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Highly Efficient, Dual Synchronous Buck Converter Evaluation Module

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Texas Instruments TPS51124EVM-001

The TPS51124EVM-001 is designed to asist in the evaluation of the TPS51124, a dual, adaptive on-time D-CAP™ mode synchronous buck controller.

The part enables system designers to cost effectively complete the suite of notebook power bus regulators with the absolute lowest external component count and lowest standby consumption. The fixed frequency emulated adaptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency operation at light load for high efficiency down to milliampere range. The main control loop for the TPS51124 uses the D-CAP mode that optimized for low ESR output capacitors such as POSCAP or SP-CAP promises fast transient response with no external compensation. Simple and separate power good signals for each channel allow flexibility of power sequencing.

The TPS51124 provides a convenient and efficient operation with supply input voltages (V5IN, V5FILT) ranging from 4.5 V to 5.5 V, conversion voltages (Drain voltage for the synchronous high-side MOSFET) from 3 V to 28 V and output voltages from 0.76 V to 5.5 V. HPA178 (TPS51124EVM) evaluation module is a high efficiency, dual synchronous buck converter providing 1.05 V at 10 A and 1.5 V at 10 A from 5 V to 25 V input. This user's guide describes the HPA178 performance in medium switching frequency.

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