Rated at 1.2A, 55V, Linear Technology Corp.'s LT3991 step-down switching regulator has an integrated boost diode, and features a Burst Mode operation that keeps quiescent current under 2.8µA in no load standby conditions.
The LT3991's 4.3V to 55V input voltage range makes it ideal for automotive and industrial applications. Its internal 1.7A switch can deliver up to 1.2A of continuous output current to voltages as low as 1.19V. The LT3991's Burst Mode operation offers ultralow quiescent current, making it well suited for applications such as automotive or industrial systems that demand always-on operation and optimum battery life.
Switching frequency is user programmable from 200kHz to 2MHz, enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its 10-lead 3x3mm DFN or thermally enhanced MSOP packages and high switching frequency keep external inductors and capacitors small, providing a compact, thermally efficient footprint.
Linear Technology's LT3991 Step-down Regulator
Linear Technology
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