Microchip Technology MIC5219-2.5BMM

Overview

MIC5219-2.5BMM from Microchip Technology is a 2.5 V fixed-output, 150 mA low-dropout (LDO) linear regulator in an 8-pin MSOP package with thermal shutdown and current limit protection; it features 35 µA quiescent current, 170 mV dropout at 150 mA, and ±2% output voltage accuracy for power management in space-constrained portable electronics.

For engineers reviewing the MIC5219-2.5BMM datasheet, MIC5219-2.5BMM pinout, MIC5219-2.5BMM application, or MIC5219-2.5BMM equivalent, key selection criteria include dropout voltage at load, ground current vs. load, line/load regulation performance, thermal behavior in 8-pin MSOP, and compatibility with ceramic output capacitors ≥1 µF.

Technical Context

The MIC5219-2.5BMM employs a PNP pass transistor architecture enabling stable regulation with minimal headroom; its internal bandgap reference and error amplifier deliver tight DC accuracy and transient response to load steps up to 100 mA/µs. It operates over input voltages from 2.5 V to 16 V and requires no external compensation.

Thermal foldback and short-circuit current limiting are integrated to protect under fault conditions; the device remains functional down to –40°C and up to +125°C junction temperature, supporting industrial-grade operation without derating below 100 mA at 85°C ambient.

Key Specifications

Pinout & Package

Package: 8-pin MSOP (3.0 mm × 3.0 mm, 0.65 mm pitch), thermally enhanced with exposed pad (EP) connected to GND for improved heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-2502E/TO and TSS721AIDR, the MIC5219-2.5BMM uniquely balances ultra-low dropout (170 mV), moderate IQ (35 µA), and compact MSOP-8 footprint-making it optimal for space- and headroom-constrained industrial and portable designs where ±2% accuracy and ceramic-capacitor stability are mandatory.

Availability

MIC5219-2.5BMM is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and wearable fitness trackers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MIC5219-2.5BMM 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and consumer applications.

The MIC5219 family delivers high-accuracy, low-noise LDO regulators optimized for battery-powered and noise-sensitive systems where small size and predictable thermal behavior are essential.

FAQ

What is the minimum input voltage required for MIC5219-2.5BMM to maintain regulation?

The MIC5219-2.5BMM requires a minimum input voltage of 2.67 V to sustain 2.5 V output at full 150 mA load, based on its 170 mV dropout specification. Below this, output voltage drops linearly with input; operation is guaranteed down to 2.5 V input only at zero load. Always verify margin using worst-case dropout data from the official Microchip datasheet.

Does MIC5219-2.5BMM require an external capacitor on the ADJ/SENSE pin?

No, the MIC5219-2.5BMM is a fixed-output variant with internal feedback; the ADJ/SENSE pin is not accessible or configurable. External capacitors are required only on IN (≥1 µF ceramic) and OUT (≥1 µF ceramic, ESR < 1 Ω), per Microchip's layout guidelines for stability and transient response.

Can MIC5219-2.5BMM operate with a 10 µF tantalum output capacitor instead of ceramic?

While the MIC5219-2.5BMM is optimized for ceramic capacitors (ESR < 1 Ω), it can function with 10 µF tantalum capacitors if ESR is within 0.5–1 Ω. However, Microchip specifies guaranteed stability only with ceramic types; tantalum use may degrade transient response and increase risk of oscillation under fast load steps.

Is the exposed pad (EP) on MIC5219-2.5BMM electrically connected internally?

Yes, the exposed pad (EP) on the MIC5219-2.5BMM is internally connected to GND. It must be soldered to a PCB GND plane to ensure proper thermal dissipation and EMI suppression; leaving it floating degrades thermal resistance by >30°C/W and increases output noise.

What is the typical thermal resistance (θ_JA) of MIC5219-2.5BMM in its MSOP-8 package?

The typical junction-to-ambient thermal resistance (θ_JA) of MIC5219-2.5BMM in the 8-pin MSOP package is 200°C/W with standard 2-layer PCB layout (1 in² copper, 1 oz). With 2 in² GND plane connected to the EP, θ_JA improves to ~85°C/W-enabling 150 mA continuous operation at 85°C ambient without derating.