Microchip Technology MIC5295-3.0YD

Overview

MIC5295-3.0YD from Micrel is a fixed 3.0V, 150mA low-dropout linear regulator with ultra-low ground current (18µA), 300mV dropout at full load, ±1.0% output accuracy, and reverse battery protection-designed for USB power supplies and portable electronics powered by 1–3-cell Li-ion batteries.

For engineers reviewing the MIC5295-3.0YD datasheet, MIC5295-3.0YD pinout, MIC5295-3.0YD application, or MIC5295-3.0YD equivalent, key selection criteria include input voltage range (2.3V–24V), thermal shutdown behavior, enable logic compatibility, ceramic capacitor stability (2.2µF min), and TO-252-5 package thermal resistance (50°C/W).

Technical Context

The MIC5295-3.0YD implements a µCap LDO architecture optimized for stability with low-ESR ceramic or tantalum output capacitors, eliminating need for electrolytic types. Its internal bandgap reference (1.24V) and precision error amplifier deliver high initial accuracy and excellent line/load regulation (0.04% and 0.25%, respectively).

It integrates active-high enable control with defined logic thresholds (V_IL = 0.4V, V_IH = 2.0V), thermal shutdown, current limiting (350–500mA), reverse battery protection, and reverse leakage protection-enabling robust operation in battery-backed and automotive environments where polarity reversal or wide VIN transients occur.

Key Specifications

Pinout & Package

Supplied in a 5-pin TO-252-5 (D-Pak) surface-mount package with exposed thermal pad (pin 3 connected to GND), offering 50°C/W junction-to-ambient thermal resistance and suitability for high-reliability PCB layouts with copper pour heatsinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3002E/TO and XC6206P302MR, the MIC5295-3.0YD provides superior reverse battery protection, wider input range (2.3V–24V), and integrated enable/shutdown-making it uniquely suited for portable, USB, and automotive systems demanding robustness and low standby power.

Availability

MIC5295-3.0YD is available at Aetrix Electronics and suitable for USB power supply design, cellular phone power management, and automotive infotainment systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for MIC5295-3.0YD 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.

The MIC5295 series was developed as a high-voltage, low-I_Q LDO family targeting portable and battery-powered systems needing wide-input, reverse-protected, ceramic-capacitor-stable regulation.

FAQ

What is the maximum input voltage rating for the MIC5295-3.0YD?

The MIC5295-3.0YD has an absolute maximum input voltage rating of 38V, with a recommended operating range of 2.3V to 24V. This wide input capability allows direct connection to multi-cell Li-ion batteries, 12V/24V industrial rails, and USB PD sources without external pre-regulation-making the MIC5295-3.0YD suitable for high-voltage portable and automotive applications.

Does the MIC5295-3.0YD require an external output capacitor, and what type is recommended?

Yes, the MIC5295-3.0YD requires a minimum 2.2µF output capacitor for stability. X7R or X5R dielectric ceramic capacitors are explicitly recommended due to their stable capacitance over temperature (±15% for X7R). The MIC5295-3.0YD is unstable with high-ESR types like Y5V or Z5U unless oversized, and its design eliminates need for tantalum or electrolytic alternatives-reducing board area and improving reliability.

How does the enable pin (EN) function on the MIC5295-3.0YD?

The EN pin on the MIC5295-3.0YD is an active-high logic input: applying ≥2.0V enables regulation, while ≤0.4V disables the output and reduces ground current to ≤1µA. The pin must never be left floating, as that causes indeterminate output state. This feature allows precise power sequencing and ultra-low-power sleep modes-key for battery longevity in portable devices using the MIC5295-3.0YD.

What protection features are integrated into the MIC5295-3.0YD?

The MIC5295-3.0YD integrates four critical protections: thermal shutdown (activates >150°C), current limiting (350–500mA), reverse battery protection (blocks conduction when VIN is negative), and reverse leakage protection (limits reverse current to <0.1µA at –15V). These features ensure safe operation in harsh environments such as automotive jump-starts, battery replacement errors, and sustained overload conditions-differentiating the MIC5295-3.0YD from basic LDOs.

Is the MIC5295-3.0YD stable with zero output load?

Yes, the MIC5295-3.0YD remains stable with no load-a verified characteristic confirmed in the datasheet's "No-Load Stability" section. This behavior is essential for applications like CMOS RAM keep-alive, RTC backup, and security key storage where the regulator may operate indefinitely without downstream current draw. Unlike many LDOs requiring minimum load resistors, the MIC5295-3.0YD eliminates that design constraint, simplifying schematics and reducing BOM count.