It is designed to support a wide input voltage range.

Analog Devices announced the release of the new Power by Linea LTC7810, a high-voltage, non-isolated, dual-output synchronous step-down DC/DC controller that drives an external N-channel MOSFET.

The new product is designed to support a wide input voltage range of 4.5V to 140V (150V abs max), so it can operate from high input voltages or inputs capable of generating high voltage surges, eliminating the need for an external surge suppression device.

The LTC7810 can operate with a duty cycle of up to 100% under conditions where the input voltage drops to 4.1V, making it ideal for transportation, industrial, robotics, and data communication applications.

The output can be set within the range of 1V to 60V with a maximum of 20A per channel and an efficiency of up to 96%. The new product is suitable for always-on systems as it consumes 16µA in sleep mode when each output is controlled to 12V and 3.3V from a 48V input.

The internal charge pump enables 100% duty cycle operation even during dropout, which is useful when power needs to be drawn from a discharging battery. Optional spread spectrum technology reduces radiated and conducted noise emissions. The LTC7810's powerful 1Ω N-channel MOSFET gate driver can be adjusted to 6V, 8V, or 10V to allow the use of logic level or standard threshold MOSFETs to maximize efficiency.

To prevent high on-chip power consumption in high input voltage applications, the LTC7810 can drive the gate of an optional external N-channel MOSFET. This MOSFET functions as a low dropout linear regulator to power the IC.

The LTC7810 can also be powered from the output of a switching regulator or another available source via the EXTVCC pin, which can reduce power consumption and increase efficiency.

The LTC7810 can operate at a selected fixed frequency within the range of 50 kHz to 750 kHz and can be synchronized to an external clock between 75 kHz and 720 kHz. Users can select between forced continuous mode, pulse-skipping mode, or low-ripple Burst Mode® operation during light loads. The current mode architecture provides features such as easy loop compensation, fast transient response, and excellent line regulation.

Current sensing is enabled by detecting a voltage drop in the output inductor (DCR) or using an optional sense resistor to achieve maximum efficiency. With a low minimum on-time of 90ns, a high step-down ratio is possible at high switching frequencies. Current foldback limits heat dissipation from the MOSFET during overload conditions. Additionally, it provides adjustable input overvoltage lockout (OVLO) and soft-start functions.