MIC5209-5.0BU TR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The MIC5209-5.0BU TR is a fixed-output linear voltage regulator manufactured by Microchip Technology, providing a nominal 5.0V output with a maximum continuous current of 500 mA. It operates within an input voltage range of +2.5V to +16V and features a maximum dropout voltage of 600 mV at full load. The device includes an enable/shutdown pin for power management and offers protection against overcurrent, thermal overload, and reversed battery connections. It is housed in a DDPAK (TO-263-5) surface-mount package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultra-low-noise capability achieved through an optional reference bypass capacitor connected to the BYP pin.
• Integrated enable/shutdown control compatible with CMOS logic levels for near-zero shutdown current.
• Robust protection mechanisms including current limiting, thermal shutdown, and reversed-battery protection.
• No-load stability ensures reliable operation even when disconnected from external loads.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Slot 1 and Slot 2 support circuits for Pentium II processors
• Laptop, notebook, and palmtop computer power systems
• Cellular telephone power regulation
• Post-regulator stages for switching mode power supplies (SMPS)
• High-efficiency linear power supply designs

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and tape-and-reel quantity. Confirm the manufacturer's part number matches the requested specifications exactly. Check for any recent Product Change Notifications regarding packaging or assembly site updates. Ensure compliance with RoHS and REACH directives as stated in the datasheet. Validate the component authenticity through authorized distribution channels.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for applications requiring low noise and high accuracy in space-constrained environments. The DDPAK package provides superior thermal dissipation compared to smaller packages, suitable for higher power dissipation scenarios. Consider the enable pin functionality if system power management requires remote shutdown capabilities. Ensure the input voltage remains within the specified operating range to maintain regulation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The MIC5209 series consists of efficient linear voltage regulators designed for handheld and battery-powered devices. It offers various output voltages ranging from 1.8V to 15V and is available in multiple packages including SOT-223, SOIC-8, DDPAK, and DFN. The series is optimized for low ground current to extend battery life and meets Intel Slot 1/2 requirements.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct substitutes include other MIC5209 variants with different output voltages or packages, such as MIC5209-5.0YM or MIC5209-5.0YS. Verify compatibility regarding package dimensions, pinout configuration, and thermal characteristics before substitution.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How does the MIC5209 achieve ultra-low-noise performance?

Ultra-low-noise performance is achieved by connecting an optional 470 pF capacitor between the BYP pin and GND, which quiets the internal voltage reference.

What is the function of the EN pin on the MIC5209-5.0BU?

The EN pin serves as an enable/shutdown input. Driving it high enables the regulator, while driving it low shuts it down, reducing ground current to near zero.

Is the MIC5209 stable without a load connected?

Yes, the MIC5209 is designed to remain stable and in regulation with no load, making it suitable for applications like CMOS RAM keep-alive.