Multi-chip Module. FDMF8704V Datasheet

FDMF8704V Datasheet PDF, Equivalent


Part Number

FDMF8704V

Description

High Efficiency / High Frequency FET plus Driver Multi-chip Module

Manufacture

Fairchild Semiconductor

Total Page 11 Pages
PDF Download
Download FDMF8704V Datasheet PDF


FDMF8704V Datasheet
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

FDMF8704V Datasheet
Pin Configuration
www.datasheet4u.com
1 14
PWM 56
DISB
REGFB
NC
REGOUT
CGND
VSWH
VSWH
VSWH
VSWH
VSWH
VSWH
VSWH
VSWH 43
A
(CGND)
B
(VIN)
C
(VSWH)
15 VIN
VIN
VIN
VIN
VIN
VIN
VSWH
PGND
PGND
PGND
PGND
PGND
PGND
28 PGND
42 29
Figure 2. MLP 8x8 56L Bottom View
Pin Description
Pin
1, 6, 51, A
2
3
4
Name
CGND
HSEN
VAUX
VCIN
5 BOOT
7, 53
NC
21, 40-50, C
VSWH
8, 9, 11-20, B
VIN
10 TEST PAD 1
22-38
PGND
39 TEST PAD 2
52 REGOUT
54 REGFB
55 DISB
56 PWM
Function
IC Ground. Ground return for driver IC.
High Side FET Enable. Must be connected to BOOT pin.
Auxiliary Power for 5V regulator Op-Amp.
IC Supply. +5V chip bias power. Bypass with a 1µF ceramic capacitor.
Bootstrap Supply Input. Provides voltage supply to high-side MOSFET driver. Connect to
bootstrap capacitor.
No Connect.
Switch Node Input. SW Provides return for high-side bootstrapped driver and acts as a
sense point for the adaptive shoot-thru protection.
Power Input. Output stage supply voltage.
For manufacturing test only. HDRV pin. This pin must be floated. Must not be connected to
any pin.
Power Ground. Output stage ground. Source pin of low side MOSFET(s).
For manufacturing test only. LDRV pin. This pin must be floated. Must not be connected to
any pin.
Regulator Driver Output. An external NPN transistor is used to generate the 5V output
voltage with internal controller.
Regulation Sense Input. The internal resistor divider will set this voltage to be regulated at
5V.
Output Disable. When low, this pin disable FET switching (HDRV and LDRV are held low).
PWM Signal Input. This pin accepts a logic-level PWM signal from the controller.
2 www.fairchildsemi.com
FDMF8704V Rev. G


Features Datasheet pdf FDMF8704V High Efficiency / High Frequen cy FET plus Driver Multi-chip Module wi th Internal Voltage Regulator November 2007 FDMF8704V www.datasheet4u.com t m High Efficiency / High Frequency FET plus Driver Multi-chip Module with Int ernal Voltage Regulator Benefits „ Ful ly optimized system efficiency. Higher efficiency levels are achievable compar ed with conventional discrete component s. „ Space savings of up to 50% PCB ve rsus discrete solutions. „ Higher freq uency of operation. „ Simpler system d esign and board layout. Reduced time in component selection and optimization. General Description The FDMF8704V is a fully optimized integrated Driver plus MOSFET power stage solution for high c urrent synchronous buck DC-DC applicati ons. The device integrates a driver IC and two Power MOSFETs into a space savi ng, MLP 8x8, 56-pin package. Fairchild Semiconductor’s integrated approach o ptimizes the complete switching power s tage with regards to driver to FET dynamic performance, system induct.
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