Analog Devices Inc. LT8210 Synchronous Buck‑Boost DC/DC Controllers

Analog Devices LT8210 Synchronous 4-Switch Buck‑Boost DC/DC Controllers operate in pass-through, forced continuous, pulse-skipping, and Burst Mode® operations. Buck–boost DC-to-DC converters have an output voltage magnitude that is either greater than or less than the input voltage magnitude. Pass-through is a feature that passes the input directly to the output when the input is within a user programmable window. Pass-through mode eliminates switching losses and electromagnetic interference (EMI) along with maximizing efficiency. Analog Devices LT8210 buck-boost controllers include a precision current sense amplifier that can accurately monitor and limit output or input average current.

Features

Pin-selectable pass-through or fixed output CCM, DCM, Burst Mode® operation
Programmable non-switching pass-through window
18μa pass-through mode IQ with 99.9% efficiency
2.8V to 100V (4.5V for start-up) V_IN range
1V to 100V V_OUT range
1.4uA, 1.9uA operating supply current
Reverse input protection to –40V
10V quad nN-channel MOSFET gate drivers

EXTV_CC LDO powers drivers from V_OUT/external rail
±20% cycle-by-cycle inductor current limit
80kHz to 400kHz fixed/phase-lockable frequency
No top MOSFET refresh noise in buck or boost
Spread spectrum frequency modulation for low EMI
Power good output voltage/overcurrent monitor
-40°C to +125°C operating temperature range
Available in a 38-lead TSSOP package

Applications

Automotive, industrial, telecom, avionics systems
Automotive start-stop, emergency call applications
ISO 7637, ISO 16750, MIL-1275, DO-160 applications

Additional Resources

Eliminate Switching Noise with 4-Switch Buck-Boost Controller with Pass-Thru Capability

There are several dc-to-dc converter topologies that can perform both step-up and step-down operations, from SEPIC to 4-switch topologies, but none of these solutions pass the input voltage directly to the output without actively switching — until now, that is.

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