Datasheet for the Texas Instruments TPS51216, a synchronous buck controller with an LDO and buffered reference, designed to power DDR3 and DDR3L memory rails, including VDDQ, VTT and VTTREF. In laptops it commonly generates the RAM supply, so it is a key reference when a board shows no memory voltage or a short on the DDR rail. The 770 KB PDF gives pinout, enable and power-good logic, typical application circuits and electrical limits, helpful for checking S3/S5 control signals and expected output levels.
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