RT9013B 300mA, Low Dropout, Low Noise Ultra-Fast Without Bypass Capacitor CMOS LDO Regulator General Description The RT9013B is a high-performance, 300mA LDO regulator, offering extremely high PSRR and ultra-low dropout. The RT9013B is Ideal for portable RF and wireless applications with demanding performance and space requirements. The RT9013B provides quiescent current to be as low as 25uA to extend the battery life. The RT9013B also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, especially for hand-held wireless devices. The RT9013B consumes typical 0.7uA in shutdown mode and has fast turn-on time to be less than 40us. The other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. The RT9013B is available in the SC-70-5 and WDFN-6L 1.6x1.6 packages. Ordering Information RT9013B- Note : Features Wide Operating Voltage Range : 2.2V to 5.5V Low Dropout : 150mV at 300mA Ultra-Low-Noise for RF Application Ultra-Fast in Line/Load Transient Response Current Limiting Protection Thermal Shutdown Protection High Power Supply Rejection Ratio Only 1uF Output Capacitor Required for Stability TTL-Logic-Controlled Shutdown Input RoHS Compliant and 100% Lead (Pb)-Free Applications CDMA/GSM Cellular Handsets Portable Information Appliances Laptop, Palmtops, Notebook Computers Hand-Held Instruments Mini PCI & PCI-Express Cards PCMCIA & New Cards Package Type U5 : SC-70-5 QWC : WDFN-6L 1.6x1.6 (W-Type) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) Marking Information Fixed Output Voltage 12 : 1.2V 13 : 1.3V : 34 : 3.4V 35 : 3.5V 1B : 1.25V 1H : 1.85V 2H : 2.85V Pin Configurations For marking information, contact our sales representative directly or through a Richtek distributor located in your area. (TOP VIEW) VOUT NC 5 4 VIN GND EN Suitable for use in SnPb or Pb-free soldering processes. EN GND VIN 1 2 3 GND RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. ` 3 SC-70-5 Richtek products are : ` 2 7 6 5 4 NC NC VOUT WDFN-6L 1.6x1.6 DS9013B-02 April 2011 www.richtek.com 1 RT9013B Typical Application Circuit VIN VIN CIN 1uF/X7R VOUT VOUT COUT 1uF/X7R RT9013B Chip Enable EN Rpull_down NC GND 100k Functional Pin Description Pin No. Pin Name Pin Function SC-70-5 WDFN-6L 1.6x1.6 1 3 VIN Supply Input. 2 2, 7 (Exposed Pad) GND Common Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. 3 1 EN Chip Enable (Active High). It is recommended to add a 100kΩ resistor between the EN and GND. 4 5, 6 NC No Internal Connection. 5 4 VOUT Regulator Output. Function Block Diagram EN Current Limit POR OTP VIN VREF + MOS Driver VOUT GND www.richtek.com 2 DS9013B-02 April 2011 RT9013B 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 -------------------------------------------------------------------------------------------------------------------------MM ---------------------------------------------------------------------------------------------------------------------------- Recommended Operating Conditions 6V 6V 0.3W 0.606W 333°C/W 165°C/W 260°C 150°C −65°C to 150°C 2kV 200V (Note 4) Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.2V 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 = 1uF/X7R (Ceramic), TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit 2.2 -- 5.5 V Input Voltage Range V IN Output Noise Voltage Output Voltage Accuracy (Fixed Output Voltage) V ON V OUT = 1.5V -- 30 -- uVRMS ΔVOUT IOUT = 10mA −2 0 +2 % Quiescent Current IQ V EN = 5V, IOUT = 0mA -- 25 50 uA Shutdown Current ISHDN V EN = 0V -- 0.7 1.5 uA Current Limit ILIM RLOAD = 0Ω, 2.2V ≤ VIN < 5.5V 300 400 600 mA -- 125 240 mV -- -- 0.6 Dropout Voltage (Note 5) (Note 6) Load Regulation (Note 7) (Fixed Output Voltage) EN Threshold V DROP IOUT = 300mA ΔVLOAD 1mA < IOUT < 300mA 2.2V ≤ VIN < 2.7V 1mA < IOUT < 300mA 2.7V ≤ VIN ≤ 5.5V % -- -- 1 Logic-Low Voltage V IL 0 -- 0.6 Logic-High Voltage V IH 1.6 -- 5.5 -- 0.1 1 uA V Enable Pin Current IEN Power Supply Rejection Rate PSRR IOUT = 100mA, f = 10kHz -- −50 -- dB Line Regulation ΔVLINE V IN = (V OUT + 0.5) to 5.5V, IOUT = 1mA -- 0.01 0.2 %/V Thermal Shutdown Temperature T SD -- 170 -- Thermal Shutdown Hysteresis ΔTSD -- 30 -- DS9013B-02 April 2011 °C www.richtek.com 3 RT9013B 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. θJA is measured in the natural convection at TA = 25°C 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 300mA. www.richtek.com 4 DS9013B-02 April 2011 RT9013B Typical Operating Characteristics (CIN = COUT = 1μ/X7R, unless otherwise specified) Output Voltage vs. Temperature 1.60 Quiescent Current vs. Temperature 30 VIN = 2.5V 1.58 Quiescent Current (uA) 1.56 Output Voltage (V) VIN = 2.5V 28 1.54 1.52 1.50 1.48 1.46 1.44 26 24 22 20 18 16 14 12 1.42 10 1.40 -50 -25 0 25 50 75 100 -50 125 Temperature (°C) Dropout Voltage vs. Load Current 120 −40°C 60 40 20 VOUT = 2.5V 0 0 50 100 150 200 250 EN Pin Voltage (V) 25°C 140 Output Voltage (V) Dropout Voltage (mV) 160 80 25 50 75 100 125 EN Pin Shutdown Response 125°C 100 0 Temperature (°C) 200 180 -25 VIN = 2.5V, ILOAD = 50mA 4 RT9013B-15PU5 2 0 2 1 0 300 Time (100μs/Div) Load Current (mA) 2 0 1.0 0.5 0 Time (5μs/Div) DS9013B-02 