MIC5504-1.2YMT-TR

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

The MIC5504-1.2YMT-TR is a single-output low-dropout linear regulator from the MIC550x family, manufactured by Microchip Technology. It provides a fixed output voltage of 1.2 V with a guaranteed maximum output current of 300 mA. The device operates within an input voltage range of 2.5 V to 5.5 V and features high output accuracy of ±2%. Key electrical characteristics include a typical quiescent current of 38 μA, a dropout voltage of 160 mV at full load, and a ripple rejection ratio of 60 dB at 1 kHz. It incorporates internal enable pull-down and auto-discharge circuits for efficient power management.

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

• Integrated internal enable pull-down resistor ensures the output disables automatically when the control signal is floating or tri-stated.
• Built-in auto-discharge circuit activates an internal load to rapidly discharge external capacitors upon shutdown.
• Designed for stability using standard 1 μF ceramic output capacitors without requiring additional compensation components.
• Includes comprehensive protection mechanisms against thermal overload and excessive output current.

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

• Smartphones
• Portable electronics such as PDAs and PMPs
• Digital still cameras (DSC) and GPS modules
• Medical devices

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

Verify the specific suffix 'TR' corresponds to the required reel quantity, as the datasheet indicates TDFN packages are typically supplied in reels of 5,000 units. Confirm that the 4-Lead TDFN package dimensions align with the target PCB footprint. Ensure the application environment remains within the specified -40°C to +125°C operating junction temperature range to maintain performance specifications.

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

Select this component when a fixed 1.2 V rail is required with minimal ground current consumption. The MIC5504 variant is specifically chosen over other family members due to its combination of auto-discharge functionality and internal enable pull-down, which simplifies interface logic during processor boot sequences. Verify that the input voltage differential supports the required 300 mA load while staying within thermal limits.

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

This part belongs to the MIC5501/2/3/4 series of advanced general-purpose LDOs designed for portable devices. The MIC5504 distinguishes itself by combining both auto-discharge and internal enable pull-down features. It is available in ultra-small 1 mm x 1 mm DFN and SOT23-5 packages, targeting space-constrained designs where low noise and high accuracy are critical for powering sensitive digital loads.

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

MIC5504-1.2YMT-TZ

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

What happens to the output voltage when the Enable pin is left floating?

The MIC5504 includes an internal pull-down resistor on the Enable pin. If the pin is left floating, the regulator interprets this as a logic-low state, disabling the output and activating the auto-discharge circuit to drain the output capacitor.

Is an external output capacitor required for stability?

Yes, the device requires an output capacitor of 1 μF or greater to maintain stability. It is optimized for use with low-ESR ceramic chip capacitors, specifically X7R or X5R dielectrics.