LDK220M32R

Overview

The LDK220M32R is a fixed-output linear low-dropout regulator (LDO) manufactured by STMicroelectronics. It provides a fixed output voltage of 3.2V with a maximum continuous output current of 200mA. The device operates from an input voltage range of 2.5V to 13.2V and features a typical dropout voltage of 100mV at 100mA load. Quiescent current is specified at 90µA, with a maximum supply current of 100µA. It includes logic-controlled electronic shutdown and output discharge functions. Protection mechanisms include overcurrent limiting and thermal shutdown. The component is housed in a SOT-23-5 package and supports operation across a temperature range of -40°C to +125°C.

Feature Summary

• Logic-controlled electronic shutdown with output discharge function for power management
• Internal overcurrent and thermal protection circuits ensure operational safety
• Compatible with ceramic capacitors for stable regulation without bulk capacitance

Applications

• Portable battery-powered consumer electronics requiring efficient voltage regulation
• Embedded systems utilizing microcontrollers or sensors needing stable 3.2V supply
• Industrial control modules operating within wide ambient temperature ranges

Procurement Notes

Verify the specific suffix 'M32R' corresponds to the 3.2V fixed output variant when sourcing. Confirm the package designation matches SOT-23-5 requirements for your PCB layout. Ensure compatibility with RoHS3 standards if required by your manufacturing process. Cross-reference the manufacturer part number directly with official STMicroelectronics documentation to avoid confusion with similar LDK220 series variants.

Selection Notes

Select this component when a precise 3.2V rail is necessary for downstream circuitry. The low quiescent current makes it suitable for battery-operated devices where standby power consumption is critical. Verify that the input voltage remains within the 2.5V to 13.2V window under all operating conditions. Consider the thermal dissipation capabilities of the SOT-23-5 package relative to the expected load current and ambient temperature.

Part Context

This device belongs to the LDK220 family of low-dropout regulators designed for portable applications. The family offers various fixed output voltages and adjustable options to support diverse system requirements. Manufactured by STMicroelectronics, these regulators emphasize low noise and high power supply rejection ratio (PSRR) performance. The LDK220M32R specifically targets applications requiring a stable 3.2V supply with minimal external component count.

Replacement Considerations

Direct substitutes within the LDK220 family include other fixed-voltage variants such as LDK220M18R or LDK220M25R, provided the output voltage requirement differs. Check datasheets for pin-out compatibility and electrical parameter alignment before substitution.