RT9010-2HPJ6

RT9010 300mA LDO Regulator with POR General Description 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. 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. RT9010 is short circuit thermal folded back protected. RT9010 lowers its OTP trip point from 165°C to 110°C 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. Features Wide Operating Voltage Ranges : 2.5V to 5.5V 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 Applications CDMA/GSM Cellular Handsets Battery-Powered Equipment Laptop, Palmtops, Notebook Computers Hand-Held Instruments PCMCIA Cards Portable Information Appliances Ordering Information RT9010Package Type J6 : TSOT-23-6 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) Output Voltage 12 : 1.20V 13 : 1.30V : : 35 : 3.50V 36 : 3.60V 1H : 1.85V 2F : 2.65V 2H : 2.85V Pin Configurations (TOP VIEW) VIN 6 1 EN 5 2 SET 4 3 VOUT GND POR TSOT-23-6 Note : There is no pin1 indicator on top mark for TSOT-23-6 type, and pin 1 will be lower left pin when reading top mark from left to right. Note : RichTek Pb-free and Green products are : RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. 100% matte tin (Sn) plating. Marking Information For marking information, contact our sales representative directly or through a RichTek distributor located in your area, otherwise visit our website for detail. www.richtek.com 1 DS9010-03 August 2007 RT9010 Typical Application Circuit 100K 6 1uF Chip Enable VIN VIN RT9010 POR 3 POR 5 4 VOUT EN SET GND 1 1uF 2 VOUT CDELAY Functional Pin Description Pin No. 1 2 3 4 5 6 Pin Name VOUT GND POR SET EN VIN Output Voltage. Common Ground. Power-On Reset Output : Open-drain output. Active low indicates an output under voltage condition on regulator. Delay Set Input. Connect external capacitor to GND to set the internal delay. Chip Enable (Active High). Supply Input Voltage. Pin Function Function Block Diagram EN 0.2uA Shutdown and Logic Control VIN VREF - + MOS Driver VOUT Current Limit and Thermal Protection GND POR & Delay Error Amplifier SET www.richtek.com 2 DS9010-03 August 2007 RT9010 Absolute Maximum Ratings (Note 1) −0.3V to 6V −0.3V to 6V 0.455W 220°C/W 260°C 150°C −65°C to 150°C 2kV 200V Supply Input Voltage -----------------------------------------------------------------------------------------------------Other I/O Pin Voltages --------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C TSOT-23-6 ------------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 4) TSOT-23-6, θJA ------------------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 2) HBM (Human Body Mode) ---------------------------------------------------------------------------------------------MM (Machine Mode) ------------------------------------------------------------------------------------------------------ Recommended Operating Conditions (Note 3) Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.5V to 5.5V Enable Input Voltage ------------------------------------------------------------------------------------------------------ 0V to 5.5V Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VIN = VOUT + 1V, VEN = VIN, CIN = COUT = 1μF, TA = 25°C, unless otherwise specified.) Parameter Input Voltage Dropout Voltage (Note 5) Symbol VIN VDROP VOUT ΔVOUT ΔVLINE Test Conditions VIN = 2.5V to 5.5V IOUT = 150mA, VOUT > 2.8V IOUT = 300mA, VOUT > 2.8V IOUT = 1mA VIN = (VOUT + 0.3V) to 5.5V or VIN > 2.5V, whichever is larger Min 2.5 --1.2 −2 --330 --1.5 ----- Typ -120 240 ----450 58 ---100 170 40 Max 5.5 --3.6 +2 0.2 0.6 700 80 1 -0.4 ---- Units V mV mV V % %/V % mA μA μA V ppm/°C °C °C Output Voltage Range Output Voltage Accuracy Line Regulation Load Regulation Current Limit Quiescent Current Shutdown Current EN Threshold Voltage Output Voltage TC Thermal Shutdown Thermal Shutdown Hysteresis Logic-Low ΔVLOAD 1mA < IOUT < 300mA ILIM IQ IQ_SD Logic-High VIH VIL TSD ΔTSD RLOAD = 1Ω VEN > 1.5V VEN < 0.4V VIN = 2.5V to 5.5V, Power On VIN = 2.5V to 5.5V, Shutdown To be continued DS9010-03 August 2007 www.richtek.com 3 RT9010 Parameter PSRR Loading=10mA Symbol PSRR Test Conditions f =100Hz f =1kHz f =10kHz f =100Hz PSRR Loading=150mA PSRR f =1kHz f =10kHz VTHL Reset Threshold VTHH POR Output Logic Low Voltage POR Leakage Current Set pin current source Set pin threshold High Threshold, % of nominal VOUT (Flag Off) --−1 0.60 --0.02 0.01 1.25 1.4 96 0.1 1 1.70 -% V μA μA V Low Threshold, % of nominal VOUT (Flag On) Min ------90 Typ −65 −60 −50 −65 −50 −50 -Max -------Units dB dB dB dB dB dB % VPOR_L IL = 250μA IPOR Flag off VSET = 0 POR = high 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. Devices are ESD sensitive. Handling precaution recommended. Note 3. The device is not guaranteed to function outside its operating conditions. Note 4. 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 5. