20V/20A Buck Regulator Cuts EMI, Boosts Power Density

The LTC7150S 20V/20A monolithic synchronous buck converter features differential VOUT remote sensing and phase-lockable, controlled on-time constant frequency current mode architecture. The device employs Silent Switcher2 technology and multiphase operation with up to 12 phases, providing the capability to directly parallel multiple devices for higher current with minimal increase in input and output capacitance. Its 3.1V to 20V input range supports a wide variety of applications, including most intermediate bus voltages, and is compatible with many battery types. Integrated N-channel MOSFETs deliver continuous load currents as high as 20A with minimal thermal derating, at output voltages ranging from 0.6V to VIN.

 

The device’s 25-ns minimum on-time allows for a high step-down ratio power supply at high frequencies supporting both forced continuous and discontinuous mode operation. Operating frequency is selectable from 400 kHz to 3 MHz and can be synchronized to an external clock. The LTC7150S’s total differential output voltage accuracy is ±1% over the –40°C to 125°C operating junction temperature range. Additional features include differential remote VOUT sensing directly at the load, PHMODE phase selector pin, accurate 1.2V RUN pin threshold, VIN overvoltage protection, power good and programmable soft-start/tracking.

 

The LTC7150S is available in a 42-lead 5 mm x 6 mm x 1.3 mm BGA package, in both RoHS lead-free and leaded SnPb (63/37) finishes. The E and I grades are specified from –40°C to +125°C operating junction temperature range. Price starts at $5.60 each/1,000 for the E grade. A datasheet is available.

 

Analog Devices Inc.

Norwood, MA

800-445-2564

781-329-4700

http://www.analog.com

 

Linear Technology Corp.

Milpitas, CA.

800-454-6327

http://www.linear.com

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