FDMF5820TDC: Smart Power Stage (SPS) Module with Integrated Thermal Warning

The SPS family is Fairchild’s next-generation, fully optimized, ultra-compact, integrated MOSFET plus synchronous buck, DC-DC applications. The FDMF5820TDC integrates a driver IC with a bootstrap Schottky diode, two power MOSFETs, and a thermal monitor into a thermally enhanced, ultra-compact, 5 mm x 5 mm package.

With an integrated approach, the SPS switching power stage is optimized for driver and MOSFET dynamic performance, minimized system inductance, and power MOSFET RDS(ON). The SPS family uses Fairchild's highperformance The SPS family uses Fairchild's highperformance PowerTrench® MOSFET technology, which reduces switch ringing, eliminating the need for a snubber circuit in most buck converter applications.

A driver IC with reduced dead times and propagation delays further enhances the performance. A thermal warning function warns of a potential over-temperature situation. The FDMF5820TDC incorporates an Auto- DCM Mode (ZCD#) for improved light-load efficiency. The FDMF5820TDC also provides a 3-state 3.3 V PWM input for compatibility with a wide range of PWM controllers.

Features

• Ultra-Compact 5 mm x 5 mm PQFN Copper-Clip Package with Flip Chip Low-Side MOSFET and Dual Cool Architecture
  
• High Current Handling: 60 A
  
• 3-State 3.3 V PWM Input Gate Driver
  
• Dynamic Resistance Mode for Low-Side Drive (LDRV) Slows Low-Side MOSFET during Negative Inductor Current Switching
  
• Auto DCM (Low-Side Gate Turn Off) Using ZCD# Input
  
• Thermal Warning (THWN#) to Warn Over- Temperature of Gate Driver IC
  
• HS-Short Detect Fault# / Shutdown
  
• Dual Mode Enable / Fault# Pin
  
• Internal Pull-Up and Pull-Down for ZCD# and EN Inputs, respectively
  
• Fairchild PowerTrench® MOSFETs for Clean Voltage Waveforms and Reduced Ringing
  
• Fairchild SyncFET™ Technology (Integrated Schottky Diode) in Low-Side MOSFET
  
• Integrated Bootstrap Schottky Diode
  
• Optimized / Extremely Short Dead-Times
  
• Under-Voltage Lockout (UVLO) on VCC
  
• Optimized for Switching Frequencies up to 1.5 MHz
  
• PWM Minimum Controllable On-Time: 30 ns
  
• Low Shutdown Current: < 3 μA
  
• Optimized FET Pair for Highest Efficiency: 10 ~ 15% Duty Cycle
  
• Operating Junction Temperature Range: -40°C to +125°C
  
• Fairchild Green Packaging and RoHS Compliance