Milpitas, Calif.Linear Technology Corp. has introduced the LTC3890/-1, a high voltage dual output synchronous step-down DC/DC controller that draws only 50µA when one output is active and 60µA when both outputs are enabled.
With both outputs shut down, the LTC3890/-1 draws a mere 14µA. The 4V to 60V input supply range is designed to protect against high voltage transients, continue operation during automotive cold crank and cover a broad range of input sources and battery chemistries. Each output can be set from 0.8V to 24V at output currents up to 20 amps with efficiencies as high as 95%, making it well suited for 12V or 24V automotive, heavy equipment, industrial control, robotics and telecom applications.
The LTC3890/-1 has powerful 1.1Ohm on-chip MOSFET gate drivers. It operates with a selectable fixed frequency between 50kHz and 900kHz, and can be synchronized to an external clock from 75kHz to 850kHz with its phased-locked loop (PLL). The user can select from continuous operation, pulse skipping and low ripple Burst Mode operation during light loads.
The LTC3890 is available in a 32-lead 5mm x 5mm QFN package and the LTC3890-1 is housed in a 28-pin SSOP package.
Pricing: Starts at $4.76 each in 1,000-piece quantities.
Datasheet: Click here.
Linear Technology, www.linear.com