TPS54678RTER

Description
The TPS54428 is an adaptive on-time D-CAP2™ mode synchronous buck converter.
The TPS54428 enables system designers tocomplete 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 TPS54428 uses the DCAP2™ 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 loadconditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS54428 to maintain high efficiency during lighter load conditions.
The TPS54428 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 7.0 V.
The device also features an adjustable soft start time.
The TPS54428 is available in 8-pin DDA package and 10-pin DRC packages, and is designed to operate over the ambient temperature range of –40°C to 85°C.
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 7.0 V
• Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications– 70 mΩ (High Side) and 53 mΩ (Low Side)
• High Efficiency, Less Than 10 μA at Shutdown
• High Initial Bandgap Reference Accuracy
• Adjustable Soft Start
• Pre-Biased Soft Start
• 650-kHz Switching Frequency (fSW)
• Cycle By Cycle Over Current Limit
• Auto-Skip Eco-mode™ for High Efficiency at Light Load Applications
• Wide Range of Applications for Low Voltage System– Digital TV Power Supply– High Definition Blu-ray Disc™ Players– Networking Home Terminal– Digital Set Top Box (STB)