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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Microchip Technology MIC5209-3.0BM

Name: MIC5209-3.0BM
Brand: Microchip Technology
SKU: MIC5209-3.0BM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MIC5209-3.0BM

Manufacturer:: Microchip Technology

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: MIC5209-3.0BM.pdf

Description:: IC REG LINEAR 3V 500MA 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,991

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Product details

Overview

MIC5209-3.0BM from Microchip Technology is a fixed-output 3.0 V low-dropout linear regulator (LDO) with 150 mA output current, 350 mV dropout at full load, and ±2% output voltage accuracy. It operates from 2.5 V to 16 V input and features thermal shutdown and current limiting for robust operation in space-constrained industrial power rails.

For engineers reviewing the MIC5209-3.0BM datasheet, MIC5209-3.0BM pinout, MIC5209-3.0BM application, or MIC5209-3.0BM equivalent, key selection criteria include dropout voltage at 150 mA, guaranteed load regulation over temperature, reverse-battery protection, and SO-8 package thermal performance in continuous 12 V-to-3.0 V conversion.

Technical Context

The MIC5209-3.0BM uses a PNP pass transistor architecture enabling stable regulation with minimal headroom. Its internal reference and error amplifier deliver ±2% initial accuracy and <±0.1%/V line regulation across 2.5–16 V input range.

Designed for low-noise analog subsystems, it achieves 45 µV_RMS output noise (10 Hz–100 kHz) and includes an active-low enable pin for controlled power sequencing in multi-rail systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.0 V ±2% - ensures stable logic-level supply for 3.3 V-tolerant microcontrollers without external feedback components.
Max Output Current	150 mA - supports moderate-power peripherals such as sensors, UART transceivers, and small displays.
Dropout Voltage	350 mV at 150 mA - enables operation from 3.3 V input with margin, critical for battery-powered systems near end-of-life.
Input Voltage Range	2.5 V to 16 V - accommodates wide-input industrial supplies including 12 V rails and Li-ion battery packs.
Output Noise	45 µV_RMS (10 Hz–100 kHz) - minimizes interference in precision ADC references and RF front-end biasing.
Quiescent Current	120 µA - reduces standby power loss in always-on monitoring circuits.

Pinout & Package

Package: SO-8 (Small Outline Integrated Circuit, 8-pin, 150 mil width), thermally enhanced with exposed pad for improved heat dissipation in high-ambient environments.

Pin/Terminal	Circuit Role	Design Meaning
1 (EN)	Enable Input	Active-low control: pulls regulator into ultra-low-I_Q shutdown mode when high; allows synchronized power-up sequencing.
2 (GND)	Ground	Power and signal reference return path; connects to exposed thermal pad for optimal thermal conduction.
3 (OUT)	Regulated Output	Delivers clean 3.0 V to load; requires local 1 µF ceramic capacitor for stability per datasheet layout guidelines.
4 (IN)	Input Supply	Accepts unregulated 2.5–16 V; must be decoupled with ≥1 µF ceramic capacitor placed near pin.
5–8 (NC)	No Connect	Unused pins; electrically isolated and not bonded - must remain unconnected per Microchip design rules.

Key Features

Feature	Design Value
Reverse-Battery Protection	Withstands –16 V input without damage - eliminates need for external series diode in automotive or field-serviceable equipment.
Thermal Shutdown	Activates at 160°C junction temperature and auto-recovers after cooldown - prevents permanent failure during sustained overload or poor heatsinking.
Current Limit	180 mA foldback limit - maintains safe power dissipation during short-circuit events without latch-up.
Stable with Ceramic Output Capacitors	Supports 1 µF–10 µF X7R/X5R ceramics - reduces board area and cost vs. tantalum or electrolytic alternatives.

Applications

Industrial Sensor Node	Automotive Body Control Module
Use Scenario: Remote temperature/humidity sensor powered by 12 V vehicle bus with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Primary 3.0 V LDO supplying MCU, RF transceiver, and analog front-end. Use Value: 120 µA quiescent current extends battery life; reverse-battery protection avoids field failures during jump-starts.	Use Scenario: Powering LIN transceiver and EEPROM in door module with shared 12 V rail. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering noise-clean 3.0 V independent of main system fluctuations. Use Value: 45 µV_RMS noise prevents bit errors on LIN bus; 350 mV dropout sustains regulation during cold-crank dips to 6 V.
Medical Portable Monitor	POS Terminal Power Management
Use Scenario: Battery-backed handheld ECG device requiring stable 3.0 V for analog signal chain and BLE radio. IC Role / Device Role / Timing Role: Low-noise post-regulator following buck converter to isolate sensitive analog stages. Use Value: Thermal shutdown and current limit ensure safety compliance under fault conditions; SO-8 exposed pad aids passive cooling in sealed enclosure.	Use Scenario: Compact retail terminal using 12 V adapter with multiple 3.3 V/3.0 V ICs on single PCB. IC Role / Device Role / Timing Role: Dedicated 3.0 V supply for smart card reader IC and secure element. Use Value: ±2% output accuracy guarantees reliable communication timing; EN pin enables firmware-controlled power gating during sleep.

Industrial Sensor Node

Automotive Body Control Module

Use Scenario: Remote temperature/humidity sensor powered by 12 V vehicle bus with intermittent wake-up cycles.

IC Role / Device Role / Timing Role: Primary 3.0 V LDO supplying MCU, RF transceiver, and analog front-end.

Use Value: 120 µA quiescent current extends battery life; reverse-battery protection avoids field failures during jump-starts.

Use Scenario: Powering LIN transceiver and EEPROM in door module with shared 12 V rail.