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV. www.richtek.com 4 DS9010-03 August 2007 RT9010 Typical Operating Characteristics Output Voltage vs. Temperature 1.9 Output Voltage vs. Temperature 3.4 RT9010-18 RT9010-33 Output Voltage (V) Output Voltage (V) 1.85 3.35 1.8 3.3 1.75 3.25 1.7 -50 -25 0 25 50 75 100 125 3.2 -50 -25 0 25 50 75 100 125 Temperature (°C) Temperature (°C) Quiescent Current vs. Temperature 70 Dropout Voltage vs. Load Current 350 300 Quiescent Current (uA) 65 Dropout Voltage (mV) RT9010-33 VIN = VEN = 4.3V CIN = COUT 1uF/X7R RT9010-33 TJ = 125°C TJ = 25°C 250 200 150 100 50 60 TJ = -40°C 55 50 -50 -25 0 25 50 75 100 125 0 0 50 100 150 200 250 300 Temperature (°C) Load Current (mA) 20 PSRR RT9010-15 VIN = 4.3V ± 0.1V CIN = COUT 1uF/X7R ILOAD = 100mA ILOAD = 50mA 10000 1000 100 10 1 0.1 POR Delay RT9010-28 0 PSRR (dB) -20 -40 ILOAD = 10mA -60 POR Delay Time (ms) -80 0.01 10 0.1 100 1 1000 10k 10000 100k 100000 1000k 1000000 0.01 0.0001 0.0001 0.0010 0.001 0.0100 0.01 0.1000 0.1 1.0000 1 Frequency (Hz) (Hz) POR Setting Capacitance (uF) DS9010-03 August 2007 www.richtek.com 5 RT9010 Line Transient Response RT9010-28, Both ILOAD = 1mA VIN = 3.8V to 4.8V 4.8 4.8 Line Transient Response RT9010-28, Both ILOAD = 10mA VIN = 3.8V to 4.8V VIN (V) 3.8 VIN (V) 3.8 VOUT (10mV/Div) VOUT (10mV/Div) Time (100μs/Div) Time (100μs/Div) Line Transient Response RT9010-28, Both ILOAD = 50mA VIN = 3.8V to 4.8V 4.8 4.8 Line Transient Response RT9010-28, Both ILOAD = 100mA VIN = 3.8V to 4.8V VIN (V) 3.8 VIN (V) 3.8 VOUT (10mV/Div) VOUT (10mV/Div) Time (100μs/Div) Time (100μs/Div) Load Transient Response RT9010-33, ILOAD = 10mA to 50mA VIN = VEN = 4.3V CIN = COUT = 1uF/X7R Load Transient Response RT9010-33, ILOAD = 10mA to 100mA VIN = VEN = 4.3V CIN = COUT = 1uF/X7R IOUT (50mA/Div) IOUT (100mA/Div) VOUT (20mV/Div) VOUT (20mV/Div) Time (250μs/Div) Time (250μs/Div) www.richtek.com 6 DS9010-03 August 2007 RT9010 Start Up RT9010-28, VIN = 5V IOUT = 50mA EN Pin Shutdown Response RT9010-28, VIN = 5V IOUT = 50mA (5V/Div) V EN (5V/Div) V EN V OUT (1V/Div) V OUT (1V/Div) Time (5μs/Div) Time (50μs/Div) Power-On RT9010-28 ILOAD = 10mA 150 100 Noise RT9010-33, No LOAD VIN = VEN = 4.5V(By battery) CIN = COUT = 1uF/X7R Noise (μV/Div) VEN (5V/Div) VOUT (2V/Div) POR (5V/Div) 50 0 -50 -100 -150 Time (10μs/Div) Time (10ms/Div) Noise 300 200 RT9010-33, ILOAD = 50mA VIN = VEN = 4.5V(By battery) CIN = COUT = 1uF/X7R Noise (μV/Div) 100 0 -100 -200 -300 Time (10ms/Div) DS9010-03 August 2007 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 > 1 μ F 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 1μF with ESR is > 20mΩ 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. Thermal Considerations Thermal protection limits power dissipation in RT9010. 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 40°C. RT9010 lowers its OTP trip level from 170°C to 110°C when output short circuit occurs (VOUT < 0.4V) as shown in Figure 2. It limits IC case temperature under 100°C 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 Region of Stable COUT ESR vs. Load Current 100 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 125°C. The power dissipation definition in device is : PD = (VIN − VOUT) x IOUT + VIN x IQ Region of Stable C OUT ESR ((Ω)) Region of Stable C OUT ESR Ω RT9010-28, VIN = 5V CIN = 1uF/X7R Unstable Region 10 1 0.1 Stable Region 0.01 Simulation Verify Unstable Region 0.001 0 50 100 150 200 250 300 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) i s the maximum operation junction temperature 125°C, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. DS9010-03 August 2007 Load Current (mA) Figure 1. Stable Cout ESR Range www.richtek.com 8 RT9010 For recommended operating conditions specification of RT9010, where T J(MAX) i s the maximum junction temperature of the die (125°C) and TA is the operated ambient temperature. The junction to ambient thermal resistance (θJA is layout dependent) for TSOT-23-6 package is 220°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) / (220°C/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 θJA. 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 0.45 Power Dissipation (W) 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 0 25 50 75 100 125 TSOT-23-6 Ambient Temperature (°C) Figure 3. Derating Curves for RT9010 Packages DS9010-03 August 2007 www.richtek.com 9 RT9010 Outline Dimension H D L C B b A A1 e Symbol A A1 B b C D e H L Dimensions In Millimeters Min 0.700 0.000 1.397 0.300 2.591 2.692 0.838 0.080 0.300 Max 1.000 0.100 1.803 0.559 3.000 3.099 1.041 0.254 0.610 Dimensions In Inches Min 0.028 0.000 0.055 0.012 0.102 0.106 0.033 0.003 0.012 Max 0.039 0.004 0.071 0.022 0.118 0.122 0.041 0.010 0.024 TSOT-23-6 Surface Mount Package Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Richtek Technology Corporation Taipei Office (Marketing) 8F, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek.com www.richtek.com 10 DS9010-03 August 2007