DatasheetsPDF.com

RT9619A Dataheets PDF



Part Number RT9619A
Manufacturers Richtek Technology Corporation
Logo Richtek Technology Corporation
Description Synchronous-Rectified Buck MOSFET Drivers
Datasheet RT9619A DatasheetRT9619A Datasheet (PDF)

RT9619/A Synchronous-Rectified Buck MOSFET Drivers General Description The RT9619/A is a high frequency, dual MOSFET driver specifically designed to drive two power N-Channel MOSFETs in a synchronous-rectified buck converter topology. This driver combined with Richtek's series of Multi-Phase Buck PWM controller form a complete corevoltage regulator solution for advanced micro-processors. www.DataSheet4U.com The RT9619/A drives both the lower/upper gate in a synchronous-rectifier bridge with 12V..

  RT9619A   RT9619A


Document
RT9619/A Synchronous-Rectified Buck MOSFET Drivers General Description The RT9619/A is a high frequency, dual MOSFET driver specifically designed to drive two power N-Channel MOSFETs in a synchronous-rectified buck converter topology. This driver combined with Richtek's series of Multi-Phase Buck PWM controller form a complete corevoltage regulator solution for advanced micro-processors. www.DataSheet4U.com The RT9619/A drives both the lower/upper gate in a synchronous-rectifier bridge with 12V. This drive-voltage flexibility provides the advantage of optimizing applications involving trade-offs between switching losses and conduction losses. RT9619A has longer UGATE/LGATE deadtime which can drive the MOSFETs with large gate RC value, avoiding the shoot-through phenomenon. RT9619 is targeted to drive low gate RC MOSFETs and performs better efficiency. The output drivers in the RT9619/A can efficiently switch power MOSFETs at frequency up to 500kHz. Switching frequency above 500kHz has to take into account the thermal dissipation of SOP-8 package. RT9619/A is capable to drive a 3nF load with a 30ns rise time. RT9619/A implements bootstrapping on the upper gate with an external capacitor and an embedded diode. This reduces implementation complexity and allows the use of higher performance, cost effective N-Channel MOSFETs. Adaptive shoot-through protection is integrated to prevent both MOSFETs from conducting simultaneously. Features z z z z z z z z z z Drives Two N-Channel MOSFETs Adaptive Shoot-Through Protection Embedded Boot Strapped Diode Supports High Switching Frequency Fast Output Rise Time Small SOP-8 Package Tri-State Input for Bridge Shutdown Supply Under Voltage Protection Upper MOSFET Direct Shorted Protection RoHS Compliant and 100% Lead (Pb)-Free Applications z z z Core Voltage Supplies for Desktop, Motherboard CPU High Frequency Low Profile DC-DC Converters High Current Low Voltage DC-DC Converters Ordering Information RT9619/A Package Type S : SOP-8 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) Long Dead Time Short Dead Time Note : RichTek Pb-free and Green 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. `100% matte tin (Sn) plating. Pin Configurations (TOP VIEW) BOOT PWM NC VCC 2 3 4 8 7 6 5 UGATE PHASE PGND LGATE SOP-8 DS9619/A-04 March 2007 www.richtek.com 1 www.DataSheet4U.com www.richtek.com 2 L1 2.2uH VIN C9 10uF C2 1uF C10 1000uF C11 1000uF C12 1000uF C13 10uF C14 10uF D1 RT9619/A Typical Application Circuit ATX_12V C8 10uF R2 1 1 BOOT R3 2.2 Q1 L2 1uH + ATX_12V UGATE C1 1uF RT9619/A 3 NC PWM LGATE PGND 6 5 R4 0 PWM 2 Q2 PHASE 7 R5 2.2 C3 3.3nF R1 10 4 VCC 8 VCORE + + + C4 2200uF C5 2200uF C6 10uF C7 10uF DS9619/A-04 March 2007 RT9619/A Functional Pin Description Pin No. 1 2 3 4 5 6 www.DataSheet4U.com Pin Name BOOT PWM NC VCC LGATE PGND PHASE UGATE Pin Function Floating bootstrap supply pin for upper gate drive. Input PWM signal for controlling the driver. No Connection Pin. +12V Supply Voltage. Lower Gate Drive Output. Connected to gate of low-side power N-Channel MOSFET. Common Ground. Connected this pin to the source of the high-side MOSFET and the drain of the low-side MOSFET. Upper Gate Drive Output. Connected to gate of high-side power N-Channel MOSFET. 7 8 Function Block Diagram VCC Internal 5V POR R PWM R Turn off Detect VCC Shoot-Through Protection LGATE PGND PHASE Tri-State Detect Shoot-Through Protection BOOT UGATE Timing Diagram PWM LGATE tpdlLGATE 90% 2V tpdlUGATE 2V 90% 2V UGATE tpdhUGATE tpdhLGATE 2V DS9619/A-04 March 2007 www.richtek.com 3 RT9619/A Absolute Maximum Ratings z z (Note 1) −0.3V to 15V −0.3V to 15V −0.3V to VCC + 15V −0.3V to 42V −5V to 15V −10V to 30V GND − 0.3V to VCC + 0.3V −2V to VCC + 0.3V VPHASE − 0.3V to VBOOT + 0.3V VPHASE − 2V to VBOOT + 0.3V GND − 0.3V to 7V 0.625W 160°C/W 260°C −40°C to 150°C 2kV 200V Supply Voltage, VCC ------------------------------------------------------------------------------------BOOT to PHASE ----------------------------------------------------------------------------------------z BOOT to GND DC -----------------------------------------------------------------------------------------------------------< 200ns ----------------------------------------------------------------------------------------------------z PHASE to GND DC -----------------------------------------------------------------------------------------------------------< 200ns ----------------------------------------------------------------------------------------------------z LGATE www.DataSheet4U.com DC -----------------------------------------------------------------------------------------------------------< 200ns ----------------------------------------------------------------------------------------------------z UGATE -----------------------.


RT9619 RT9619A RT9643


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)