RT9068-25GSP

® RT9068 60V, 30μ μA IQ, Low Dropout Voltage Linear Regulator General Description Features The RT9068 family are high voltage (60V operation), low quiescent current low dropout linear regulators capable of supplying 50mA of output current with a maximum dropout voltage of 230mV. The low quiescent and shutdown currents (30μA operating and 2μA shutdown) are ideal for use in battery-powered and/or high voltage systems. Ground current is well-controlled in all conditions, including dropout.  The RT9068 family operates with any reasonable output capacitors including 1μF low-ESR ceramic types and features excellent line and load transient responses. Internal protection circuitry includes reverse-battery protection, current limiting, thermal shutdown, and reverse current protection. Output voltage accuracy is ±2% over the entire line and load range. These devices are available in 3 fixed-output versions (2.5V, 3.3V, 5V) as well as a version that supports an adjustable output voltage (1.25V to 60V). All versions come in SOP-8 and MSOP-8 packages with an exposed pad for high power dissipation. The fixed output versions are also available packaged in SOT-223.        Wide Input Voltage Range : 4.5V to 60V μA Low Quiescent Current : 30μ μA Operating and 2μ Shutdown Low Dropout Voltage : 230mV maximum at 50mA Fixed (2.5V, 3.3V, 5V) and adjustable (1.25V to 60V) versions ±2% Output Tolerance Over Line and Load Stable with 1μ μF Output Capacitor (Aluminum, Tantalum or Ceramic) Inherent Reverse-Current Protection (No diode needed) −60V Reverse-Battery Protection Applications     Low Current, High Voltage Regulators Battery Powered Applications Telecom and Datacom Applications Automotive Application Typical Application Circuit VOUT 2.5V/3.3V/5V VIN 4.5V to 60V VIN 4.5V to 60V RT9068 CIN 0.18µF VIN SHDN GND RT9068-25/33/50 COUT 1µF CIN 0.18µF VIN SENSE GND R1 COUT 1µF FB CIN 0.18µF VIN VOUT SENSE SHDN R2 GND RT9068 (Adjustable Up to 25V Output) Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9068-01 April 2014 RT9068 VOUT SHDN VOUT 1.25V to 60V VIN 4.5V to 60V RT9068 VOUT SENSE VOUT 1.25V to 25V CCOMP R1 COUT 1µF FB R2 RT9068 (Adjustable Up to 60V Output) is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9068 Ordering and Marking Information Part No. Output Voltage RT906825GG Package Marking Information SOT-223 RT906825GG MSOP-8 09= RT906825GSP SOP-8 RT906825GSP RT906833GG SOT-223 RT906833GG RT906825GFP RT906833GFP 2.5V 3.3V MSOP-8 RT906850GG SOT-223 RT906850GG MSOP-8 0B= SOP-8 RT906850GSP 5V RT906850GSP RT9068 GSP GND 1 2 3 GND VOUT (TAB) VIN RT9068-25/33/50 0A= SOP-8 RT9068 GFP (TOP VIEW) SOT-223 RT906833GSP RT906850GFP Pin Configurations RT906833GSP MSOP-8 08= SOP-8 RT9068GSP VOUT SENSE NC NC VIN GND GND SHDN 8 2 3 4 GND 7 9 6 5 RT9068-25/33/50 MSOP-8 VOUT SENSE FB NC VIN GND GND SHDN 8 2 3 4 GND 7 9 6 5 Adjustable RT9068 MSOP-8 Note : Richtek 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. VOUT SENSE 2 NC 3 NC 4 GND 8 VIN 7 GND 6 GND 5 SHDN 9 RT9068-25/33/50 SOP-8 8 VOUT SENSE 2 FB 3 NC 4 GND VIN 7 GND 6 GND 5 SHDN 9 RT9068 SOP-8 Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9068-01 April 2014 RT9068 Pin Description Pin No. RT906825/33/50 GSP/GFP RT9068 GSP/GFP RT9068 GG Name Function 1 1 3 VOUT VOUT supplies power to the load. A minimum output capacitor of 1F is required for stable operation. Output Voltage Sense. For applications with VOUT  25V, SENSE can be connected to the output voltage to optimize the control loop compensation. For applications with VOUT > 25V (adjustable versions only), SENSE must be left unconnected. Control loop compensation is optimized by adding a feed-forward capacitor in the feedback resistor divider connected to FB (see Adjustable Output Voltage and Compensation section). 2 2 -- SENSE 3 -- -- NC No Internal Connection. -- 3 -- FB Feedback Input. Connect to the center tap of a resistor divider for setting the output voltage. (Adjustable versions only) 4 -- -- NC No Internal Connection. 