Microchip Technology MIC5302-3.0YMT-TR

Overview

MIC5302-3.0YMT-TR from Micrel is a 3.0V fixed-output, 150mA ultra-low dropout (ULDO™) CMOS linear regulator in a 4-pin 1.2mm × 1.6mm Thin MLF® package. It delivers 2% initial output accuracy, 50mV dropout at full load, and 120µV_RMS output noise-optimized for RF power stages in mobile phones, camera modules, and imaging sensors where board space and low-noise biasing are critical.

For engineers reviewing the MIC5302-3.0YMT-TR datasheet, MIC5302-3.0YMT-TR pinout, MIC5302-3.0YMT-TR application, or MIC5302-3.0YMT-TR equivalent, key selection criteria include dropout voltage at 150mA, zero-off-mode shutdown current (<2µA), thermal shutdown behavior, and compatibility with 1µF ceramic output capacitors without external compensation.

Technical Context

The MIC5302-3.0YMT-TR integrates a CMOS pass element with an error amplifier, reference, thermal shutdown, and current-limit circuitry in a single die. Its active-high enable input (EN) controls operation with logic-level thresholds (V_IL ≤ 0.2V, V_IH ≥ 1.1V), and it achieves 35µs turn-on time with a 1µF output capacitor.

It operates across 2.3V–5.5V input while maintaining regulation down to 50mV headroom at 150mA. Ground current remains stable at 85µA (typ.) under load and drops to <2µA in shutdown-enabling battery-sensitive portable systems to minimize quiescent drain.

Key Specifications

Pinout & Package

Package: 4-pin 1.2mm × 1.6mm Thin MLF® (MT) with exposed thermal pad (EPAD) internally connected to GND. Occupies only 1.92mm² PCB area-50% smaller than SC-70 and 2mm × 2mm MLF® packages.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6206P302MR and AP7361-30SG-7, the MIC5302-3.0YMT-TR uniquely balances ultra-small size (1.92mm²), ultra-low dropout (50mV), and industry-competitive noise (120µV_RMS)-making it optimal for space-constrained, battery-sensitive RF and imaging subsystems where every millivolt and square millimeter matters.

Availability

MIC5302-3.0YMT-TR is available at Aetrix Electronics and suitable for mobile phone RF power stages, digital camera image sensor biasing, and GPS receiver front-end designs requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.

Supply support for MIC5302-3.0YMT-TR 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

Micrel Inc. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015. It pioneered high-performance ULDO regulators for portable electronics.

The MIC5302 product line was engineered specifically for ultra-compact, low-noise power delivery in battery-powered imaging and RF subsystems-emphasizing minimal PCB footprint, sub-100mV dropout, and robust thermal protection in thin-profile packages.

FAQ

What is the maximum input voltage rating for the MIC5302-3.0YMT-TR?

The MIC5302-3.0YMT-TR has an absolute maximum input voltage of +6V, but its recommended operating range is +2.3V to +5.5V. Exceeding 5.5V may trigger internal protection or cause reliability issues. For sustained operation, keep VIN within this range-especially critical when powering from USB or boosted battery rails.

Does the MIC5302-3.0YMT-TR require an external output capacitor, and what type is recommended?

Yes, the MIC5302-3.0YMT-TR requires a minimum 1µF output capacitor for stability. X7R or X5R dielectric ceramic capacitors are strongly recommended due to their stable capacitance over temperature (±15% for X7R). Avoid Y5V/Z5U types, which can lose >50% capacitance across the operating range and risk instability.

How does the enable pin (EN) function on the MIC5302-3.0YMT-TR, and what happens if left unconnected?

The EN pin on the MIC5302-3.0YMT-TR is active-high: logic high (>1.1V) enables regulation; logic low (<0.2V) forces zero-off-mode shutdown (<2µA current draw). Leaving EN floating is prohibited-it may cause erratic output behavior or partial conduction. Always tie EN to a defined logic level via pull-up or microcontroller GPIO.

What thermal performance can be expected from the MIC5302-3.0YMT-TR at 150mA load?

With a 3.6V input and 3.0V output at 150mA, the MIC5302-3.0YMT-TR dissipates ~0.12W. Using its θ_JA of 173°C/W and T_J(MAX) = 125°C, the maximum ambient temperature is ~104°C for a minimum PCB footprint. Adding thermal vias under the EPAD significantly improves heat transfer and raises this limit.

Is the MIC5302-3.0YMT-TR compatible with ceramic input capacitors, and what value is required?

Yes, the MIC5302-3.0YMT-TR is fully compatible with low-ESR ceramic input capacitors. A 1µF ceramic capacitor placed directly between VIN and GND is mandatory for stability and high-frequency noise filtering. Additional small-value NPO capacitors (e.g., 10nF) are recommended in RF-sensitive designs to suppress GHz-range noise.