TPS61040QDBVRQ1

Overview

The TPS61040QDBVRQ1 is an automotive-grade, low-power DC-DC boost converter designed for small to medium LCD bias supplies and white LED backlight applications. It operates with a wide input voltage range of 1.8 V to 6 V and provides a regulated output voltage adjustable from 1.8 V to 28 V. The device delivers up to 400 mA of output current while maintaining a typical quiescent current of 28 µA. Operating at a fixed switching frequency of 1 MHz, it ensures efficient power conversion in a compact SOT-23-5 package. Qualified under AEC-Q100 standards, it supports junction temperatures ranging from -40°C to +125°C.

Feature Summary

• Integrated high-frequency boost topology optimized for space-constrained automotive designs
• Wide input voltage compatibility supporting single-cell lithium-ion or multi-cell battery configurations
• Low quiescent current operation enhances system efficiency during standby modes
• Automotive qualification ensures reliability under harsh thermal and electrical conditions

Applications

• White LED backlight drivers for automotive displays
• LCD bias voltage generation for instrument clusters
• General step-up power supply for automotive sensor modules
• Battery-powered automotive subsystems requiring regulated higher voltages

Procurement Notes

Verify the complete part number including suffixes to ensure correct packaging and temperature grade. Confirm AEC-Q100 qualification status if automotive compliance is required. Check datasheet revisions for any updates to pinout or electrical characteristics. Ensure ordering documentation matches the specific SOT-23-5 variant intended for surface mount assembly.

Selection Notes

Select this component when designing systems requiring a compact boost solution with low standby current. It is suitable for inputs starting at 1.8 V, making it compatible with partially discharged batteries. Consider the 1 MHz switching frequency for smaller external passive components compared to lower-frequency alternatives. Evaluate thermal performance within the specified -40°C to +125°C operating range for automotive environments.

Part Context

This device belongs to the TPS6104x family of low-power boost converters manufactured by Texas Instruments. The Q1 suffix indicates automotive qualification, distinguishing it from commercial variants like the TPS61040. It shares functional similarities with other members of the series but may differ in specific electrical tolerances or packaging options. The family is targeted at portable and automotive applications needing efficient voltage step-up in minimal footprints.

Replacement Considerations

Direct substitutes include other AEC-Q100 qualified boost converters from Texas Instruments such as the TPS61041-Q1, provided input/output specifications align. Cross-reference pinouts and control logic before substitution. Non-TI equivalents require verification of switching frequency, quiescent current, and maximum output voltage capabilities.