MIC5303-1.5YMT

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

The MIC5303-1.5YMT is a single-channel, fixed-output Low Dropout (LDO) linear voltage regulator manufactured by Micrel Inc. It provides a stable 1.5V output with a maximum continuous current capability of 300mA. The device operates within an input voltage range of 1.7V to 5.5V and features an ultra-low dropout voltage of approximately 200mV at full load. It maintains a low quiescent current of 40µA and ensures stability when used with small ceramic capacitors, specifically requiring only 1µF on the output. The regulator includes integrated thermal shutdown and current limit protection mechanisms.

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

• Ultra-Low Dropout Performance: Maintains regulation with minimal voltage difference between input and output, enhancing efficiency in battery-powered systems.
• High Power Supply Rejection Ratio (PSRR): Provides effective suppression of power supply noise and ripple across a wide frequency range.
• Stable with Small Capacitors: Designed for stability with miniature 1µF ceramic output capacitors, reducing board space and component costs.
• Integrated Protection Circuits: Includes thermal shutdown and current limiting to safeguard the device under overload or high-temperature conditions.

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

• Portable consumer electronics such as mobile phones and PDAs
• GPS receivers and navigation modules
• Battery-operated handheld devices
• General-purpose low-noise power supplies for digital loads

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

Verify the manufacturer origin carefully, as Micrel was acquired by Microchip Technology. Ensure the specific suffix matches the required package type and tape/reel configuration. Confirm RoHS compliance status and check for any obsolescence notices from the current manufacturer before finalizing procurement plans.

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

Select this component when a compact, single-rail LDO is needed for applications requiring up to 300mA with a 1.5V output. It is suitable for designs prioritizing low dropout performance and small footprint over adjustable voltage flexibility. Ensure the input voltage remains above the minimum operating threshold while accounting for dropout requirements under maximum load conditions.

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

This part belongs to the MIC530x series of Ultra Low Dropout regulators known for their µCap technology, which allows stability with very small output capacitors. The series is designed for portable electronics where space and power efficiency are critical constraints. It complements other variants in the family that offer different output voltages or dual-channel configurations.

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

Direct substitutes include MIC5303-1.8YMT or MIC5303-2.5YMT if different fixed output voltages are acceptable. For equivalent performance with different pinouts or packages, consult the Microchip MIC530x family datasheet for cross-reference options ensuring matching current and dropout specifications.

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

What is the minimum recommended output capacitor for the MIC5303-1.5YMT?

The device is stable with a minimum output capacitance of 1µF ceramic capacitor.

Does the MIC5303-1.5YMT have an enable pin?

No, the standard MIC5303-1.5YMT is a fixed-output regulator without an external enable control pin.