® RT9022 High Voltage, Low Quiescent, 60mA LDO Regulator General Description Features The RT9022 is designed for positive CCD bias applications with critical performance and space requirements. The RT9022 performance is optimized for battery-powered systems to deliver low noise and low quiescent current and with soft start function. z The RT9022 also works well with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications and consumes less than 1μA in shutdown mode. The other features include ultra low dropout voltage, high output accuracy, and current limiting protection. The part is available in the SOT-23-6, TSOT-23-6 and SC-70-6 packages. z z z z z z z μA) Low Quiescent Current (Typically 40μ Wide Operating Voltage Ranges : 5V to 20V Ultra-Fast Transient Response Tight Load and Line Regulation Current Limiting Protection Thermal Shutdown Protection Adjustable Soft Start Time RoHS Compliant and 100% Lead (Pb)-Free Applications z z DSC Camcorder Pin Configurations Ordering Information (TOP VIEW) RT9022 Package Type E : SOT-23-6 J6 : TSOT-23-6 U6 : SC-70-6 Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) EN SS FB 6 5 4 2 3 VIN GND VOUT SOT-23-6 / TSOT-23-6 / SC-70-6 Note : Richtek products are : ` ments of IPC/JEDEC J-STD-020. ` Typical Application Circuit RoHS compliant and compatible with the current requireSuitable for use in SnPb or Pb-free soldering processes. 1 VIN VIN 3 6 EN VOUT 1nF RT9022 1µF ON VOUT FB SS GND 2 VOUT = VFB (1+ Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9022-04 March 2012 2.2µF 4 OFF 5 R1 R2 R1 )V R2 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9022 Marking Information RT9022GE RT9022GU6 D9= : Product Code D9=DNN A0=W DNN : Date Code RT9022PE A0= : Product Code W : Date Code RT9022PU6 D9- : Product Code D9-DNN A0-W DNN : Date Code A0- : Product Code W : Date Code Function Block Diagram EN Shutdown and Logic Control VIN VREF + FB MOS Driver Error Amplifier SS Soft Start VOUT Current Limit and Thermal Protection GND Functional Pin Description Pin No. Pin Name Pin Function 1 VIN Power Input Voltage. 2 GND Ground. 3 VOUT Output Voltage. 4 FB Output Voltage Feedback. 5 SS Soft Start and Noise Bypass. 6 EN Chip Enable. (Active High) Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9022-04 March 2012 RT9022 Absolute Maximum Ratings z z z z z z z z (Note 1) Supply Input Voltage, VIN ------------------------------------------------------------------------------------------------Enable Voltage, VEN ------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C SOT-23-6/TSOT-23-6 ------------------------------------------------------------------------------------------------------SC-70-6 ----------------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) SOT-23-6/TSOT-23-6, θJA ------------------------------------------------------------------------------------------------SC-70-6, θJA ----------------------------------------------------------------------------------------------------------------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 21V 18V 300mW 225mW 250°C/W 333°C/W 260°C 150°C −65°C to 150°C 2kV 200V (Note 4) Supply Input Voltage, VIN ------------------------------------------------------------------------------------------------- 5V to 20V Junction Temperature Range --------------------------------------------------------------------------------------------- −40°C to 100°C Ambient Temperature Range --------------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (VIN = VEN = 15V, CIN = 1μF, COUT = 2.2μF, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Input Power Quiescent Current IOUT = 0mA -- 40 80 μA Standby Current EN = GND -- -- 1 μA VFB = VOUT, ILOAD = 1mA -- 1.25 -- V −1 -- 1 % -- 10 -- nA -- 1.5 -- μA VIN = 15V, VOUT = 14V, ROUT = 50Ω 70 80 -- mA Output Reverse Leakage Current VIN = Unconnected, Output set to 5V -- 30 -- μA Dropout Voltage ILOAD = 30mA, VOUT = 14V -- 0.2 0.3 V f = 120Hz, VIN = VOUT + 1V, IOUT = 10mA -- 65 -- dB f = 10kHz, VIN = VOUT + 1V, IOUT = 10mA -- 55 -- dB EN = High to Low, VOUT = 14V -- 20 -- mA Reference Voltage Feedback Voltage Feedback Voltage Tolerance Feedback Input Current VFB = 1.3V Soft-Start Soft-Start Current Output Output Current Limit Power Supply Rejection Rate Discharge Current ILIM Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9022-04 March 2012 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9022 Parameter Symbol Test Conditions Min Typ Max Unit −1 -- 3 μA EN EN Input Current EN = 15V EN High-Level Input Voltage VEN_H 2.4 -- -- V EN Low-Level Input Voltage VEN_L -- -- 0.6 V Thermal Shutdown Temperature -- 135 -- °C Thermal Shutdown Hysteresis -- 10 -- °C Thermal Protection Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and 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 may affect device reliability. Note 2. θJA is measured at TA = 25°C on a low effective thermal conductivity single-layer test board per JEDEC 51-3 Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 is a registered trademark of Richtek Technology Corporation. DS9022-04 March 2012 RT9022 Typical Operating Characteristics Output Voltage vs. Temperature Quiescent Current vs. Temperature 60 VIN = 18V, ILOAD = 0mA Quiescent Current (µA) Output Voltage (V) 16.0 15.5 15.0 14.5 VIN = 5V, VOUT = 1.25V 55 50 45 40 35 14.0 -50 -25 0 25 50 75 -50 100 -25 Temperature (°C) 50 75 100 Dropout Voltage vs. Load Current 400 VIN = 5V 1.28 Dropout Voltage (mV) Feedback Voltage (V) 25 Temperature (°C) Feedback Voltage vs. Temperature 1.30 0 1.26 1.24 1.22 VOUT = 15V TJ = 100°C 300 TJ = 25°C 200 TJ = −40°C 100 0 1.20 -50 -25 0 25 50 75 0 100 10 20 30 40 50 Temperature (°C) Load Current (mA) Line Transient Response Line Transient Response VOUT = 15V, ILOAD = 3mA VOUT = 15V, ILOAD = 20mA VIN 18 (V) VIN 18 (V) VOUT (10mV/Div) VOUT (10mV/Div) 17 17 Time (1ms/Div) Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9022-04 March 2012 60 Time (1ms/Div) is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9022 Load Transient Response Load Transient Response VIN = 18V, VOUT = 15V ILOAD = 3mA to 50mA VIN = 18V, VOUT = 15V ILOAD = 3mA to 20mA I LOAD (20mA/Div) I LOAD (50mA/Div) VOUT (5mV/Div) VOUT (5mV/Div) 20 Time (1ms/Div) Time (1ms/Div) PSRR Power On/Off VIN = VEN = 6.9V to 7V, VOUT = 5V ILOAD = 10mA VIN = 18V, VOUT = 15V, ILOAD = 20mA VEN (10V/Div) PSRR (dB) 0 -20 VOUT (10V/Div) -40 -60 I IN (100mA/Div) -80 0.01 10 0.1 100 1 1000 10 10000 100 100000 1000 1000000 Time (2.5ms/Div) Frequence (kHz) (Hz) Region of Stable COUT ESR vs. Load Current 100.00 VIN = 18V, VOUT = 15V CIN = 1μF/X7R, COUT = 2.2μF/X5R Unstable Region C OUT ESR (Ω) 10.00 1.00 0.10 Stable Region 0.01 0 10 20 30 40 50 60 Load Current (A) Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 is a registered trademark of Richtek Technology Corporation. DS9022-04 March 2012 RT9022 Application Information Enable Thermal Consideration The RT9022 goes into sleep mode when the Enable 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 1μA. The Enable input is a CMOS logic and cannot be left floating. Thermal protection limits power dissipation in the RT9022. When the operating junction temperature exceeds 135°C, the OTP circuit starts the thermal shutdown function and turns the pass element off. The pass element turns on again after the junction temperature cools by 10°C. Output capacitor The RT9022 is specifically designed to use ceramic output capacitors as low as 2.2μF. Ceramic capacitors below 10μF offer significant cost and space saving, along with high frequency noise filtering. The RT9022 doesn't rely on a zero, which is generated by output capacitor ESR. So, the output capacitor ESR is not sensitive and very low ESR is allowed. Input capacitor A 1μF input capacitor or greater located as close as possible to the IC is recommended. Larger input capacitor value with lower ESR provides better power supply noise rejection and line transient response. Larger load current requires larger capacitor value. 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 ⎠ 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 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) is the maximum operation junction temperature 100°C, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating conditions specification of the RT9022, where TJ(MAX) is the maximum junction temperature of the die (100°C) and TA is the maximum ambient temperature. The junction to ambient thermal resistance ( θJA is layout dependent) for T/SOT-23-6 package is 250°C/W, and SC-70-6 package is 333°C/W on standard JEDEC 51-3 thermal test board. The maximum power dissipation at TA = 25°C can be calculated by following formula : Note that when heavy load is measured, Δsupply will cause Δtemperature. And Δtemperature will cause Δoutput voltage. So the temperature effect must be taken into consideration. PD(MAX) = (100°C − 25°C) / 250°C/W = 300mW for T/SOT-23-6 package Current Limit The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θJA. The Figure 1 of de-rating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. The RT9022 contains an independent current limiter, which monitors and controls the pass transistor's gate voltage to limit the output current to 80mA typically. It protects the part even directly short the output to GND. Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9022-04 March 2012 PD(MAX) = (100°C − 25°C) / 333°C/W = 225mW for SC-70-6 package is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9022 400 Single Layer PCB Power Dissipation (mW) 350 300 250 T/SOT-23-6 200 150 SC-70-6 100 50 0 0 10 20 30 40 50 60 70 80 90 100 Ambient Temperature (°C) Figure 1. De-rating Curves Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 is a registered trademark of Richtek Technology Corporation. DS9022-04 March 2012 RT9022 Outline Dimension H D L C B b A A1 e Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 0.889 1.295 0.031 0.051 A1 0.000 0.152 0.000 0.006 B 1.397 1.803 0.055 0.071 b 0.250 0.560 0.010 0.022 C 2.591 2.997 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 SOT-23-6 Surface Mount Package Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS9022-04 March 2012 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9022 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 Copyright © 2012 Richtek Technology Corporation. All rights reserved. www.richtek.com 10 is a registered trademark of Richtek Technology Corporation. DS9022-04 March 2012 RT9022 H D L C B 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-70-6 Surface Mount Package Richtek Technology Corporation 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries. DS9022-04 March 2012 www.richtek.com 11