Overview
The FDMF6823A, produced by onsemi, is an ultra-compact, high-performance DrMOS (Driver-MOSFET) module designed for high-frequency synchronous buck DC-DC converter applications. This module integrates a driver IC, two power MOSFETs, and a bootstrap Schottky diode into a thermally enhanced 6x6 mm PQFN package. This integration optimizes the complete switching power stage, enhancing driver and MOSFET dynamic performance, system inductance, and power MOSFET RDS(ON). The FDMF6823A utilizes Fairchild's high-performance PowerTrench® MOSFET technology, which reduces switch ringing and eliminates the need for snubber circuits in most buck converter applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package Type | 40-Lead, Clipbond PQFN | 6.0 mm x 6.0 mm |
| Current Rating | Maximum Output Current | 60 A |
| VIN (V) | Input Voltage Range | 5 V to 12 V |
| VCIN (V) | IC Bias Supply Voltage | 3.3 V, 5 V |
| VDRV (V) | Gate Driver Power Supply Voltage | 3.3 V, 5 V |
| PWM Input | PWM Signal Input Level | 3-State, 5 V |
| Efficiency | Peak Efficiency | Over 93% |
| Thermal Warning | Activation Temperature | 150 °C |
| Propagation Delay | PWM-HIGH to GL Going LOW | 10 ns to 25 ns |
Key Features
- Ultra-compact 6x6 mm PQFN package, offering 72% space savings compared to conventional discrete solutions.
- Fully optimized system efficiency with over 93% peak efficiency.
- High-current handling capability of up to 60 A.
- High-performance PQFN copper-clip package for enhanced thermal management.
- 3-state 5 V PWM input for compatibility with a wide range of PWM controllers.
- Skip-Mode (SMOD#) for improved light-load efficiency.
- Driver output disable function (DISB# pin) and thermal warning flag (THWN# pin) for over-temperature conditions.
- Internal pull-up and pull-down for SMOD# and DISB# pins.
- Reduced dead times and propagation delays in the driver IC.
- Elimination of snubber circuits due to Fairchild's PowerTrench® MOSFET technology.
Applications
- High-performance gaming motherboards.
- Compact blade servers, V-core and non-V-core DC-DC converters.
- Desktop computers, V-core and non-V-core DC-DC converters.
- 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 package size of the FDMF6823A?
The FDMF6823A comes in an ultra-compact 6x6 mm PQFN package.
- What is the maximum output current of the FDMF6823A?
The maximum output current is 60 A.
- What are the input voltage ranges for VIN and VCIN?
VIN ranges from 5 V to 12 V, and VCIN can be either 3.3 V or 5 V.
- What type of PWM input does the FDMF6823A support?
The FDMF6823A supports a 3-state 5 V PWM input.
- What is the peak efficiency of the FDMF6823A?
The peak efficiency is over 93%.
- How does the thermal warning function work?
The thermal warning flag (THWN#) is an open collector output that pulls low when the temperature exceeds the trip limit of 150 °C.
- What is the purpose of the Skip-Mode (SMOD#) input?
The Skip-Mode input improves light-load efficiency by disabling the low-side driver when SMOD# is low.
- How does the driver output disable function work?
The driver output disable function (DISB# pin) disables the power MOSFET switching when the pin is set low.
- What technology is used in the MOSFETs of the FDMF6823A?
The FDMF6823A uses Fairchild's high-performance PowerTrench® MOSFET technology.
- What are some typical applications of the FDMF6823A?
Typical applications include high-performance gaming motherboards, compact blade servers, desktop computers, workstations, and high-current DC-DC point-of-load converters.
- How does the FDMF6823A reduce switch ringing?
The FDMF6823A reduces switch ringing through Fairchild's PowerTrench® MOSFET technology, eliminating the need for snubber circuits in most buck converter applications.
