RT9010 300mA LDO Regulator with POR General Description Features RT9010 is a low noise, and low dropout with the sourcing ability up to 300mA and power-on reset function. The range of output voltage is from 1.2V to 3.6V by operating from 2.5V to 5.5V input. z Wide Operating Voltage Ranges : 2.5V to 5.5V z Low-Noise for RF Application No Noise Bypass Capacitor Required Fast Response in Line/Load Transient TTL-Logic-Controlled Shutdown Input Low Temperature Coefficient 300mA LDO Outputs High Accuracy 2% Short Circuit Protection Thermal Shutdown Protection Current Limit Protection Short Circuit Thermal Folded Back Protection Tiny TSOT-23-6 Package RoHS Compliant and 100% Lead (Pb)-Free RT9010 offers 2% accuracy, extremely low dropout voltage (240mV @ 300mA), and extremely low ground current. The shutdown current is near zero current which is suitable for battery-power devices. Other features include current limiting, over temperature, output short circuit protection. z z z z z z z z RT9010 is short circuit thermal folded back protected. RT9010 lowers its OTP trip point from 165C to 110C when output short circuit occurs (VOUT < 0.4V) providing maximum safety to end users. RT9010 can operate stably with very small ceramic output capacitors, reducing required board space and component cost. RT9010 is available in fixed output voltages in the TSOT-23-6 package. z z z z Applications z z z Ordering Information z RT9010- z Package Type J6 : TSOT-23-6 Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) Output Voltage 12 : 1.20V 13 : 1.30V : : 35 : 3.50V 36 : 3.60V 1H : 1.85V 2F : 2.65V 2H : 2.85V Note : Richtek products are : RoHS compliant and compatible with the current require- z CDMA/GSM Cellular Handsets Battery-Powered Equipment Laptop, Palmtops, Notebook Computers Hand-Held Instruments PCMCIA Cards Portable Information Appliances Pin Configurations (TOP VIEW) VIN 6 EN SET 5 4 2 3 VOUT GND POR TSOT-23-6 Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. DS9010-05 April 2011 www.richtek.com 1 RT9010 Typical Application Circuit 100K 6 VIN VIN POR 1uF 3 POR RT9010 Chip Enable 5 4 VOUT 1 1uF EN SET GND VOUT 2 CDELAY Functional Pin Description Pin No. Pin Name Pin Function 1 VOUT Output Voltage. 2 GND Common Ground. 3 POR Power-On Reset Output : Open-drain output. Active low indicates an output under voltage condition on regulator. 4 SET Delay Set Input. Connect external capacitor to GND to set the internal delay. 5 EN Chip Enable (Active High). 6 VIN Supply Input Voltage. Function Block Diagram EN Shutdown and Logic Control 0.2uA VIN - VREF + Error Amplifier MOS Driver VOUT Current Limit and Thermal Protection GND SET www.richtek.com 2 POR & Delay DS9010-05 April 2011 RT9010 Absolute Maximum Ratings z z z z z z z z (Note 1) Supply Input Voltage -----------------------------------------------------------------------------------------------------Other I/O Pin Voltages --------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25C TSOT-23-6 ------------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) TSOT-23-6, JA ------------------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM (Human Body Mode) ---------------------------------------------------------------------------------------------MM (Machine Mode) ------------------------------------------------------------------------------------------------------ Recommended Operating Conditions z z z z -0.3V to 6V -0.3V to 6V 0.455W 220C/W 260C 150C -65C to 150C 2kV 200V (Note 4) Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.5V to 5.5V Enable Input Voltage ------------------------------------------------------------------------------------------------------ 0V to 5.5V Junction Temperature Range -------------------------------------------------------------------------------------------- -40C