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PDF FDMF8704V Data sheet ( Hoja de datos )
| Número de pieza | FDMF8704V | |
| Descripción | High Efficiency / High Frequency FET plus Driver Multi-chip Module | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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November 2007
FDMF8704V
tm
High Efficiency / High Frequency FET plus Driver Multi-chip Module
www.datashweeti4tuh.comInternal Voltage Regulator
Benefits
Fully optimized system efficiency. Higher efficiency levels
are achievable compared with conventional discrete
components.
Space savings of up to 50% PCB versus discrete solutions.
Higher frequency of operation.
Simpler system design and board layout. Reduced time in
component selection and optimization.
Features
7V to 20V Input Voltage Range
Output current to 32A
1MHz switching frequency capable
Internal adaptive gate drive
Low Side FET with Integrated Schottky Diode
Peak Efficiency >90%
Output disable for lost phase shutdown
Integrated 5V regulator
Low profile SMD package
RoHS Compliant
General Description
The FDMF8704V is a fully optimized integrated Driver plus
MOSFET power stage solution for high current synchronous
buck DC-DC applications. The device integrates a driver IC and
two Power MOSFETs into a space saving, MLP 8x8, 56-pin
package. Fairchild Semiconductor’s integrated approach
optimizes the complete switching power stage with regards to
driver to FET dynamic performance, system inductance and
overall solution ON resistance. Package parasitics and
problematical layouts associated with conventional discrete
solutions are greatly reduced. This integrated approach results
in significant board space saving, therefore maximizing footprint
power density. This solution is based on the Intel™ DrMOS
specification.
Applications
Desktop and server VR11.x V-core and non V-core buck
converters.
CPU/GPU power train in game consoles and high end
desktop systems.
High-current DC-DC Point of Load (POL) converters.
Networking and telecom microprocessor voltage regulators.
Small form factor voltage regulator modules.
Powertrain Application Circuit
7 - 20V
CVIN
DISB
PWM
Input
VAUX REGOUT REGFB
VIN VCIN
DISB
PWM
BOOT
HSEN
VSWH
CGND PGND
CVCIN
CBOOT
OUTPUT
COUT
Figure 1. Powertrain Application Circuit
Ordering Information
Part
FDMF8704V
Current Rating
Max
[A]
32
Input Voltage
Typical
[V]
12-19
Frequency
Max
[KHz]
1000
©2007 Fairchild Semiconductor Corporation
FDMF8704V Rev. G
1
Device
Marking
FDMF8704V
www.fairchildsemi.com
1 page  
Timing Diagram
www.datasheet4u.com
DISB
VIL(DISB)
VIH(DISB)
tPDL(DISB)
tPDH(DISB)
LDRV / HDRV
Figure 4. Output Disable Timing
VIH(PWM)
PWM
tPDL(LDRV)
VIL(PWM)
LDRV
1.2V
tPDH(HDRV)
HDRV-SW
tPDL(HDRV)
tPDH(LDRV)
SW
2.2V
Figure 5. Adaptive Gate Drive Timing
5 www.fairchildsemi.com
FDMF8704V Rev. G
5 Page 
TRADEMARKS
The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global
www.datashseuebt4siud.icaorimes, and is not intended to be an exhaustive list of all such trademarks.
ACEx®
Build it Now™
CorePLUS™
CROSSVOLT™
FPS™
FRFET®
Global Power ResourceSM
Green FPS™
PDP-SPM™
Power220®
Power247®
POWEREDGE®
SyncFET™
®
The Power Franchise®
CTL™
Current Transfer Logic™
EcoSPARK®
EZSWITCH™ *
™
®
Fairchild®
Fairchild Semiconductor®
FACT Quiet Series™
FACT®
FAST®
FastvCore™
FlashWriter® *
Green FPS™ e-Series™
GTO™
i-Lo™
IntelliMAX™
ISOPLANAR™
MegaBuck™
MICROCOUPLER™
MicroFET™
MicroPak™
MillerDrive™
Motion-SPM™
OPTOLOGIC®
OPTOPLANAR®
®
Power-SPM™
PowerTrench®
Programmable Active Droop™
QFET®
QS™
QT Optoelectronics™
Quiet Series™
RapidConfigure™
SMART START™
SPM®
STEALTH™
SuperFET™
SuperSOT™-3
SuperSOT™-6
TinyBoost™
TinyBuck™
TinyLogic®
TINYOPTO™
TinyPower™
TinyPWM™
TinyWire™
μSerDes™
UHC®
Ultra FRFET™
UniFET™
VCX™
SuperSOT™-8
* EZSWITCH™ and FlashWriter® are trademarks of System General Corporation, used under license by Fairchild Semiconductor.
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS
HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE
APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS
PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in a significant injury of the user.
2. A critical component in any component of a life support,
device, or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification Product Status
Advance Information
Formative or In Design
Preliminary
First Production
No Identification Needed Full Production
Obsolete
Not In Production
Definition
This datasheet contains the design specifications for product
development. Specifications may change in any manner without notice.
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve design.
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice to improve
the design.
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed for
reference information only.
Rev. I32
© 2007 Fairchild Semiconductor Corporation
www.fairchildsemi.com
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