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RT9618

Richtek Technology Corporation
Part Number RT9618
Manufacturer Richtek Technology Corporation
Description Synchronous-Rectified Buck MOSFET Drivers
Published Jan 2, 2009
Detailed Description RT9618/A Synchronous-Rectified Buck MOSFET Drivers General Description The RT9618/A is a high frequency, dual MOSFET dri...
Datasheet PDF File RT9618 PDF File

RT9618
RT9618

Overview
RT9618/A Synchronous-Rectified Buck MOSFET Drivers General Description The RT9618/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 RT9618/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.
RT9618A has longer UGATE/LGATE deadtime which can drive the MOSFETs with large gate RC value, avoiding the shoot-through phenomenon.
RT9618 is targeted to drive low gate RC MOSFETs and performs better efficiency.
The output drivers in the RT9618/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.
RT9618/A is capable to drive a 3nF load with a 30ns rise time.
RT9618/ 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 Support 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 RT9618/A Package Type S : S...


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