5 5 -- SHDN Shutdown Control Input (Active High). Connect SHDN high to disable the output voltage and reduce the IC’s quiescent current to 2A (typical). Connect SHDN low to enable the output. SHDN is a high-voltage input (also able to withstand reverse voltage) and can be connected directly to a high-voltage input. 6, 7, 9* 6, 7, 9* 2 GND Ground. The exposed pad should be soldered to a large PCB and connected to GND for maximum thermal dissipation. 8 8 1 VIN Power Input. Bypass VIN with a 0.18F or larger capacitor with adequate voltage rating. * exposed pad Function Block Diagram VOUT VIN Current Limit Error Amp VOUT VIN Current Limit Error Amp SHDN SHDN OverTemperature Protection SENSE - + + - OverTemperature Protection SENSE FB Reference Reference GND RT9068-25/33/50 (Fixed Output) Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9068-01 April 2014 GND RT9068 (Adjustable Output) is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9068 Operation The RT9068 is a high input-voltage linear regulator specifically designed to minimize external components. The input voltage range is from 4.5V to 60V. The device supplies 50mA of output current with a maximum dropout voltage of 230mV. Its 30μA quiescent and 2μA shutdown currents make it ideal for use in battery-powered applications. Unlike many PNP LDO regulators, ground current does not increase much in dropout conditions. Output Transistor The RT9068 includes a built-in PNP output transistor configured for low dropout voltage. The output transistor blocks reverse current if the output voltage is held higher than the input voltage (such as in battery-backup applications) so no additional output blocking diode is needed. Over-Temperature Protection The over temperature protection function will turn off the PNP output transistor when the internal junction temperature exceeds 150°C (typ.). Once the junction temperature cools down by approximately 20°C, the regulator will automatically resume operation. Reverse-Battery Protection The RT9068 inputs (VIN and SHDN) can withstand reverse voltages as high as −60V. Both the IC and the load are protected, as long as the load impedance is 500Ω or less. In these conditions, the output voltage is guaranteed to be no more negative than −1V with the maximum negative input voltage. In battery-powered applications, no additional protection against battery reversal is typically needed. Error Amplifier Reverse-Output Protection The Error Amplifier compares the output feedback voltage from an internal feedback voltage divider (fixed output versions) or FB (adjustable output versions) to an internal reference voltage and controls the PNP output transistor's base current to maintain output voltage regulation. The RT9068's internal dividers are placed between SENSE and GND and have a divider resistance of about 1MΩ. The RT9068 protects against current flow to the input (VIN) when the output voltage exceeds VIN. This simplifies battery and capacitive “keep-alive” circuits since they need no additional output blocking diode. Current Limit Protection The RT9068 provides a current limit function to prevent damage during output over-load or shorted-circuit conditions. The output current is detected by an internal current-sense transistor. Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 Shutdown Input (8 Pin Versions) The RT9068 SHDN input is an active-high input that turns off the output transistor and reduces the quiescent current to 2μA typical. Connect SHDN to a voltage below 0.6V for normal operation. is a registered trademark of Richtek Technology Corporation. DS9068-01 April 2014 RT9068 Absolute Maximum Ratings               (Note 1) VIN ----------------------------------------------------------------------------------------------------------------------------SHDN -------------------------------------------------------------------------------------------------------------------------VOUT to GND --------------------------------------------------------------------------------------------------------------VOUT to VIN ----------------------------------------------------------------------------------------------------------------SENSE to GND ------------------------------------------------------------------------------------------------------------SENSE to VIN --------------------------------------------------------------------------------------------------------------FB -----------------------------------------------------------------------------------------------------------------------------FB Current ------------------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C SOT-223 ---------------------------------------------------------------------------------------------------------------------MSOP-8 ---------------------------------------------------------------------------------------------------------------------SOP-8 ------------------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) SOT-223, θJA ----------------------------------------------------------------------------------------------------------------SOT-223, θJC ---------------------------------------------------------------------------------------------------------------MSOP-8, θJA ----------------------------------------------------------------------------------------------------------------MSOP-8, θJC ---------------------------------------------------------------------------------------------------------------SOP-8, θJA ------------------------------------------------------------------------------------------------------------------SOP-8, θJC ------------------------------------------------------------------------------------------------------------------Junction Temperature -----------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------Storage Temperature Range --------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM (Human Body Model) ----------------------------------------------------------------------------------------------- Recommended Operating Conditions    −60V to 80V −60V to 80V −60V to 80V −80V to 60V −30V to 30V −80V to 60V −0.3V to 20V −6mA to 6mA 1.25W 2.1W 3.26W 80°C/W 7.4°C/W 47.4°C/W 11.9°C/W 30.6°C/W 3.4°C/W 150°C 260°C −65°C to 150°C 2kV (Note 4) Supply Input Voltage ------------------------------------------------------------------------------------------------------- 4.5V to 60V Junction Temperature Range --------------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range --------------------------------------------------------------------------------------------- −40°C to 85°C Electrical Characteristics (4.5V < VIN < 60V, VSHDN = 0V, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit 4.5 -- 60 V Input Supply Operational VIN VIN 0 < IOUT < 50mA Quiescent Current IQ VIN = 24V, V SHDN = 0V -- 30 40 A Shutdown Current ISHDN VIN = 24V, V SHDN = 2.5V, VOUT = 0 -- 2 10 A Input Reverse Leakage Current IVINr VIN = 60V, VOUT = 0V -- -- 0.1 mA 120 -- 200 mA -- 0.2 -- % Output Voltage and Current Output Current Limit ILIM Line Regulation V LINE 5.5V < VIN < 60V, IOUT = 1mA Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9068-01 April 2014 is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9068 Parameter Symbol Test Conditions Min Typ Max Unit -- 0.7 -- % V VLOAD 0.1mA < IOUT < 50mA VFB 0 < I OUT < 50mA 1.231 1.25 1.269 0 < IOUT < 50mA 2.45 2.5 2.55 0 < IOUT < 50mA 3.24 3.3 3.36 4.9 5 5.1 -- 20 50 nA VIN = 60V, RL = 500 -- -- 1 V IOUT = 1mA -- 15 30 IOUT = 10mA -- 55 70 IOUT = 50mA -- 150 230 Power Supply Rejection Rate PSRR f = 120Hz, IOUT = 50mA -- 65 -- dB Output Noise Voltage VON IOUT = 10mA, f = 10Hz to 100kHz -- 170 -- VRMS Shutdown Output Voltage VOUTSD SHDN = VIN -- -- 100 mV SHDN High Threshold VIH -- 1.6 2.2 V SHDN Low Threshold VIL 0.6 1.2 -- V SHDN Input Bias Current ISHDN SHDN = VIN -- 0.6 1.2 VSHDN = 0V -- -- 0.1 140 150 160 Load Regulation FB Regulation Voltage RT9068 RT9068-25 Output Voltage RT9068-33 VOUT RT9068-50 FB Input Bias Current RT9068 5.4V < VIN < 60V, 0 < IOUT < 50mA IFB Output Voltage with Reverse VROUT Polarity VIN Dropout Voltage VDROP V mV Shutdown A Thermal Protection Thermal Shutdown T SD C 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 high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is measured at the exposed pad of the package. