TPS51511RHLT

Overview

The TPS51511RHLT is a synchronous switcher controller with an integrated 2A LDO, designed for GPU power applications. It operates within a 3V to 28V input voltage range and supports a switching frequency of 350kHz. The device features D-CAP control mode and offers dynamic voltage scaling. It provides one regulated output with a maximum voltage of 3.3V and a minimum of 0.75V. The component is housed in a 20-pin VQFN package and functions reliably across an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrates a dedicated 2A low-dropout regulator (LDO) alongside the main synchronous switcher controller.
• Supports dynamic voltage scaling for efficient power management in graphics processing units.
• Utilizes D-CAP control mode for stable operation without requiring external compensation networks.

Applications

• GPU core power supply design
• High-performance computing voltage regulation
• Portable electronics requiring compact power solutions

Procurement Notes

Verify the specific suffix RHLT against the manufacturer's official datasheet to confirm pinout and thermal pad configuration. Ensure compatibility with the intended PCB layout for the 20-VQFN package. Cross-reference the RoHS compliance status and moisture sensitivity level prior to assembly planning. Confirm that the selected variant matches the required operating temperature range for the target application environment.

Selection Notes

Select this component when a combined solution for high-current switching and auxiliary LDO power is required. The integrated LDO simplifies board space by eliminating the need for a separate linear regulator. Consider the 350kHz switching frequency for balancing efficiency and passive component size. Verify that the input voltage range aligns with the system's power rails and that the output voltage requirements fall within the specified 0.75V to 3.3V window.

Part Context

This part belongs to Texas Instruments' family of synchronous switcher controllers optimized for demanding digital loads. It addresses the trend toward integrating multiple power stages into single packages to reduce footprint. The inclusion of an LDO distinguishes it from standard buck controllers, offering a complete power solution for complex systems like GPUs where multiple voltage domains are needed.

Replacement Considerations

Check for direct pin-to-pin replacements within the same product family that may offer updated thermal performance or extended temperature ranges. Verify functional equivalence regarding control modes and output capabilities before substitution.

FAQ

What control mode does the TPS51511RHLT utilize?

It utilizes D-CAP control mode, which allows for stable operation without external compensation components.

Is there an integrated LDO in this controller?

Yes, the device includes a built-in 2A low-dropout regulator (LDO) in addition to the synchronous switcher controller.