® RT9030 150mA, Low Input Voltage, Low Dropout, Low Noise UltraFast Without Bypass Capacitor CMOS LDO Regulator General Description Features The RT9030 is a high-performance, 150mA LDO regulator, offering extremely high PSRR and ultra-low dropout. Ideal for portable RF and wireless applications with demanding performance and space requirements. The RT9030 quiescent current as low as 25μA, further prolonging the battery life. The RT9030 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in handheld wireless devices. The RT9030 consumes typical 0.7μA in shutdown mode and has fast turn-on time less than 40μs. The other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the SC-70-5 and WDFN-6L 1.6x1.6 package. Ordering Information RT9030 - Package Type U5 : SC-70-5 QW : WDFN-6L 1.6x1.6 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Richtek products are : CDMA/GSM Cellular Handsets Portable Information Appliances Laptop, Palmtops, Notebook Computers Hand-Held Instruments Mini PCI & PCI-Express Cards PCMCIA & New Cards Pin Configurations (TOP VIEW) VOUT NC 5 4 2 3 VIN GND EN SC-70-5 EN NC VIN 1 2 3 7 6 5 4 GND NC VOUT WDFN-6L 1.6x1.6 RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. Applications GND Note : Fixed Output Voltage 10 : 1.0V 11 : 1.1V : 32 : 3.2V 33 : 3.3V 1B : 1.25V 1H : 1.85V 2H : 2.85V 1K : 1.05V Wide Operating Voltage Ranges : 1.65V to 5.5V Output Voltage Ranges : 1V to 3.3V Low Dropout : 100mV at 150mA Ultra-Low-Noise for RF Application Ultra-Fast Response in Line/Load Transient Current Limiting Protection Thermal Shutdown Protection High Power Supply Rejection Ratio Only 1μ μF Output Capacitor Required for Stability TTL-Logic-Controlled Shutdown Input RoHS Compliant and Halogen Free Suitable for use in SnPb or Pb-free soldering processes. Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9030-04 December 2013 Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9030 Typical Application Circuit VIN VIN CIN 1µF/X7R Chip Enable VOUT VOUT COUT 1µF/X7R RT9030 NC EN GND Functional Pin Description Pin Number SC-70-5 WDFN-6L 1.6x1.6 5 4 4 2, 5 2 6, 7 (Exposed Pad) Pin Name Pin Function VOUT Regulator Output. NC No Internal Connection. GND 3 1 EN 1 3 VIN Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. Enable Input Logic, Active High. When the EN pin is open it will be pulled to low internally. Supply Input. Function Block Diagram EN POR OTP 1µA Current Limit VREF + VIN MOS Driver VOUT GND Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9030-04 December 2013 RT9030 Absolute Maximum Ratings (Note 1) Supply Input Voltage -----------------------------------------------------------------------------------------------------EN Input Voltage ----------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C SC-70-5 ---------------------------------------------------------------------------------------------------------------------WDFN-6L 1.6x1.6 --------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) SC-70-5, θJA ---------------------------------------------------------------------------------------------------------------WDFN-6L 1.6x1.6, 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 6V 6V 0.3W 0.571W 333°C/W 175°C/W 260°C 150°C −65°C to 150°C 2kV 200V (Note 4) Input Voltage Range ------------------------------------------------------------------------------------------------------ 1.65V to 5.5V Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VIN = VOUT + 0.5V, VEN = VIN, CIN = COUT = 1μF/X5R (Ceramic), TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Output Noise Voltage VON IOUT = 0mA -- 30 -- μVRMS Output Voltage Accuracy (Fixed Output Voltage) VOUT IOUT = 150mA 2 0 2 % Quiescent Current IQ IOUT = 0mA -- 25 50 μA Shutdown Current ISHDN VEN = 0V -- 0.7 1.5 μA Current Limit ILIM RLOAD = 0, 1.65V VIN < 5.5V 170 285 400 mA 50 -- 200 VDROP VOUT = 1.7V to 2.4V, IOUT = 150mA, 1.65V VIN 5.5V VOUT = 2.5V to 3.3V, IOUT = 150mA, 1.65V VIN 5.5V 20 -- 150 -- -- 1 Logic-Low Voltage VIL 0 -- 0.3 Logic-High Voltage VIH 1.6 -- 5.5 -- 1 3 -- 67 -- -- 55 -- -- 40 -- Dropout Voltage (Note 5) (Note 6) Load Regulation (Note 7) (Fixed Output Voltage) EN Threshold Enable Pin Current f = 1kHz Power Supply f = 10kHz Rejection Rate f = 100kHz VLOAD 1mA < IOUT < 150mA 1.65V VIN 5.5V IEN PSRR Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9030-04 December 2013 mV % V μA dB is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9030 Parameter Symbol Test Conditions VIN = (VOUT + 0.5) to 5.5V, IOUT = 1mA to 150mA Min Typ Max Unit -- 0.01 0.2 %/V Line Regulation VLINE Thermal Shutdown Temperature TSD -- 150 -- Thermal Shutdown Hysteresis T SD -- 20 -- C 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 low effective thermal conductivity single-layer test board per JEDEC 51-3. 