RT9073A-28GQZ

® RT9073A 1μ μA IQ, 250mA Low-Dropout Linear Regulator General Description Features The RT9073A is a low-dropout (LDO) voltage regulators with enable function that operates from 1.2V to 5.5V. It provides up to 250mA of output current and offers lowpower operation in miniaturized packaging.  The features of low quiescent current as low as 1μA and almost zero disable current is ideal for powering the battery equipment to a longer service life. The RT9073A is stable with the ceramic output capacitor over its wide input range from 1.2V to 5.5V and the entire range of output load current (0mA to 250mA).          Ordering Information RT9073APackage Type QZ : ZQFN-4L 1x1 (Z-Type) (ZDFN-4L 1x1) Y : SC-82 Lead Plating System G : Green (Halogen Free and Pb Free) Output Voltage 09 : 0.9V 1K : 1.05V 12 : 1.2V 15 : 1.5V 18 : 1.8V 19 : 1.9V   1μ μA Ground Current at no Load PSRR = 75dB at 1kHz ±2% Output Accuracy 250mA (VIN ≥ 2.3V) Output Current with EN Low (0.1μ μA) Disable Current 1.2V to 5.5V Operating Input Voltage Dropout Voltage : 0.5V at 250mA when VOUT ≥ 3V Support Fixed Output Voltage 0.9V, 1.05V, 1.2V, 1.5V, 1.8V, 1.9V, 2.5V, 2.7V, 2.8V, 2.9V, 3V, 3.3V Stable with Ceramic or Tantalum Capacitor Current Limit Protection Over Temperature Protection ZQFN-4L 1x1 (ZDFN-4L 1x1), SC-82 Packages Available Applications    Portable, Battery Powered Equipment Ultra Low Power Microcontrollers Notebook computers Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. 25 : 2.5V 27 : 2.7V 28 : 2.8V 29 : 2.9V 30 : 3.0V 33 : 3.3V Special Request: Any Voltage Between 0.9V and 3.3V under specific business agreement Note : Richtek products are :  RoHS compliant and compatible with the current require-  Suitable for use in SnPb or Pb-free soldering processes. ments of IPC/JEDEC J-STD-020. Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9073A-00 April 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9073A Pin Configurations (TOP VIEW) VOUT 4 1 VIN SGND GND 2 5 3 VIN VOUT 4 3 2 EN EN ZQFN-4L 1x1 (ZDFN-4L 1x1) GND SC-82 (SSOT-24) Functional Pin Description Pin No. ZQFN-4L 1x1 (ZDFN-4L 1x1) SC-82 (SSOT-24) Pin Name Pin Function 1 3 VOUT Output of the Regulator. 2 2 GND Ground. 3 1 EN Enable Control Input. 4 4 VIN Supply Voltage Input. 5 (Exposed Pad) -- SGND Substrate of Chip. Leave floating or tie to GND. Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9073A-00 April 2015 RT9073A Function Block Diagram VIN VOUT Current/Thermal Sense GND R1 Bandgap Reference + - EN R2 Operation Basic operation Current Limit Protection The RT9073A is a low quiescent current linear regulator designed especially for low external components system. The input voltage range is from 1.2V to 5.5V. The RT9073A provides current limit function to prevent the device from damages during over-load or shorted-circuit condition. This current is detected by an internal sensing transistor. Output Transistor The RT9073A 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. Over Temperature Protection The over temperature protection function will turn off the P-MOSFET when the junction temperature exceeds 150°C (typ.), VIN ≥ 1.5V and the output current exceeds 30mA. Once the junction temperature cools down by approximately 20°C, the regulator will automatically resume operation. Enable The RT9073A 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. Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9073A-00 April 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9073A Absolute Maximum Ratings         (Note 1) VIN, VOUT, EN to GND --------------------------------------------------------------------------------------------------- −0.3V to 6.5V VOUT to VIN ---------------------------------------------------------------------------------------------------------------- −6.5V to 0.3V Power Dissipation, PD @ TA = 25°C ZQFN-4L 1x1 (ZDFN-4L 1x1) -------------------------------------------------------------------------------------------- 1.07W SC-82 ------------------------------------------------------------------------------------------------------------------------ 0.28W Package Thermal Resistance (Note 2) ZQFN-4L 1x1 (ZDFN-4L 1x1), θJA -------------------------------------------------------------------------------------- 92.7°C/W ZQFN-4L 1x1 (ZDFN-4L 1x1), θJC ------------------------------------------------------------------------------------- 62.3°C/W SC-82, θJA ------------------------------------------------------------------------------------------------------------------- 345.6°C/W Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C ESD Susceptibility (Note 3) HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV MM (Machine Model) ------------------------------------------------------------------------------------------------------ 200V Recommended Operating Conditions    (Note 4) Input Voltage, VIN --------------------------------------------------------------------------------------------------------- 1.2V to 5.5V Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VOUT + 1 < VIN < 5.5V, TA = 25°C, unless otherwise specified) Parameter Output Voltage Range Symbol Dropout Voltage (ILOAD = 250mA) (Note 5) VCC Consumption Current VDROP VDROP IQ Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 Min Typ Max Unit 0.9 -- 3.3 V ILOAD = 1mA 2 -- 2 % 0.9V  VOUT  1.2V -- 0.5 0.65 1.2V  VOUT  1.5V -- 0.3 0.4 1.5V  VOUT  1.8V -- 0.2 0.24 1.8V  VOUT  2.5V -- 0.15 0.18 2.5V  VOUT  3V -- 0.1 0.15 3V  VOUT -- 0.08 0.12 0.9V  VOUT  1.2V -- 1.25 1.45 1.2V  VOUT  1.5V -- 1 1.2 1.5V  VOUT  1.8V -- 0.81 0.9 1.8V  VOUT  2.5V -- 0.68 0.8 2.5V  VOUT  3V -- 0.51 0.6 3V  VOUT -- 0.45 0.6 ILOAD = 0mA, VOUT ≦ 5.5V -- 1 3 VOUT DC Output Accuracy Dropout Voltage (ILOAD = 50mA) (Note 5) Test Conditions V V A is a registered trademark of Richtek Technology Corporation. DS9073A-00 April 2015 RT9073A Parameter Symbol Test Conditions Min Typ Max Unit Shutdown GND Current VEN = 0V -- 0.1 0.5 A Shutdown Leakage Current VEN = 0V, VOUT = 0V -- 0.1 0.5 A VEN = 5.5V -- -- 0.1 A 1.2V  VIN  1.5V -- -- 0.6 1.5V  VIN  1.8V -- -- 0.3 1.8V  VIN  2.1V -- -- 0.1 2.1V  VIN  5.5V -- -- 0.15 EN Input Current IEN LINE Line Regulation ILOAD = 10mA % Load Regulation LOAD 1mA < ILOAD < 200mA -- -- 1 % Power Supply Rejection Ratio PSRR VIN = 3V, ILOAD = 50mA, COUT = 1F, VOUT = 2.5V, f = 1kHz -- 75 -- dB VOUT = 0.9V -- 39 -- VOUT = 1.2V -- 46 -- VOUT = 1.8V -- 48 -- VOUT = 3.3V -- 58 -- Peak output current 260 350 500 mA VOUT = 0.5 x VOUT(normal) 190 270 350 mA COUT = 1F, ILOAD = 30mA, BW = 10Hz to 100kHz, VIN = VOUT + 2V Output Voltage Noise Output Current Limit ILIM Fold-Back Current Limit VRMS Logic-High VIH VIN = 5V 1.2 -- -- Logic-Low VIL VIN = 5V -- -- 0.4 Thermal Shutdown Temperature TSD ILOAD = 30mA, VIN  1.5V -- 150 -- C Thermal Shutdown Hysteresis TSD -- 20 -- C Enable Input Voltage V 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. θJC is measured at the exposed pad of the package. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Note 5. The dropout voltage is defined as VIN − VOUT, when VOUT is 98% of the normal value of VOUT. Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9073A-00 April 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9073A Typical Application Circuit RT9073A VIN EN 4 CIN 1µF 3 VIN VOUT 1 COUT 1µF VOUT EN GND 2 Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 is a registered trademark of Richtek Technology Corporation. DS9073A-00 April 2015 RT9073A Typical Operating Characteristics Output Voltage vs. Temperature Output Voltage vs. Temperature 0.91 3.32 0.90 Output Voltage (V) Output Voltage (V) 3.31 3.30 3.29 ILOAD = 1mA ILOAD = 250mA 3.28 3.27 ILOAD = 1mA ILOAD = 250mA 0.89 0.88 0.87 3.26 VIN = 5V, VOUT = 3.3V VIN = 5V, VOUT = 0.9V 0.86 3.25 -50 -25 0 25 50 75 100 -50 125 -25 0 25 50 75 100 125 Temperature (°C) Temperature (°C) Output Voltage vs. Input Voltage Output Voltage vs. Output Current 3.33 0.904 0.902 Output Voltage (V) Outout Voltage (V) 3.32 0.900 0.898 0.896 0.894 3.31 3.3 3.29 0.892 VOUT = 0.9V, ILOAD = 1mA VIN = 5V, VOUT = 3.3V 3.28 0.890 1 1.5 2 2.5 3 3.5 4 4.5 5 0 5.5 30 90 120 150 180 210 240 Ground Current vs. Temperature Ground Current vs. Input Voltage 2.1 1.5 1.8 1.4 Ground Current (μA) Ground Current (μA) 60 Output Current (mA) Input Voltage (V) 1.5 1.2 0.9 0.6 1.3 1.2 1.1 1 0.9 0.3 VIN = 5V, VOUT = 3.3V VOUT = 0.9V 0.8 0 1 1.5 2 2.5 3 3.5 4 4.5 5 Input Voltage (V) Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9073A-00 April 2015 5.5 -50 -25 0 25 50 75 100 125 Temperature (°C) is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9073A Shutdown Current vs. Temperature Shutdown Current vs. Input Voltage 0.50 VOUT = 0.9V, VEN = 0V Shutdown Current (μA)1 0.45 Shutdown Current (μA)1 0.30 0.40 0.35 0.30 0.25 0.20 0.15 0.10 VEN = 0V 0.25 0.20 0.15 0.10 VIN = 5V VIN = 3.5V 0.05 0.05 0.00 0.00 1.2 1.6 2 2.4 2.8 3.2 3.6 4 -50 4.4 4.8 5.2 5.6 -25 0 Input Voltage (V) EN Threshold vs. Input Voltage 0.70 25 50 75 100 125 Temperature (°C) EN Threshold vs. Temperature 1.00 EN_H 0.60 0.80 EN_L EN Threshold (V) EN Threshold (V) 0.65 0.55 0.50 0.45 0.40 EN_H 0.60 EN_L 0.40 0.20 0.35 VIN = 5V 0.00 0.30 1.2 1.6 2 2.4 2.8 3.2 3.6 4 -50 4.4 4.8 5.2 5.6 -25 0 Dropout Voltage vs. Temperature 0.40 50 75 100 125 Dropout Voltage vs. Output Current 1.6 VIN = 3.3V 0.35 VOUT = 0.9V 1.4 0.30 0.25 Dropout Voltage (V) Dropout Voltage (V) 25 Temperature (°C) Input Voltage (V) ILOAD = 100mA 0.20 0.15 ILOAD = 50mA 0.10 ILOAD = 20mA 0.05 1.2 1.0 TA = 125°C TA = 85°C TA = 25°C TA = −40°C 0.8 0.6 0.4 0.2 0.00 0.0 -50 -25 0 25 50 75 100 Temperature (°C) Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 125 0 50 100 150 200 250 Output Current (mA) is a registered trademark of Richtek Technology Corporation. DS9073A-00 April 2015 RT9073A Dropout Voltage vs. Output Current 1.4 Dropout Voltage vs. Output Current 1.2 VOUT = 1.5V 1.0 Dropout Voltage (V) Dropout Voltage (V) 1.2 VOUT = 2.5V 1.0 0.8 0.6 TA = 125°C TA = 85°C TA = 25°C TA = −40°C 0.4 0.2 0.8 TA = 125°C TA = 85°C TA = 25°C TA = −40°C 0.6 0.4 0.2 0.0 0.0 0 50 100 150 200 0 250 50 Output Current (mA) Fold-Back Current Limit (mA) VIN = 5V Current Limit (mA) 480 VOUT = 0.9V 380 VOUT = 3.3V 330 -50 GND Current (μA) 250 VIN = 5V 370 VOUT = 0.9V 320 VOUT = 3.3V 270 220 280 200 200 Fold-Back Current Limit vs. Temperature 420 430 150 Output Current (mA) Current Limit vs. Temperature 530 100 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 Temperature (°C) Temperature (°C) Ground Current vs. Load Current Power On from EN 100 125 VIN = 5V 150 VIN (2V/Div) VEN (2V/Div) VOUT (2V/Div) 100 TA = −40°C TA = 25°C TA = 125°C 50 I LOAD (100mA/Div) 0 0.01 0.1 1 10 100 1000 10000 VIN = 5V Time (50μs/Div) Load Current (mA) Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9073A-00 April 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9073A Power Off from EN Line Transient VIN (2V/Div) VEN (2V/Div) VOUT (2V/Div) VIN (2V/Div) VOUT (5mV/Div) I LOAD (100mA/Div) VIN = 5V VIN = 2.4V to 5.5V, VOUT = 0.9V, ILOAD = 10mA Time (25μs/Div) Time (250μs/Div) Load Transient PSRR vs. Frequency 0 VIN (200mV/Div) VIN = 3.5V, ILOAD = 150mA VIN = 3V, ILOAD = 50mA VIN = 3.5V, ILOAD = 50mA PSRR (dB) -20 -40 -60 -80 I LOAD (100mA/Div) VIN = 5V, VOUT = 3.3V, ILOAD = 10mA to 250mA VOUT = 2.5V, COUT = 2.2μF -100 Time (250μs/Div) 10 100 1000 10000 100000 1000000 Frequency (Hz) Output Noise Output Noise VIN = 2.9V, VOUT = 0.9V, ILOAD = 100mA COUT = 1μF, f = 10Hz to 100kHz Noise(μV) Noise(μV) Output Output Noise Noise 300 270 240 210 180 150 120 90 60 30 0 -30 -60 -90 -120 -150 -180 -210 -240 -270 -300 0 1 2 3 4 5 6 7 8 sec (m) Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 10 9 10 300 270 240 210 180 150 120 90 60 30 0 -30 -60 -90 -120 -150 -180 -210 -240 -270 -300 VIN = 5.3V, VOUT = 3.3V, ILOAD = 100mA COUT = 1μF, f = 10Hz to 100kHz 0 1 2 3 4 5 6 7 8 9 10 sec (m) is a registered trademark of Richtek Technology Corporation. DS9073A-00 April 2015 RT9073A Application Information Like any low dropout linear regulator, the RT9073A’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 VIN and GND pins. 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. Enable The RT9073A has an EN pin to turn on or turn off the regulator, When the EN pin is in logic high, the regulator will be turned on. The shutdown current is almost 0μA typical. The EN pin may be directly tied to VIN to keep the part on. The Enable input is CMOS logic and cannot be left floating. resistance, θJA, is layout dependent. For ZQFN-4L 1x1 (ZDFN-4L 1x1) package, the thermal resistance, θJA, is 92.7°C/W on a standard JEDEC 51-7 four-layer thermal test board. For SC-82 (SSOT-24) package, the thermal resistance, θJA, is 345.6°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 : PD(MAX) = (125°C − 25°C) / (92.7°C/W) = 1.07W for ZQFN-4L 1x1 (ZDFN-4L 1x1) package PD(MAX) = (125°C − 25°C) / (345.6°C/W) = 0.28W for SC-82 (SSOT-24) 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. Current Limit Thermal Considerations 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 : 1.6 Maximum Power Dissipation (W)1 The RT9073A contains an independent current limiter, which monitors and controls the pass transistor's gate voltage, limiting the output current to 0.35A (typ.). The current limiting level is reduced to around 250mA named fold-back current limit when the output voltage is further decreased. The output can be shorted to ground indefinitely without damaging the part. Four-Layer PCB 1.2 ZQFN-4L 1x1 (ZDFN-4L 1x1) 0.8 0.4 SC-82 (SSOT-24) 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. For recommended operating condition specifications the maximum junction temperature is 125°C and TA is the ambient temperature. The junction to ambient thermal Copyright © 2015 Richtek Technology Corporation. All rights reserved. DS9073A-00 April 2015 is a registered trademark of Richtek Technology Corporation. www.richtek.com 11 RT9073A Outline Dimension 1 1 2 2 DETAIL A Pin #1 ID and Tie Bar Mark Options Note : The configuration of the Pin #1 identifier is optional, but must be located within the zone indicated. Symbol Dimensions In Millimeters Dimensions In Inches Min. Max. Min. Max. A 0.300 0.400 0.012 0.016 A1 0.000 0.050 0.000 0.002 A3 0.117 0.162 0.005 0.006 b 0.175 0.275 0.007 0.011 D 0.900 1.100 0.035 0.043 D2 0.450 0.550 0.018 0.022 E 0.900 1.100 0.035 0.043 E2 0.450 0.550 0.018 0.022 e L 0.625 0.200 0.025 0.300 0.008 0.012 H 0.039 0.002 H1 0.064 0.003 Z-Type 4L QFN 1x1 Package Copyright © 2015 Richtek Technology Corporation. All rights reserved. www.richtek.com 12 is a registered trademark of Richtek Technology Corporation. DS9073A-00 April 2015 RT9073A D e H L B C b1 b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.800 1.100 0.031 0.043 A1 0.000 0.100 0.000 0.004 B 1.150 1.350 0.045 0.053 b 0.150 0.400 0.006 0.016 b1 0.350 0.500 0.014 0.020 C 1.800 2.450 0.071 0.096 D 1.800 2.200 0.071 0.087 e 1.300 0.051 H 0.080 0.260 0.003 0.010 L 0.200 0.460 0.008 0.018 SC-82 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. DS9073A-00 April 2015 www.richtek.com 13