ISL80101IR33Z-T

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

The ISL80101IR33Z-T is a fixed positive low dropout linear regulator providing a 3.3V output at up to 1A current. It operates from an input voltage range of 2.2V to 6V with a maximum dropout voltage of 212mV at full load. The device features ±1.8% DC output voltage accuracy across the -40°C to +125°C temperature range and includes programmable soft-start, power-good logic output, overcurrent protection, and thermal shutdown. It utilizes a submicron BiCMOS process for high efficiency and fast transient response.

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

• Submicron BiCMOS process technology ensures high analog performance and lower quiescent current consumption compared to bipolar LDOs.
• State-of-the-art internal compensation provides very fast load transient response capabilities.
• Integrated power-good open-drain logic output signals fault conditions when output voltage drops below regulation thresholds.
• External capacitor on the soft-start pin allows adjustable startup ramp time and inrush current control.

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 that the ordering suffix '-T' corresponds to tape and reel packaging as specified in technical brief TB347. Confirm the component meets RoHS compliance standards utilizing special lead-free material sets and matte tin plate plus anneal termination finishes. Ensure compatibility with Pb-free peak reflow temperatures defined by IPC/JEDEC J STD-020 requirements during assembly processes.

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

Select this component for applications requiring a fixed 3.3V rail with 1A capability within a 2.2V to 6V input window. Consider the 10-lead DFN package for space-constrained designs requiring effective heat dissipation via the exposed pad. Evaluate external capacitor requirements, specifically minimum 10µF X5R/X7R types, to ensure stability and optimal transient performance under varying load conditions.

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

The ISL80101 series belongs to Intersil's high-performance LDO family manufactured using submicron BiCMOS technology. This specific part represents the fixed 3.3V variant packaged in a 10-lead 3x3mm DFN format. The datasheet FN6931 Rev 3.00 documents its electrical characteristics, including line/load regulation and ripple rejection metrics essential for precision power management design.

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

The datasheet explicitly identifies the ISL80101-ADJ as the recommended replacement part for new designs.

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

What are the minimum external capacitor requirements for stable operation?

A minimum of 10µF X5R or X7R ceramic capacitors is required on both the input (VIN) and output (VOUT) pins to ensure proper operation and stability.

How is the soft-start functionality implemented?

An external capacitor connected between the SS pin and ground adjusts the startup ramp time and controls inrush current by charging via an internal 2µA current source.

What happens if the junction temperature exceeds the thermal limit?

If the die temperature exceeds approximately +160°C, the output shuts down. The device resumes normal operation once the temperature cools to about +130°C due to thermal hysteresis.