Overview
The FDMF6823B is part of ON Semiconductor’s XS™ DrMOS family, representing the next-generation, fully optimized, ultra-compact, integrated MOSFET plus driver power stage solution. This module is designed for high-current, high-frequency synchronous buck DC-DC applications. It integrates a driver IC, two power MOSFETs, and a bootstrap Schottky diode into a thermally enhanced, ultra-compact 6x6 mm package. This integrated approach optimizes the complete switching power stage in terms of driver and MOSFET dynamic performance, system inductance, and power MOSFET RDS(ON).
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VCIN) | 4.5 | 5.0 | 5.5 | V |
| Output Stage Supply Voltage (VIN) | 3.0 | - | 16.0 | V |
| Current Rating | - | - | 55 A | A |
| Switching Frequency | - | - | 1 MHz | Hz |
| Thermal Warning Flag Activation Temperature | - | - | 150 °C | °C |
| Thermal Warning Flag Reset Temperature | - | - | 135 °C | °C |
| Package Type | - | - | 40-Lead, Clipbond PQFN | - |
| Package Size | - | - | 6.0 mm x 6.0 mm | mm |
Key Features
- Ultra-compact 6x6 mm PQFN package, offering 72% space-saving compared to conventional discrete solutions.
- Fully optimized system efficiency with over 93% peak efficiency.
- High-current handling capability of up to 55 A.
- High-performance PQFN copper-clip package.
- Three-state 5 V PWM input driver for compatibility with a wide range of PWM controllers.
- Skip-Mode (SMOD#) input for improved light-load efficiency.
- Driver output disable function (DISB# pin).
- Internal pull-up and pull-down for SMOD# and DISB# inputs, respectively.
- Fairchild PowerTrench® technology MOSFETs for clean voltage waveforms and reduced ringing.
- Integrated bootstrap Schottky diode and Fairchild SyncFET™ (integrated Schottky diode) technology in the low-side MOSFET.
- Adaptive gate drive timing for shoot-through protection.
- Under-voltage lockout (UVLO) and thermal warning flag for over-temperature conditions).
Applications
- High-performance gaming motherboards.
- Compact blade servers.
- V-Core and non-V-Core DC-DC converters in desktop computers and workstations).
- High-current DC-DC point-of-load converters).
- Networking and telecom microprocessor voltage regulators).
- Small form-factor voltage regulator modules).
Q & A
- What is the FDMF6823B?
The FDMF6823B is an integrated driver and MOSFET module designed for high-current, high-frequency synchronous buck DC-DC applications.
- What is the package size of the FDMF6823B?
The FDMF6823B comes in a 6x6 mm PQFN package.
- What is the maximum current rating of the FDMF6823B?
The maximum current rating of the FDMF6823B is 55 A.
- What is the switching frequency capability of the FDMF6823B?
The FDMF6823B can operate at switching frequencies up to 1 MHz.
- Does the FDMF6823B have thermal protection features?
Yes, the FDMF6823B includes a thermal warning flag to warn of over-temperature conditions.
- What is the purpose of the Skip Mode (SMOD#) in the FDMF6823B?
The Skip Mode (SMOD#) is designed to improve light-load efficiency.
- How does the three-state PWM input work in the FDMF6823B?
The three-state PWM input allows for logic HIGH, LOW, and a shutdown window, enabling features like phase shedding.
- Is the FDMF6823B RoHS compliant?
Yes, the FDMF6823B is RoHS compliant and uses Fairchild Green Packaging.
- What technology does the FDMF6823B use to reduce switch ringing?
The FDMF6823B uses Fairchild's PowerTrench® MOSFET technology to reduce switch ringing.
- Can the FDMF6823B be used in high-performance gaming motherboards?
Yes, the FDMF6823B is suitable for high-performance gaming motherboards among other applications.
