TPS51221RTVT

Overview

The TPS51221RTVT is a synchronous dual-output peak current mode buck controller designed for notebook system power applications. It operates within an input voltage range of 3 V to 28 V and supports output voltages from 1 V to 12 V. The device features a fixed switching frequency selectable between 200 kHz and 1 MHz, with a maximum duty cycle of 99%. It is housed in a 32-pin WQFN package rated for operation between -40°C and +85°C.

Feature Summary

• Dual synchronous buck controllers optimized for multi-rail notebook power supplies
• Peak current mode control architecture for fast transient response
• Selectable light load operation modes including continuous, auto skip, and out-of-audio skip

Applications

• Notebook system power distribution
• Point-of-load regulation in LCD TVs
• Power management for Multi-Function Printers (MFP)

Procurement Notes

Verify the specific suffix RTVT corresponds to the WQFN-32 package and reel packaging configuration. Confirm that the component meets RoHS standards and humidity sensitivity level 2 requirements for surface-mount assembly processes. Ensure compatibility with the intended thermal management solution given the exposed pad design.

Selection Notes

Select this controller when designing systems requiring two independent synchronous buck rails driven by a single IC. It is suitable for applications needing flexible switching frequencies to optimize efficiency or reduce EMI. Consider the peak current mode control if fast transient response is critical for the load dynamics.

Part Context

This component belongs to the TPS5122x series of fixed-frequency notebook system power controllers. It complements other variants like the TPS51220 and TPS51222 by providing a dual-buck solution tailored for cost-effective 2S to 4S battery-powered portable electronics.

Replacement Considerations

Direct substitutes include TPS51220ARTVT and TPS51222RTVT. Verify pinout compatibility and output configuration differences before substitution.