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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftps62912″>View Datasheet
Texas Instruments TPS6291x Buck Converters are high-efficiency, low noise, and low ripple current mode synchronous buck converters. The devices are ideal for noise-sensitive applications that would normally use an LDO for post-regulation, such as high-speed ADCs, clock and jitter cleaner, serializer, de-serializer, and radar applications. The devices operate at a fixed switching frequency of 2.2MHz or 1MHz and can be synchronized to an external clock. The Texas Instruments TPS6291x devices have an output current of 2A (TPS62912) or 3A (TPS62913).
To further reduce the output voltage ripple, the device integrates loop compensation to operate with an optional second-stage ferrite bead L-C filter. This feature allows an output voltage ripple below 10µVRMS. Low-frequency noise levels, similar to a low-noise LDO, are achieved by filtering the internal voltage reference with a capacitor connected to the NR/SS pin. The optional spread spectrum modulation scheme spreads the DC/DC switching frequency over a wider span, which lowers the mixing spurs.
