TPS542951PWPR

The TPS542951 is a dual, adaptive on-time DCAP2 mode synchronous buck converter. The TPS542951 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS542951 use the D-CAP2 mode control which provides a very 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 TPS542951 to maintain high efficiency during lighter load conditions. The TPS542951 is able to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SPCAP, and ultra-low ESR, ceramic capacitors. The device provides convenient and efficient operation with input voltages from 4.5 V to 18 V. The TPS542951 is available in a 4.4 mm×5.0 mm 16 pin TSSOP (PWP) package, and 4mm x 4mm 16 pin VQFN (RSA) package, and is specified for an ambient temperature range from -40 °C to 85 °C.

Applications

• Point-of-Load Regulation in Low Power Systems for Wide Range of Applications
• Digital TV Power Supply
• Networking Home Terminal
• Digital Set Top Box (STB)
• DVD Player/Recorder
• Gaming Consoles and Other

Key features

• D-CAP2 Control Mode
• Fast Transient Response
• No External Parts Required For Loop Compensation
• Compatible with Ceramic Output Capacitors
• Wide Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.76V to 7.0V
• Highly Efficient Integrated FETs Optimized for Low Duty Cycle Applications – 150 mΩ (High Side) and 100 mΩ (Low Side)
• High Initial Reference Accuracy
• Supports Constant 2 A CH1 and 3 A CH2 Load Current
• Low-Side rDS(on) Loss-Less Current Sensing
• Adjustable Soft Start
• Non-Sinking Pre-Biased Soft Start
• 700 kHz Switching Frequency
• Cycle-by-Cycle Over-Current Limit Control
• OCL/UVLO/TSD Protections
• Hiccup Timer for Overload Protection
• Adaptive Gate Drivers with Integrated Boost PMOS Switch
• OCP Constant Due To Thermally Compensated rDS(on) with 4000ppm/℃
• 16-Pin HTSSOP, 16-Pin VQFN
• Auto-Skip Eco-mode for High Efficiency at Light Load