FDMF8704V

FDMF8704V Datasheet

FDMF8704V High Efficiency / High Frequency FET plus Driver Multi-chip Module with Internal Voltage Regulator

Part	Datasheet
FDMF8704V	FDMF8704V (pdf)

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FDMF8704V High Efficiency / High Frequency FET plus Driver Multi-chip Module with Internal Voltage Regulator November 2007 FDMF8704V High Efficiency / High Frequency FET plus Driver Multi-chip Module with Internal Voltage Regulator - 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. - 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 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. - 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 VCIN DISB PWM BOOT HSEN VSWH CGND PGND CVCIN CBOOT OUTPUT COUT Figure Powertrain Application Circuit Ordering Information Part FDMF8704V Current Rating Max [A] Input Voltage Typical [V] 12-19 Frequency Max [KHz] 1000 2007 Fairchild Semiconductor Corporation Device Marking FDMF8704V VSWH TEST PAD 2 PGND FDMF8704V High Efficiency / High Frequency FET plus Driver Multi-chip Module with Internal Voltage Regulator Pin Configuration CGND HSEN VAUX VCIN BOOT CGND NC VIN TEST PAD 1 VIN PWM 56 DISB REGFB NC REGOUT CGND VSWH 43 A CGND B VIN C VSWH 15 VIN VSWH PGND 28 PGND Figure MLP 8x8 56L Bottom View Pin Description 1, 6, 51, A 2 3 4 Name CGND HSEN VAUX VCIN BOOT 7, 53 21, 40-50, C VSWH 8, 9, 11-20, B TEST PAD 1 22-38 PGND TEST PAD 2 REGOUT REGFB DISB 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. FDMF8704V High Efficiency / High Frequency FET plus Driver Multi-chip Module with Internal Voltage Regulator

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FDMF8704V High Efficiency / High Frequency FET plus Driver Multi-chip Module with Internal Voltage Regulator

November 2007

FDMF8704V

High Efficiency / High Frequency FET plus Driver Multi-chip Module
with Internal Voltage Regulator
- 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.
- 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

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.
- 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

VCIN

DISB PWM

BOOT HSEN VSWH

CGND PGND

CVCIN CBOOT

OUTPUT COUT

Figure Powertrain Application Circuit
Ordering Information

Part FDMF8704V

Current Rating Max [A]

Input Voltage Typical [V]
12-19

Frequency Max [KHz]
1000
2007 Fairchild Semiconductor Corporation

Device Marking FDMF8704V

VSWH TEST PAD 2 PGND

FDMF8704V High Efficiency / High Frequency FET plus Driver Multi-chip Module with Internal Voltage Regulator

Pin Configuration

CGND HSEN VAUX VCIN BOOT CGND NC VIN TEST PAD 1 VIN

PWM 56 DISB REGFB

NC REGOUT

CGND VSWH 43

A CGND

B VIN

C VSWH
15 VIN VSWH PGND
28 PGND

Figure MLP 8x8 56L Bottom View

Pin Description
1, 6, 51, A 2 3 4

Name

CGND HSEN VAUX VCIN

BOOT
7, 53
21, 40-50, C

VSWH
8, 9, 11-20, B

TEST PAD 1
22-38

PGND

TEST PAD 2

REGOUT

REGFB

DISB

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.

FDMF8704V High Efficiency / High Frequency FET plus Driver Multi-chip Module with Internal Voltage Regulator

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Datasheet ID: FDMF8704V 514206