FAN5110MX

FAN5110MX Datasheet

FAN5110 Two-Phase, Bootstrapped, 12V NMOSFET Half-Bridge Driver

Part	Datasheet
FAN5110MX	FAN5110MX (pdf)

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FAN5110 Two-Phase, Bootstrapped, 12V NMOSFET Half-Bridge Driver May 2008 FAN5110 Two-Phase, Bootstrapped, 12V NMOSFET Half-Bridge Driver Two-phase, N-channel MOSFET driver in a Single Compact Package for Multi-phase Buck Converter Applications Each Phase Drives the N-channel High-side and Low-side MOSFETs in a Synchronous Buck Configuration Two-phase Driver Reduces Printed Circuit Board Area Variable High-side and Low-side Gate Drive Voltages for Flexibility and Performance Optimization at Higher Frequencies Internal Adaptive “Shoot-through” Protection Fast Rise and Fall Times High Switching Frequency up to 1 MHz Common Enable EN Turns Off both Upper and Lower Output FETs TTL-compatible PWM and EN Inputs Under-Voltage Lockout Protection Feature Available in SOIC-16 and MLP-16 Packages Multi-Phase VRM/VRD Regulators for Microprocessor Supplies Two Separate, Single-phase Supply Designs High-Current, High-Frequency DC/DC Converters High-Power Modular Supplies General-Purpose, TTL Input, 12V Driver for Half-Bridge and Full-Bridge Applications FAN5110 contains two N-channel MOSFET drivers on a single die in one package. It replaces two single-phase drivers in a multiple-phase PWM design. Each phase is specifically designed to drive both the upper and lower N-channel power MOSFETs of a synchronous rectified buck converter at high switching frequencies. This two-phase driver, combined with a Fairchild multiphase PWM controller and power MOSFETs, forms a complete V-core power supply solution for advanced microprocessors. The lower drivers are powered externally through the PVCC pin. The PVCC pin is normally connected to VCC, which drives the lower MOSFET’s gates at 12VGS. Connecting the PVCC pin to a voltage lower than VCC lowers the VGS voltage, resulting in much less driver power dissipation. This is especially valuable when driving MOSFETs with high gate charge Qgtot and in applications requiring high switching frequencies. The driver’s adaptive shoot-through protection prevents the upper and lower MOSFETs from conducting simultaneously. The FAN5110 is rated for operation from 0°C to +85°C and is available in a low-cost 16-pin Small Outline Integrated Circuit SOIC package and a higher power MLP-16 package. Related Resources AN-6003 “Shoot-through” in Synchronous Buck Converters Ordering Information FAN5110MX FAN5110MPX Operating Temperature Range 0°C to 85°C 0°C to 85°C Package SOIC-16 MLP-16, 4x4mm Eco Status Packing Method Tape and Reel Tape and Reel Quantity Per Reel 2500 For Fairchild’s definition of “green” Eco Status, please visit: FAN5110 Two-Phase, Bootstrapped, 12V NMOSFET Half-Bridge Driver Pin Configurations Figure Packages Top View Pin Definitions MLP SOIC Name Description Switch Node Input. Connect as shown in Figure SW provides return for the high-side bootstrapped driver and acts as a sense point for the adaptive shoot-through protection. 16 HDRV2 High-Side Gate Drive Output. Connect to the gate of the high-side power MOSFET s . BOOT2 Bootstrap Supply Input. Provides voltage supply to the high-side MOSFET driver. Connect to bootstrap capacitor and diode. Enable. When LOW, this pin disables FET switching HDRV and LDRV are held LOW . This pin is common for both drivers previously referred to as OD# . 3 PWM2 PWM Signal Input. Accepts a logic-level PWM signal from the controller. VSS Signal Ground. Connect directly to the ground plane. 5 PWM1 PWM Signal Input. Accepts a logic-level PWM signal from the controller. Power Input Voltage. +12V power for the internal logic. Bypass with a minimum 1µF X7R or 4.7µF X5R ceramic capacitor. BOOT1 Bootstrap Supply Input. Provides voltage supply to the high-side MOSFET driver. Connect to bootstrap capacitor and diode. 8 HDRV1 High Gate Drive Output. Connect to the gate of the high-side power MOSFET s . Switch Node Input. Connect as shown in Figure SW provides return for the high-side bootstrapped driver and acts as a sense point for the adaptive shoot-through protection. 10 PGND1 Power Ground. Connect directly to the source of low-side MOSFET s and CVCC. 11 LDRV1 Low-Side Gate Drive Output. Connect to the gate of the low-side power MOSFET s . PVCC Lower Gate Drive Voltage. This is the input supply for the lower drivers. The VGS of the lower MOSFETs matches this voltage. Connect to VCC or a lower voltage. 13 LDRV2 Lower Gate Drive Output. Connect to the gate of the low-side power MOSFET s . 14 PGND2 Power Ground. Connect directly to the source of low-side MOSFET s and CVCC. Paddle MLP Package Only. Connected to ground inside the chip. Connect to ground plane for lowest thermal resistance. 2006 Fairchild Semiconductor Corporation FAN5110 Two-Phase, Bootstrapped, 12V NMOSFET Half-Bridge Driver Application Diagram

