5V ILOAD= 1mA 2.83 Output Voltage (V) 2.815 Output Voltage (V) 4 Input Voltage (V) Dropout Voltage vs. Load Current Dropout Voltage (mV) 3.5 2.805 VIN = 3.3V 2.795 2.785 2.81 2.79 ILOAD= 300mA 2.77 VOUT = 2.8V VOUT = 2.8V 2.75 2.775 0 50 100 150 200 250 3 300 Load Current (mA) E-CMOS Corp. (www.ecmos.com.tw) 3.5 4 4.5 5 5.5 6 Input Voltage (V) Page 6 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 PSRR 80 PSRR (-dB) 70 60 VOUT 2.8V, ILOAD=10mA VOUT 2.8V, ILOAD=50mA 50 VIN =Vout+1V =EN CIN=COUT=1F CBP=10nF 40 100 100 1K 1000 10K 10000 100K 100000 Frequency (Hz) Start-up from EN Start-up from EN EN-DC (1V/Div) EN-DC (1V/Div) VOUT -DC (2V/Div) VOUT -DC (1V/Div) VIN = 3.8V VOUT = 2.8V ILOAD = 0mA VIN = 3.8V VOUT = 2.8V ILOAD = 300mA Time (200μs/Div) Time (20μs/Div) Shutdown from EN Shutdown from EN EN -DC (1V/Div) EN -DC (1V/Div) VOUT -DC (2V/Div) VOUT -DC (2/Div) VIN = 3.8V VOUT = 2.8V ILOAD = 0mA VIN = 3.8V VOUT = 2.8V ILOAD = 300mA Time (100μs/Div) E-CMOS Corp. (www.ecmos.com.tw) Time (10μs/Div) Page 7 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator Load Transient Response VOUT -AC (20mV/Div) Load Transient Response VOUT -AC (20mV/Div) 9mV ILOAD -DC (100mA/Div) EC8806 12.2mV VIN = EN = 3.8V ILOAD = 1mA to 150mA ILOAD -DC (200mA/Div) VIN = EN = 3.8V ILOAD =1mA to 300mA Time (200μs/Div) Time (200μs/Div) Line Transient Response Line Transient Response VIN (1V/Div) VIN (1V/Div) 7.6 mV 7.8 mV VOUT (20mV/Div) VOUT (20mV/Div) VIN = 4.0V to 5.0V, ILOAD = 1mA VIN = 4.0V to 5.0V, ILOAD = 300mA Time (1ms/Div) E-CMOS Corp. (www.ecmos.com.tw) Time (1ms/Div) Page 8 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 Application Information Capacitor Selection and Regulator Stability Input Capacitor An input capacitance of 1μF is required between the device input pin and ground directly (the amount of the capacitance may be increased without limit). The input capacitor MUST be located less than 1 cm from the device to assure input stability (see PCB Layout Section). A lower ESR capacitor allows the use of less capacitance, while higher ESR type (like aluminum electrolytic) requires more capacitance. Capacitor types (aluminum, ceramic and tantalum) can be mixed in parallel, but the total equivalent input capacitance/ESR must be defined as above for stable operation. There are no requirements for the ESR on the input capacitor, but tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the capacitance is 1μF over the entire operating range. Output Capacitor The EC8806 is designed specifically to work with very small ceramic output capacitors. The minimum capacitance recommended (temperature characteristics of X7R, X5R, Z5U or Y5V) is within the 1μF to 10μF range with 5mΩ to 50mΩ ESR range ceramic capacitor between LDO output and GND for transient stability, but it may be increased without limit. Higher capacitance values help to improve transient response. The output capacitor's ESR is critical because it forms a zero to provide phase lead which is required for loop stability. Enable Function The EC8806 is shut down by pulling the EN pin low, and turned on by driving the input high. If the shutdown feature is not required, the EN pin should be tied to VIN to keep the regulator on at all times (the EN pin MUST NOT be left floating). To assure proper operation, the signal source used to drive the EN pin must be able to swing above and below the specified turn-on/off voltage thresholds listed in the “Electrical Characteristics” under V IH and VIL. The ON/OFF signal may come from either CMOS output, or an open-collector output with pull-up resistor to the device input voltage or another logic supply. The high-level voltage may exceed the device input voltage, but must remain within the absolute maximum ratings for the EN pin. Adjustable Operation The adjustable version of the EC8806 has an output voltage ranging from 1.2V to 4.75V. The output voltage of the EC8806 adjustable regulator is programmed using an external resistor divider as shown in Figure 5. The output voltage can be calculated using: R1 VOUT 1.21 R2 Fig. 5 E-CMOS Corp. (www.ecmos.com.tw) Page 9 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 Where: VREF= 1.2V TYP. (the internal reference voltage) To enable default output voltage (pre-set), connect ADJ pin to ground. There is no external component needed to decide voltage. Operating Region and Power Dissipation Since the EC8806 is a linear regulator, its power dissipation is always given by P = I OUT (VIN – VOUT). The maximum power dissipation is given by: PD(MAX) = (TJ–TA) /θJA =(125°C -25°C)/250°C /W = 500mW Where (TJ–TA) is the temperature difference the EC8806 die and the ambient air, θJA is the thermal resistance of the chosen package to the ambient air. For surface mount device, heat sinking is accomplished by using the heat spreading capabilities of the PC board and its copper traces. In the case of a SOT23-5 package, the thermal resistance is typically 240°C /Watt. Refer to Figure 6 & 7 for the EC8806 valid operating region (Safe Operating Area) and refer to Figure 8 for maximum power dissipation information of SOT23-5. The die attachment area of the EC8806 lead frame is connected to pin 2, which is the GND pin. Therefore, the GND pin of EC8806 can dissipate the heat from the die very effectively. To improve the maximum power providing capability, connect the GND pin to ground using a large ground plane near the GND pin. E-CMOS Corp. (www.ecmos.com.tw) Page 10 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator E-CMOS Corp. (www.ecmos.com.tw) Page 11 of 13 EC8806 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 OUTLINE DRAWING SC70-5 E-CMOS Corp. (www.ecmos.com.tw) Page 12 of 13 4L03N-Rev.F001 Ultra-Low Noise Ultra-Fast 300mA LDO Regulator EC8806 OUTLINE DRAWING SOT23-5 E-CMOS Corp. (www.ecmos.com.tw) Page 13 of 13 4L03N-Rev.F001