TPS54628DDAR

The TPS54628 device is an adaptive on-time DCAP2 mode synchronous-buck converter. The TPS54628 enables system designers to complete the suite of various end-equipment power-bus regulators with a cost-effective, low-component count, low-standby current solution. The main control loop for the TPS54628 uses the D-CAP2 mode control that provides a fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-Mode operation at light loads. Eco-Mode allows the TPS54628 to maintain high efficiency during lighter load conditions. The TPS54628 also has a proprietary circuit that enables the device to adopt to both low equivalent-series-resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors. The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 5.5 V. The device also features an adjustable soft-start time. The TPS54628 is available in the 8-pin SO PowerPAD package, and designed to operate from -40°C to 85°C.

Applications

• Digital-TV Power Supplies
• High-Definition Blu-Ray Disc Players
• Networking Home Terminals
• Digital Set-Top Boxes (STBs)

Key features

• D-CAP2™ Mode Enables Fast Transient Response Low-Output Ripple and Allows Ceramic Output Capacitor
• Wide VIN Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.76 V to 5.5 V
• Highly Efficient Integrated FETs Optimized for Lower Duty-Cycle Applications - 36 mΩ (High-Side) and 28 mΩ (Low-Side)
• High Efficiency, Less Than 10 μA at Shutdown
• High Initial Band-Gap Reference Accuracy
• Adjustable Soft Start
• Prebiased Soft Start
• 650-kHz Switching Frequency (fSW)
• Cycle-by-Cycle Overcurrent Limit
• Auto-Skip Eco-Mode™ for High Efficiency at Light Load