S-1701E1815-U5T1G

Overview

The S-1701E1815-U5T1G is a positive fixed-output low dropout (LDO) voltage regulator manufactured by ABLIC. It provides a single output of 1.8 V with a maximum load current of 400 mA. The device operates within an input voltage range of 2 V to 6.5 V and features a typical dropout voltage of 340 mV at 100 mA, with a maximum of 380 mV. It maintains a voltage regulation accuracy of 1%, line regulation of 0.2%/V, and load regulation of 40 mV. The component is housed in an SOT-89-5 package, measuring 4.5 mm x 2.5 mm x 1.5 mm, and supports operation from -40°C to +85°C.

Feature Summary

• Integrates voltage detection and regulation functions for combined power management
• Provides high ripple rejection performance for stable output under noisy conditions
• Features ultra-low quiescent current consumption to extend battery life
• Includes built-in reset function to ensure system reliability during power fluctuations

Applications

• Portable electronic devices requiring efficient power management
• Battery-powered systems needing low standby current
• Embedded circuits requiring precise voltage monitoring and regulation
• Mobile communication equipment with strict power constraints

Procurement Notes

Verify the complete part number including suffixes such as U5T1G to ensure correct packaging and tape/reel specifications. Confirm RoHS compliance status through official manufacturer documentation before procurement. Check for any recent product change notifications that may affect pinout or electrical characteristics. Ensure compatibility with existing PCB footprint dimensions for SOT-89-5 packages.

Selection Notes

Select this component when a single regulated output is required alongside voltage detection capabilities. Consider the 400 mA output current limit and 1.8 V fixed output voltage against system requirements. Evaluate thermal dissipation needs given the 1 W power dissipation rating in the SOT-89-5 package. Compare dropout voltage specifications against available input voltage headroom to ensure stable regulation under all operating conditions.

Part Context

This device belongs to the S-1701 series of LDO regulators from ABLIC, designed for applications combining voltage regulation with detection functions. The series offers various output voltages and package options to suit different power management needs. The S-1701E variant specifically denotes the configuration with integrated voltage detection features, distinguishing it from standard regulator-only versions within the same family.

Replacement Considerations

Direct substitutes include other S-1701 series parts with identical output voltage and package, such as S-1701E1815-M5T1G if pin-compatible alternatives are needed. Verify equivalent electrical parameters including dropout voltage, quiescent current, and reset thresholds before substitution. Cross-reference package dimensions and thermal characteristics to ensure mechanical fit.