TPS51125RGER

DC DC Switching Controllers Overview

The TPS51125RGER is a dual-synchronous step-down controller manufactured by Texas Instruments, designed for notebook system power solutions. It operates with an input voltage range of 5.5 V to 28 V and provides two regulated outputs adjustable from 2 V to 5.5 V. The device integrates two 100-mA low-dropout regulators (LDOs) delivering 5 V and 3.3 V. It supports switching frequencies between 200 kHz and 460 kHz and utilizes adaptive constant on-time (D-CAP™) control for fast transient response. The component is housed in a 24-pin VQFN package and functions within a temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Integrates dual synchronous buck controllers with integrated 100-mA LDOs for auxiliary rails
• Utilizes adaptive constant on-time (D-CAP™) control architecture for enhanced transient performance
• Supports Out-of-Audio™ mode to minimize acoustic noise during light-load operations
• Includes a 270-kHz clock output to drive external charge pumps for load switch gate drivers

DC DC Switching Controllers Applications

• Notebook system power distribution networks
• Multi-rail server and storage subsystem power supplies
• Industrial equipment requiring synchronized dual-step-down regulation
• Point-of-load conversion modules for digital logic cores

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'RGER' against the manufacturer's official datasheet to confirm the tape-and-reel packaging configuration and pin assignment. Ensure that the required operating temperature range aligns with the industrial specification limits defined in the technical documentation. Cross-reference the ordering part number with the latest product change notifications to validate current production status and compliance with RoHS directives before finalizing procurement.

DC DC Switching Controllers Selection Notes

Select this component when designing systems requiring two independent synchronous buck channels alongside dedicated low-current auxiliary rails. The integrated D-CAP™ control reduces external compensation requirements compared to voltage-mode alternatives. Consider the thermal characteristics of the VQFN-24 package relative to the expected total power dissipation of both buck channels and LDOs under maximum load conditions.

DC DC Switching Controllers Part Context

This device belongs to the TPS5112x family of dual-synchronous step-down controllers optimized for portable computing applications. It shares architectural similarities with other TI power management ICs but distinguishes itself through the inclusion of integrated LDOs and specific clocking features for external load switches. The RGER suffix denotes a specific reel-based packaging variant intended for automated surface-mount assembly processes.

DC DC Switching Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate alternative devices based on matching pin compatibility, electrical specifications, and control topology if direct substitution is required.