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FAN5110 Two-Phase, Bootstrapped, 12V NMOSFET Half-Bridge Driver

May 2008

FAN5110 Two-Phase, Bootstrapped, 12V NMOSFET Half-Bridge Driver

Two-phase, N-channel MOSFET driver in a Single

Compact Package for Multi-phase Buck Converter Applications

Each Phase Drives the N-channel High-side and

Low-side MOSFETs in a Synchronous Buck Configuration

Two-phase Driver Reduces Printed Circuit Board

Area

Variable High-side and Low-side Gate Drive Voltages
for Flexibility and Performance Optimization at Higher Frequencies

Internal Adaptive “Shoot-through” Protection Fast Rise and Fall Times High Switching Frequency up to 1 MHz Common Enable EN Turns Off both Upper and

Lower Output FETs

TTL-compatible PWM and EN Inputs Under-Voltage Lockout Protection Feature Available in SOIC-16 and MLP-16 Packages

Multi-Phase VRM/VRD Regulators for

Microprocessor Supplies

Two Separate, Single-phase Supply Designs High-Current, High-Frequency DC/DC Converters High-Power Modular Supplies General-Purpose, TTL Input, 12V Driver for

Half-Bridge and Full-Bridge Applications

FAN5110 contains two N-channel MOSFET drivers on a single die in one package. It replaces two single-phase drivers in a multiple-phase PWM design. Each phase is specifically designed to drive both the upper and lower N-channel power MOSFETs of a synchronous rectified buck converter at high switching frequencies.

This two-phase driver, combined with a Fairchild multiphase PWM controller and power MOSFETs, forms a complete V-core power supply solution for advanced microprocessors.

The lower drivers are powered externally through the PVCC pin. The PVCC pin is normally connected to VCC, which drives the lower MOSFET’s gates at 12VGS. Connecting the PVCC pin to a voltage lower than VCC lowers the VGS voltage, resulting in much less driver power dissipation. This is especially valuable when driving MOSFETs with high gate charge Qgtot and in applications requiring high switching frequencies.

The driver’s adaptive shoot-through protection prevents the upper and lower MOSFETs from conducting simultaneously. The FAN5110 is rated for operation from 0°C to +85°C and is available in a low-cost 16-pin Small Outline Integrated Circuit SOIC package and a higher power MLP-16 package.

Related Resources

AN-6003 “Shoot-through” in Synchronous

Buck Converters
Ordering Information

FAN5110MX FAN5110MPX

Operating Temperature Range
0°C to 85°C 0°C to 85°C

Package

SOIC-16 MLP-16, 4x4mm

Eco Status

Packing Method

Tape and Reel Tape and Reel

Quantity Per Reel
2500

For Fairchild’s definition of “green” Eco Status, please visit:

FAN5110 Two-Phase, Bootstrapped, 12V NMOSFET Half-Bridge Driver

Pin Configurations

Figure Packages Top View

Pin Definitions

MLP SOIC Name Description

Switch Node Input. Connect as shown in Figure SW provides return for the high-side bootstrapped driver and acts as a sense point for the adaptive shoot-through protection.
16 HDRV2 High-Side Gate Drive Output. Connect to the gate of the high-side power MOSFET s .

BOOT2

Bootstrap Supply Input. Provides voltage supply to the high-side MOSFET driver. Connect to bootstrap capacitor and diode.

Enable. When LOW, this pin disables FET switching HDRV and LDRV are held LOW . This pin is common for both drivers previously referred to as OD# .
3 PWM2 PWM Signal Input. Accepts a logic-level PWM signal from the controller.

VSS Signal Ground. Connect directly to the ground plane.
5 PWM1 PWM Signal Input. Accepts a logic-level PWM signal from the controller.

Power Input Voltage. +12V power for the internal logic. Bypass with a minimum 1µF X7R or 4.7µF X5R ceramic capacitor.

BOOT1

Bootstrap Supply Input. Provides voltage supply to the high-side MOSFET driver. Connect to bootstrap capacitor and diode.
8 HDRV1 High Gate Drive Output. Connect to the gate of the high-side power MOSFET s .

Switch Node Input. Connect as shown in Figure SW provides return for the high-side bootstrapped driver and acts as a sense point for the adaptive shoot-through protection.
10 PGND1 Power Ground. Connect directly to the source of low-side MOSFET s and CVCC.
11 LDRV1 Low-Side Gate Drive Output. Connect to the gate of the low-side power MOSFET s .

PVCC

Lower Gate Drive Voltage. This is the input supply for the lower drivers. The VGS of the lower MOSFETs matches this voltage. Connect to VCC or a lower voltage.
13 LDRV2 Lower Gate Drive Output. Connect to the gate of the low-side power MOSFET s .
14 PGND2 Power Ground. Connect directly to the source of low-side MOSFET s and CVCC.

Paddle

MLP Package Only. Connected to ground inside the chip. Connect to ground plane for lowest thermal resistance.
2006 Fairchild Semiconductor Corporation

FAN5110 Two-Phase, Bootstrapped, 12V NMOSFET Half-Bridge Driver

Application Diagram

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Datasheet ID: FAN5110MX 513923