TPS54339DDA

The TPS54339 is an adaptive on-time D-CAP2™ mode synchronous buck converter that helps system designers implement a power bus regulator set for various end equipment with a low-cost, low component count, low standby current solution. The main control loop uses D-CAP2™ mode control, achieving ultra-fast transient response without external compensation components. Proprietary circuitry enables the device to accommodate low ESR output capacitors such as polymer organic semiconductor solid capacitors (POSCAP) or 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, features an adjustable soft-start time, comes in an 8-pin DDA package, and is designed for operation over a -40°C to 85°C temperature range.

Applications

• Wide application in low-voltage systems
• Digital TV power supplies
• High-definition Blu-ray Disc players
• Network home 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 7V
• High-efficiency integrated FETs 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-biased soft-start
• 600kHz switching frequency (fSW)
• Cycle-by-cycle current limiting