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The TPS65250RHAT features a three-channel synchronous wide input voltage range high-efficiency buck converter. These converters are designed to simplify application design while providing designers with the flexibility to optimise usage according to the target application.

The TPS65250RHAT converter operates in 5V, 9V, 12V, and 15V systems and integrates power transistors. The output voltage can be set to any value between 0.8V and the input voltage minus 1V using an external resistor divider. Each converter features an enable pin to enable delayed start-up for sequencing requirements; a soft-start pin allows adjustment of soft-start time by selecting a soft-start capacitor; and a current limit (RLIMx) pin enables designers to adjust current limit by selecting an external resistor and optimise inductor selection. The COMP pin can be optimised using a simple RC compensation circuit to balance transient response and DC accuracy.

Features of the TPS65250RHAT

Wide input voltage range (4.5 V to 18 V)

0.8 V, 1% accuracy reference voltage

Continuous load: 3 A (Buck 1), 2 A (Buck 2 and 3)

Maximum current: 3.5 A (Buck 1), 2.5 A (Buck 2 and 3)

Adjustable switching frequency  

300 kHz - 2.2 MHz set by external resistor  

External synchronisation pin for oscillator  

External enable/sequence and soft-start pins  

Adjustable current limit set by external resistor  

Soft-start pin  

Current-mode control with simple compensation circuit  

Power-good and reset generator  

Storage and release circuit optimised to reduce storage  

Capacitance in end-of-life mode (optional)

Low-power mode set by external signal

QFN package, 40 pins, 6 mm x 6 mm (RHA)

Applications for the TPS65250RHAT

xDSL/xPON modems

Cable modems

Power line modems

Home gateways and access point networks

Wireless routers

Set-top boxes

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