RT9259AGS Richtek USA Inc, RT9259AGS Datasheet
RT9259AGS
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RT9259AGS Summary of contents
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Synchronous Buck PWM DC/DC and Linear Power Controller General Description The RT9259A is a dual-channel DC/DC controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a synchronous buck controller and ...
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RT9259A Typical Application Circuit www.richtek.com 2 RT9259A 1 BOOT 14 UGATE 8 VCC12 DRV PHASE 6 11 FBL LGATE 2 12 RT_DIS PGND 7 GND VREF COMP 10 OCSET R OCSET C IN ...
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Functional Pin Description BOOT (Pin 1) Bootstrap supply for the upper gate driver. Connect the bootstrap capacitor between BOOT pin and the PHASE pin. The bootstrap capacitor provides the charge to turn on the upper MOSFET. RT_DIS (Pin 2) Connect ...
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RT9259A Function Block Diagram Reference 0.8V REF_OUT VREF V REF1 FBL VCC12 - + DRV + Inhibit Shutdown RT_DIS Oscillator GND www.richtek.com 4 Voltage Bias 0. REF2 SSE + + + COMP ...
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Absolute Maximum Ratings Supply Voltage, V -------------------------------------------------------------------------------------- 15V CC PHASE to GND DC ------------------------------------------------------------------------------------------------------------- < 200ns ------------------------------------------------------------------------------------------------------ BOOT to PHASE ------------------------------------------------------------------------------------------ 15V BOOT to GND DC ------------------------------------------------------------------------------------------------------------- < 200ns ------------------------------------------------------------------------------------------------------ UGATE ------------------------------------------------------------------------------------------------------- V LGATE ------------------------------------------------------------------------------------------------------- GND − 0. ...
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RT9259A Parameter Reference Voltage PWM Error Amplifier Reference Linear Driver Reference V Buffer Source Current REF Error Amplifier DC Gain Gain-Bandwidth Product Slew Rate Gate Driver Upper Drive Source Upper Drive Sink Lower Drive Source Lower Drive Sink Protection Under ...
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Typical Operating Characteristics Dead Time No Load, Falling V IN1 (5V/Div) Time (25ns/Div) V OUT1 (2V/Div (10A/Div) Time (2.5ms/Div) Shut Down Full Load (20V/Div) (10V/Div) (500mV/Div) (1V/Div) Time (5μs/Div) DS9259A-02 March 2007 UGATE PHASE (5V/Div) LGATE OCP (10V/Div) ...
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RT9259A Start Up I LOAD (2.5A/Div) V OUT1 (500mV/Div) Time (1ms/Div) Transient Response UGATE (20V/Div) (100mV/Div) V OUT1 I L (10A/Div) Time (2.5μs/Div) Transient Response LDO (2mV/Div) V OUT2 I L (0.5A/Div) Time (100μs/Div) www.richtek.com 8 No Load (500mV/Div) (500mV/Div) ...
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Application Information Introduction The RT9259A is a dual-channel DC/DC controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a synchronous buck controller and an LDO controller. The synchronous buck controller integrates ...
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RT9259A Soft Start for Synchronous Buck Converter A built-in soft-start is used to prevent surge current from power supply input during power on (referring to the Functional Block Diagram). The error amplifier three- input device. SSE or ...
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If MOSFET with R = 16mΩ is used, the OCP DS(ON) threshold current is about 25A. Once OCP is triggered, the RT9259A enters hiccup mode and re-soft starts again. The RT9259A shuts down after 4 time OCP hiccups. Inductor Current ...
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RT9259A The ESR zero is contributed by the ESR associated with the output capacitance. Note that this requires that the output capacitor should have enough ESR to satisfy stability requirements. The ESR zero of the output capacitor expressed as follows ...
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SOP-14 0.6 0.4 0 Ambient Temperature (°C) Figure 11. Derating Curves for RT9259A Packages PCB Layout Considerations MOSFETs switch very fast and efficiently. The speed with which the current transitions from one device ...
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RT9259A 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 ...