The TPS53511 is an adaptive on-time D-CAP2? mode synchronous buck converter. The device is suitable for points-of-load (POL) in computing power systems, and provides a cost-effective, low component count, low standby current solution. The main control loop for the TPS53511 uses the D-CAP2? mode control providing a fast transient response with no external components. The adaptive on-time control supports seamless operation between PWM mode during heavy load conditions and reduced frequency operation during light load conditions for high efficiency.

The TPS53511 includes a proprietary circuit that enables the device to adapt 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 supply input, and from 2-V to 18-V input power supply voltage. The device features an adjustable slow start time and a power good function. It also supports pre-biased soft start. The TPS53511 is available in the 16-pin QFN

• Continuous 1.5-A Output Current
• 4.5-V to 18-V Supply Voltage Range
• 2-V to 18-V Conversion Voltage Range
• DCAP2 Mode Control Enables Fast Transient Response
• Low Output Ripple and Support all MLCC Output Capacitor
• Skip Mode for Light Load Control
• Highly Efficient Integrated FETs Optimized for Lower Duty Cycle Applications
• High Efficiency, Less than 10-μA Supply Current at Shutdown
• Adjustable Soft-Start Time
• Support Pre-Biased Soft Start
• 700-kHz Switching Frequency
• Cycle-By-Cycle Overcurrent Limit
• Open Drain Power Good Indication
• Internal Bootstrap Switch
• Small 3 mm × 3 mm, 16-Pin QFN (RGT) Package