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 is a registered trademark of Richtek Technology Corporation. DS9068-01 April 2014 RT9068 Typical Operating Characteristics (TA = 25°C, CIN = 0.18μF, COUT = 1μF, unless otherwise specified) Quiescent Current vs. Input Voltage Output Voltage vs. Output Current 45 0 Quiescent Current (µA) 40 Output Voltage (%) -0.2 -0.4 -0.6 -0.8 35 30 25 20 15 10 5 VIN = 14V, VOUT = 3.3V 0 -1 0 10 20 30 40 0 50 10 20 30 40 50 60 Input Voltage (V) Output Current (mA) Output Voltage vs. Temperature Quiescent Current vs. Temperature 50 0.5 Quiescent Current (µA) Output Voltage (%) 0.4 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 40 30 20 10 VIN = 12V, IOUT = 1mA VIN = 12V -0.5 0 -50 -25 0 25 50 75 100 -50 125 -25 0 Temperature (°C) 25 50 75 100 125 Temperature (°C) Shutdown Current vs. Temperature PSRR 0 10 PSRR/dB -20 Shutdown Current (µA)1 -10 COUT = 1μF -30 -40 -50 COUT = 10μF -60 8 6 4 2 -70 IOUT = 50mA -80 VIN = 12V 0 10 100 1000 10000 100000 Frequency (Hz) Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9068-01 April 2014 1000000 -50 -25 0 25 50 75 100 125 Temperature (°C) is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9068 Current Limit vs. Input Voltage Output Voltage vs. Input Voltage 200 0.4 0.2 Output Voltage (%) Current Limit (mA) 180 160 140 120 100 IOUT = 0mA 0.0 -0.2 IOUT = 10mA -0.4 -0.6 IOUT = 50mA -0.8 -1.0 80 -1.2 0 10 20 30 40 50 60 0 10 20 Input Voltage (V) 40 50 60 Leakage Current vs. Reverse Voltage Ground Current vs. Output Current 3.5 0.30 3.0 0.25 Leakage Current (mA)1 Ground Current (mA) 30 Input Voltage (V) 2.5 In Dropout 2.0 1.5 2V Headroom 1.0 0.20 0.15 0.10 0.5 0.05 0.0 0.00 SHDN = VIN, VOUT = SENSE = GND 0 10 20 30 40 50 -80 Output Current (mA) -70 -60 -50 -40 -30 -20 -10 0 Reverse Voltage (V) Dropout Voltage vs. Temperature Output Noise vs. Frequency 200 200 180 Output Noise (µV) Dropout Voltage (mV) IOUT = 50mA 160 IOUT = 30mA 120 80 IOUT = 10mA 40 160 140 120 IOUT = 1mA VIN = 12V, IOUT = 10mA 0 100 -50 -25 0 25 50 75 100 Temperature (°C) Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 125 10 100 1000 10000 100000 Frequency (Hz) is a registered trademark of Richtek Technology Corporation. DS9068-01 April 2014 RT9068 Line Transient Response VOUT vs. VIN VIN (10V/Div) VIN (50V/Div) VOUT_ac (100mV/Div) VOUT (2V/Div) IOUT = 20mA IOUT = 50mA VOUT_ac (20mV/Div) Time (1ms/Div) Time (25μs/Div) Load Transient Response Load Transient Response VIN = 14V, VOUT = 3.3V VIN = 14V, VOUT = 3.3V VOUT_ac (50mV/Div) IOUT (20mA/Div) IOUT = 1mA to 50mA to 1mA Time (10μs/Div) IOUT (20mA/Div) IOUT = 1mA to 50mA to 1mA Time (25μs/Div) Load Transient Response VIN = 14V, VOUT = 3.3V VOUT_ac (50mV/Div) IOUT (20mA/Div) IOUT = 10mA to 60mA to 10mA Time (10μs/Div) Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9068-01 April 2014 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9068 Applications Information The RT9068 is a high input-voltage linear regulator specifically designed to minimize external components. The input voltage range is from 4.5V to 60V. The device supplies 50mA of output current with a maximum dropout voltage of 230mV. The fixed output versions are equipped with internal resistive dividers to set the output voltage to 2.5V, 3.3V, or 5V, respectively. The total resistance of the each internal feedback divider is about 1MΩ The internal dividers connect between SENSE and GND, with the midpoint