LDI559-3.0EN

Overview

The LDI559-3.0EN is a low-dropout positive fixed voltage regulator manufactured by Diotec Semiconductor, housed in an SOT-23-5 surface-mount package. It provides a nominal output voltage of 3.0 V with a tolerance range of 2.94 V to 3.06 V. The device supports a maximum output current of 100 mA and features a typical dropout voltage of 160 mV at this load. It operates within a junction temperature range of -40°C to +125°C and consumes a quiescent current of approximately 5 µA. The component includes an enable pin for power management and offers protection against voltage overshoot.

Feature Summary

• Low dropout voltage performance ensuring efficient regulation under minimal input-output differentials
• Integrated enable function allowing precise control over power consumption states
• Fixed output voltage configuration eliminating external resistor requirements for standard voltages
• Built-in protection mechanisms safeguarding against transient voltage overshoot events

Applications

• Battery-powered portable electronic devices requiring extended operational life
• Embedded systems utilizing microcontrollers with strict low-power standby requirements
• Consumer electronics needing stable 3.0 V logic supply rails from higher voltage sources

Procurement Notes

Verify the specific ordering suffix and package variant when sourcing, as manufacturers may update component revisions or packaging formats without altering core electrical specifications. Confirm that the supplier provides official datasheets matching the LDI559-3.0EN designation to ensure compatibility with existing circuit designs. Cross-reference the manufacturer's latest documentation to validate thermal characteristics and absolute maximum ratings before finalizing procurement orders.

Selection Notes

Select this regulator when a compact SOT-23-5 footprint is required alongside low quiescent current operation for energy-sensitive applications. Ensure the input voltage exceeds the minimum dropout threshold plus the 3.0 V output to maintain regulation under full 100 mA load conditions. Consider the thermal dissipation capabilities of the PCB layout, as the small package size limits heat spreading compared to larger regulator packages.

Part Context

This component belongs to Diotec Semiconductor's LDO linear voltage regulator family, designed for space-constrained modern electronics. The LDI559 series specifically targets applications demanding high efficiency and low noise from fixed-voltage regulators. It complements other Diotec offerings such as the LDI92 and LDI51 series, providing options for varying output voltages and current capabilities within similar package constraints.

Replacement Considerations

Direct substitutes include the LDI559-3.3EN for a 3.3 V output requirement within the same package and current class. For higher current needs, consider the LDI51 series, though pinouts and electrical parameters differ. Verify that any replacement maintains the SOT-23-5 form factor and meets the -40°C to +125°C operating temperature range specified for the original design.