LTC3541EDD-2#TRPBF

Overview

The LTC3541EDD-2#TRPBF is a high-efficiency power management IC from Analog Devices, integrating a synchronous buck converter and a very low dropout (VLDO) regulator. It operates within an input voltage range of 2.7 V to 5.5 V. The buck converter provides an adjustable output voltage between 0.6 V and 5.5 V with a maximum current of 500 mA. The VLDO offers a fixed 1.8 V output at 50 mA. The device features a 2.25 MHz switching frequency and operates over a temperature range of -40°C to +85°C. It is housed in a compact 10-lead DFN package.

Feature Summary

• Integrates a high-efficiency synchronous buck converter and a separate VLDO regulator in a single package
• Supports wide input voltage ranges suitable for single-cell lithium-ion battery applications
• Features a fixed-frequency architecture that allows for the use of small external inductors and capacitors

Applications

• Portable electronics powered by single-cell lithium-ion batteries
• Cellular phones and personal digital assistants
• Handheld instruments requiring efficient power conversion
• Battery-powered consumer devices

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the -2 suffix corresponds to the correct fixed LDO output voltage variant required for your design. Check current availability status as supply constraints may affect lead times. Ensure the operating temperature range meets your environmental requirements.

Selection Notes

Select this component when space is limited and both an adjustable main rail and a fixed auxiliary rail are needed. Compare quiescent current specifications against other PMICs if battery life is critical. Ensure the thermal performance of the DFN-10 package suits your PCB layout and ambient conditions. Verify that the 500mA buck current rating exceeds your peak load demands.

Part Context

This part belongs to the LTC3541 family of dual-output regulators. The -2 suffix typically denotes a specific fixed output voltage for the LDO section, distinguishing it from other variants like the -3 which may have different LDO outputs. It is designed to replace discrete solutions, reducing board area and component count in portable designs.

Replacement Considerations

Check for direct pin-compatible alternatives within the Analog Devices portfolio that offer similar electrical characteristics. Verify that any substitute maintains the same package dimensions and thermal properties. Ensure the replacement supports the required input voltage range and output currents.