TI Introduces 30A, 15V Synchronous Buck Converter with 90% Efficiency

Texas Instruments Inc. (TI) introduced a synchronous 30A step-down regulator with integrated MOSFETs that achieves 90-percent power efficiency and fast transient response in a small 5 x 6-mm PowerStack QFN package. The TPS53355 converter delivers high performance to low-output voltage, high-current applications that demand increased power density, such as notebook computers, embedded computers, servers, storage and telecommunication systems.

The TPS53355 30A regulator uses a D-CAP™ mode control feature to achieve a transient response of up to 2A/µs, which is 20-percent faster than other solutions that use current or voltage mode control. The D-CAP mode control also minimizes the use of external components and requires no loop compensation.

Key features and benefits of the TPS53355 include: high efficiency and performance: input voltage range up to 15 V; 90-percent efficiency at 30-A, 12 Vin, 1.5Vout at 500 kHz; accurate power delivery: 1 percent voltage regulation accuracy; light-load efficiency: Eco-Mode(TM) auto-skip mode operation; selectable switching frequency range of 250 kHz to 1 MHz and small QFN package with integrated high and low-side FET are said to result in a 20-percent smaller solution than competitive products.

The TPS53355 is available in volume now in a 22-pin, 5 x 6-mm QFN PowerStack™ package, which the company describes as a unique package technology that helps reduce board space, while achieving excellent thermal performance, higher current capability and efficiency. Suggested resale pricing is $4.65 in 1,000-unit quantities.