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Linear Technology Corporation has unveiled a high input voltage DC/DC controller for boost, flyback, SEPIC and inverting power supply applications, capable of generating either positive or negative regulated output voltages.
The LT3758 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 LT3758 a versatile DC/DC controller for many types of power supply designs.
The LT3758 operates from a wide input voltage range from 5.5 V to 100 V, which is ideal for surviving high input voltage transients. This device can achieve efficiencies up to 96 percent and is well suited for harsh industrial, automotive, medical and telecom applications. With a programmable fixed or synchronizable operating frequency from 100 kHz to 1 MHz, designers can choose a wide range of inductors and capacitors to optimize size, performance and cost. The fixed frequency, current-mode control results in stable operation over a wide range of supply and output voltages, along with all ceramic capacitor designs, enabling a smaller solution size.
The LT3758 drives an external N-channel MOSFET from an internally regulated 7.2 V supply. Programmable soft-start enables control of the output voltage turn-on time. In addition, the LT3758 features a programmable input undervoltage lockout with hysteresis, along with output overvoltage and overcurrent protection.
The LT3758 is offered in thermally enhanced MSOP-10 and 3 mm x 3 mm DFN-10 packages, both with extended and industrial temperature ranges from -40 to 125 degrees C.
Availability
The 1000-piece price starts at $2.35 each.
Datasheet:
LT3758
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