LT3790MPFE#PBF

Overview

The LT3790MPFE#PBF is a synchronous four-switch buck-boost voltage and current regulator controller manufactured by Analog Devices. It operates with an input voltage range of 4.7V to 60V and supports switching frequencies between 200kHz and 700kHz. The device features spread spectrum modulation to reduce EMI. It is housed in a 38-pin TSSOP-EP package and is rated for operation temperatures from -55°C to +150°C. This controller manages both step-down and step-up topologies efficiently.

Feature Summary

• Synchronous four-switch architecture for efficient buck-boost regulation
• Integrated spread spectrum modulation for electromagnetic interference reduction
• Capable of regulating both output voltage and output current
• Wide operating temperature range suitable for harsh environments

Applications

• Industrial power supplies requiring wide input ranges
• Battery-powered systems with varying charge states
• Automotive electronics subject to load dump conditions
• LED drivers needing constant current regulation

Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when reviewing distributor listings. Confirm that the MP grade meets the required extended temperature specifications for your application. Check current availability status as industrial-grade components may have limited stock or long lead times depending on the manufacturer's production schedule.

Selection Notes

Select this component when a wide input voltage range up to 60V is required alongside buck-boost capability. Ensure the design accounts for the 38-pin TSSOP-EP thermal pad requirements for adequate heat dissipation. Compare against standard LT3790 variants if spread spectrum features are not needed, noting that the MP version offers enhanced reliability for demanding applications.

Part Context

This part belongs to the LT3790 family of synchronous buck-boost controllers. It shares architectural similarities with the LT3791 but differs in control loop configurations. The MP designation signifies military/industrial grade performance compared to commercial variants. It complements evaluation boards like the DC2123B for rapid prototyping and validation of high-power designs.

Replacement Considerations

The LT3790EFE is a commercial grade alternative within the same family. The LT3791 series offers similar topology but may require different external component values. Verify pin compatibility and thermal performance when substituting. Always consult the latest datasheets to ensure functional equivalence regarding switching frequency and control logic.