TPS56628DDAR

TPS56628 is an adaptive on-time D-CAP2™ mode synchronous buck converter. It helps system designers implement a power bus regulator set for various end equipment through a cost-effective, low component count, low standby current solution. The main control loop uses D-CAP2™ mode control, which provides fast transient response without external compensation components. Adaptive on-time control enables seamless transition between PWM mode under heavy load conditions and Eco-mode™ operation under light load. Eco-mode™ allows the TPS56628 to maintain high efficiency under light load conditions. Proprietary circuitry also enables the device to support low ESR output capacitors such as POSCAPs or SP-CAPs, as well as ultra-low ESR ceramic capacitors. The device operates with an input voltage range of 4.5V to 18V VIN. The output voltage is adjustable from 0.76V to 5.5V. It is available in an 8-pin DDA package and is designed to operate 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
• 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 18V
• Output voltage range: 0.76V to 5.5V
• High-efficiency integrated FET
• Optimized for low duty cycle applications
• 36mΩ (high-side) and 28mΩ (low-side)
• High efficiency, shutdown current less than 10μA
• High initial bandgap reference accuracy
• Pre-biased soft-start
• 650kHz switching frequency (fSW)
• Cycle-by-cycle overcurrent limiting
• Automatic skip Eco-mode™ for high efficiency at light load
• Power good output
• Fixed soft-start time: 1.0ms