to 125C Ambient Temperature Range -------------------------------------------------------------------------------------------- -40C to 85C Electrical Characteristics (VIN = VOUT + 1V, VEN = VIN, CIN = COUT = 1F, TA = 25C, unless otherwise specified.) Parameter Symbol Input Voltage Dropout Voltage VIN (Note 5) VDROP Test Conditions Min Typ Max Unit 2.5 -- 5.5 V IOUT = 150mA, VOUT > 2.8V -- 120 -- mV IOUT = 300mA, VOUT > 2.8V -- 240 -- mV 1.2 -- 3.6 V VIN = 2.5V to 5.5V Output Voltage Range VOUT Output Voltage Accuracy VOUT IOUT = 1mA -2 -- +2 % Line Regulation VLINE VIN = (V OUT + 0.3V) to 5.5V or VIN > 2.5V, whichever is larger -- -- 0.2 %/V Load Regulation VLOAD 1mA < IOUT < 300mA -- -- 0.6 % Current Limit ILIM RLOAD = 1 330 450 700 mA Quiescent Current IQ VEN > 1.5V -- 58 80 A Shutdown Current IQ_SD VEN < 0.4V -- -- 1 A EN Threshold Voltage Logic-High VIH VIN = 2.5V to 5.5V, Power On 1.5 -- -- Logic-Low VIN = 2.5V to 5.5V, Shutdown -- -- 0.4 -- 100 -- ppm/C VIL Output Voltage TC V Thermal Shutdown T SD -- 170 -- C Thermal Shutdown Hysteresis TSD -- 40 -- C To be continued DS9010-05 April 2011 www.richtek.com 3 RT9010 Parameter PSRR Loading=10mA PSRR Loading=150mA Symbol Min Typ Max Unit f =100Hz -- -65 -- dB f =1kHz -- -60 -- dB f =10kHz -- -50 -- dB f =100Hz -- -65 -- dB f =1kHz -- -50 -- dB f =10kHz -- -50 -- dB VTHL Low Threshold, % of nominal V OUT (Flag On) 90 -- -- % VTHH High Threshold, % of nominal V OUT (Flag Off) -- -- 96 % PSRR PSRR Test Conditions Reset Threshold POR Output Logic Low Voltage VPOR_L IL = 250A -- 0.02 0.1 V POR Leakage Current IPOR Flag off -1 0.01 1 A Set pin current source VSET = 0 0.60 1.25 1.70 A Set pin threshold POR = high -- 1.4 -- V 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 test board of JEDEC 51-3 thermal measurement standard. Note 3. Devices are ESD sensitive. Handling precaution recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Note 5. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) - 100mV. www.richtek.com 4 DS9010-05 April 2011 RT9010 Typical Operating Characteristics Output Voltage vs. Temperature Output Voltage vs. Temperature 3.4 RT9010-18 1.85 Output Voltage (V) Output Voltage (V) 1.9 1.8 1.75 RT9010-33 3.35 3.3 3.25 3.2 1.7 -50 -25 0 25 50 75 100 -50 125 -25 0 Temperature (C) RT9010-33 VIN = VEN = 4.3V CIN = COUT 1uF/X7R 100 125 RT9010-33 TJ = 125C 300 60 55 250 TJ = 25C 200 150 TJ = -40C 100 50 50 0 -50 -25 0 25 50 75 100 0 125 50 Temperature (C) 0 PSRR 10000 RT9010-15 VIN = 4.3V 0.1V CIN = COUT 1uF/X7R ILOAD = 100mA ILOAD = 50mA -20 -40 ILOAD = 10mA -60 -80 0.01 10 0.1 100 1 1000 10k 10000 Frequency (Hz) (Hz) DS9010-05 April 2011 100 150 200 250 300 Load Current (mA) 100k 100000 1000k 1000000 POR Delay Time (ms) 20 PSRR (dB) 75 Dropout Voltage vs. Load Current 350 Dropout Voltage (mV) Quiescent Current (uA) 65 50 Temperature (C) Quiescent Current vs. Temperature 70 25 POR Delay RT9010-28 1000 100 10 1 0.1 0.01 0.0001 0.0001 0.0010 0.001 0.0100 0.01 0.1000 0.1 1.0000 1 POR Setting Capacitance (uF) www.richtek.com 5 RT9010 Line Transient Response Line Transient Response RT9010-28, Both ILOAD = 10mA VIN = 3.8V to 4.8V RT9010-28, Both ILOAD = 1mA VIN = 3.8V to 4.8V 4.8 4.8 VIN (V) 3.8 VIN (V) 3.8 VOUT (10mV/Div) VOUT (10mV/Div) Time (100s/Div) Time (100s/Div) Line Transient Response Line Transient Response RT9010-28, Both ILOAD = 50mA VIN = 3.8V to 4.8V RT9010-28, Both ILOAD = 100mA VIN = 3.8V to 4.8V 4.8 4.8 VIN (V) 3.8 VIN (V) 3.8 VOUT (10mV/Div) VOUT (10mV/Div) Time (100s/Div) Time (100s/Div) Load Transient Response Load Transient Response RT9010-33, ILOAD = 10mA to 100mA VIN = VEN = 4.3V CIN = COUT = 1uF/X7R RT9010-33, ILOAD = 10mA to 50mA VIN = VEN = 4.3V CIN = COUT = 1uF/X7R IOUT (50mA/Div) IOUT (100mA/Div) VOUT (20mV/Div) VOUT (20mV/Div) Time (250s/Div) www.richtek.com 6 Time (250s/Div) DS9010-05 April 2011 RT9010 Start Up EN Pin Shutdown Response RT9010-28, VIN = 5V IOUT = 50mA (5V/Div) RT9010-28, VIN = 5V IOUT = 50mA V EN (5V/Div) V EN V OUT (1V/Div) V OUT (1V/Div) Time (5s/Div) Time (50s/Div) Power-On Noise RT9010-28 ILOAD = 10mA RT9010-33, No LOAD V = VEN = 4.5V(By battery) 150 IN CIN = COUT = 1uF/X7R 100 Noise (V/Div) VEN (5V/Div) VOUT (2V/Div) POR (5V/Div) 50 0 -50 -100 -150 Time (10s/Div) Time (10ms/Div) Noise 300 RT9010-33, ILOAD = 50mA VIN = VEN = 4.5V(By battery) CIN = COUT = 1uF/X7R Noise (V/Div) 200 100 0 -100 -200 -300 Time (10ms/Div) DS9010-05 April 2011 www.richtek.com 7 RT9010 Applications Information Like any low-dropout regulator, the external capacitors used with the RT9010 must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1F on the RT9010 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 or tantalum 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 RT9010 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 > 20m on the RT9010 output ensures stability. The RT9010 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 RT9010 and returned to a clean analog ground. Region of Stable COUT ESR vs. Load Current Region ESR () () OUT ESR RegionofofStable StableCCOUT 100 RT9010-28, VIN = 5V CIN = 1uF/X7R 10 Unstable Region Thermal Considerations Thermal protection limits power dissipation in RT9010. 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 40C. RT9010 lowers its OTP trip level from 170C to 110C when output short circuit occurs (VOUT < 0.4V) as shown in Figure 2. It limits IC case temperature under 100C and provides maximum safety to customer while output short circuit occurring. VOUT Short to GND 0.4V VOUT IOUT TSD 170 C 110 C OTP Trip Point 110 C IC Temperature 80 C Figure 2. Short Circuit Thermal Folded Back Protection when Output Short Circuit Occurs (Patent) 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 1 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 : Stable Region 0.1 0.01 Simulation Verify Unstable Region 0.001 0 50 100 150 200 Load Current (mA) Figure 1. Stable Cout ESR Range www.richtek.com 8 250 300 PD(MAX) = ( TJ(MAX) - TA ) /JA Where T J(MAX) is the maximum operation junction temperature 125C, TA is the ambient temperature and the JA is the junction to ambient thermal resistance. DS9010-05 April 2011 RT9010 For recommended operating conditions specification of RT9010, where T J(MAX) is the maximum junction temperature of the die (125C) and TA is the operated ambient temperature. The junction to ambient thermal resistance (JA is layout dependent) for TSOT-23-6 package is 220C/W on the standard JEDEC 51-3 single-layer thermal test board. The maximum power dissipation at TA = 25C can be calculated by following formula : PD(MAX) = ( 125C - 25C) / (220C/W) = 0.455 W for TSOT-23-6 packages The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance JA. For RT9010 packages, the Figure 3 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. 0.50 Power Dissipation (W) 0.45 0.40 0.35 TSOT-23-6 0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 25 50 75 100 125 Ambient Temperature (C) Figure 3. Derating Curves for RT9010 Packages DS9010-05 April 2011 www.richtek.com 9 RT9010 Outline Dimension H D L C B b A A1 e Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 0.700 1.000 0.028 0.039 A1 0.000 0.100 0.000 0.004 B 1.397 1.803 0.055 0.071 b 0.300 0.559 0.012 0.022 C 2.591 3.000 0.102 0.118 D 2.692 3.099 0.106 0.122 e 0.838 1.041 0.033 0.041 H 0.080 0.254 0.003 0.010 L 0.300 0.610 0.012 0.024 TSOT-23-6 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: 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 DS9010-05 April 2011