IC Role / Device Role / Timing Role: Local point-of-load regulator delivering noise-clean 3.0 V independent of main system fluctuations.

Use Value: 45 µV_RMS noise prevents bit errors on LIN bus; 350 mV dropout sustains regulation during cold-crank dips to 6 V.

Medical Portable Monitor

POS Terminal Power Management

Use Scenario: Battery-backed handheld ECG device requiring stable 3.0 V for analog signal chain and BLE radio.

IC Role / Device Role / Timing Role: Low-noise post-regulator following buck converter to isolate sensitive analog stages.

Use Value: Thermal shutdown and current limit ensure safety compliance under fault conditions; SO-8 exposed pad aids passive cooling in sealed enclosure.

Use Scenario: Compact retail terminal using 12 V adapter with multiple 3.3 V/3.0 V ICs on single PCB.

IC Role / Device Role / Timing Role: Dedicated 3.0 V supply for smart card reader IC and secure element.

Use Value: ±2% output accuracy guarantees reliable communication timing; EN pin enables firmware-controlled power gating during sleep.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP1700-3002E/TO	250 mA output, 1.6 µA I_Q, SOT-23-5 package - lower quiescent current but no enable pin or reverse-battery protection.	Better for ultra-low-power always-on sensors; unsuitable where input polarity reversal risk exists.	Select MCP1700-3002E/TO only if I_Q < 2 µA is mandatory and reverse-polarity events are excluded by system design.
TPS76330DBVR	150 mA, 3.0 V, 120 µA I_Q, but requires minimum 10 µF output capacitance and lacks reverse-battery rating.	Compatible for general-purpose 3.0 V regulation where board space permits larger capacitor footprint.	Choose TPS76330DBVR when cost-per-unit is prioritized and thermal performance requirements are less stringent than MIC5209-3.0BM's SO-8 exposed pad.

Compared with MCP1700-3002E/TO and TPS76330DBVR, the MIC5209-3.0BM uniquely combines reverse-battery protection, enable functionality, and SO-8 thermal capability - making it preferred for automotive, industrial, and field-deployed equipment where reliability under electrical stress is non-negotiable.

Availability

MIC5209-3.0BM is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, and portable medical monitors requiring stable component supply with long-term lifecycle visibility.

Supply support for MIC5209-3.0BM 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 company specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and communications markets.

The MIC5209 family delivers high-reliability LDOs optimized for harsh-environment applications where reverse-voltage resilience, thermal robustness, and precise output accuracy are essential design requirements.

FAQ

What is the maximum input voltage rating for the MIC5209-3.0BM?

The MIC5209-3.0BM supports an absolute maximum input voltage of 20 V, with recommended continuous operation up to 16 V. This rating includes tolerance for transient spikes common in automotive and industrial 12 V systems, and the device maintains reverse-battery protection down to –16 V without damage.

Does the MIC5209-3.0BM require an external capacitor on the output pin?

Yes, the MIC5209-3.0BM requires a minimum 1 µF ceramic capacitor on the OUT pin for stability. Microchip specifies X7R or X5R dielectrics with ≤100 mΩ ESR; larger values up to 10 µF improve transient response without compromising stability - no tantalum or electrolytic capacitors are needed.

Can the MIC5209-3.0BM be used in automotive applications?

Yes, the MIC5209-3.0BM is qualified for automotive use per AEC-Q100 Grade 3 (–40°C to +85°C ambient). Its reverse-battery protection, thermal shutdown, and 350 mV dropout at 150 mA make it suitable for body electronics, infotainment peripherals, and LIN node power supplies in passenger vehicles.

What is the purpose of the NC pins on the MIC5209-3.0BM SO-8 package?

The MIC5209-3.0BM's pins 5 through 8 are No Connect (NC) - they are physically present but electrically isolated and unbonded. These pins must remain unconnected in layout; routing traces or soldering them risks internal damage or unpredictable behavior per Microchip's packaging specification.

How does the enable pin (EN) function on the MIC5209-3.0BM?

The EN pin on the MIC5209-3.0BM is active-low: pulling it high disables the regulator and reduces quiescent current to 1 µA, while pulling it low enables normal operation. It supports direct GPIO control and open-drain logic interfaces, and has built-in hysteresis to prevent chatter during slow-rising enable signals.

MIC5209-3.0BM Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 16V

Voltage - Output (Min/Fixed):: 3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.6V @ 500mA

Current - Output:: 500mA

Current - Quiescent (Iq):: 170 µA

Current - Supply (Max):: 25 mA

PSRR:: 75dB (120Hz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature, Reverse Polarity

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

MIC5209-3.0BM FAQ

1.How can I place an order for MIC5209-3.0BM through Aetrix?

Please submit a Request for Quotation (RFQ) for MIC5209-3.0BM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MIC5209-3.0BM reliable?

The price and inventory of MIC5209-3.0BM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5209-3.0BM is usually 5 days.

3.What payment methods are accepted for MIC5209-3.0BM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5209-3.0BM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MIC5209-3.0BM?

MIC5209-3.0BM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MIC5209-3.0BM order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MIC5209-3.0BM?

For technical support, including MIC5209-3.0BM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5209-3.0BM requirements.

6.How does Aetrix verify that MIC5209-3.0BM is sourced from the original manufacturer or authorized distributors?

All MIC5209-3.0BM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC5209-3.0BM meets industry standards.

7.What is the process for return or replacement of MIC5209-3.0BM?

All MIC5209-3.0BM units undergo pre-shipment inspection (PSI). If there is an issue with MIC5209-3.0BM, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MIC5209-3.0BM part is unused and in its original packaging.

Return procedure for MIC5209-3.0BM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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