TPS61251DSGR

Power Management - Specialized Overview

The TPS61251DSGR is a boost converter designed for battery backup charging applications, featuring adjustable constant current and snooze mode capabilities. It operates with an input voltage range of 2.3V to 6.0V and supports an adjustable output voltage up to 6.5V. The device integrates a resistor-programmable average input current limit, offering ±20% accuracy at 500mA across the full temperature range. It achieves peak efficiency of 92% and includes features such as power good indication, 100% duty cycle operation, load disconnect, and reverse current protection.

Power Management - Specialized Feature Summary

• Resistor-programmable average input current limit for flexible application scenarios
• High efficiency performance with integrated power management features
• Adjustable output voltage capability with power good indication
• Integrated protection mechanisms including load disconnect and reverse current protection

Power Management - Specialized Applications

• USB host power supply from single lithium-ion batteries
• Current-limited applications requiring strict input current control
• Lithium-ion battery powered devices
• Audio equipment power supplies
• RF power amplifier buffers

Power Management - Specialized Procurement Notes

Verify the specific suffix DSGR against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure compatibility with your PCB footprint and reflow profile requirements. Cross-reference the date code and lot number with your quality assurance standards. Confirm that the component meets all relevant environmental and safety certifications required for your final product assembly.

Power Management - Specialized Selection Notes

Select this component when designing portable systems requiring efficient step-up conversion from single-cell lithium or multi-cell alkaline sources. The adjustable input current limit makes it suitable for USB-powered hosts where source current must be regulated. Consider the wide input voltage range and high efficiency for battery-operated devices needing stable output under varying load conditions.

Power Management - Specialized Part Context

The TPS61251 series is part of Texas Instruments' portfolio of boost converters optimized for battery-backed applications. The DSGR variant specifically denotes the surface-mount package configuration. This family addresses the need for compact, high-efficiency power solutions in mobile and peripheral devices, providing reliable voltage regulation from diverse battery chemistries.

Power Management - Specialized Replacement Considerations

Consult official substitution guides for compatible alternatives within the same functional category. Verify pinout compatibility and electrical parameter alignment before replacing. Ensure any substitute component meets the same thermal and mechanical requirements for your design.

Power Management - Specialized FAQ

What is the maximum adjustable output voltage for the TPS61251?

The output voltage can be adjusted up to 6.5V using the feedback resistor network.

How is the input current limit programmed?

The average input current limit is programmable via an external resistor (RILIM), allowing settings between 100mA and 1500mA.