TPS51123ARGER

Overview

The TPS51123ARGER is a dual-synchronous step-down controller designed for notebook system power applications. It operates with an input voltage range of 4.5V to 28V and supports output voltages from 0.6V to 5.5V. The device features D-CAP control mode, enabling stable operation with low-cost ceramic capacitors. It includes two synchronous buck channels and two integrated 100mA LDOs. Key specifications include a typical quiescent current of 550µA, a maximum duty cycle of 93%, and a switching frequency of 460kHz. It functions within an operating temperature range of -40°C to 85°C.

Feature Summary

• Dual-synchronous buck topology with integrated Out-of-Audio operation for reduced acoustic noise in sensitive environments.
• D-CAP control mode architecture allowing for stable performance using standard ceramic output capacitors without ESR requirements.
• Integrated dual 100mA low-dropout regulators (LDOs) providing auxiliary power rails for notebook system components.
• Flexible external component selection supporting optimized board space and cost efficiency for portable computing designs.

Applications

• Notebook computer main voltage regulation
• Portable electronic device power management systems
• Multi-rail DC-DC conversion architectures
• Battery-powered equipment requiring efficient step-down conversion

Procurement Notes

Verify the specific suffix 'ARGET' against the manufacturer's official ordering information to confirm package type and tape-and-reel specifications. Ensure compatibility with RoHS 3 standards and check for any recent product change notifications regarding material or packaging updates before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring dual independent synchronous buck outputs combined with auxiliary LDO rails. It is suitable for applications needing wide input voltage ranges up to 28V and flexible output configurations. Consider the D-CAP control benefits for simplified compensation and stability with ceramic capacitors compared to traditional voltage-mode controllers.

Part Context

This part belongs to Texas Instruments' TPS5112x series of dual-synchronous step-down controllers. It is engineered specifically for notebook and mobile computing power architectures. The series emphasizes high efficiency and compact design through integrated features and advanced control modes, targeting the demanding power delivery requirements of modern portable electronics.

Replacement Considerations

The TPS51125A is a documented similar device offering lower quiescent current and adjustable soft-start capabilities. Designers should evaluate thermal performance and pin-to-pin compatibility if substituting, as package dimensions and electrical characteristics may differ between these related models.

FAQ

What control mode does the TPS51123ARGER utilize?

It utilizes D-CAP control mode, which allows for stable operation with low-cost ceramic output capacitors.

Does the device include auxiliary power regulators?

Yes, it integrates two 100mA low-dropout regulators (LDOs) for powering additional system components.