TPS54495PWPR

The TPS54495 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. It helps system designers complete the power bus regulator set for various end equipment with a cost-effective, low component count, and low standby current solution. The main control loop uses D-CAP2™ mode control, providing ultra-fast transient response without external compensation components. Adaptive on-time control supports seamless transition between PWM mode under heavier load conditions and Eco-mode™ operation under light loads. Eco-mode™ enables the TPS54495 to maintain high efficiency under light load conditions. It is compatible with low ESR capacitors such as POSCAP or SP-CAP, as well as ultra-low ESR ceramic capacitors. The device provides convenient and efficient operation with input voltages between 4.5V and 18V. Available in a 4.4mm×5mm 16-pin TSSOP (PWP) package and a 4mm×4mm 16-pin VQFN (RSA) package, designed for operation over an ambient temperature range of -40°C to 85°C.

Applications

• Point-of-load regulation for low-power systems in broad applications
• Digital TV power supplies
• Networked home terminal equipment
• Digital set-top boxes (STB)
• DVD players/recorders
• Game consoles and other devices

Key features

• D-CAP2™ control mode, fast transient response, no external components required for loop compensation, compatible with ceramic output capacitors
• Wide input voltage range: 4.5V to 18V
• Output voltage range: 0.76V to 7V
• High-efficiency integrated FETs optimized for low duty cycle applications, 90mΩ (high-side) and 60mΩ (low-side)
• High initial reference accuracy
• Supports constant 4A CH1 and 2A CH2 load current
• Low-side rDS(on) low-loss current sensing
• Adjustable soft-start
• Non-sinking pre-bias soft-start
• 700kHz switching frequency
• Cycle-by-cycle overcurrent limit control
• Overcurrent limit (OCL) / undervoltage lockout (UVLO) / thermal shutdown (TSD) protection
• Hiccup timer for overload protection
• Adaptive gate driver with integrated boost PMOS switch
• Constant OCP due to thermally compensated rDS(on) value of 4000ppm/℃
• 16-pin HTSSOP and 16-pin VQFN packages
• Automatic skip Eco-mode™ for high efficiency at light load