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. Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN - IOUT under no load condition (IOUT = 0mA). The total current drawn from the supply is the sum of the load current plus the ground pin current. Note 6. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) - 100mV. Note 7. Regulation is measured at constant junction temperature by using a 2ms current pulse. Devices are tested for load regulation in the load range from 10mA to 120mA. Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 is a registered trademark of Richtek Technology Corporation. DS9030-04 December 2013 RT9030 Typical Operating Characteristics Output Voltage vs. Temperature Quiescent Current vs. Temperature 1.80 31 Quiescent Current (µA) Output Voltage (V) RT9030-33GU5, VIN = 4.2V 29 1.75 1.70 1.65 1.60 1.55 27 25 RT9030-17GU5, VIN = 3.3V 23 21 RT9030-10GU5, VIN = 1.65V 19 17 RT9030-17GU5, VIN = 3.3V, VOUT = 1.7V 1.50 -40 -25 -10 5 20 35 50 65 80 15 95 110 125 -40 -25 -10 Temperature (°C) Dropout Voltage vs. Load Current 35 50 65 80 95 110 125 Dropout Voltage vs. Load Current 0.18 0.16 0.10 125°C 25°C 0.08 0.06 -40°C 0.04 0.02 RT9030-33GU5 0.00 0 25 50 75 100 125 Dropout Voltage (V) Dropout Voltage (V) 20 Temperature (°C) 0.12 125°C 0.14 25°C 0.12 0.10 -40°C 0.08 0.06 0.04 0.02 RT9030-17GU5 0.00 0 150 25 50 75 100 Load Current (mA) Load Current (mA) Power On from EN Power Off from EN VEN (5V/Div) VEN (5V/Div) VOUT (500mV/Div) VOUT (500mV/Div) Time (10μs/Div) Copyright © 2013 Richtek Technology Corporation. All rights reserved. December 2013 125 150 RT9030-17GU5, VIN = 3.3V, ILOAD = 50mA RT9030-17GU5, VIN = 3.3V, ILOAD = 50mA DS9030-04 5 Time (50μs/Div) is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9030 Line Transient Response VIN 4.5 (V) Line Transient Response VIN 4.5 (V) 3.5 3.5 VOUT (10mV/Div) VOUT (10mV/Div) RT9030-17GU5, VIN = 3.5V to 4.5V, ILOAD = 10mA RT9030-17GU5, VIN = 3.5V to 4.5V, ILOAD = 100mA Time (100μs/Div) Time (100μs/Div) Load Transient Response Load Transient Response IOUT (50mA/Div) IOUT (50mA/Div) VOUT (50mV/Div) VOUT (50mV/Div) RT9030-17GU5, VIN = 3V, ILOAD = 1mA to 50mA RT9030-17GU5, VIN = 3V, ILOAD = 1mA to 120mA Time (100μs/Div) Time (100μs/Div) Noise 30 20 PSRR RT9030-17GU5, VIN = 3.3V ±50mV IOUT = 120mA 10 PSRR (dB) 0 VOUT (100uV/Div) IOUT = 50mA -10 -20 IOUT = 10mA -30 -40 -50 -60 RT9030-17GU5, VIN = 4.5V (Battery), ILOAD = 50mA Time (10ms/Div) -70 -80 10 100 1000 10000 100000 1000000 Frequency (Hz) Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 is a registered trademark of Richtek Technology Corporation. DS9030-04 December 2013 RT9030 Applications Information Capacitor Selection Thermal Shutdown Protection In order to confirm the regulator stability and performance, X7R/X5R or other better quality ceramic capacitor should be selected. As the die temperature is > 150°C , the chip will enter protection mode. The power MOSFET will turn-off during protection mode to prevent abnormal operation. Like any low-dropout regulator, the external capacitors used with the RT9030 must be carefully selected for regulator stability and performance. Using a capacitor whose value is larger than 1μF on the RT9030 input and the amount of capacitance can be increased without limit. The input capacitor should be located in a distance of no more than 0.5 inch from the input pin of the IC and returned to a clean analog ground. The capacitor with larger value and lower ESR (equivalent series resistance) provides better PSRR and line-transient response. The output capacitor must meet both requirements for minimum amount of capacitance in all LDOs application. The RT9030 is designed specifically to work with low ESR ceramic output capacitor in space-saving and performance consideration. Using