LTC3859ALIFE

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The LTC3859A is a high-performance, high-efficiency synchronous dual-output switching controller, operating over a wide input voltage range of 3.6V to 36V for factory automation, process control, and scientific instrumentation. With its high switching frequency, it offers a design-friendly solution for dual-output, isolated and non-isolated, step-up (Monte Carlo) or step-down (buck-boost) applications. It has two internal track/hold circuits to optimize maximum and minimum output voltage, current or power levels.

The LTC3859A can be configured as either a single-output or dual-output voltage, current or power DCDC controller. It operates over a wide input voltage range and can provide up to 0.8A of output current in each output. The maximum current limit can be further configured and adjusted with external components. The device also supports external or internal current sensing, which helps to maintain reliable, efficient operation.

The LTC3859A features an active output voltage sequencing capability that enables the system to sequence multiple outputs from multiple controllers. The device is capable of providing up to 6V of output voltage, with a voltage accuracy of 1% and a maximum switching frequency of 2.4MHz. The LTC3859A offers a wide range of programmable functions, including maximum duty cycle control, output voltage tracking/adjustment and current mode control.

The LTC3859A is well suited for many DCDC switching controller applications, including distributed power systems, telecommunications equipment, automotive applications, and lighting control. The device integrates a range of features to improve efficiency and reduce the external component count. These features include current mode control, active output voltage sequencing, spread spectrum modulation, under-voltage lockout, over-voltage protection, output frequency dithering, and thermal shutdown.

The LTC3859A also supports a wide range of operating modes, including fixed or variable frequency, variable frequency spread spectrum control, and variable frequency peak current mode control. The device has an adjustable operating temperature range of -40°C to +125°C. It also offers an adjustment latch that allows the user to adjust the output voltage under power-up conditions.

In summary, the LTC3859A is a high-performance, high-efficiency synchronous dual-output switching controller, capable of providing up to 0.8A of output current in each output, and it can be programmed to offer a range of functions, including current mode control, active output voltage sequencing, spread spectrum modulation, and under-voltage lockout. With its wide input voltage range and adjustable temperature range, the LTC3859A is well suited for many DCDC switching controller applications.

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