Microchip Technology MIC5501-3.0YMT-TZ

Overview

MIC5501-3.0YMT-TZ from Microchip Technology is a 3.0V fixed-output, 300 mA low-dropout linear regulator in a 4-lead 1.0 mm × 1.0 mm thin DFN package. It delivers ±2% output accuracy, 160 mV dropout at full load, and 38 μA quiescent current, enabling stable power for battery-sensitive portable electronics such as medical wearables and GPS modules.

For engineers reviewing the MIC5501-3.0YMT-TZ datasheet, MIC5501-3.0YMT-TZ pinout, MIC5501-3.0YMT-TZ application, or MIC5501-3.0YMT-TZ equivalent, key selection criteria include guaranteed 300 mA output under 2.5–5.5 V input, stability with 1 μF ceramic capacitors, thermal shutdown protection, and operation across –40°C to +125°C junction temperature.

Technical Context

The MIC5501-3.0YMT-TZ is a general-purpose LDO without auto-discharge or internal enable pull-down-distinct from MIC5502/3/4 variants. Its CMOS-based control architecture enables ultra-low ground current (38 μA typ.) and fast 50 μs turn-on time while maintaining regulation down to zero load.

Designed for compact portable systems, it operates with minimal external components: only 1 μF input and 1 μF output ceramic capacitors are required. Its 250°C/W junction-to-ambient thermal resistance mandates careful ambient temperature management above 65°C at 300 mA load with 0.8 V dropout.

Key Specifications

Pinout & Package

Package: 4-Lead 1.0 mm × 1.0 mm Thin DFN (MT), exposed thermal pad (EP) to be connected to GND for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MIC5504-3.0YMT-TZ, the MIC5501-3.0YMT-TZ provides lower quiescent current and simpler enable interface but lacks auto-discharge; versus XC6210B302MR-G, it trades 13 μA lower IQ for stronger PSRR (60 dB vs. 55 dB) and broader industrial temperature validation.

Availability

MIC5501-3.0YMT-TZ is available at Aetrix Electronics and suitable for medical wearables, portable GPS modules, smartphone subsystems, and industrial sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MIC5501-3.0YMT-TZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a global provider of microcontrollers, analog, FPGA, and power management ICs, with a focus on embedded control and connectivity solutions.

The MIC5501 family is designed as a high-performance, ultra-compact LDO series targeting space- and power-constrained portable electronics, emphasizing low IQ, small footprint, and wide-input-voltage operation.

FAQ

What is the maximum input voltage rating for the MIC5501-3.0YMT-TZ?

The MIC5501-3.0YMT-TZ has an absolute maximum input voltage of +6 V, but its specified operating input range is +2.5 V to +5.5 V. Exceeding 5.5 V may cause permanent damage or unpredictable behavior, even briefly. For reliable operation in 5 V systems, ensure transient spikes remain below 6 V using appropriate input filtering or clamping.

Does the MIC5501-3.0YMT-TZ include an auto-discharge function on the output pin?

No, the MIC5501-3.0YMT-TZ does not include an auto-discharge function. That feature is exclusive to MIC5502 and MIC5504 variants. When disabled, MIC5501-3.0YMT-TZ leaves VOUT floating-external discharge circuitry is required if rapid output voltage decay is needed after shutdown.

Can the enable pin (EN) of the MIC5501-3.0YMT-TZ be left unconnected?

No, the EN pin of the MIC5501-3.0YMT-TZ must not be left floating. It uses CMOS input structure with no internal pull-down; a floating EN pin can result in indeterminate output state or unintended toggling. Always tie EN to a defined logic-high or logic-low source, or use a pull-up/pull-down resistor per system requirements.

What is the recommended output capacitor for stable operation of the MIC5501-3.0YMT-TZ?

The MIC5501-3.0YMT-TZ requires a minimum 1 μF ceramic output capacitor with low ESR-X5R or X7R dielectric preferred. Larger values do not improve stability or transient response significantly. Y5V or Z5U dielectrics are discouraged due to severe capacitance loss over temperature, risking instability at extremes.

Is the MIC5501-3.0YMT-TZ suitable for powering RF transmitter circuits?

No, the MIC5501-3.0YMT-TZ is explicitly stated as unsuitable for RF transmitter systems. Its PSRR and noise performance, while adequate for receivers and baseband, do not meet the stringent spectral purity requirements of RF power amplifiers or direct-conversion transmitters where phase noise and spurious emissions are critical.