LDI559-1.8EN

Overview

The Diotec Semiconductor LDI559-1.8EN is a low dropout positive fixed voltage regulator housed in an SOT-23-5 package. It provides a stable output voltage of 1.8 V with a maximum output current of 0.3 A. The device supports an input voltage up to 18 V and features an enable function for power management. Key electrical parameters include a dropout voltage of 160 mV at 100 mA output current, a minimum operating temperature of -40 °C, and a maximum operating temperature of +125 °C.

Feature Summary

• Integrated enable (EN) pin for precise power control and low-power consumption
• Low dropout voltage performance ensuring stability under varying load conditions
• Fixed output voltage regulation for consistent power delivery

Applications

• Battery-powered portable electronic devices requiring efficient power management
• Embedded systems utilizing microcontrollers or sensors needing stable 1.8 V supply
• Consumer electronics where space-constrained SOT-23-5 packaging is required

Procurement Notes

Verify the specific suffix EN indicates the presence of the enable pin functionality as documented in official Diotec datasheets. Confirm RoHS compliance status through manufacturer documentation prior to integration. Ensure input voltage does not exceed the 18 V absolute maximum rating to prevent device damage during operation.

Selection Notes

Select this component when a compact linear regulator with an enable feature is required for 1.8 V applications. The SOT-23-5 package suits space-limited designs. Consider the 0.3 A current limit and thermal dissipation capabilities relative to the expected load profile and ambient temperature conditions.

Part Context

This part belongs to Diotec's LDI559 series of low dropout regulators. The series offers various fixed output voltages including 1.8 V, 3.0 V, and 3.3 V. The LDI559-1.8EN specifically targets applications requiring low quiescent current and high efficiency within a small surface-mount footprint.

Replacement Considerations

Check for other LDI559 variants with different output voltages if system requirements change. Verify compatibility with alternative LDOs from other manufacturers by matching pinout, voltage ratings, and package dimensions.