Is Now Part of To learn more about ON Semiconductor, please visit our website at www.onsemi.com Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers will need to change in order to meet ON Semiconductors system requirements. Since the ON Semiconductor product management systems do not have the ability to manage part nomenclature that utilizes an underscore ( ), the underscore ( ) in the Fairchild part numbers will be changed to a dash (-). This document may contain device numbers with an underscore ( ). Please check the ON Semiconductor website to verify the updated device numbers. The most current and up-to-date ordering information can be found at www.onsemi.com. Please email any questions regarding the system integration to Fairchild questions onsemi.com. ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductors product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. Typical parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including Typicals must be validated for each customer application by customers technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.FDMF8704 High Efficiency / High Frequency FET plus Driver Multi-chip Module November 2007 FDMF8704 tm High Efficiency / High Frequency FET plus Driver Multi-chip Module Benefits General Description Fully optimized system efficiency. Higher efficiency levels The FDMF8704 is a fully optimized integrated Driver plus are achievable compared with conventional discrete MOSFET power stage solution for high current synchronous components. buck DC-DC applications. The device integrates a driver IC and two Power MOSFETs into a space saving, MLP 8x8, 56-pin Space savings of up to 50% PCB versus discrete solutions. package. Fairchild Semiconductors integrated approach Higher frequency of operation. optimizes the complete switching power stage with regards to Simpler system design and board layout. Reduced time in driver to FET dynamic performance, system inductance and component selection and optimization. overall solution ON resistance. Package parasitics and problematical layouts associated with conventional discrete Features solutions are greatly reduced. This integrated approach results in significant board space saving, therefore maximizing footprint 7V to 20V Input Voltage Range power density. This solution is based on the Intel DrMOS Output current to 32A specification. 1MHz switching frequency capable Internal adaptive gate drive Applications Low Side FET with Integrated Schottky Diode Desktop and server VR11.x V-core and non V-core buck Peak Efficiency >90% converters. Output disable for lost phase shutdown CPU/GPU power train in game consoles and high end Low profile SMD package desktop systems. RoHS Compliant High-current DC-DC Point of Load (POL) converters. Networking and telecom microprocessor voltage regulators. Small form factor voltage regulator modules. Powertrain Application Circuit 5V 7 - 20V C VCIN C VIN VIN VCIN DISB DISB BOOT HSEN C BOOT PWM PWM VSWH OUTPUT Input C CGND PGND OUT Figure 1. Powertrain Application Circuit Ordering Information Current Rating Input Voltage Frequency Max Typical Max Device Part A V KHz Marking FDMF8704 32 12-19 1000 FDMF8704 2007 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com FDMF8704 Rev. G