ET51615B

Overview

The ET51615B is a linear regulator controller IC manufactured by ETEK Microelectronics. It provides a positive fixed output voltage of 1.5V with a maximum output current capability of 300mA. The device utilizes a precision voltage reference and feedback loop to achieve excellent regulation stability. It is designed to remain stable when used with a 1.0μF ceramic output capacitor. The component is housed in an SOT-23-5 package, suitable for surface-mount applications.

Feature Summary

• Provides a fixed positive output voltage via internal precision reference
• Ensures stability with standard 1.0μF ceramic output capacitors
• Integrates feedback loop control for consistent voltage regulation

Applications

• Portable electronic devices requiring low-noise power supplies
• Battery-powered systems needing efficient voltage step-down
• Embedded circuits utilizing external pass transistors for current boosting

Procurement Notes

Verify the specific manufacturer part number ET51615B against official ETEK Microelectronics documentation to confirm pinout compatibility and electrical specifications. Ensure that the sourcing channel provides genuine components with traceable origin. Cross-reference the SOT-23-5 package dimensions and thermal characteristics with the official datasheet before integration into the design. Confirm that the supplier adheres to quality standards required for analog power management components.

Selection Notes

Select this component when a fixed 1.5V output is required with moderate current demands up to 300mA. It is appropriate for designs where external pass elements are preferred or necessary for higher current handling. Consider the SOT-23-5 footprint constraints and the requirement for a 1.0μF ceramic capacitor for stability. Evaluate input voltage ranges against the specific application's supply rails to ensure proper dropout performance.

Part Context

This component belongs to the family of linear regulator controllers from ETEK Microelectronics. Unlike complete LDOs, this controller typically requires an external NPN or PNP pass transistor to handle the load current, offering flexibility in thermal management and current capacity. It serves as a core regulation element in power management integrated circuits (PMIC) for mobile and consumer electronics.

Replacement Considerations

Consult official ETEK Microelectronics documentation for direct replacements. Verify pin-to-pin compatibility and electrical equivalence if substituting with similar linear regulator controllers from other manufacturers.