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TPS28225

  

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Part NameTPS28225 Texas-Instruments
Texas Instruments Texas-Instruments
DescriptionHigh-Frequency 4-A Sink Synchronous MOSFET Drivers
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Description
The TPS28225 is a high-speed driver for N-channel complimentary driven power MOSFETs with adaptive dead-time control. This driver is optimized for use in variety of high-current one and multi-phase DC-to-DC converters. The TPS28225 is a solution that provides high efficiency, small size and low EMI emissions.
The efficiency is achieved by up to 8.8-V gate drive voltage, 14-ns adaptive dead-time control, 14-ns propagation delays and high-current 2-A source and 4-A sink drive capability. The 0.4-Ω impedance for the lower gate driver holds the gate of power MOSFET below its threshold and ensures no shoot-through current at high dV/dt phase node transitions. The bootstrap capacitor charged by an internal diode allows use of N-channel MOSFETs in a half-bridge configuration.

Features
• Drives Two N-Channel MOSFETs with 14-ns
   Adaptive Dead Time
• Wide Gate Drive Voltage: 4.5 V Up to 8.8 V With
   Best Efficiency at 7 V to 8 V
• Wide Power System Train Input Voltage: 3 V Up
   to 27 V
• Wide Input PWM Signals: 2.0 V up to 13.2-V
   Amplitude
• Capable to Drive MOSFETs with ≥40-A Current
   per Phase
• High Frequency Operation: 14-ns Propagation
   Delay and 10-ns Rise/Fall Time Allow FSW – 2
   MHz
• Capable to Propagate <30-ns Input PWM Pulses
• Low-Side Driver Sink On-Resistance (0.4 Ω)
   Prevents dV/dT Related Shoot-Through Current
• 3-State PWM Input for Power Stage Shutdown
• Space Saving Enable (Input) and Power Good
   (Output) Signals on Same Pin
• Thermal Shutdown
• UVLO Protection
• Internal Bootstrap Diode
• Economical SOIC-8 and Thermally Enhanced 3-
   mm x 3-mm DFN-8 Packages
• High Performance Replacement for Popular 3-
   State Input Drivers

Applications
• Multi-Phase DC-to-DC Converters with Analog or
   Digital Control
• Desktop and Server VRMs and EVRDs
• Portable and Notebook Regulators
• Synchronous Rectification for Isolated Power
   Supplies

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