Power

Texas Instruments – Integrated triple-output synchronous buck converters are small and efficient (TPS65261 / TPS65262)

Aug 1 2014 - Power [More Power Articles]

With a smaller footprint and higher efficiency, Texas Instruments has unveiled the next generation of its integrated triple-output synchronous step-down switching regulators.

The TPS65261 and TPS65262 DC-DC converters feature small QFN packages and up to 96 percent efficiency for such applications as digital television, set-top boxes, home gateway and access point networks, wireless routers, point-of-sale machines, and surveillance equipment.

The new family of DC-DC converters joins TI’s family of multi-channel synchronous buck converters that include the TPS65250 and the TPS65251 developed for set-top box applications.

Key features and benefits: 1 – Wide 4.5-V to 18-V input supply voltage range for intermediate bus voltages operating off 5-V, 9-V, 12-V or 15-V power buses or batteries. 2 – Constant frequency peak current mode simplifies design and enables system optimization. 3 – 5mm by 5-mm by 0.9-mm QFN package is 44 percent smaller than previous generation. 4 – 0.6-V feedback reference supports processors demanding lower output voltage. 5 – Integrated automatic power up/down sequencing offers easy power control. 6 – The TPS65261 provides 82 percent light load efficiency at 10 mA and offers three outputs of rated current at 3A/2A/2A. It features an adjustable 250-kHz to 2-MHz switching frequency with pulse skipping. For forced continuous current operation without pulse skipping, TI offers the TPS65261-1. 7 – The TPS65262 provides fixed 600-kHz switching operation and offers three outputs of rated current at 3A/1A/1A. Two integrated 200-mA and 100-mA low drop-out voltage linear regulators (LDOs) simplify board layout. For digital multi-media applications requiring higher current, TI offers the TPS65262-1 with integrated 350-mA and 150-mA LDOs.

The triple synchronous converters are housed in a 32-pin QFN package. Evaluation modules are available for both devices.

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