connecting to the input of the error amplifier. These versions are all internally compensated. Adjustable Output Voltage and Compensation RT9068 The adjustable output versions may be set to provide from 1.25V to 60V, using external feedback voltage divider resistors (Figure 1). These included an internal feedforward compensation capacitor, connected between SENSE and FB, which may be used when regulating at output voltages up to 25V. To achieve the correct compensation (together with your external FB divider, use an upper divider resistor (R1) value between 500kΩ and 1MΩ. Calculate R2 according to the following formula : R2 = R1 / (VOUT / 1.25V − 1). For output voltages greater than 25V an external feedforward capacitor (Figure 2) should be used and SENSE should be left unconnected. Choose a lower divider resistor (R2) at least 10kΩ and calculate R1 according to the following formula : R1 = R2 x (VOUT / 1.25V − 1), Then, calculate the compensation capacitor (CCOMP) value according to the following formula : CCOMP = 25μs / R1. RT9068 CIN 0.18µF VIN CIN 0.18µF VIN VOUT SENSE CCOMP R1 COUT 1µF VOUT 1.25V to 60V FB SHDN R2 GND Figure 2. RT9068 Adjustable Output Above 25V Fixed VOUT Applications VIN 4.5V to 60V RT9068 VIN 4.5V to 60V VOUT 1.25V to 25V VOUT SENSE SHDN GND R1 COUT 1µF Remote-Sense Applications Since VOUT and SENSE (and FB) are separate pins, it is possible to connect SENSE to the output voltage remotely at the load (as long as the output voltage is 25V or less). FB can also be connected remotely, with SENSE unconnected if the output exceeds 25V. Remote sensing eliminates output voltage errors due to any resistive voltage drop between VOUT and the load. (Voltage drops in the ground connection cannot be compensated.) Added External NPN for High-Current Applications Higher output currents and/or increased power dissipation are possible using an external NPN output transistor. VOUT drives the base of the transistor and SENSE and/or FB monitors the actual output voltage, as in normal applications. The fixed-output versions (Figure 3) or adjustable-output version (Figure 4) can be used. Figure 3 and Figure 4 have no current limit and should be used with care. If a crude current limit is desired, add the two diodes and resistor shown in Figure 5. The approximate current limit is 0.7V/R3. Any small switching diodes can be used and size R3 for the power dissipated in R3, which is typically 0.7V x 0.7V / R3. RT9068 VIN 4.5V to 60V CIN 0.18µF VIN MJD31C VOUT 100 SHDN SENSE GND COUT 10µF VOUT 2.5V/3.3V/5V FB R2 Figure 3. RT9068-25/33/50 External Transistor Application Figure 1. RT9068 Adjustable Output Up to 25V Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 10 is a registered trademark of Richtek Technology Corporation. DS9068-01 April 2014 RT9068 PD(MAX) = (TJ(MAX) − TA) / θJA RT9068 CIN 0.18µF VOUT VIN 100 CCOMP SENSE SHDN VOUT 1.25V to 60V COUT 10µF R1 FB GND R2 Figure 4. RT9068 External Transistor Application RT9068 VIN 4.5V to 60V CIN 0.18µF VIN MJD31C VOUT 100 SHDN SENSE 1N4148 x 2 R3 COUT 10µF VOUT 2.5V/3.3V/5V GND Figure 5. RT9068 External Transistor Application with Current Limit Component Selection A low-ESR capacitor such as ceramic type must be connected between VIN and GND with short, wide traces to bypass input noise. RT9068 is designed to work with small input capacitor to reduce the cost from high-voltage low-ESR requirement. To guarantee a minimum 0.1μF input capacitance, a ceramic 0.18μF input capacitor with an appropriate voltage rating is recommended. The RT9068 operates with any reasonable output capacitor including low-ESR ceramic types. Low-ESR aluminum and tantalum capacitor may also be used. A minimum of 1μF is recommended and much higher values are also acceptable. Connect the output capacitor between VOUT and GND with short, wide traces to keep the circuit stable. Thermal Considerations For continuous operation, do not exceed absolute