TPS543B20RVFR

The TPS543B20 uses an internally compensated emulated peak current mode control scheme with a clock-synchronizable fixed-frequency modulator for EMI-sensitive POL applications. An internal integrator and direct-amplifying ramp tracking loop eliminate the need for external compensation over a wide frequency range, enabling flexible, dense, and simple system designs. Optional API and body braking features help improve transient performance by significantly reducing undershoot and overshoot, respectively. Integrated NexFET MOSFETs with low-loss switching characteristics help improve efficiency and deliver up to 25A of output current in a 5mm×7mm PowerStack package with a layout-friendly thermal pad. Two TPS543B20 devices can be stacked together to provide up to 50A at the point of load.

Applications

• Wireless and wired communication infrastructure equipment
• Enterprise servers, switches, and routers
• Enterprise-class storage, SSD
• ASIC, SoC, FPGA, DSP core and I/O power rails

Key features

• Internally compensated advanced current mode control 25A POL
• Input voltage range: 4V to 19V
• Output voltage range: 0.6V to 5.5V
• Integrated 4.1/1.9mΩ stacked NexFET power stage with lossless low-side current sensing
• Fixed frequency — synchronizable to external clock and/or sync output
• Pin-strap programmable switching frequency: 300kHz to 2MHz in standalone mode, 300kHz to 1MHz in stacked mode
• Up to 50A load via dual stacking with current sharing, voltage sharing, and CLK synchronization
• Pin-strap programmable reference voltage: 0.6V to 1.1V with 0.5% accuracy
• Differential remote sense
• Safe start-up into pre-biased output voltage
• High-accuracy hiccup current limiting
• Asynchronous Pulse Injection (API) and body braking
• 40-pin 5mm×7mm LQFN package with 0.5mm pitch and single thermal pad
• Create custom designs using TPS543B20 with WEBENCH Power Designer