FDMF8704 Datasheet, PDF (1/11 Pages) Fairchild Semiconductor – High Current / High Frequency FET plus Driver Multi-chip Module

November 2007
FDMF8704
tm
High Current / High Frequency FET plus Driver Multi-chip Module
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
„ Low profile SMD package
„ RoHS Compliant
General Description
The FDMF8704 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
5V
C_VIN
DISB
PWM
Input
VIN VCIN
DISB
BOOT
HSEN
PWM
VSWH
CGND PGND
C_VCIN
C_BOOT
OUTPUT
C_OUT
Figure 1. Powertrain Application Circuit
Ordering Information
Part
FDMF8704
Current Rating
Max
[A]
32
Input Voltage
Typical
[V]
12-19
Frequency
Max
[KHz]
1000
©2007 Fairchild Semiconductor Corporation
1
FDMF8704 Rev. F2
Device
Marking
FDMF8704
www.fairchildsemi.com