® RT9079 36V, 50μ μA IQ, 200mA Low Dropout Voltage Linear Regulator General Description Features The RT9079 is a low-dropout (LDO) voltage regulators with enable function offering the benefits of high input voltage, low-dropout voltage, low-power consumption, and miniaturized packaging. The features of low quiescent current and almost zero disable current is ideal for powering the battery equipment to a longer service life. The RT9079 is stable with the ceramic output capacitor over its wide input range from 3.5V to 36V and the entire range of output load current (0mA to 200mA). Applications Portable, Battery Powered Equipments Extra Low Voltage Microcontrollers Notebook Computers 50μ μA Ground Current at no Load Maximum Operating Input Voltage 36V ±2% Output Accuracy 200mA Output Current with EN Less than 0.1μ μA Disable Current Dropout Voltage : 0.2V at 10mA Support Fixed Output Voltage 2.5V, 3V, 3.3V, 5V, 6V, 9V, 12V Stable with Ceramic or Tantalum Capacitor Current Limit Protection Over-Temperature Protection RoHS Compliant and Halogen Free Ordering Information RT9079Package Type J5 : TSOT-23-5 Pin Configurations Lead Plating System G : Green (Halogen Free and Pb Free) (TOP VIEW) VOUT EN 5 4 2 Output Voltage 25 : 2.5V 30 : 3V 33 : 3.3V 50 : 5V 3 VCC GND NC 60 : 6V 90: 9V C0: 12V TSOT-23-5 Marking Information Note : For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Richtek products are : RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Simplified Application Circuit RT9079 EN EN VOUT VOUT VCC VCC COUT CIN GND Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS9079-02 February 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9079 Pin Description Pin No. Pin Name Pin Function 1 VCC Supply Voltage Input. 2 GND Ground. 3 NC No Internal Connection. 4 EN Enable Control Input. 5 VOUT Output of the Regulator. Function Block Diagram VOUT VCC Current/Thermal Sense EN Bandgap Reference + - R1 R2 GND Operation Basic Operation Enable The RT9079 is a high input voltage linear regulator designed especially for low external component systems. The input voltage range is from 3.5V to 36V. The RT9079 delivers the output power when it is set to enable state. When it works in disable state, there is no output power and the operation quiescent current is almost zero. The minimum required output capacitance for stable operation is 1μF effective capacitance after consideration of the temperature and voltage coefficient of the capacitor. Output Transistor The RT9079 builds in a P-MOSFET output transistor which provides a low switch-on resistance for low dropout voltage applications. Error Amplifier The Error Amplifier compares the internal reference voltage with the output feedback voltage from the internal divider, and controls the Gate voltage of P-MOSFET to support good line regulation and load regulation at output voltage. Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 Current Limit Protection The RT9079 provides current limit function to prevent the device from damages during over-load or shorted-circuit conditions. This current is detected by an internal sensing transistor. Over-Temperature Protection The over-temperature protection function turns off the PMOSFET when the junction temperature exceeds 150°C (typ.) and the output current exceeds 4mA. Once the junction temperature cools down by approximately 20°C, the regulator automatically resumes operation. is a registered trademark of Richtek Technology Corporation. DS9079-02 February 2016 RT9079 Absolute Maximum Ratings (Note 1) VCC, EN to GND -----------------------------------------------------------------------------------------------------------VOUT to VCC --------------------------------------------------------------------------------------------------------------VOUT to GND RT9079-60, RT9079-90/RT9079-C0 -----------------------------------------------------------------------------------RT9079-25/RT9079-30/RT9079-33/RT9079-50 ---------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C TSOT-23-5 -------------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) TSOT-23-5, θJA -------------------------------------------------------------------------------------------------------------Junction Temperature -----------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------Storage Temperature Range --------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM (Human Body Model) ----------------------------------------------------------------------------------------------- Recommended Operating Conditions −0.3V to 40V −40V to 0.3V −0.3V to 15V −0.3V to 6V 0.43W 230.6°C/W 150°C 260°C −60°C to 150°C 2kV (Note 4) Supply Input Voltage ------------------------------------------------------------------------------------------------------- 3.5V to 36V Junction Temperature Range --------------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range --------------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VCC = 5V, CIN = 1μF, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage VCC 3.5 -- 36 V Output Voltage Range VOUT 2.5 -- 12 V DC Output Accuracy VOUT ILOAD = 10mA 2 -- 2 % Dropout Voltage VDROP ILOAD = 10mA, VCC > 5V -- 0.2 0.36 V VCC Consumption Current IQ ILOAD = 10mA, VCC = 15V -- 50 100 A Shutdown Current VEN = 0V -- 0.1 0.5 A Shutdown Leakage Current VEN = 0V, VOUT = 0V -- 0.1 0.5 A VEN = 36V -- 0.1 -- A -- 0.04 0.5 EN Input Current IEN ILOAD = 1mA, VLINE Line Regulation VOUT +1 < VCC < 36V, VOUT 3.3V ILOAD = 1mA, % VOUT +1 < VCC < 36V, VOUT 3.3V -- 0.04 0.6 Load Regulation VLOAD 0mA < ILOAD < 100mA 1 -- 1 % Output Current Limit ILIM VOUT = 0.5 x VOUT(normal) 200 350 -- mA Enable Input Voltage Logic-High VIH -- -- 2 Logic-Low VIL 0.6 -- -- -- 150 -- °C -- 20 -- °C Thermal Shutdown Temperature TSD Thermal Shutdown Hysteresis TSD ILOAD = 30mA Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS9079-02 February 2016 V is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9079 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 RT9079 EN VCC 3.5V to 36V EN VOUT CIN 1µF VCC Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 VOUT COUT (Effective Capacitance 1µF) GND is a registered trademark of Richtek Technology Corporation. DS9079-02 February 2016 RT9079 Typical Operating Characteristics Output Voltage vs. Temperature Output Voltage vs. Output Current 2.60 2.52 2.58 2.50 Output Voltage (V) Output Voltage (V) 2.56 2.54 2.52 2.50 2.48 VCC VCC VCC VCC 2.46 2.44 = 12V, ILOAD = = 12V, ILOAD = = 36V, ILOAD = = 36V, ILOAD = 0.1mA 20mA 0.1mA 20mA 0 25 VCC = 12V VCC = 24V 2.46 VOUT = 2.5V VOUT = 2.5V 2.40 -25 VCC = 36V 2.44 2.42 -50 2.48 50 75 100 2.42 0 125 25 Temperature (°C) 50 75 100 125 150 Output Current (mA) Output Voltage vs. Supply Voltage Quiescent Current vs. Input Voltage 70 2.60 ILOAD = ILOAD = ILOAD = ILOAD = 2.55 Quiescent Current (μA) Output Voltage (V) 67 0mA 0.1mA 10mA 20mA 2.50 2.45 3 6 9 12 15 18 21 24 27 30 33 61 58 55 52 49 46 43 VCC = 3.5V to 36V, VOUT = 2.5V 2.40 64 VOUT = 2.5V, ILOAD = 10mA 40 3 36 6 9 12 18 21 24 27 30 33 36 Input Voltage (V) Supply Voltage (V) Quiescent Current vs. Temperature SHDN Input Leakage Current vs. VCC 80 60 50 40 30 20 10 VCC = 4V, VOUT = 2.5V, ILOAD = 10mA 0 SHDN Leakage Current (nA)1 100 70 Quiescent Current (μA) 15 80 60 40 20 EN = 0V 0 -50 -25 0 25 50 75 100 Temperature (°C) Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS9079-02 February 2016 125 3 6 9 12 15 18 21 24 27 30 33 36 Supply Voltage (V) is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9079 SHDN Input Leakage Current vs. Temperature EN Voltage vs. Supply Voltage 2.0 1.4 1.2 EN Voltage (V) SHDN Leakage Current (μA)1 1.6 1.0 0.8 0.6 VCC = 36V 0.4 1.5 High Threshold 1.0 Low Threshold 0.5 VCC = 3.5V 0.2 0.0 0.0 -50 -25 0 25 50 75 100 125 3 6 9 12 18 21 24 27 EN Voltage vs. Temperature 33 36 Dropout Voltage vs. Temperature 0.5 1.5 Dropout Voltage (V) 2.0 High Threshold 1.0 Low Threshold 0.5 0.4 0.3 0.2 0.1 VCC = 36V ILOAD = 10mA 0 0.0 -50 -25 0 25 50 75 100 -50 125 -25 0 25 50 75 100 125 Temperature (°C) Temperature (°C) Current Limit vs. Temperature PSRR vs. Frequency 350 0 300 VCC = 12V VOUT = 2.5V, ILOAD = 50mA -20 250 VCC = 36V 200 150 PSRR (dB) Current Limit (mA) 30 Supply Voltage (V) Temperature (°C) EN Voltage (V) 15 VCC = 5V -40 -60 VCC = 12V 100 -80 50 VOUT = 2.5V 0 -50 -25 0 25 50 75 100 Temperature (°C) Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 125 -100 10 100 1000 10000 100000 1000000 Frequency (Hz ) is a registered trademark of Richtek Technology Corporation. DS9079-02 February 2016 RT9079 Load Transient Response Load Transient Response VOUT_ac (50mV/Div) VOUT_ac (50mV/Div) I LOAD (50mA/Div) I LOAD (50mA/Div) VCC = 12V, VOUT = 2.5V, ILOAD = 10mA to 100mA VCC = 24V, VOUT = 2.5V, ILOAD = 10mA to 100mA Time (250μs/Div) Time (250μs/Div) Load Transient Response Load Transient Response VOUT_ac (100mV/Div) VOUT_ac (100mV/Div) I LOAD (100mA/Div) I LOAD (50mA/Div) VCC = 12V, VOUT = 2.5V, ILOAD = 10mA to 200mA VCC = 12V, VOUT = 2.5V, ILOAD = 10mA to 100mA Time (250μs/Div) Time (10μs/Div) Line Transient Response Line Transient Response VOUT_ac (20mV/Div) VOUT_ac (20mV/Div) V CC (5V/Div) V CC (10V/Div) VCC = 4.4V to 15V, VOUT = 2.5V, ILOAD = 100mA Time (100μs/Div) Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS9079-02 February 2016 VCC = 3.5V to 36V, VOUT = 2.5V, ILOAD = 100mA Time (100μs/Div) is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9079 Power On from EN V CC (10V/Div) Power Off from EN EN (2V/Div) V CC (10V/Div) EN (2V/Div) VOUT (1V/Div) VOUT (1V/Div) I LOAD (50mA/Div) VCC = 24V, VOUT = 2.5V, ILOAD = 100mA Time (100μs/Div) Copyright © 2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 I LOAD (50mA/Div) VCC = 24V, VOUT = 2.5V, ILOAD = 100mA Time (25μs/Div) is a registered trademark of Richtek Technology Corporation. DS9079-02 February 2016 RT9079 Applications Information For continuous operation, do not exceed absolute maximum junction temperature. The maximum power dissipation depends on the thermal resistance of the IC package, PCB layout, rate of surrounding airflow, and difference between junction and ambient temperature. The maximum power dissipation can be calculated by the following formula : 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. For recommended operating condition specifications, the maximum junction temperature is 125°C. The junction to ambient thermal resistance, θJA, is layout dependent. For TSOT-23-5 package, the thermal resistance, θJA, is 230.6°C/W on a standard JEDEC 51-7 four-layer thermal test board. The maximum power dissipation at TA = 25°C can be calculated by the following formula : 1.0 Maximum Power Dissipation (W)1 Thermal Considerations 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) = (125°C − 25°C) / (230.6°C/W) = 0.43W for TSOT-23-5 package The maximum power dissipation depends on the operating ambient temperature for fixed T J(MAX) and thermal resistance, θJA. The derating curve in Figure 1 allows the designer to see the effect of rising ambient temperature on the maximum power dissipation. Copyright © 2016 Richtek Technology Corporation. All rights reserved. DS9079-02 February 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9079 Outline Dimension H D L B C b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.700 1.000 0.028 0.039 A1 0.000 0.100 0.000 0.004 B 1.397 1.803 0.055 0.071 b 0.300 0.559 0.012 0.022 C 2.591 3.000 0.102 0.118 D 2.692 3.099 0.106 0.122 e 0.838 1.041 0.033 0.041 H 0.080 0.254 0.003 0.010 L 0.300 0.610 0.012 0.024 TSOT-23-5 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 10 DS9079-02 February 2016