The Texas Instruments TPS62851x are a family of pin-to-pin 0.5A, 1A, 2A (continuous) and 3A (peak) high efficiency, easy-to-use, synchronous step-down DC-DC converters. They are based on peak current mode control topology. Housed in an 8-pin 1.6mm × 2.1mm SOT583 package, this series provides a high power density solution.
Low resistance switches allow up to 2A continuous output current and 3A peak current. The switching frequency is fixed internally at 2.25MHz and can also be synchronized with an external clock from 1.8MHz to 4MHz. In PWM/PFM mode, the series automatically enters power saving mode at light loads, maintaining high efficiency over the entire load range. It provides 1% output voltage accuracy in PWM mode, which helps to design power supplies with high output voltage accuracy. The SS/TR pin allows setting the startup time or tracking the output voltage to an external source, which allows external sequencing of different supply rails and limits inrush current during startup.
