TPS54228DR

The TPS54228 device is an adaptive on-time DCAP2™ mode synchronous buck converter. It 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 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 TPS54228 to maintain high efficiency during lighter load conditions. The TPS54228 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 7 V. The device also features an adjustable soft start time. The TPS54228 is available in 8-pin SO, 8-pin SOIC, and 10-pin VSON packages, and is designed to operate over the ambient temperature range of -40°C to 85°C.

Applications

• Wide Range of Applications for Low Voltage System
• Digital TV Power Supply
• High Definition Blu-ray Disc Players
• Networking Home Terminals
• Digital Set Top Boxes (STB)

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 7 V
• Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications
• -155 mΩ (High-Side) and 108 mΩ (Low-Side)
• High Efficiency, Less than 10 μA at Shutdown
• High Initial Bandgap Reference Accuracy
• Adjustable Soft Start
• Prebiased Soft Start
• 700-kHz Switching Frequency (fSW)
• Cycle-by-Cycle Overcurrent Limit
• Auto-Skip Eco-Mode™ for High Efficiency at Light Load