a ceramic capacitor whose value is at least 1μF on the RT9030 output ensures stability. Output capacitor with larger capacitance can reduce noise and improve load transient response, stability, and PSRR. The output capacitor should be located in a distance of no more than 0.5 inch from the VOUT pin of the RT9030 and returned to a clean analog ground. Enable The RT9030 goes into shutdown mode when the EN pin is in a logic low condition. During this condition, the pass transistor, error amplifier, and bandgap are turned off, reducing the supply current to 0.7μA typical. The EN pin can be directly tied to VIN to keep the part on. Current limit The RT9030 contains an independent current limiter, which monitors and controls the pass transistor's gate voltage, limiting the output current to 285mA (typ.). The output can be shorted to ground indefinitely without damaging the part. Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9030-04 December 2013 Thermal Considerations Thermal protection limits power dissipation in the RT9030. When the operation junction temperature exceeds 170°C , the OTP circuit starts the thermal shutdown function and turns the pass element off. The pass element turn on again after the junction temperature cools by 30°C. For continuous operation, do not exceed absolute maximum operation junction temperature 125°C. The power dissipation definition in device is : PD = (VIN − VOUT) x IOUT + VIN x IQ The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula : PD(MAX) = ( TJ(MAX) − TA ) / θJA Where T J(MAX) is the maximum operation junction temperature, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating conditions specification the maximum junction temperature of the die is 125°C. The junction to ambient thermal resistance θJA for WDFN-6L 1.6x1.6 package is 165°C/W and SC-70-5 package is 333°C/W on the standard JEDEC 51-3 single-layer thermal test board. The maximum power dissipation at TA = 25°C can be calculated by following formula : PD(MAX) = (125°C − 25°C) / (165°C/W) = 0.606W for WDFN-6L 1.6x1.6 packages PD(MAX) = (125°C − 25°C) / (333°C/W) = 0.300W for SC-70-5 packages The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θJA. The Figure 3 of derating curves allows the is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9030 designer to see the effect of rising ambient temperature on the maximum power allowed. 0.8 Single Layer PCB Power Dissipation (W) 0.7 WDFN-6L 1.6x1.6 0.6 Layout Considerations Careful PCB Layout is necessary for better performance. The following guidelines should be followed for good PCB layout. Place the input and output capacitors as close as possible to the IC. Keep VIN and VOUT trace as possible as short and wide. Use a large PCB ground plane for maximum thermal dissipation. 0.5 0.4 SC-70-5 0.3 0.2 0.1 0 0 25 50 75 100 125 CIN should be placed as close as possible to VIN pin for good filtering. VIN Ambient Temperature (°C) Figure 3. Derating Curve of Maximum Power Dissipation VIN 1 GND 2 EN 3 COUT should be placed as close as possible to VOUT pin for good filtering. VOUT 5 VOUT CIN COUT 4 NC GND The through hole of the GND pin is recommended to be as many as possible. Figure 4 Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 is a registered trademark of Richtek Technology Corporation. DS9030-04 December 2013 RT9030 Outline Dimension H D L B C b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.800 1.100 0.031 0.044 A1 0.000 0.100 0.000 0.004 B 1.150 1.350 0.045 0.054 b 0.150 0.400 0.006 0.016 C 1.800 2.450 0.071 0.096 D 1.800 2.250 0.071 0.089 e 0.650 0.026 H 0.080 0.260 0.003 0.010 L 0.210 0.460 0.008 0.018 SC-70-5 Surface Mount Package Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9030-04 December 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9030 D2 D L E E2 1 e 2 b A A1 SEE DETAIL A 1 2 1 DETAIL A Pin #1 ID and Tie Bar Mark Options A3 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 0.700 0.800 0.028 0.031 A1 0.000 0.050 0.000 0.002 A3 0.175 0.250 0.007 0.010 b 0.200 0.300 0.008 0.012 D 1.550 1.650 0.061 0.065 D2 0.950 1.050 0.037 0.041 E 1.550 1.650 0.061 0.065 E2 0.550 0.650 0.022 0.026 e L 0.500 0.190 0.020 0.290 0.007 0.011 W-Type 6L DFN 1.6x1.6 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 DS9030-04 December 2013