ISL80101IR33Z

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

The ISL80101IR33Z is a fixed positive low dropout regulator with a 3.3V output and 1A current capability. It operates from an input voltage range of 2.2V to 6V. The device guarantees ±1.8% DC output voltage accuracy across the -40°C to +125°C temperature range. Dropout voltage is specified at 130mV typical and 212mV maximum at 1A load. Power supply rejection ratio reaches 65dB at 120Hz and 58dB at 1kHz. Quiescent current ranges from 3mA to 7mA depending on load. The component includes programmable soft-start, power-good logic output, overcurrent protection, and thermal shutdown features.

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

• Provides stable regulation with guaranteed accuracy across wide operating conditions
• Features fast transient response utilizing state-of-the-art internal compensation
• Includes open-drain power-good indicator for fault condition signaling
• Offers adjustable startup ramp via external capacitor on soft-start pin

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

• DSP, FPGA and microprocessor core power supplies
• Noise-sensitive instrumentation systems
• Post regulation of switched mode power supplies
• Industrial systems and medical equipment
• Telecommunications and networking equipment

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

Verify datasheet revision FN6931 Rev 3.00 for accurate specifications. Confirm package marking DZGB matches the 3.3V fixed output variant. Ensure compatibility with 10-lead DFN footprint L10.3x3 during layout. Check moisture sensitivity level requirements before soldering. Validate that input and output capacitors meet X5R/X7R minimums for stability.

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

Select this part when a fixed 3.3V rail is required within a 2.2V to 6V input window. The 1A output current supports moderate load demands. Verify that the 130mV typical dropout meets system headroom needs. Consider the 65dB PSRR for noise-sensitive analog sections. Ensure PCB copper area supports thermal dissipation for the exposed pad design.

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

This component belongs to the ISL80101 family of high-performance linear regulators manufactured by Renesas Electronics Corporation (formerly Intersil). The series utilizes a submicron BiCMOS process to achieve low quiescent current consumption compared to bipolar alternatives. The IR33Z suffix specifically denotes the 3.3V fixed output version in a lead-free RoHS compliant 10-lead DFN package.

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

The datasheet explicitly recommends the ISL80101-ADJ as the replacement part. This alternative provides an adjustable output voltage rather than a fixed 3.3V setting. Designers must account for the change from fixed to adjustable topology when substituting.