RT9013A 120mA, Low Dropout, Low Noise Ultra-Fast Without Bypass Capacitor CMOS LDO Regulator General Description The RT9013A is a high-performance, 120mA LDO regulator, offering extremely high PSRR and ultra-low dropout. The chip is ideal for portable RF and wireless applications with demanding performance and space requirements. The RT9013A provides quiescent current to be as low as 25uA to extend the battery life. The RT9013A also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, especially for hand-held wireless devices. The RT9013A consumes typical 0.7uA in shutdown mode and has fast turn-on time less than 40us. 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 SC-82 packages. Ordering Information RT9013APackage Type U5 : SC-70-5 Y : SC-82 Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) Note : Fixed Output Voltage 12 : 1.2V 13 : 1.3V : 34 : 3.4V 35 : 3.5V 1B : 1.25V 1H : 1.85V 2H : 2.85V Richtek products are : ` RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. ` Features Wide Operating Voltage Ranges : 2.2V to 5.5V Low Dropout : 60mV at 120mA Ultra-Low-Noise for RF Application Ultra-Fast Response in Line/Load Transient Current Limiting Protection Thermal Shutdown Protection High Power Supply Rejection Ratio Output Only 1uF 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 Pin Configurations (TOP VIEW) VOUT NC VIN VOUT 5 4 4 3 VIN 2 3 GND EN SC-70-5 2 EN GND SC-82 Note : Pin2 of SC-82 is wider than other pins. Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Suitable for use in SnPb or Pb-free soldering processes. DS9013A-02 April 2011 www.richtek.com 1 RT9013A Typical Application Circuit VIN VIN CIN 1uF/X7R VOUT VOUT COUT 1uF/X7R RT9013A Chip Enable EN Rpull_down 100k NC GND Functional Pin Description Pin No. SC-70-5 Pin Name SC-82 Pin Function 1 4 VIN Supply Input 2 2 GND Common Ground 3 1 EN 4 -- NC No Internal Connection 5 3 VOUT Regulator Output Enable Input Logic, Active High. When the EN goes to a logic low, the device will be shutdown mode. Function Block Diagram EN Current Limit POR OTP VIN VREF + MOS Driver VOUT GND www.richtek.com 2 DS9013A-02 April 2011 RT9013A Absolute Maximum Ratings (Note 1) Supply Input Voltage -----------------------------------------------------------------------------------------------------EN Input Voltage ----------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C SC-70-5/SC-82 ------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) SC-70-5/SC-82, θJA ------------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM -------------------------------------------------------------------------------------------------------------------------MM ---------------------------------------------------------------------------------------------------------------------------- Recommended Operating Conditions 6V 6V 0.3W 333°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 (Ceramic, X7R), 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 V ON V OUT = 1.5V, COUT = 1uF, IOUT = 0mA -- 30 -- uV RMS Output Voltage Accuracy (Fixed Output Voltage) 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 130 200 300 mA IOUT = 120mA, 2.2V ≤ VOUT < 3V -- 70 140 IOUT = 120mA, 3V ≤ VOUT ≤ 5.5V -- 60 140 -- -- 0.6 Dropout Voltage (Note 5) (Note 6) Load Regulation (Note 7) (Fixed Output Voltage) EN Threshold V DROP ΔVLOAD 1mA < IOUT < 120mA 2.2V ≤ VIN < 2.7V 1mA < IOUT < 120mA 2.7V ≤ VIN ≤ 5.5V mV % -- -- 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 f = 10kHz, IOUT = 100mA -- −50 -- dB Line Regulation ΔVLINE V IN = (V OUT+0.5) to 5.5V, IOUT = 1mA -- 0.01 0.2 %/V To be continued DS9013A-02 April 2011 www.richtek.com 3 RT9013A Parameter Symbol Test Conditions Min Typ Max Thermal Shutdown Temperature TSD -- 170 -- Thermal Shutdown Hysteresis ΔT SD -- 30 -- Unit °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. