RT9206GS Richtek USA Inc, RT9206GS Datasheet
RT9206GS
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RT9206GS Summary of contents
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High Efficiency, Synchronous Buck with Dual Linear Controllers General Description The RT9206 is a low cost, combo power controller, which integrates a synchronous step-down voltage-mode PWM and two HV linear controllers. Directly drive external N-MOSFET makes it easy to implement ...
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RT9206 Typical Application Circuit V OUT1 Q3 V OUT2 3. OUT3 10µF 2.5V C7 R11 10µF 5.6k C14 33nF R12 4. OUT1 V OUT2 3. OUT3 10µF 2.5V C7 R11 10µF 5.6k ...
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Function Block Diagram LFB1 LFB2 VDD COMP FB SS/EN PGOOD DS9206-12 April 2008 LCTR2 0. 6.0V Reg + PWM CP - ...
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RT9206 Operation Introduction The RT9206 is a combo controller, which integrates an adjustable frequency, voltage mode synchronous step down controller and two HV linear controllers. The synchronous step down controller consists of an internal precision reference, an internal oscillator, an ...
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Pin Description LDRV1(Pin 1) Linear controller 1 (LCTR1) driver. Connect to the gate of external N-Channel MOSFET pass transistor to form a positive linear regulator VDD (Pin 2) Input supply voltage LDRV2 (Pin 3) Linear controller 2 (LCTR2) driver. Connect ...
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RT9206 Absolute Maximum Ratings ) -------------------------------------------------------------------------------------------------- −0.3 to 30V Supply Voltage (V IN PHS ---------------------------------------------------------------------------------------------------------------------- −0.6V to 30V PHS (PHS Transient Time Interval < 50ns) ---------------------------------------------------------------------- −5V BOOT PHS ----------------------------------------------------------------------------------------------------- −0. BOOT to GND ---------------------------------------------------------------------------------------------------------- −0.3V ...
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Parameter PWM Section Reference Voltage Feedback Voltage Internal Voltage Internal Voltage Source Current PWM Section Oscillator Free Run Frequency Operation Frequency Setting Ramp Amplitude Maximum Duty Cycle Error Amplifier GM Compensation Source Current Compensation Sink Current Gate Driver Upper Gate ...
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RT9206 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 ...
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Typical Operating Characteristics Power OUT1 I = 0.5A OUT2 I = 0.5A OUT3 5V/Div V IN 2V/Div V OUT1 2V/Div V OUT3 2V/Div V OUT2 5V/Div PGOOD V = 12V 200kHz IN Time (100ms/Div) ...
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RT9206 Dead Time LGATE 2V/Div UGATE 5V/Div V = 12V OUT1 Time (20ns/Div) Dead Time UGATE 5V/Div LGATE 2V/Div V = 12V OUT1 Time (20ns/Div) Dynamic Loading UGATE 10V/Div LGATE 5V/Div V ...
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Short Latch UGATE V OUT1 I L Time (20μs/Div) Oscillator Frequency vs. Temperature 240 V = 12V IN 235 RT = floating 230 225 220 215 210 205 200 195 190 -50 - Temperature (°C) POR(Rising/Falling) vs. Temperature ...
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RT9206 Fosc vs. R 800 700 600 500 400 300 200 100 Over Current Threshold vs. Temperature 450 400 350 300 250 200 ...
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Application Information Synchronous Buck Converter The RT9206 is specifically designed for synchronous buck converter with wide input voltage from 4.75V to operating frequency from 200kHz to 600kHz. To fully utilize its advantages, peripheral components should be appropriately selected. The following ...
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RT9206 OUT 1 Figure 2. The related waveforms of output capacitor. The AC impedance of output capacitor at ...
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The MOSFET should be capable of handling the power loss over the entire operating range. Design Example: Design the power stage for a synchronous step-down converter having the following specifications: = 5A, Δ 12V 5V, I ...
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RT9206 PGOOD Figure 4. The soft-stat timing diagram of RT9206 For the example 1μ 57ms 133ms and Shutdown The power stage can be ...
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Compensator Cc2 PWM Generator Figure 5. The simplified diagram for synchronous Buck converter and control loop. From control system point of view, ...
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RT9206 The Effective Series Resistance (ESR) of capacitor and capacitance introduces one zero into system, the zero is given (Hz the voltage-mode Buck converter shown in Figure 5, ...
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The design procedure as following : (1). Selecting the zero crossover frequency f 1/20 switching frequency. Then according equation (24) set the resistor R to determine the zero crossover C1 frequency OUT ...
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RT9206 Linear Regulator Output Capacitor Selection Solid tantalum capacitors are recommended for use on the output capacitors of LDO because their typical ESR is very close to the ideal value required for loop compensation. Tantalums also have good temperature stability: ...
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Outline Dimension J I Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Information that is provided by Richtek Technology Corporation ...