® RT9076 25μ μA IQ, 250mA Low-Dropout Linear Regulator General Description Features The RT9076 is a low-dropout (LDO) linear regulator that features high input voltage, low dropout voltage, ultra-low operating current, and miniaturized packaging. With quiescent current as low as 25μA, the RT9076 is ideal for battery-powered equipment. The RT9076's stability requirements are easily met with all types of output capacitors, including tiny ceramic capacitors, over its wide input range and its load current range (0mA to 250mA). The RT9076 offers standard output voltages of 1.2V, 1.5V, 1.8V, 2.5V and 3.3V. 25μ μA Quiescent Current ±2% Output Accuracy 250mA Output Current Dropout Voltage : 0.4V at 200mA Fixed Output Voltage 1.2V/1.5V/1.8V/2.5V/3.3V Stable with Ceramic or Tantalum Capacitor Current Limit Protection Over-Temperature Protection SOT-23-3 Packages RoHS Compliant and Halogen Free Applications Ordering Information RT9076- Package Type V : SOT-23-3 VN : SOT-23-3 (N-Type) Portable, Battery Powered Equipment Ultra Low Power Microcontrollers Pin Configurations (TOP VIEW) Lead Plating System G : Green (Halogen Free and Pb Free) GND Output Voltage 12 : 1.2V : 33 : 3.3V 3 2 VCC Special request: Any output voltage between 1.2V and 3.3V under specific business agreement VOUT SOT-23-3 VCC Note : 3 Richtek products are : 2 RoHS compliant and compatible with the current requireGND ments of IPC/JEDEC J-STD-020. VOUT SOT-23-3 (N-Type) Suitable for use in SnPb or Pb-free soldering processes. Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Simplified Application Circuit RT9076 VCC VOUT VCC CIN Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9076-00 August 2015 GND VOUT COUT is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9076 Functional Pin Description Pin No. Pin Name Pin Function SOT-23-3 SOT-23-3 (N-Type) 1 3 VCC Supply Voltage Input. 2 2 VOUT Output of the Regulator. 3 1 GND Ground. Function Block Diagram VOUT VCC OCP GND Bandgap Reference R1 - + OTP R2 Operation The RT9076 is a high input voltage linear regulator specifically designed to minimize external components. Output Transistor The RT9076 includes a built-in low on-resistance P-MOSFET output transistor for low dropout voltage applications. Error Amplifier The Error Amplifier compares the output feedback voltage from an internal feedback voltage divider to an internal reference voltage and controls the P-MOSFET's gate voltage to maintain output voltage regulation. Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 Current Limit The RT9076 provides a current limit function to prevent damage during output over-load or shorted-circuit conditions. The output current is detected by an internal sensing transistor. Over-Temperature Protection The over-temperature protection function will turn off the P-MOSFET when the internal junction temperature exceeds 150°C (typ.) and the output current exceeds 30mA. Once the junction temperature cools down by approximately 20°C, the regulator will automatically resume operation. is a registered trademark of Richtek Technology Corporation. DS9076-00 August 2015 RT9076 Absolute Maximum Ratings (Note 1) VCC to GND ----------------------------------------------------------------------------------------------------------------VOUT to VCC --------------------------------------------------------------------------------------------------------------VOUT to GND --------------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C SOT-23-3 --------------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) SOT-23-3, θJA ---------------------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------Junction Temperature -----------------------------------------------------------------------------------------------------Storage Temperature Range --------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM (Human Body Model) ----------------------------------------------------------------------------------------------MM (Machine Model) ------------------------------------------------------------------------------------------------------ Recommended Operating Conditions −0.3V to 7V −7V to 0.3V −0.3V to 7V 0.41W 243.3°C/W 260°C 150°C −65°C to 150°C 2kV 200V (Note 4) Supply Input Voltage, VCC ----------------------------------------------------------------------------------------------- 2.5V to 6V Junction Temperature Range --------------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range --------------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics ((VOUT + 1) < VCC < 6V, TA = 25°C, unless otherwise specified.) Parameter Output Voltage Range Symbol Min Typ Max Unit 1.2 -- 3.3 V ILOAD = 1mA 2 -- 2 % ILOAD = 0.2A, VOUT 3V -- 0.4 1.2 ILOAD = 0.1A, VOUT < 3V -- 0.3 1 ILOAD = 20mA -- 25 50 ILOAD = 1mA, VOUT > 1.8V -- 0.6 1 ILOAD = 1mA, VOUT 1.8V -- 0.6 1.3 10mA < ILOAD < 200mA, VOUT < 1.5V -- 1 1.4 10mA < ILOAD < 200mA, 1.5V VOUT < 2.5V -- 0.7 1.2 10mA < ILOAD < 250mA, VOUT 2.5V -- 0.6 1 f = 100Hz, IOUT = 50mA -- 70 -- f = 10kHz, IOUT = 50mA -- 40 -- 300 400 500 mA VOUT DC Output Accuracy Dropout Voltage VDrop Quiescent Current IQ Line Regulation Load Regulation Power Supply Rejection Ratio Test Conditions PSRR V A % % dB Output Current Limit VOUT = 0.5 x VOUT(Normal) OTP Threshold ILOAD = 30mA -- 150 -- C OTP Hysteresis ILOAD = 30mA -- 20 -- C Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9076-00 August 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9076 Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and 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 may affect device reliability. Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Typical Application Circuit VCC CIN 1µF RT9076 VCC VOUT Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 GND COUT 1µF VOUT is a registered trademark of Richtek Technology Corporation. DS9076-00 August 2015 RT9076 Typical Operating Characteristics Output Voltage vs. Output Current 3.32 3.31 3.31 3.30 Output Voltage (V) Output Voltage (V) Output Voltage vs. Temperature 3.32 ILOAD = 0mA ILOAD = 10mA ILOAD = 20mA 3.29 3.28 3.27 3.26 3.30 3.29 3.28 3.27 3.26 VCC = 5V, VOUT = 3.3V VCC = 5V, VOUT = 3.3V 3.25 3.25 -50 -25 0 25 50 75 100 125 0 30 Temperature (°C) 60 90 120 150 180 210 240 270 Output Current (mA) Quiescent Current vs. Temperature Output Voltage vs. Input Voltage 3.32 35 Ground Current (μA) Output Voltage (V) 3.31 3.30 3.29 ILOAD = 0mA ILOAD = 10mA ILOAD = 20mA 3.28 3.27 3.26 30 25 20 15 VCC = 3.5V to 6V, VOUT = 3.3V 3.25 VOUT = 3.3V, ILOAD = 20mA 10 3.5 4 4.5 5 5.5 6 -50 -25 0 Input Voltage (V) 50 75 100 125 Dropout Voltage vs. Temperature Quiescent Current vs. Input Voltage 200 Dropout Voltage (mV) 30 Ground Current (μA) 25 Temperature (°C) 25 20 15 150 ILOAD = 50mA ILOAD = 20mA ILOAD = 10mA 100 50 VCC = 5V, VOUT = 3.3V VCC = 3.5V to 6V, VOUT = 3.3V, ILOAD = 20mA 0 10 3.5 4 4.5 5 5.5 Input Voltage (V) Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9076-00 August 2015 6 -50 -25 0 25 50 75 100 125 Temperature (°C) is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9076 Power Supply Rejection Ratio Output Current Limit vs. Temperature -30 400 -35 380 370 PSRR (dB) Output Current Limit (mA) 390 360 350 VCC = 6V VCC = 5V VCC = 4V 340 330 320 310 -40 -45 -50 -55 VOUT = 3.3V -60 300 -50 -25 0 25 50 75 100 VCC = 3.5V, VOUT = 1.5V, ILOAD = 50mA, Capacitance = 10μF 10 125 100 1000 10000 Temperature (°C) Frequency (Hz) Load Transient Response Line Transient Response 100000 VOUT (20mV/Div) VIN (2V/Div) IOUT (100mV/Div) VOUT (50mV/Div) VCC = 6V, VOUT = 3.3V, ILOAD = 10mA to 250mA Time (250μs/Div) VCC = 3.8V to 6V, VOUT = 3.3V, ILOAD = 10mA Time (1ms/Div) Power Up Response VIN (5V/Div) VOUT (1V/Div) IOUT (100mA/Div) VCC = 5V, VOUT = 3.3V, ILOAD = 250mA Time (100μs/Div) Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 is a registered trademark of Richtek Technology Corporation. DS9076-00 August 2015 RT9076 Applications Information Any output capacitor meeting the minimum 1mΩ ESR (Equivalent Series Resistance) requirement may be used. Place the output capacitor close to the IC's VOUT and GND pins. Increasing capacitance and decreasing ESR can improve the circuit's PSRR and line transient response. Thermal Considerations For continuous operation, do not exceed absolute the maximum junction temperature. The maximum power dissipation depends on the thermal resistance of the IC package, PCB layout, rate of surrounding airflow, and the allowed difference between the junction and ambient temperatures. The maximum power dissipation can be calculated by the following formula : 1.0 Maximum Power Dissipation (W)1 Like any low dropout linear regulator, the RT9076's external input and output capacitors must be properly selected for stability and performance. Use a 1μF or larger input capacitor and place it close to the IC's VCC and GND pins. Four-Layer PCB 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 25 50 75 100 125 Ambient Temperature (°C) Figure 1. Derating Curve of Maximum Power Dissipation PD(MAX) = (TJ(MAX) − TA) / θJA where TJ(MAX) is the maximum junction temperature, TA is the ambient temperature, and θJA is the junction to ambient thermal resistance. The recommended operating conditions specify a maximum junction temperature is 125°C. The junction to ambient thermal resistance, θJA, is layout dependent. On a standard JEDEC 51-7 four-layer thermal test board, the thermal resistance, θJA, of the SOT-23-3 package is 243.3C/W. The maximum power dissipation at TA = 25°C can be calculated by the following formula : PD(MAX) = (125°C − 25°C) / (243.3°C/W) = 0.41W for SOT-23-3 package For a fixed T J(MAX) of 125°C, the maximum power dissipation depends on the operating ambient temperature and the package's thermal resistance, θJA. The derating curve in Figure 1 shows the effect of rising ambient temperature on the maximum recommended power dissipation. Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9076-00 August 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9076 Outline Dimension H D L C B e A A1 b Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.889 1.295 0.035 0.051 A1 0.000 0.152 0.000 0.006 B 1.397 1.803 0.055 0.071 b 0.356 0.508 0.014 0.020 C 2.591 2.997 0.102 0.118 D 2.692 3.099 0.106 0.122 e 1.803 2.007 0.071 0.079 H 0.080 0.254 0.003 0.010 L 0.300 0.610 0.012 0.024 SOT-23-3 Surface Mount Package Richtek Technology Corporation 14F, No. 8, Tai Yuen 1st Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries. www.richtek.com 8 DS9076-00 August 2015