TPS54239EDDA

The TPS54239E is an adaptive on-time D-CAP2™ mode synchronous buck converter. It helps system designers implement a complete power bus regulator set for various end equipment using a low-cost, low component count, low standby current solution. The main control loop employs D-CAP2™ mode control, achieving extremely fast transient response without external compensation components. Adaptive on-time control enables seamless transitions between PWM mode under heavy load conditions and Eco-mode™ operation under light load. Eco-mode™ allows the TPS54239 to maintain high efficiency under light load conditions. Proprietary circuitry also helps the device accommodate low ESR output capacitors such as polymer organic semiconductor solid capacitors (POSCAP) or specialty polymer capacitors (SP-CAP), as well as ultra-low ESR ceramic capacitors. The operating input voltage ranges from 4.5V to 23V VIN. The output voltage is adjustable between 0.76V and 7V. Additionally, the device features an adjustable soft-start time. It is available in an 8-pin DDA package and is designed for operation over a temperature range of -40°C to 85°C.

Applications

• Wide application in low-voltage systems
• Digital TV power supplies
• High-definition Blu-ray Disc players
• Home network terminal equipment
• Digital set-top boxes (STB)

Key features

• D-CAP2™ mode for fast transient response
• Low output ripple, compatible with ceramic output capacitors
• Wide input voltage range: 4.5V to 23V
• Output voltage range: 0.76V to 7.0V
• High-efficiency integrated FET
• Optimized for lower duty cycle applications
• -140mΩ (high-side) and 70mΩ (low-side)
• High efficiency in shutdown, quiescent current below 10μA
• High accuracy initial bandgap reference
• Adjustable soft-start
• Pre-bias soft-start
• 600kHz switching frequency (fSW)
• Cycle-by-cycle current limiting
• Automatic skip Eco-mode™ for high efficiency at light load