MIC5309-1.8YD6-TR

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

The MIC5309-1.8YD6-TR is a fixed-output low dropout regulator manufactured by Microchip Technology, providing a stable 1.8V output with a maximum current of 300mA. It operates within an input voltage range of 1.7V to 5.5V and features an ultra-low ground current of typically 23µA under full load. The device incorporates thermal shutdown and linear current limit protection. It utilizes a 6-pin TSOT-23 surface-mount package and supports an operating temperature range from -40°C to +125°C.

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

• Dual-input architecture utilizing separate VIN and BIAS supplies to minimize dropout voltage for enhanced system efficiency.
• Ultra-low quiescent current consumption that remains constant across varying load conditions to extend battery life.
• Integrated active-high enable pin allows the device to enter a zero-off-mode state with negligible current draw when disabled.

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

• Mobile phones
• Portable electronics
• GPS receivers

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

Verify the specific ordering suffix 'D6' confirms the TSOT-23 package variant rather than the MLF option. Confirm the '-1.8' designation matches the required 1.8V fixed output voltage. Ensure the '-TR' suffix aligns with reel packaging requirements for automated assembly processes.

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

Select this component for applications requiring high power supply rejection ratio and fast transient response. Verify that the external circuitry includes a minimum 1µF ceramic output capacitor to ensure stability. Consider the dual-supply requirement where the bias rail must be maintained between 2.5V and 5.5V for optimal performance.

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

This part belongs to the MIC5309 family of µCap low dropout regulators designed for low-voltage, DC-to-DC conversion. The series offers both adjustable and fixed output options in compact packages. The MIC5309 specifically targets cost-sensitive portable designs while maintaining high performance metrics typical of the ULDO™ technology line.

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

MIC5309-1.8YMT-TR provides identical electrical specifications but utilizes a 6-pin Thin MLF® package instead of the TSOT-23 form factor.

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

Does the MIC5309 require a minimum load current to maintain regulation?

No, unlike many other regulators, the MIC5309 does not require a minimum load current to maintain output voltage regulation.

What is the recommended value for the bypass capacitor on the BYP/ADJ pin?

A 0.01µF capacitor is recommended from the bypass pin to ground to reduce output voltage noise and improve ripple rejection.