ISL80101IR33Z

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

The ISL80101IR33Z is a fixed positive low-dropout (LDO) linear regulator manufactured by Intersil, now part of Renesas Electronics. It provides a fixed 3.3V output with a maximum continuous current capability of 1A. The device operates within an input voltage range of 2.2V to 6V and features a maximum dropout voltage of 0.212V at full load. Key electrical specifications include a quiescent current of 5mA and a power supply rejection ratio (PSRR) ranging from 65dB to 58dB across frequencies of 120Hz to 1kHz. It incorporates enable, power good, and soft start control features alongside overcurrent and overtemperature protection.

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

• Fixed 3.3V output configuration for stable voltage regulation
• Integrated enable pin for low quiescent current shutdown mode
• Built-in power good indicator for system status monitoring
• Programmable soft start functionality via external capacitor

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

• Portable battery-powered electronic devices
• Embedded systems requiring stable 3.3V logic rails
• Industrial control modules with strict thermal limits
• Communication equipment power distribution networks

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

Verify the manufacturer designation carefully, as this component may be sourced through Rochester Electronics or similar distributors handling legacy inventory. Confirm the package type matches the required 10-DFN footprint on the PCB layout. Ensure the fixed 3.3V output aligns with the target circuit design, as adjustable variants exist within the same series. Check for RoHS compliance documentation if environmental regulations apply to the final assembly.

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

Select this component when a fixed 3.3V rail is required without external feedback resistors. It is suitable for applications needing high efficiency in low-voltage environments due to its low dropout characteristic. Consider the 1A current limit for load requirements and ensure the input voltage remains within the 2.2V to 6V operational window. The integrated protections make it robust for industrial or automotive-grade environments where transient faults are possible.

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

This part belongs to the ISL80101 series of high-performance linear regulators designed for low noise and fast transient response applications. The series utilizes a sub-micron BiCMOS process to achieve superior analog performance compared to standard CMOS LDOs. It is often used in conjunction with other PMIC components in complex power management architectures for portable and industrial electronics.

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

Direct substitutes include the ISL80101IR33Z-TK tape-and-reel variant or the ISL80101AIRAJZ adjustable version if voltage flexibility is needed. Verify pin compatibility and thermal characteristics before swapping. Note that the ISL80102 series offers higher current capabilities but may require different thermal management strategies.