TPS65266RHBT

The TPS65266 integrates three high-efficiency synchronous buck converters, designed for applications powered by adapters or batteries with input voltages below 6.5V. The DC/DC buck converters integrate power MOSFETs to optimize power efficiency and reduce the number of external components. Peak current mode simplifies compensation and provides fast transient response. The high switching frequency allows the use of smaller, lower-value inductors and capacitors. External compensation supports optimized loop compensation and fast transient response. Under light-load conditions, FCC mode buck converters reduce noise sensitivity and RF interference. In the event of short-circuit or overload fault conditions, discontinuous mode cycle-by-cycle current limiting restricts MOSFET power dissipation. The TPS65266 features a power-good monitoring circuit that monitors all converter outputs. Once the output voltage of each channel is regulated and sequencing is complete, the PGOOD pin is asserted. If power dissipation increases in a buck converter due to sustained severe overload or short-circuit conditions, the internal thermal protection circuit shuts down the device to prevent damage. Once the device has cooled sufficiently, it automatically recovers from thermal shutdown.

Applications

• Printers and scanners
• Digital TVs
• Set-top boxes
• Home gateways and access points
• Network security monitoring

Key features

• Operating input voltage range: 2.7V to 6.5V
• Feedback reference voltage 0.6V ±1%
• Maximum continuous output current 3A/2A/2A
• Dedicated enable and soft-start
• Enable pin discharge support for precise startup timing control
• Forced continuous current (FCC) mode under light-load conditions
• Periodic current-limiting overload protection in discontinuous mode
• Adjustable clock frequency range: 250kHz to 2.4MHz
• External clock synchronization
• Power good indicator
• Overtemperature protection