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RT8130B Dataheets PDF



Part Number RT8130B
Manufacturers Richtek
Logo Richtek
Description 12V High Efficiency Synchronous Buck PWM Controller
Datasheet RT8130B DatasheetRT8130B Datasheet (PDF)

® RT8130B 12V High Efficiency Synchronous Buck PWM Controller General Description The RT8130B is a high efficiency single phase synchronous Buck DC/DC controller with 5V/12V supply voltage. The RT8130B has embedded MOSFET gate driver with high driving capability, supporting driving voltage up to 12V for high output current application. This device uses lossless low-side MOSFET RDS(ON) current sense technique for over-current protection with adjustable threshold set by the LGATE pin (LGOCS). Ot.

  RT8130B   RT8130B



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® RT8130B 12V High Efficiency Synchronous Buck PWM Controller General Description The RT8130B is a high efficiency single phase synchronous Buck DC/DC controller with 5V/12V supply voltage. The RT8130B has embedded MOSFET gate driver with high driving capability, supporting driving voltage up to 12V for high output current application. This device uses lossless low-side MOSFET RDS(ON) current sense technique for over-current protection with adjustable threshold set by the LGATE pin (LGOCS). Other features include power good indication, enable/disable control and internal soft-start. The RT8130B also provides fault protection functions to protect the power stage output. With above functions, the IC provides customers a costeffective solution for high efficiency power conversion. The RT8130B is available in the WDFN-10L 3x3 package. Applications  Motherboard, Memory/Chip-set Power  Graphic Card, GPU/Memory Core Power  Low Voltage, High Current DC/DC Regulator Features  High Light Load Efficiency  Single 5V to 12V Driver Voltage  Integrated High Driving Capability N-MOSFET Gate Drivers  300kHz Fixed Frequency Internal Oscillator  88% Maximum PWM Duty Cycle  Power Good Indicator  Enable/Disable Control  Internal Soft-Start  Lossless Low-Side MOSFET RDS(ON) Current Sensing for Over-Current Fault Monitoring  LGATE Over-Current Setting (LGOCS)  OCP, UVP, OVP, OTP, UVLO Ordering Information RT8130B Package Type QW : WDFN-10L 3x3 (W-Type) Note : Lead Plating System G : Green (Halogen Free and Pb Free) Richtek products are :  RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. Simplified Application Circuit VCC VPGOOD EN RT8130B VCC BOOT UGATE PGOOD COMP/EN PHASE LGATE GND FB VIN VOUT Copyright ©2016 Richtek Technology Corporation. All rights reserved. DS8130B-02 January 2016 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT8130B Pin Configurations (TOP VIEW) BOOT 1 PHASE 2 UGATE 3 LGATE 4 GND 5 GND 10 PGOOD 9 NC 8 FB 7 COMP/EN 11 6 VCC WDFN-10L 3x3 Marking Information 8X=YM DNN 8X= : Product Code YMDNN : Date Code Functional Pin Description Pin No. 1 Pin Name BOOT 2 PHASE 3 UGATE 4 LGATE 5, 11 (Exposed Pad) GND Pin Function Bootstrap Supply for High-Side Gate Driver. Connect this pin to a power source VCC through a bootstrap diode, and connect a 0.1F or greater ceramic capacitor from this pin to the PHASE pin to supply the power for high-side gate driver. Switch Node. Connect this pin to the switching node of Buck converter. This pin is also the floating drive return of the high-side MOSFET gate driver. High-Side MOSFET Gate Driver Output. Connect this pin to the Gate of highside MOSFET for floating drive. Low-Side MOSFET Gate Driver Output. Connect this pin to the Gate of low-side MOSFET. This pin is also used for Over-Current Protection (OCP) threshold setting. Connect a resistor (ROCSET) from this pin to the GND pin to set the OCP threshold. Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. 6 VCC Supply Voltage Input. It is recommended to connect a 1F or greater ceramic capacitor from this pin to the GND pin. VCC also powers the low-side gate driver. Compensation Node. Connect R-C network between this pin and the FB pin for 7 COMP/EN PWM control loop compensation. This pin is also used for enable/disable control. Connect a small signal MOSFET to this pin to implement enable/disable control. 8 FB Feedback Voltage Input. This pin is used for output voltage feedback input and it is also monitored for power good indication, over-voltage and under-voltage protections. Connect this pin to the converter output through voltage divider resistors for output voltage regulation. 9 NC No Internal Connection. Power Good Indicator Output. This pin provides an open-drain output. Connect 10 PGOOD this pin to a voltage source through a pull-up resistor. The PGOOD voltage goes high to indicate the output voltage is in regulation. This pin can be left open if the power good indication function is not used. Copyright ©2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 is a registered trademark of Richtek Technology Corporation. DS8130B-02 January 2016 Function Block Diagram COMP/EN VCC RT8130B Regulator BOOT UGATE FB - VREF EA + PWM + CMP VCC PHASE + Control IOCSET VREF CMP - UV_level + UV Logic OC Current - Sense & OCP VCC OV_level - OV + Comparator LGATE PGH_level + GND - PGL_level + -1 PGOOD Operation The RT8130B is a high efficiency single-phase synchronous Buck controller with integrated MOSFET driver. The controller has a fixed frequency control, a fixed frequency 300kHz oscillator is integrated to minimize external components. Enable The RT8130B remains in shutdown if the COMP/EN .


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