RT9030 150mA, Low Input Voltage, Low Dropout, Low Noise UltraFast Without Bypass Capacitor CMOS LDO Regulator General Description 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 25A, 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 0.7A in shutdown mode and has fast turn-on time less than 40s. 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 : Applications 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. 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 1 F Output Capacitor Required for Stability TTL-Logic-Controlled Shutdown Input RoHS Compliant and Halogen Free 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 Features 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. DS9030-03 April 2011 www.richtek.com 1 RT9030 Typical Application Circuit VIN VIN CIN 1F/X7R Chip Enable VOUT VOUT COUT 1F/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 1A Current Limit VREF + VIN MOS Driver VOUT GND www.richtek.com 2 DS9030-03 April 2011 RT9030 Absolute Maximum Ratings (Note 1) Supply Input Voltage -----------------------------------------------------------------------------------------------------EN Input Voltage ----------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25C SC-70-5 ---------------------------------------------------------------------------------------------------------------------WDFN-6L 1.6x1.6 --------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) SC-70-5, JA ---------------------------------------------------------------------------------------------------------------WDFN-6L 1.6x1.6, JA ---------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM -------------------------------------------------------------------------------------------------------------------------MM ---------------------------------------------------------------------------------------------------------------------------- Recommended Operating Conditions 6V 6V 0.3W 0.571W 333C/W 175C/W 260C 150C -65C to 150C 2kV 200V (Note 4) Input Voltage Range ------------------------------------------------------------------------------------------------------ 1.65V to 5.5V Junction Temperature Range -------------------------------------------------------------------------------------------- -40C to 125C Ambient Temperature Range -------------------------------------------------------------------------------------------- -40C to 85C Electrical Characteristics (VIN = VOUT + 0.5V, VEN = VIN, CIN = COUT = 1F/X5R (Ceramic), TA = 25C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Output Noise Voltage VON IOUT = 0mA -- 30 -- VRMS Output Voltage Accuracy (Fixed Output Voltage) VOUT IOUT = 150mA -2 0 2 % Quiescent Current IQ IOUT = 0mA -- 25 50 A Shutdown Current ISHDN VEN = 0V -- 0.7 1.5 A 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 IEN PSRR 1mA < IOUT < 150mA 1.65V VIN 5.5V mV % V A dB To be continued DS9030-03 April 2011 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 TSD -- 20 -- C 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. JA is measured in the natural convection at TA = 25C on a low effective thermal conductivity single layer test board of JEDEC 51-3 thermal measurement standard. 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. www.richtek.com 4 DS9030-03 April 2011 RT9030 Typical Operating Characteristics Output Voltage vs. Temperature Quiescent Current vs. Temperature 1.80 31 Quiescent Current (uA) 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 5 20 Temperature (C) Dropout Voltage vs. Load Current 50 65 80 95 110 125 Dropout Voltage vs. Load Current 0.18 0.12 0.16 0.10 125C 25C 0.08 0.06 -40C 0.04 0.02 RT9030-33GU5 0.00 0 25 50 75 100 125 Dropout Voltage (V) Dropout Voltage (V) 35 Temperature (C) 0.14 25C 0.12 0.10 -40C 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 (10s/Div) 125 150 RT9030-17GU5, VIN = 3.3V, ILOAD = 50mA RT9030-17GU5, VIN = 3.3V, ILOAD = 50mA DS9030-03 April 2011 125C Time (50s/Div) 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 (100s/Div) Time (100s/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 (100s/Div) Time (100s/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) www.richtek.com 6 DS9030-03 April 2011 RT9030 Applications Information Capacitor Selection be shorted to ground indefinitely without damaging the part. In order to confirm the regulator stability and performance, X7R/X5R or other better quality ceramic capacitor should be selected. The output capacitor must meet both requirements for minimum amount of capacitance and ESR 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 1F with ESR is > 30m on the RT9030 output ensures stability. The RT9030 still works well with output capacitor of other types due to the wide stable ESR range. Figure 1 shows the curves of allowable ESR range as a function of load current for various output capacitor values. 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 0.7A 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 DS9030-03 April 2011 Region of ESR Region of Stable Stable C COUT ESR() () OUT 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 1F 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. Region of Stable COUT ESR vs. Load Current 100 Unstable Region 10 1 Stable Region 0.1 Simulation Verify Unstable Region 0.01 VOUT = 3.3V, VIN = 5V, CIN = COUT = 1F/X7R 0.001 0 30 60 90 120 150 Load Current (mA) Figure 1. Region of Stable output capacitor ESR Thermal Shutdown Protection As the die temperature is > 150C , the chip will enter protection mode. The power MOSFET will turn-off during protection mode to prevent abnormal operation. Thermal Considerations Thermal protection limits power dissipation in the RT9030. When the operation junction temperature exceeds 170C , 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 30C. For continuous operation, do not exceed absolute maximum operation junction temperature 125C. 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 ) / JA www.richtek.com 7 RT9030 Where T J(MAX) is the maximum operation junction temperature, TA is the ambient temperature and the JA is the junction to ambient thermal resistance. For recommended operating conditions specification of RT9030, the maximum junction temperature of the die is 125C. The junction to ambient thermal resistance JA for WDFN-6L 1.6x1.6 package is 165C/W and SC-70-5 package is 333C/W on the standard JEDEC 51-3 singlelayer thermal test board. The maximum power dissipation at TA = 25C can be calculated by following formula : PD(MAX) = (125C - 25C) / (165C/W) = 0.606W for WDFN-6L 1.6x1.6 packages PD(MAX) = (125C - 25C) / (333C/W) = 0.300W for SC-70-5 packages The maximum power dissipation depends on operating ambient temperature for fixed TJ(MAX) and thermal resistance JA. For RT9030 packages, the Figure 2 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. 0.8 Single Layer PCB Power Dissipation (W) 0.7 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. CIN should be placed as close as possible to VIN pin for good filtering. VIN 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 3 WDFN-6L 1.6x1.6 0.6 0.5 0.4 SC-70-5 0.3 0.2 0.1 0 0 25 50 75 100 125 Ambient Temperature (C) Figure 2. Derating Curves for RT9030 Packages www.richtek.com 8 DS9030-03 April 2011 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 DS9030-03 April 2011 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 Richtek Technology Corporation Headquarter Taipei Office (Marketing) 5F, No. 20, Taiyuen Street, Chupei City 5F, No. 95, Minchiuan Road, Hsintien City Hsinchu, Taiwan, R.O.C. Taipei County, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Tel: (8862)86672399 Fax: (8862)86672377 Email: marketing@richtek.com Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek. www.richtek.com 10 DS9030-03 April 2011