maximum junction temperature. The maximum power dissipation depends on the thermal resistance of the IC package, PCB layout, rate of surrounding airflow, and difference between junction and ambient temperature. The maximum power dissipation can be calculated by the following formula : Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9068-01 April 2014 where TJ(MAX) is the maximum junction temperature, TA is the ambient temperature, and θJA is the junction to ambient thermal resistance. For recommended operating condition specifications, the maximum junction temperature is 125°C. The junction to ambient thermal resistance, θJA, is layout dependent. For SOT-223 package, the thermal resistance, θJA, is 80°C/ W on a standard JEDEC 51-7 four-layer thermal test board. For MSOP-8 (Exposed Pad) package, the thermal resistance, θJA, is 47.4°C/W on a standard JEDEC 51-7 four-layer thermal test board. For SOP-8 (Exposed Pad) package, the thermal resistance, θJA, is 30.6°C/W on a standard JEDEC 51-7 four-layer thermal test board. The maximum power dissipation at TA = 25°C can be calculated by the following formulas : P D(MAX) = (125°C − 25°C) / (80°C/W) = 1.25W for SOT-223 package PD(MAX) = (125°C − 25°C) / (47.4°C/W) = 2.1W for MSOP-8 (Exposed Pad) package PD(MAX) = (125°C − 25°C) / (30.6°C/W) = 3.26W for SOP-8 (Exposed Pad) package The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance, θJA. The derating curves in Figure 6 allow the designer to see the effect of rising ambient temperature on the maximum power dissipation. Maximum Power Dissipation (W) 1 VIN 4.5V to 60V 4.0 3.6 Four-Layer PCB SOP-8 (Exposed Pad) 3.2 2.8 2.4 MSOP-8 (Exposed Pad) 2.0 1.6 SOT-223 1.2 0.8 0.4 0.0 0 25 50 75 100 125 Ambient Temperature (°C) Figure 6. Derating Curve of Maximum Power Dissipation is a registered trademark of Richtek Technology Corporation. www.richtek.com 11 RT9068 Layout Consideration GND COUT VOUT VOUT SENSE 2 NC 3 NC 4 GND 8 VIN 7 GND VIN CIN 6 GND GND 5 SHDN 9 GND Figure 7. PCB Layout Guide Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 12 is a registered trademark of Richtek Technology Corporation. DS9068-01 April 2014 RT9068 Outline Dimension Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 1.400 1.800 0.055 0.071 A1 0.020 0.100 0.001 0.004 b 0.600 0.840 0.024 0.033 B 3.300 3.700 0.130 0.146 C 6.700 7.300 0.264 0.287 D 6.300 6.700 0.248 0.264 b1 2.900 3.100 0.114 0.122 e 2.300 0.091 H 0.230 0.350 0.009 0.014 L 1.500 2.000 0.059 0.079 L1 0.800 1.100 0.031 0.043 3-Lead SOT-223 Surface Mount Package Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS9068-01 April 2014 is a registered trademark of Richtek Technology Corporation. www.richtek.com 13 RT9068 D L EXPOSED THERMAL PAD (Bottom of Package) U E V E1 e A2 A A1 b Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 0.810 1.100 0.032 0.043 A1 0.000 0.150 0.000 0.006 A2 0.750 0.950 0.030 0.037 b 0.220 0.380 0.009 0.015 D 2.900 3.100 0.114 0.122 e 0.650 0.026 E 4.800 5.000 0.189 0.197 E1 2.900 3.100 0.114 0.122 L 0.400 0.800 0.016 0.031 U 1.300 1.700 0.051 0.067 V 1.500 1.900 0.059 0.075 8-Lead MSOP (Exposed Pad) Plastic Package Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 14 is a registered trademark of Richtek Technology Corporation. DS9068-01 April 2014 RT9068 H A M EXPOSED THERMAL PAD (Bottom of Package) Y J X B F C I D Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 4.801 5.004 0.189 0.197 B 3.810 4.000 0.150 0.157 C 1.346 1.753 0.053 0.069 D 0.330 0.510 0.013 0.020 F 1.194 1.346 0.047 0.053 H 0.170 0.254 0.007 0.010 I 0.000 0.152 0.000 0.006 J 5.791 6.200 0.228 0.244 M 0.406 1.270 0.016 0.050 X 2.000 2.300 0.079 0.091 Y 2.000 2.300 0.079 0.091 X 2.100 2.500 0.083 0.098 Y 3.000 3.500 0.118 0.138 Option 1 Option 2 8-Lead SOP (Exposed Pad) Plastic Package Richtek Technology Corporation 14F, No. 8, Tai Yuen 1st 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. DS9068-01 April 2014 www.richtek.com 15