Typical applications include Internet audio players, remote access servers and other battery-operated systems. The TPS701xx sequencing control is pin programmable so that either output can be selected to be powered-up first with the other output being delayed until the first output reaches regulation. If the first or primary output falls out of regulation, the other output will be disabled until adequate input power becomes available to ensure predictable sequencing. The TSP701xx regulators also provide a unique combination of high performance with low power consumption. The device features a fast transient response that allows changes in processing load with an accuracy of within two percent over device load and temperature range.
Integrated functions serve to simplify power subsystem design and cut development time.
Other on-chip protection functions include undervoltage lockout and thermal shutdown protection. Power-up sequencing is probably the one, major, feature that will make this part so incredibly sellable. Added benefits include an open-drain SVS with 120 ms delay, a fast transiemt response, and a 190 mA quiescent current. This avoids the waste of energy in using a linear regulator to create a rail which is really just a voltage-dropped version of the higher one. But switching to dual systems means that some care must be taken into sequencing supplies correctly to avoid lockout, unreliability, or missed acquisitions in data systems.