LTC3541EDD-1#TRPBF

Overview

The LTC3541EDD-1#TRPBF is a high-efficiency synchronous buck converter and very low dropout (VLDO) regulator manufactured by Analog Devices Inc. It integrates a 500mA buck converter and a 300mA VLDO in a compact DFN-10 package. The device operates from an input voltage range of 2.7V to 5.5V with a fixed switching frequency of 2.25MHz. The buck output is adjustable, while the VLDO provides a fixed 1.8V output. Quiescent current is typically 285µA, supporting operation temperatures from -40°C to +85°C.

Feature Summary

• Integrates a high-efficiency synchronous buck converter with a separate very low dropout linear regulator within a single compact package.
• Features a fixed 2.25MHz switching frequency that enables the use of small surface-mount inductors and capacitors for space-constrained designs.
• Incorporates a shutdown pin to minimize power consumption during standby modes.

Applications

• Battery-powered portable electronic devices requiring efficient dual-rail power management
• Embedded systems utilizing microprocessors or memory components needing stable 1.8V logic supplies
• Industrial control modules operating within standard industrial temperature ranges

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the manufacturer is Analog Devices Inc. to ensure component authenticity. Check RoHS compliance status as required by project specifications. Validate the DFN-10 footprint compatibility against PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a design requires both a programmable buck rail and a fixed 1.8V LDO rail from a single 3.3V or 5V source. The integrated topology reduces bill-of-materials count compared to discrete solutions. Ensure the 500mA buck and 300mA LDO current ratings sufficiently cover the peak load requirements of the target application circuitry.

Part Context

This part belongs to the LTC3541 family of mixed-signal power management ICs designed for efficiency and size reduction. It serves as a solution for applications needing multiple regulated voltages from a single input source without requiring complex external controller circuits. The device simplifies power architecture in compact consumer and industrial electronics.

Replacement Considerations

The LTC3541EDD-1#PBF is the tube-packaged equivalent of this reel-part. Verify if the functional specifications match exactly before substituting based on packaging preferences alone.

FAQ

What is the fixed output voltage of the integrated VLDO?

The VLDO section provides a fixed 1.8V output capable of delivering up to 300mA.

Can the buck converter output voltage be adjusted?

Yes, the buck converter output voltage is adjustable via external feedback resistors.