MIC5364-1.2YMT-T5

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

The MIC5364-1.2YMT-T5 is a high-performance, 300mA Low Dropout (LDO) voltage regulator manufactured by Micrel. It provides a fixed 1.2V output with ±2% accuracy and operates within a 2.5V to 5.5V input range. The device features a typical quiescent current of 38µA and delivers a PSRR of 70dB at 1kHz. It incorporates thermal-shutdown and current-limit protection. A distinguishing feature of the MIC5364 variant is the active auto-discharge circuit, which utilizes an internal 30Ω NFET to discharge output capacitors upon disable. It is housed in a compact 6-pin 1.2mm × 1.2mm Thin MLF® package.

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

• Integrates an active auto-discharge circuit that switches an internal 30Ω NFET from VOUT to GND to rapidly discharge output capacitors when disabled.
• Provides high power supply rejection ratio (PSRR) of 70dB at 1kHz for effective noise suppression in sensitive applications.
• Ensures stable operation with small 1µF ceramic input and output capacitors, optimizing board space requirements.
• Includes comprehensive protection mechanisms featuring linear current limiting and thermal shutdown to prevent damage during fault conditions.

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

• Mobile phones
• GPS systems
• Portable Media Players (PMP)
• Digital Still Cameras (DSC)
• Noise-sensitive battery-powered electronics

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required tape-and-reel packaging format. Ensure the ordering part number aligns with the intended fixed output voltage configuration. Cross-reference datasheet revisions to confirm compliance with current RoHS standards and lead-free specifications before finalizing procurement orders.

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

Select this regulator for designs requiring fast transient response and low output noise in portable devices. The MIC5364 variant is specifically indicated when automatic output capacitor discharge is necessary to meet system power-down timing requirements. Evaluate thermal dissipation constraints based on the junction-to-ambient resistance of the Thin MLF® package under maximum load conditions.

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

This component belongs to the MIC5363/4 family of µCap LDO regulators designed for ultra-small form factor applications. While the MIC5363 lacks the discharge feature, the MIC5364 adds the active auto-discharge capability. Both share identical electrical characteristics regarding current capacity, dropout voltage, and stability requirements, differing primarily in the shutdown behavior of the output stage.

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

MIC5363-1.2YMT-T5: Functionally equivalent but lacks the active auto-discharge feature; suitable if rapid capacitor discharge is not required.

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

What is the function of the active discharge circuit in the MIC5364?

When the enable pin is driven low, the MIC5364 activates an internal 30Ω NFET connected between the output and ground. This discharges external output capacitors quickly, ensuring the system voltage drops rapidly upon shutdown.

How does the MIC5364 differ from the MIC5363?

The primary difference is the inclusion of the active auto-discharge feature in the MIC5364. The MIC5363 does not contain this circuitry and will maintain the output voltage state or discharge only through external loads when disabled.