LMR51603Y3DBVR

Voltage Regulators - DC DC Switching Regulators Overview

The LMR51603Y3DBVR is a synchronous buck converter from Texas Instruments, housed in an SOT-23-6 package. It supports an input voltage range of 4 V to 65 V and delivers up to 300 mA output current. The device provides adjustable output voltages between 800 mV and 28 V with a fixed switching frequency of 1.1 MHz. Operating temperatures span from -40°C to +150°C TJ, featuring a quiescent current of 38 µA and static current of 420 µA.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high efficiency in a compact footprint
• Fixed 1.1 MHz switching frequency enables the use of small external components
• Extended junction temperature rating supports operation in demanding thermal environments

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial control systems requiring wide input voltage ranges
• Point-of-load regulation for embedded processors
• Battery-powered equipment needing efficient step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix Y3 against official datasheets to confirm pinout and electrical characteristics match design requirements. Confirm RoHS compliance status through manufacturer documentation before integration. Ensure ESD handling protocols are followed during assembly due to the small SOT-23-6 package geometry.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 65 V is required alongside a compact SOT-23-6 form factor. It is suitable for applications prioritizing high switching frequencies to minimize passive component size. Consider thermal management strategies given the extended temperature rating and power dissipation limits in dense layouts.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMR51603 series of simple switcher regulators designed for space-constrained designs. It complements higher-current variants like the LMR51610 by offering a lower current capability in the same package family. The series targets industrial and consumer applications requiring reliable DC-DC conversion.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum operating junction temperature?

The maximum operating junction temperature is +150°C.

Does the device support shutdown functionality?

Yes, the LMR51603 includes a shutdown pin to disable the regulator and reduce quiescent current.