EZ1581CT-2.5T

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The EZ1581CT-2.5T is a fixed-output positive voltage regulator from the Semtech EZ158X family, designed for high-performance applications requiring low dropout characteristics at up to 5 amps. It features a dual-input architecture that enables superior dropout performance compared to standard LDOs when both 5V and 3.3V supplies are available on motherboards. This design significantly reduces heat dissipation, allowing for smaller heatsink sizes or elimination. The device provides excellent regulation over line, load, and temperature variations, with remote sense operation to compensate for resistive losses in traces and connectors.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Dual-input architecture enabling superior dropout performance compared to regular LDOs
• Remote sense operation to compensate for trace, connector, and other resistive losses
• Fast transient response capability
• Excellent regulation over variations in line, load, and temperature

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Microprocessor supplies
• Split plane microprocessor supplies
• Advanced graphics cards
• Sound cards
• Low voltage logic supplies

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix 'CT' against official Semtech documentation to confirm package type and tape-and-reel configuration. Ensure the part number matches the exact output voltage variant required for the target application. Cross-reference with the EZ158X family datasheet to confirm pinout compatibility and thermal requirements for the selected package style before procurement.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when operating from dual inputs (e.g., 5V and 3.3V) to maximize efficiency and minimize thermal management needs. Consider the remote sense feature if significant voltage drop exists between the regulator and the load point. Evaluate the 5A current rating against peak load demands to ensure adequate headroom and stable operation under transient conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The EZ1581CT-2.5T belongs to the EZ158X family of high-performance positive voltage regulators. This family includes variants rated for 7A, 5A, 3A, and 1.5A outputs. The EZ1581 specifically denotes the 5-amp current capability within this series, sharing the same dual-input low-dropout technology and regulatory performance characteristics as its higher and lower current counterparts.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

EZ1580CM-2.5TRT

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

What is the primary advantage of the EZ1581CT-2.5T over standard LDOs?

It utilizes a dual-input architecture that provides superior dropout characteristics when both 5V and 3.3V supplies are available, resulting in reduced heat dissipation.

How does the remote sense feature benefit the circuit?

Remote sense operation allows the regulator to compensate for resistive losses in traces, connectors, and other path components, ensuring accurate voltage delivery at the load.