S-1701B1815-U5T1G

Overview

The S-1701B1815-U5T1G is a dual-output low dropout (LDO) voltage regulator from ABLIC's S-1701 series, integrating fixed voltage regulation with a voltage detector. It provides two independent positive outputs of 1.5 V and 1.8 V with a maximum output current of 400 mA per channel. The device features a typical quiescent current of 85 µA and a voltage regulation accuracy of ±1%. It operates within an input voltage range supporting these outputs, maintaining performance across a temperature range of -40°C to +85°C. Key electrical parameters include a line regulation of 0.2%/V, load regulation of 40 mV, and a power dissipation capability of 1 W.

Feature Summary

• Integrates dual fixed LDO regulators with a built-in voltage detector in a single package
• Provides high output current capability of 400 mA for demanding load applications
• Maintains ultra-low standby current consumption of 85 µA to extend battery life
• Ensures stable operation with tight voltage regulation accuracy of ±1%

Applications

• Portable electronic devices requiring efficient multi-rail power management
• Battery-powered systems needing extended operational time due to low quiescent current
• Embedded circuits requiring simultaneous supply of 1.5 V and 1.8 V logic levels
• Applications utilizing the integrated voltage detector for system reset or monitoring

Procurement Notes

Verify the specific suffix U5T1G corresponds to the required SOT-89-5 packaging and reel quantity during ordering. Confirm that the 1.5 V and 1.8 V output combination matches the target circuit design requirements. Ensure compatibility with the specified operating temperature range of -40°C to +85°C for the intended environment. Check for any recent product change notifications regarding pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a dual-output solution is needed to save board space compared to using separate regulators. The 400 mA output current supports moderate to high-power loads, while the 85 µA quiescent current is suitable for energy-sensitive designs. Consider the SOT-89-5 package for its thermal performance relative to smaller packages. Verify that the fixed 1.5 V and 1.8 V outputs align with the system's voltage requirements without needing external adjustment resistors.

Part Context

This part belongs to the ABLIC S-1701 series of combo voltage detectors and regulators. The series is designed for portable equipment, offering a balance of high output current and low power consumption. The S-1701B1815 variant specifically targets applications requiring 1.5 V and 1.8 V rails, commonly found in digital logic and memory interfaces. It complements other S-1701 models with different output combinations.

Replacement Considerations

Check for other S-1701 variants with different output voltages if the 1.5 V/1.8 V combination is not strictly required. Verify pin-to-pin compatibility with alternative dual-output LDOs from other manufacturers if supply constraints exist. Ensure that any substitute maintains the 400 mA current rating and similar quiescent current specifications.