DC/DC controller generates positive or negative regulated voltages

DC/DC controller generates positive or negative regulated voltages

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By eeNews Europe

The LT3759 has two voltage feedback error amplifiers and reference voltages. One set is for positive output voltages, the other is for negative output voltages, both off a single feedback pin, making the LT3759 a versatile DC/DC controller for many types of power supply designs.

The LT3759 operates over an input voltage range from 1.6 V to 42 V and is well suited for industrial, automotive, medical and telecom applications. With a programmable and synchronizable operating frequency from 100 kHz to 1MHz, designers can choose a wide range of inductors and capacitors to optimize size, performance and cost. The fixed frequency, current-mode control architecture results in stable operation over a wide range of supply and output voltages, and the use of all ceramic capacitors, enables a smaller solution size.

The LT3759 drives an external N-channel MOSFET from an internally regulated 4.75 V supply. Additional features include programmable soft-start, an accurate 50mV current sense threshold, programmable undervoltage lockout with hysteresis, and a power good signal along with output overvoltage and overcurrent protection.

Availability and Pricing

The LT3759 is available in a thermally enhanced MSOP-12 package with extended and industrial operating junction temperature ranges from -40 to 125°C while the H-grade version operates over a -40°C to 150°C junction temperature range.The 1000-piece price starts at $2.35 each.

More information about the LT3759 DC/DC controller at 

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