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity 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 DS9013A-02 April 2011 RT9013A Typical Operating Characteristics (CIN = COUT = 1u/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 EN Pin Voltage (V) 25°C 50 75 100 125 VIN = 2.5V, ILOAD = 50mA 4 VOUT = 1.5V 2 0 50 40 −40°C 30 20 10 VOUT = 2.5V Output Voltage (V) Dropout Voltage (mV) 125°C 60 25 EN Pin Shutdown Response 90 70 0 Temperature (°C) 100 80 -25 2 1 0 0 0 20 40 60 80 100 Time (100us/Div) 120 Load Current (mA) 2 0 1.0 0.5 0 Time (5us/Div) DS9013A-02 April 2011 Input Voltage Deviation (V) 4 VIN = 2.5V, ILOAD = 75mA VOUT = 1.5V Line Transient Response Output Voltage Deviation (mV) Output Voltage (V) EN Pin Voltage (V) Start Up VIN = 2.6V to 3.6V, ILOAD = 10mA VOUT = 1.5V 3.6 2.6 20 0 -20 Time (100us/Div) www.richtek.com 5 RT9013A Noise VIN = 3.0V (By Battery), No Load 300 VOUT = 1.5V VIN = 2.6V to 3.6V, ILOAD = 100mA VOUT = 1.5V 3.6 Noise (μV/Div) Output Voltage Deviation (mV) Input Voltage Deviation (V) Line Transient Response 2.6 20 100 0 -100 0 -200 -20 -300 Time (100us/Div) Time (10ms/Div) Noise Load Transient Response Load Current (mA) VIN = 3.0V (By Battery), ILOAD = 10mA 300 VOUT = 1.5V 200 100 100 VIN = 2.5V, ILOAD = 10mA to 100mA VOUT = 1.5V 50 0 0 Output Voltage Deviation (mV) Noise (μV/Div) 200 -100 -200 -300 Time (10ms/Div) 20 50 0 -50 Time (100us/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 DS9013A-02 April 2011 RT9013A Applications Information Like any low-dropout regulator, the external capacitors used with the RT9013A must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1uF / X7R on the RT9013A input and the amount of capacitance can be increased without limit. The input capacitor must be located 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 RT9013A 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 RT9013A output ensures stability. The RT9013A 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 RT9013A and returned to a clean analog ground. Enable The RT9013A goes into sleep mode when the EN pin is in a logic low condition. During this condition, the RT9013A has an EN pin to turn on or turn off 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 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 when heavy load measuring, Δsupply will cause Δtemperature. And Δtemperature will cause Δoutput voltage. So the heavy load PSRR measuring is include temperature effect. Current limit The RT9013A contains an independent current limiter, which monitors and controls the pass transistor's gate voltage, limiting the output current to 0.2A (typ.). The output can be shorted to ground indefinitely without damaging the part. Thermal Considerations Region of Stable COUT ESR vs. Load Current Region of Stable COUT ESR (Ω) 100 Unstable Range 10 1 Stable Range For continuous operation, do not exceed absolute maximum operation junction temperature 125°C. The power dissipation definition in device is : 0.1 0.01 VIN = 5V CIN = COUT = 1uF/X7R Unstable Range PD = (VIN − VOUT) x IOUT + VIN x IQ 0.001 0 100 200 300 Load Current (mA) Figure 1 DS9013A-02 April 2011 400 Thermal protection limits power dissipation in RT9013A. 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. 500 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 www.richtek.com 7 RT9013A 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 RT9013A, 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/SC-82 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) / 333°C/W = 0.3W for SC-70-5/ SC-82 packages The maximum power dissipation depends on operating ambient temperature for fixed TJ(MAX) and thermal resistance θJA. For RT9013A packages, the Figure 2 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. 0.7 Single Layer PCB Power Dissipation (W) 0.6 0.5 0.4 SC-70-5/SC-82 0.3 0.2 0.1 0 0 12.5 25 37.5 50 62.5 75 87.5 100 113 125 Ambient Temperature (°C) Figure 2. Derating Curves for RT9013A Packages www.richtek.com 8 DS9013A-02 April 2011 RT9013A 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 DS9013A-02 April 2011 www.richtek.com 9 RT9013A D e H L B C b1 b A A1 e Dimensions In Millimeters Dimensions In Inches Symbol 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 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 DS9013A-02 April 2011