April 2011 VIN = 2.6V to 3.6V, ILOAD = 10mA Input Voltage Deviation (V) 4 VIN = 2.5V, ILOAD = 75mA RT9013B-15PU5 Line Transient Response Output Voltage Deviation (mV) Output Voltage (V) EN Pin Voltage (V) Start Up 3.6 2.6 20 0 -20 RT9013B-15PU5 Time (100μs/Div) www.richtek.com 5 RT9013B Line Transient Response Noise VIN = 3.0V (By Battery), No Load 300 3.6 Noise (μV/Div) Output Voltage Deviation (mV) Input Voltage Deviation (V) VIN = 2.6V to 3.6V, ILOAD = 100mA 2.6 20 0 200 100 0 -100 -200 -20 -300 RT9013B-15PU5 Time (100μs/Div) Time (10ms/Div) Noise Load Transient Response VIN = 3.0V (By Battery), ILOAD = 10mA Load Current (mA) VIN = 2.5V, ILOAD = 10mA to 100mA 300 200 100 100 50 0 0 Output Voltage Deviation (mV) Noise (μV/Div) RT9013B-15PU5 -100 -200 -300 RT9013B-15PU5 Time (10ms/Div) 20 50 0 -50 RT9013B-15PU5 Time (100μs/Div) PSRR VIN = 2.5V to 2.6V 10 0 PSRR(dB) -10 -20 -30 -40 -50 -60 ILOAD = 100mA ILOAD = 10mA -70 10 100 1000 10000 100000 1000000 Frequency (Hz) www.richtek.com 6 DS9013B-02 April 2011 RT9013B Applications Information Like any low-dropout regulator, the external capacitors used with the RT9013B must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1uF / X7R on the RT9013B input and the amount of capacitance can be increased without limit. The input capacitor must be located at a distance of not more than 0.5 inch from the input pin of the IC and returned to a clean analog ground. Any good quality ceramic can be used for this capacitor. 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 and ESR in all LDOs application. The RT9013B 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 1uF with ESR is > 20mΩ on the RT9013B output ensures stability. The RT9013B 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 of larger capacitance can reduce noise and improve load transient response, stability, and PSRR. The output capacitor should be located not more than 0.5 inch from the VOUT pin of the RT9013B and returned to a clean analog ground. Region of Stable COUT ESR vs. Load Current RegionofofStable StableCCOUT OUT ESR Region ESR (Ω) (Ω) 100 1 Stable Range 0.01 Unstable Range 0.001 0 50 100 150 200 Load Current (mA) Figure 1 DS9013B-02 April 2011 250 logic and cannot be left floating. PSRR The power supply rejection ratio (PSRR) is defined as the gain from the input to output divided by the gain from the supply to the output. The PSRR is found to be ⎛ ⎞ PSRR = 20 × log⎜ ΔGain Error ⎟ ⎝ ΔSupply ⎠ Note that in heavy load measuring, Δsupply will cause Δtemperature. And Δtemperature will cause Δoutput voltage. So the temperature effect is include in heavy load PSRR measuring. Current Limit The RT9013B contains an independent current limiter, which monitors and controls the pass transistor's gate voltage, limiting the output current to 0.4A (typ.). The output can be shorted to ground indefinitely without damaging the part. Thermal Considerations For continuous operation, do not exceed absolute maximum operation junction temperature 125°C. The power dissipation definition in the device is calculated as follows : 0.1 VIN = 5V CIN = COUT = 1uF/X7R The RT9013B goes into sleep mode when the EN pin is in a logic low condition. During this condition, the RT9013B has an EN pin to turn on or turn off the regulator, When the EN pin is logic hight the regulator will be turned on. The supply current to 0.7uA typical. The EN pin may be directly tied to VIN to keep the part on. The Enable input is CMOS Thermal protection limits power dissipation in the RT9013B. 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 will be turned on again after the junction temperature cools by 30°C. Unstable Range 10 Enable 300 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 www.richtek.com 7 RT9013B 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 of the RT9013B, where T J(MAX) is the maximum junction temperature of the die (125°C) and TA is the operated ambient temperature. The junction to ambient thermal resistance for SC-70-5 package is 333°C/W and WDFN-6L 1.6x1.6 package is 165°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) / (333°C/W) = 0.3W for SC-70-5 packages PD(MAX) = (125°C − 25°C) / (165°C/W) = 0.606W for WDFN-6L 1.6x1.6 packages The maximum power dissipation depends on operating ambient temperature for fixed TJ(MAX) and thermal resistance θJA. For RT9013B 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 0.6 WDFN-6L 1.6x1.6 0.5 0.4 0.3 SC-70-5 0.2 0.1 0 0 25 50 75 100 125 Ambient Temperature (°C) Figure 2. Derating Curves for RT9013B Packages www.richtek.com 8 DS9013B-02 April 2011 RT9013B Outline Dimension H D L B C b A A1 e Dimensions In Millimeters Dimensions In Inches Symbol 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 DS9013B-02 April 2011 www.richtek.com 9 RT9013B D2 D L E E2 1 e b A A1 SEE DETAIL A 2 1 2 1 A3 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. Dimensions In Millimeters Dimensions In Inches Symbol 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: [email protected] 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 DS9013B-02 April 2011