The TPS65266-1 incorporates 3 channels of high-efficiency synchronous buck converter for
applications operating off the adaptor or battery with input voltage lower than 6 V.
The buck DC/DC converter integrates power MOSFETs for optimized power efficiency and
reduces external component counts. The peak current mode control simplifies the compensation and
fast transient response. High clock frequency allows smaller and low-value inductors and
capacitors. External compensation supports optimized loop compensation and fast transient response.
In light load condition, the buck converter operates in PSM mode for a reduction on the input power
supplied to the system. Cycle-by-cycle overcurrent limiting with hiccup mode limits MOSFET power
dissipation in short circuit or overloading fault conditions.
The TPS65266-1 features a power-good supervisor circuit that monitors all converter
outputs. The PGOOD pin is asserted after the output voltages in each channel are in regulation and
sequencing is done.
When continuous heavy overload or short circuit increases power dissipation in the buck
converter, internal thermal protection circuit shuts off the device to prevent damage. Recovery
from a thermal shutdown is automatic after the device has cooled sufficiently.
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