TPS51124RGET

DC DC Switching Controllers Overview

The TPS51124RGET is a dual synchronous step-down controller from Texas Instruments, designed for low voltage power rails in embedded computing. It utilizes D-CAP control topology with a fixed switching frequency range of 240 kHz to 420 kHz. The device supports two outputs with an adjustable voltage range of 760 mV to 5.5 V and can drive external MOSFETs for currents up to 15 A per channel. It operates on a supply voltage of 4.5 V to 5.5 V, features a typical quiescent current of 350 uA, and functions within a temperature range of -40°C to +85°C. The component is housed in a 24-VQFN package.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture providing independent control for two synchronous buck converters.
• D-CAP control mode ensures fast transient response and inherent stability without requiring external compensation networks.
• Integrated power good indicator simplifies system sequencing and monitoring requirements.
• Supports out-of-audio-frequency operation to minimize audible noise in sensitive applications.

DC DC Switching Controllers Applications

• Low voltage power distribution in embedded computing systems
• Server and storage subsystem power management
• Industrial equipment requiring stable dual-rail power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'RGET' against the manufacturer's latest datasheet to confirm pinout compatibility and RoHS status. Ensure that the 24-VQFN footprint matches your PCB design guidelines. Confirm that the required switching frequency falls within the specified 240 kHz to 420 kHz range for your application timing constraints. Validate that the input voltage supply remains within the 4.5 V to 5.5 V operational window during all load conditions.

DC DC Switching Controllers Selection Notes

Select this component when designing dual-output DC-DC converters for low-voltage digital loads. It is suitable for applications requiring high efficiency and fast transient response without complex compensation. Consider the 15 A output capability and the wide input voltage range. Ensure the thermal performance of the 24-VQFN package meets the heat dissipation requirements of the target environment.

DC DC Switching Controllers Part Context

This part belongs to the TPS5112x series of dual synchronous step-down controllers. It shares functional similarities with the TPS51125 but differs in output current capabilities and specific feature sets. The series is targeted at embedded computing and industrial markets where compact size and high efficiency are critical. It complements other Texas Instruments PMIC solutions by providing dedicated multi-phase control for core voltages.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers include TPS51124RGER and TPS51125RGET. Verify electrical parameter compatibility and pin-to-pin alignment before substitution. The TPS51125 offers different current ratings and may require circuit adjustments. Always consult the official datasheets for both the original and replacement parts to ensure functional equivalence.

DC DC Switching Controllers FAQ

What control topology does the TPS51124RGET use?

It uses D-CAP control mode, which provides fast transient response and eliminates the need for external type-II compensation networks.

Is the TPS51124RGET a complete regulator or just a controller?

It is a switching controller that requires external high-side and low-side MOSFETs to form the complete DC-DC converter stages.

What is the operating supply voltage range for the IC itself?

The controller operates with a supply voltage (Vcc/Vdd) ranging from 4.5 V to 5.5 V.