S-1701B5040-U5T1G

Overview

The S-1701B5040-U5T1G is a dual-output low-dropout (LDO) voltage regulator manufactured by ABLIC Inc. It provides fixed output voltages of 4.0 V and 5.0 V with a maximum continuous output current of 400 mA per channel. The device operates within an input voltage range of 2.0 V to 6.5 V and maintains a typical dropout voltage of 140 mV at 100 mA load. It features a quiescent current of 85 µA, ensuring efficient power management in battery-powered applications. The unit is housed in a compact SOT-89-5 surface-mount package and supports operation across a temperature range of -40°C to +85°C.

Feature Summary

• Integrates two independent LDO regulators with a combined voltage detector function for system monitoring.
• Delivers high output current capability of 400 mA per channel while maintaining low quiescent current consumption.
• Provides stable regulation with low dropout voltage characteristics suitable for varying input conditions.

Applications

• Portable electronic devices requiring multiple regulated voltage rails from a single source.
• Battery-operated systems where low standby current and extended runtime are critical.
• Embedded controllers needing integrated voltage supervision and regulation in a small footprint.

Procurement Notes

Verify the specific pinout configuration against the official datasheet before PCB layout finalization. Confirm that the thermal performance of the SOT-89-5 package meets your application's power dissipation requirements under maximum load conditions. Ensure input voltage does not exceed the absolute maximum rating to prevent device damage. Check for any recent product change notifications regarding manufacturing updates or material substitutions.

Selection Notes

Select this component when dual isolated outputs are required from a single regulator IC to save board space. Compare the 400 mA current rating against your peak load demands to ensure adequate headroom. Consider the 140 mV dropout voltage relative to your minimum input voltage margin. Evaluate the SOT-89-5 package size constraints against available PCB real estate compared to alternative packages like SOT-23-5.

Part Context

This part belongs to the S-1701 series of combo voltage detectors and regulators. The series is designed for portable equipment requiring high efficiency and compact solutions. Other variants in the family offer different fixed output voltage combinations while sharing similar electrical characteristics and packaging options.

Replacement Considerations

Direct substitutes include other S-1701 series parts with compatible output voltages and current ratings. Verify pin compatibility and thermal specifications when considering cross-references from other manufacturers offering dual LDOs with voltage detection.