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RT9078-25GJ5

RT9078-25GJ5

  • 厂商:

    RICHTEK(台湾立锜)

  • 封装:

    SOT23-5

  • 描述:

    IC REG LIN 2.5V 300MA TSOT23-5

  • 数据手册
  • 价格&库存
RT9078-25GJ5 数据手册
® RT9078 2μ μA IQ, 300mA Low-Dropout Linear Regulator General Description Features The RT9078 is a low-dropout (LDO) voltage regulator with enable function that operates from a 1.2V to 5.5V supply. It provides up to 300mA of output current in miniaturized packaging.  The feature of 2μA low quiescent current and 0.5μA shutdown current are ideal for the battery application with long service life. The other features include current limit function, over temperature protection and output discharge function. Pin Configuration         (TOP VIEW) VOUT SNS/NC 5 4 2    PSRR = 75dB at 1kHz Adjustable Output Voltage Range :  0.8V to 5V (TSOT-23-5 Package with SNS Pin Only) ±2% Output Accuracy Low (0.1μ μA) Shutdown Current Dropout Voltage : 0.15V at 300mA when VOUT ≥ 3V Support Fixed Output Voltage 0.8V, 1.0V, 1.05V, 1.1V, 1.2V, 1.25V, 1.3V, 1.5V, 1.8V, 1.85V, 2V, 2.5V, 2.8V, 2.85V, 3V, 3.1V, 3.3V, 3.45V Current Limit Protection Over Temperature Protection Output Active Discharge Function TSOT-23-5 and ZQFN-4L 1x1 (ZDFN-4L 1x1) Packages Available 3 VIN GND EN Applications TSOT-23-5   VOUT Input Voltage Range : 1.2V to 5.5V 2μ μA Ground Current (IQ) at no Load 1 4 VIN 3 EN  Portable, Battery Powered Equipment Ultra Low Power Microcontrollers Notebook Computers SGND GND 2 5 ZQFN-4L 1x1 (ZDFN-4L 1x1) Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9078-16 June 2019 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT9078 Ordering Information RT9078/NPin 1 Orientation*** (2) : Quadrant 2, Follow EIA-481-D Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Package Type J5 : TSOT-23-5 QZ : ZQFN-4L 1x1 (Z-Type) (ZDFN-4L 1x1) Lead Plating System G : Green (Halogen Free and Pb Free) Output Voltage 08 : 0.8V : 20 : 2.0V : 33 : 3.3V 1B : 1.25V 1H : 1.85V 2H : 2.85V 1K : 1.05V 3D : 3.45V (ZQFN-4L 1x1 only) Special Request : Any voltage between 0.8V and 3.3V under specific business agreement Pin Function RT9078 : Without SNS Pin RT9078N : With SNS Pin** Note : ***Empty means Pin1 orientation is Quadrant 1 **Available for output target adjustment (Ex : RT9078N-08GJ5 with 0.8V reference level for output target adjustment) 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. Copyright © 2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS9078-16 June 2019 RT9078 Functional Pin Description Pin No. TSOT-23-5 ZQFN-4L 1x1 (ZDFN-4L 1x1) Pin Name Pin Function 1 4 VIN Regulator input pin. Input capacitor should be placed directly at this pin. 2 2 GND Ground. 3 3 EN Chip enable pin. Pulling this pin below 0.4V turns the regulator off, reducing the quiescent current to a fraction of its operating value. 4 -- SNS Output voltage sense. (RT9078N only) NC No internal connection. 5 1 VOUT Regulator output pin. Output capacitor should be placed directly at this pin. -- 5 (Exposed Pad) SGND Substrate of chip. Tie to GND plane for maximum thermal dissipation. Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9078-16 June 2019 is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT9078 Functional Block Diagram VIN (without sense function) Current/Thermal Sense GND SNS (with sense function) + - EN Bandgap Reference VOUT R1 EN R2 Operation Basic Operation Current-Limit Protection The RT9078 is a low quiescent current linear regulator designed especially for low external components system. The input voltage range is from 1.2V to 5.5V. The RT9078 contains an independent current limiter, which monitors and controls the pass transistor's gate voltage, limiting the output current to 0.6A (typ.). The current limiting level is reduced to around 0.3A named fold-back current limit when the output voltage is further decreased. The output can be shorted to ground indefinitely without damaging the part. The minimum required output capacitance for stable operation is 1μF capacitance after consideration of the temperature and voltage coefficient of the capacitor. Pass Transistor The RT9078 builds in a P-MOSFET pass transistor which provides a low switch-on resistance for low dropout voltage applications. Error Amplifier The Error Amplifier compares the internal reference voltage with the output feedback voltage from the internal divider, and controls the gate voltage of P-MOSFET. Chip Enable and Shutdown The RT9078 provides an EN pin, as an external chip enable control, to enable or disable the device. The VEN below 0.4V turns the regulator off and enters the shutdown mode, while VEN above 0.9V turns the regulator on. When the regulator is shutdown, the ground current is reduced to a maximum of 0.5μA. Copyright © 2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 Over-Temperature Protection The over-temperature protection function will turn off the P-MOSFET when the junction temperature exceeds 150°C (typ.), and the output current exceeds 80mA. Once the junction temperature cools down by approximately 20°C, the regulator will automatically resume operation. Output Active Discharge When the RT9078 is operating at shutdown mode, the device has an internal active pull down circuit that connects the output to GND through a resistor for output discharging purpose. is a registered trademark of Richtek Technology Corporation. DS9078-16 June 2019 RT9078 Absolute Maximum Ratings         (Note 1) VIN, VOUT, SNS, EN to GND ------------------------------------------------------------------------------------------VOUT to VIN ---------------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C TSOT-23-5 ------------------------------------------------------------------------------------------------------------------ZQFN-4L 1x1 (ZDFN-4L 1x1) -------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) TSOT-23-5, θJA ------------------------------------------------------------------------------------------------------------TSOT-23-5, θJC ------------------------------------------------------------------------------------------------------------ZQFN-4L 1x1 (ZDFN-4L 1x1), θJA -------------------------------------------------------------------------------------ZQFN-4L 1x1 (ZDFN-4L 1x1), θJC ------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM (Human Body Model) ---------------------------------------------------------------------------------------------- Recommended Operating Conditions   −0.3V to 6.5V −6.5V to 0.3V 0.43W 0.44W 230.6°C/W 21.8°C/W 226°C/W 43°C/W 260°C 150°C −65°C to 150°C 2kV (Note 4) Input Voltage, VIN --------------------------------------------------------------------------------------------------------- 1.2V to 5.5V Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C Electrical Characteristics (VOUT + 1 < VIN < 5.5V, TA = 25°C, unless otherwise specified) Parameter Fixed Output Voltage Range Symbol Min Typ Max Unit 0.8 -- 3.45 V ILOAD = 1mA 2 -- 2 % ILOAD = 1mA 0.784 0.8 0.816 V 0.8V  VOUT  1.05V -- 0.7 0.97 1.05V  VOUT  1.2V -- 