TPS54294RSAR

The TPS54294 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. It helps system designers complete power bus regulator sets 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, which provides ultra-fast transient response without external compensation components. Adaptive on-time control supports seamless transition between PWM mode under heavy load conditions and Eco-mode™ operation under light load. Eco-mode™ enables the TPS54294 to maintain high efficiency under light load conditions. It is compatible with low ESR output capacitors such as polymer organic semiconductor solid capacitors (POSCAP) or special polymer capacitors (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×0.5mm≈16-pin TSSOP (PWP) package and a 4mm×4mm 16-pin VQFN (RSA) package, with a rated ambient operating temperature range of -40°C to 85°C. The TPS54294 is a 2A/2A dual synchronous step-down (buck) converter with two integrated N-channel MOSFETs for each channel. It operates using D-CAP2™ control mode. The fast transient response of D-CAP2™ control reduces the required output capacitance to meet a specific level of performance. Proprietary internal circuitry allows the use of low ESR output capacitors including ceramic and special polymer types.

Applications

• Point-of-load regulation in low-power systems for broad applications
• Digital TV power supplies
• Networked home terminal equipment
• Digital set-top boxes (STB)
• DVD players/recorders
• Gaming 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 7.0V
• High-efficiency integrated FETs optimized for low duty cycle applications, 150mΩ (high-side) and 100mΩ (low-side)
• High initial reference accuracy
• Low-side rDS(on) lossless current sensing
• Fixed soft-start time: 1.0ms
• Non-latching pre-bias soft-start
• Power good
• 700kHz switching frequency
• Cycle-by-cycle overcurrent limit control
• OCL / OVP / UVP / UVLO / TSD protection
• Adaptive gate driver with integrated boost PMOS switch
• Constant OCP due to thermally compensated rDS(on) of 4000ppm/°C
• 16-pin HTSSOP, 16-pin VQFN package
• Automatic skip Eco-mode™ for high efficiency at light load