LTC3810EUH-5#PBF

DC DC Switching Controllers Overview

The LTC3810EUH-5#PBF is a synchronous step-down switching regulator controller from Analog Devices, designed for high-voltage applications. It operates with an input voltage range of 4.5V to 60V and delivers up to 10A output current. The device utilizes a constant on-time valley current mode architecture, enabling low duty cycle operation and fast transient response without requiring a sense resistor. It features a 0.8V reference voltage, adjustable switching frequency, and integrated power good indicators. Packaged in a 38-pin QFN, it supports shutdown modes and offers thermal protection.

DC DC Switching Controllers Feature Summary

• Constant on-time valley current mode control architecture for precise regulation
• Synchronous buck topology supporting high input voltages up to 60V
• Integrated soft-start and power good status monitoring functions
• Thermal foldback protection to limit MOSFET dissipation during faults

DC DC Switching Controllers Applications

• Distributed DC power systems
• Telecommunications equipment
• Automotive always-on systems
• Battery-operated digital devices

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'EUH-5' against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure the package type matches the target PCB footprint. Check for RoHS compliance documentation as required by regional regulations. Confirm availability status directly with authorized distributors due to potential supply constraints.

DC DC Switching Controllers Selection Notes

Select this component when designing high-voltage synchronous buck converters requiring robust transient response. The constant on-time architecture simplifies compensation compared to fixed-frequency PWM controllers. Consider the 60V maximum input rating for automotive or telecom bus applications. Evaluate thermal performance at full load currents to ensure adequate heat dissipation through the exposed pad.

DC DC Switching Controllers Part Context

This part belongs to the LTC3810 family of high-efficiency synchronous step-down regulators. It is functionally similar to the LTC3810EG but housed in a QFN package suitable for surface mount assembly. The EUH-5 designation indicates a specific temperature grade and packaging configuration within the Analog Devices portfolio.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include other members of the LTC3810 family such as the LTC3810IG or LTC3810IUH variants, provided the package and temperature range requirements are met. Cross-reference pinouts carefully as package differences may exist between SSOP and QFN versions.

DC DC Switching Controllers FAQ

Does the LTC3810EUH-5 require an external sense resistor?

No, the device uses a constant on-time valley current mode architecture that provides accurate cycle-by-cycle current limiting without an external sense resistor.

What is the minimum operating input voltage?

The minimum operating input voltage is 4.5V.

How is the switching frequency determined?

The switching frequency is externally programmable via a resistor connected to the FREQ pin.