TPS61040DBVRG4

Overview

The TPS61040DBVRG4 is a synchronous boost converter from Texas Instruments designed for LCD bias and LED backlight supplies. It operates with an input voltage range of 1.8V to 6V, providing a maximum output current of 400mA and a maximum output voltage of 28V. The device features a fixed switching frequency of 1MHz and low quiescent current of 28µA. It is housed in a compact SOT-23-5 package, suitable for surface mount applications across a temperature range of -40°C to +85°C.

Feature Summary

• Synchronous boost topology ensures high efficiency for small to medium power applications
• Integrated 1MHz switching frequency allows for the use of small passive components
• Low quiescent current supports extended battery life in portable devices

Applications

• LCD bias supply for mobile phones and handheld devices
• White LED backlight driver circuits
• Portable electronic equipment requiring step-up conversion

Procurement Notes

Verify component availability as this specific suffix may indicate an obsolete status or specific manufacturing lot. Confirm RoHS compliance details directly with the manufacturer or authorized distributors before finalizing procurement plans. Ensure the ordering suffix matches the required package and tape/reel specifications for your assembly line.

Selection Notes

Select this component when a compact solution is needed for boosting single-cell lithium-ion battery voltages to drive displays or LEDs. Consider the 400mA output limit and 1MHz frequency requirements. Compare against non-synchronous alternatives if cost is critical, though efficiency may be lower. Ensure external inductor selection aligns with the internal switch current limits.

Part Context

This part belongs to the TPS6104x family of high-frequency boost converters. The TPS61040 variant typically offers higher output current capabilities compared to the TPS61041. Both are optimized for portable applications where space and power consumption are primary constraints. The DBVRG4 suffix denotes the SOT-23-5 package and lead-free/RoHS compliant construction.

Replacement Considerations

Direct substitutes include the TPS61040DRVR (WSON-6 package) and the TPS61041DBVR (lower current variant). Verify pinout compatibility and thermal performance when transitioning between SOT-23-5 and WSON-6 packages. Check datasheet revisions for any functional updates in newer generations.