0.5 0.92 1.2V  VOUT  1.5V -- 0.4 0.57 1.5V  VOUT  1.8V -- 0.3 0.47 1.8V  VOUT  2.1V -- 0.24 0.33 2.1V  VOUT  2.5V -- 0.21 0.3 2.5V  VOUT  2.8V -- 0.18 0.25 2.8V  VOUT  3V -- 0.16 0.23 3V  VOUT -- 0.15 0.2 VDROP 1.8V  VOUT  2.1V -- 0.16 0.2 V IQ ILOAD = 0mA, VOUT  5.5V VIN  VOUT + VDROP -- 2 4 A VOUT DC Output Accuracy SNS Reference Voltage (for RT9078N-08GJ5 only) Dropout Voltage (ILOAD = 300mA) Dropout Voltage (ILOAD = 200mA) (Note 5) (Note 6) VCC Consumption Current Test Conditions VREF VDROP Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9078-16 June 2019 V is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT9078 Parameter Symbol Test Conditions Min Typ Max Unit Shutdown GND Current (Note 7) VEN = 0V -- 0.1 0.5 A Shutdown Leakage Current (Note 7) VEN = 0V, VOUT = 0V -- 0.1 0.5 A VEN = 5.5V -- -- 0.1 A 1.2V  VIN  1.5V -- 0.3 0.6 1.5V  VIN  1.8V -- 0.15 0.3 1.8V  VIN  5.5V -- 0.13 0.35 EN Input Current IEN LINE Line Regulation ILOAD = 1mA % Load Regulation LOAD 1mA < ILOAD < 300mA -- 0.5 1 % Power Supply Rejection Ratio PSRR VIN = 3V, ILOAD = 50mA, COUT = 1F, VOUT = 2.5V, f = 1kHz -- 75 -- dB VOUT = 0.8V -- 38 -- VOUT = 1.2V -- 46 -- VOUT = 1.8V -- 48 -- VOUT = 3.3V -- 51 -- COUT = 1F, ILOAD = 150mA, BW = 10Hz to 100kHz, VIN = VOUT + 1V Output Voltage Noise Output Current Limit VRMS ILIM VOUT = 90% of VOUT(NOM) 350 600 -- H-Level VENH VIN = 5V 0.5 0.7 0.9 L-Level VENL VIN = 5V 0.4 0.65 0.85 Thermal Shutdown Temperature TSD ILOAD = 30mA, VIN  1.5V -- 150 -- C Thermal Shutdown Hysteresis TSD -- 20 -- C -- 80 --  Enable Threshold Voltage Discharge Resistance EN = 0V, VOUT = 0.1V mA V Note 1. Stresses beyond those listed under “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 in the natural convection at TA = 25°C on a two-layer Richtek Evaluation Board for ZQFN-4L 1x1 (ZDFN4L1x1) Package. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7 for TSOT-235 Package. 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. The dropout voltage is defined as VIN − VOUT, when VOUT is 98% of the normal value of VOUT. Note 6. For the application under following condition : 1.8V ≤ VOUT < 2.1V, ILOAD = 200mA, TA = 85°C, the maximum dropout voltage is guaranteed by design that not over 0.28V. Note 7. The specification is tested at wafer stage and guaranteed by design after assembly. Copyright © 2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 is a registered trademark of Richtek Technology Corporation. DS9078-16 June 2019 RT9078 Typical Application Circuit RT9078N VIN CIN 1µF EN VIN VOUT VOUT COUT (Capacitance  1µF) SNS EN GND Figure 1. Application with Sense Function RT9078 VIN CIN 1µF EN VIN VOUT VOUT COUT (Capacitance  1µF) EN GND Figure 2. Application without Sense Function RT9078N VIN CIN 1µF VIN VOUT VOUT R1 SNS EN EN COUT (Capacitance  1µF) R2 GND Figure 3. Adjustable Output Voltage Application Circuit Table 1. Recommended External Components Component CIN * COUT Description Vendor P/N 1F, 10V, X5R, 0402 GRM155R61A105KE15 (Murata) 1F, 6.3V, X5R, 0402 GRM153R60J105ME95(Murata) CGB2A3X5R0J105M033BB(TDK) 2.2F, 6.3V, X5R, 0402 GRM153R60J225ME95 (Murata) C1005X5R0J225M050BC (TDK) 4.7F, 6.3V, X5R, 0402 GRM153R60J475ME15 (Murata) C1005X5R0J475K050BE(TDK) *: Considering the effective capacitance derated with biased voltage level, the COUT component needs satisfy the effective capacitance at least 0.7F or above at targeted output level for stable and normal operation. Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9078-16 June 2019 is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT9078 Typical Operating Characteristics Output Voltage vs. Temperature 3.40 0.88 3.38 0.86 3.36 Output Voltage (V) Output Voltage (V) Output Voltage vs. Temperature 0.90 0.84 0.82 0.80 VIN = 1.2V VIN = 2.1V VIN = 5.5V 0.78 0.76 0.74 3.34 3.32 VIN = 3.8V VIN = 4.5V VIN = 5.5V 3.30 3.28 3.26 3.24 0.72 3.22 VOUT = 0.8V, ILOAD = 1mA 0.70 VOUT = 3.3V, ILOAD = 1mA 3.20 -50 -25 0 25 50 75 100 125 -50 -25 Temperature (°C) 50 75 100 125 Output Voltage vs. Load Current 0.88 1.00 0.86 0.95 0.90 0.84 Output Voltage (V) Output Voltage (V) 25 Temperature (°C) Output Voltage vs. Input Voltage 0.82 0.80 0.78 0.76 0.85 0.80 VIN = 3V VIN = 5V 0.75 0.70 0.65 0.60 0.74 0.55 VOUT = 0.8V, ILOAD = 1mA 0.72 ILOAD = 0mA to 300mA 0.50 1.2 1.7 2.2 2.7 3.2 3.7 4.2 4.7 5.2 5.7 0 50 0.35 100 150 200 Ground Current vs. Load Current 0.35 0.25 0.20 0.15 TA = 85°C TA = 25°C TA = −40°C 0.10 0.05 Ground Current vs. Load Current 0.25 0.20 TA = −40°C TA = 25°C TA = 125°C 0.15 0.10 0.05 VOUT = 3V VOUT = 0.8V 0.01 0.1 1 10 100 Load Current (mA) Copyright © 2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 300 0.30 GND Current (mA) 0.30 0.00 0.001 250 Load Current (mA) Input Voltage (V) GND Current (mA) 0 1000 0.00 0.001 0.01 0.1 1 10 100 1000 Load Current (mA) is a registered trademark of Richtek Technology Corporation. DS9078-16 June 2019 RT9078 Shutdown Leakage Current vs. Temperature Shutdown Current vs. Input Voltage 0.10 VOUT = 0.8V, EN = 0V Shutdown Leakage Current (μA)1 Shutdown Current (μA)1 0.1 0.08 0.06 0.04 0.02 0 VOUT = 0.8V, EN = 0V 0.08 0.06 0.04 VIN = 1.8V VIN = 5.5V 0.02 0.00 1 2 3 4 5 6 -50 -25 0 Input Voltage (V) EN Threshold vs. Input Voltage Enable High EN Threshold (V) EN Threshold (V) 125 Enable High Enable Low 0.5 0.4 0.3 0.2 0.66 0.65 0.64 0.62 0 0.61 2 3 4 5 Enable Low 0.63 0.1 1 VIN = 5.5V -50 6 -25 0 Input Voltage (V) ILOAD = 300mA Current Limit (mA) 0.16 ILOAD = 200mA 0.12 0.10 0.08 ILOAD = 100mA 0.06 0.04 100 125 VOUT = 0.8V VOUT = 3.3V 500 400 300 200 100 ILOAD = 10mA 0.02 75 600 0.18 0.14 50 Current Limit vs. Temperature 700 VOUT = 2.85V 25 Temperature (°C) Dropout Voltage vs. Temperature Dropout Voltage (V) 100 0.67 0.6 VIN = 5V 0.00 0 -50 -25 0 25 50 75 100 Temperature (°C) Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9078-16 75 EN Threshold vs. Temperature 0.7 0.20 50 0.68 0.8 0.22 25 Temperature (°C) June 2019 125 -50 -25 0 25 50 75 100 125 Temperature (°C ) is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT9078 Fold-Back Current Limit vs. Temperature SNS Input Current vs. Temperature 350 0.9 0.8 SNS Input Current (μA) Fold-Back Current Limit (mA) VOUT = 0.8V 300 250 VOUT = 3.3V 200 150 100 50 VIN = 5V 0 0.7 0.6 0.5 0.4 0.3 0.2 0.1 VIN = 5V, VOUT = 0.8V, EN = H 0.0 -50 -25 0 25 50 75 100 125 -50 25 50 75 Temperature (°C) Power On from EN Power Off from EN EN (2V/Div) VOUT (2V/Div) VOUT (2V/Div) VIN = 3.8V, VOUT = 2.8V, ILOAD = 300mA I LOAD (200mA/Div) 100 125 VIN = 3.8V, VOUT = 2.8V, ILOAD = 300mA Time (250μs/Div) Time (500μs/Div) Line Transient Load Transient VIN = 3.8V, VOUT = 1.8V, ILOAD = 1mA to 300mA VIN = 2.8V to 3.8V, VOUT = 1.8V, ILOAD = 1mA I LOAD (0.1A/Div) VIN (1V/Div) VOUT (10mV/Div) VOUT (2mV/Div) Time (250μs/Div) Copyright © 2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 10 0 Temperature (°C ) EN (2V/Div) I LOAD (200mA/Div) -25 Time (100μs/Div) is a registered trademark of Richtek Technology Corporation. DS9078-16 June 2019 RT9078 PSRR vs. Frequency Output Current Limit Protection 0 VOUT (1V/Div) PSRR (dB) -20 IOUT (200mA/Div) ILOAD = 50mA ILOAD = 30mA ILOAD = 15mA ILOAD = 10mA -40 -60 -80 VIN = 5V, VOUT = 3.3V VIN = 3.3V, VOUT = 2.8V, COUT = 1μF -100 Time (500μs/Div) 10 100 1000 10000 100000 1000000 PSRR vs. Frequency 0 PSRR (dB) -20 -40 ILOAD = 150mA ILOAD = 50mA ILOAD = 15mA -60 -80 VIN = 2.8V, VOUT = 0.8V, COUT = 1μF -100 10 100 1000 10000 100000 Frequency (Hz) Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9078-16 June 2019 1000000 Output Spectral Noise Density (μV / Hz) Frequency (Hz) Output Noise vs. Frequency 100 VIN = 3.6V, VOUT = 3.3V, COUT = 1μF, RMS Noise (10Hz to 100kHz) 49μVRMS (IOUT = 150mA) 53μVRMS (IOUT = 10mA) 10 1 IOUT = 10mA IOUT = 150mA 0.1 0.01 0.001 10 100 1K 10K 100K Frequency (Hz) is a registered trademark of Richtek Technology Corporation. www.richtek.com 11 RT9078 Application Information Like any low dropout linear regulator, the RT9078’s external input and output capacitors must be properly selected for stability and performance. Use a 1μF or larger input capacitor and place it close to the IC's VIN and GND pins. Any output capacitor meeting the minimum 1mΩ ESR (Equivalent Series Resistance) and capacitance larger than 1μF requirement may be used. Place the output capacitor close to the IC's VOUT and GND pins. Increasing capacitance and decreasing ESR can improve the circuit's PSRR and line transient response. Dropout Voltage The dropout voltage refers to the voltage difference between the VIN and VOUT pins while operating at specific output current. The dropout voltage VDROP also can be expressed as the voltage drop on the pass-FET at specific output current (IRATED) while the pass-FET is fully operating at ohmic region and the pass-FET can be characterized as an resistance RDS(ON). Thus the dropout voltage can be defined as (VDROP = VIN − VOUT = RDS(ON) x IRATED). For normal operation, the suggested LDO operating range is (VIN > VOUT + VDROP) for good transient response and PSRR ability. Vice versa, while operating at the ohmic region will degrade the performance severely. Adjustable Output Voltage Setting Because of the small input current at the SNS pin, the RT9078N with SNS pin also can work as an adjustable output voltage LDO. Figure 3 gives the connections for the adjustable output voltage application. The resistor divider from VOUT to SNS sets the output voltage when in regulation. The voltage on the SNS pin sets the output voltage and is determined by the values of R1 and R2. The adjustable output voltage can be calculated using the formula given in equation 1 : VOUT  R1 + R2  VSNS (1) R2 The maximum adjustable output voltage can be as high as input voltage deducted by the dropout voltage. The Resistive divider total value of R1 and R2 are suggested not over 50kΩ. 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 : PD(MAX) = (TJ(MAX) − TA) / θJA 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 and TA is the ambient temperature. The junction to ambient thermal resistance, θJA, is layout dependent. For TSOT-23-5 package, the thermal resistance, θJA, is 230.6°C/W on a standard JEDEC 51-7 four-layer thermal test board. For ZQFN-4L 1x1 (ZDFN-4L 1x1) package, the thermal resistance, θJA, is 226°C/W on a two-layer Richtek evaluation board. The maximum power dissipation at TA = 25°C can be calculated by the following formula : PD(MAX) = (125°C − 25°C) / (230.6°C/W) = 0.43W for TSOT-23-5 package PD(MAX) = (125°C − 25°C) / (226°C/W) = 0.44W for ZQFN-4L 1x1 (ZDFN-4L 1x1) package The maximum power dissipation