LDK220U50R

Overview

The LDK220U50R is a fixed-output linear voltage regulator manufactured by STMicroelectronics, providing a stable 5V output with a maximum current capacity of 200mA. It operates within an input voltage range of 2.5V to 13.2V and features a typical dropout voltage of 100mV at 100mA load. The device incorporates low quiescent current characteristics, with a typical value of 55µA and less than 1µA in shutdown mode. It includes logic-controlled electronic shutdown, internal short-circuit constant current limiting, and thermal protection. The component is housed in a SOT-89 surface-mount package and supports ceramic capacitors for stability.

Feature Summary

• Logic-controlled electronic shutdown function enables deep sleep mode with ultra-low standby current consumption
• Internal protection mechanisms include short-circuit constant current limiting and thermal overload protection
• Compatible with small ceramic output capacitors, eliminating the need for bulky tantalum or aluminum components
• Low noise and low dropout voltage design optimizes efficiency for battery-powered portable applications

Applications

• Battery-powered portable consumer electronics requiring extended standby time
• Handheld devices utilizing low-dropout regulation for efficient power management
• Portable equipment needing stable 5V supply from varying input sources
• Applications requiring ceramic capacitor compatibility for compact board design

Procurement Notes

Verify the specific suffix 'U50R' corresponds to the 5V fixed output variant and SOT-89 package configuration. Confirm RoHS3 compliance status and moisture sensitivity level requirements for your assembly process. Ensure input voltage does not exceed the 13.2V maximum rating during operation. Check for any specific ordering suffixes that might indicate different packaging quantities or tape-and-reel specifications.

Selection Notes

Select this component when a fixed 5V output is required with minimal external component count. It is suitable for designs prioritizing low quiescent current to maximize battery life in portable devices. Consider the SOT-89 package size constraints and thermal dissipation capabilities under expected load conditions. Verify that the application can tolerate the specified dropout voltage characteristics across the full operating temperature range.

Part Context

The LDK220 series represents STMicroelectronics' line of low-dropout linear regulators designed for low-power applications. This family emphasizes low quiescent current and low noise performance, making it ideal for sensitive analog circuits and battery-operated systems. The LDK220U50R specifically provides a fixed 5V output, distinguishing it from adjustable variants within the same product family.

Replacement Considerations

Consult official STMicroelectronics documentation for verified cross-reference part numbers. Ensure any substitute maintains compatible pinout, output voltage tolerance, and package dimensions. Verify that alternative components meet the same electrical specifications regarding dropout voltage, current capacity, and protection features.