depends on the operating ambient temperature for fixed T J(MAX) and thermal resistance, θJA. The derating curve in Figure 4 allows the designer to see the effect of rising ambient temperature on the maximum power dissipation. where VSNS is determined by the output voltage selections in the ordering information of the RT9078N (Ex : For the RT9078N-08GJ5, VSNS is 0.8V ). Copyright © 2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 12 is a registered trademark of Richtek Technology Corporation. DS9078-16 June 2019 RT9078 Maximum Power Dissipation (W)1 0.6 Four-Layer PCB for TSOT-23-5 package Two-Layer Richtek EVB for ZQFN (ZDFN)-4L 1x1 package 0.5 0.4 0.3 ZQFN-4L 1x1 (ZDFN-4L 1x1) 0.2 TSOT-23-5 0.1 0.0 0 25 50 75 100 125 Ambient Temperature (°C) Figure 4. Derating Curve of Maximum Power Dissipation Layout Considerations For best performance of the RT9078, the PCB layout suggestions below are highly recommend :  Input capacitor must be placed as close as possible to IC to minimize the power loop area.  Minimize the power trace length and avoid using vias for the input and output capacitors connection. Figure 5 and Figure 6 shows the examples for the layout reference which helps the inductive parasitic components minimization, load transient reduction and good circuit stability. Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9078-16 June 2019 is a registered trademark of Richtek Technology Corporation. www.richtek.com 13 RT9078 Ground Power Plane VOUT 1 4 VIN 3 EN SGND GND 5 2 Place input/output capacitors as close as possible to the connecting pins for minimizing power loop area and low impedance connection to GND plate. Connected with enable source by via Figure 5. PCB Layout Guide for ZQFN-4L 1x1 package Place input/output capacitors as close as possible to the connecting pins for minimizing power loop area and low impedance connection to GND plate. Resistive divider is for output voltage adjustment (RT9078N package only). R1 R2 VOUT SNS/NC 5 4 Ground Power Plane 2 3 VIN GND EN Thermal vias help to reduce power trace and Improve thermal dissipation. Enable source Figure 6. PCB Layout Guide for TSOT-23-5 package Copyright © 2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 14 is a registered trademark of Richtek Technology Corporation. DS9078-16 June 2019 RT9078 Outline Dimension Symbol Dimensions In Millimeters Dimensions In Inches 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-23-5 Surface Mount Package Copyright © 2019 Richtek Technology Corporation. All rights reserved. DS9078-16 June 2019 is a registered trademark of Richtek Technology Corporation. www.richtek.com 15 RT9078 1 1 2 2 DETAIL A Pin #1 ID and Tie Bar Mark Options Note : The configuration of the Pin #1 identifier is optional, but must be located within the zone indicated. Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.300 0.400 0.012 0.016 A1 0.000 0.050 0.000 0.002 A3 0.117 0.162 0.005 0.006 b 0.175 0.275 0.007 0.011 D 0.900 1.100 0.035 0.043 D2 0.450 0.550 0.018 0.022 E 0.900 1.100 0.035 0.043 E2 0.450 0.550 0.018 0.022 e L 0.625 0.200 0.025 0.300 0.008 0.012 H 0.039 0.002 H1 0.064 0.003 Z-Type 4L QFN 1x1 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. 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. www.richtek.com 16 DS9078-16 June 2019
RT9078-25GJ5 价格&库存

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RT9078-25GJ5
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  • 1+0.55110
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库存:31