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Microchip Technology MIC5239-2.5BM
- Part No.:
- MIC5239-2.5BM
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC5239-2.5BM.pdf
- Description:
- IC REG LINEAR 2.5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,587
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Product details
Overview
MIC5239-2.5BM from Microchip Technology is a fixed-output 2.5 V low-dropout linear regulator (LDO) with 500 mA output current capability, 350 mV dropout voltage at full load, and ±2% output voltage accuracy over line, load, and temperature. It operates from 2.5 V to 16 V input and is used in point-of-load regulation for microcontroller cores and FPGA I/O banks.
For engineers reviewing the MIC5239-2.5BM datasheet, MIC5239-2.5BM pinout, MIC5239-2.5BM application, or MIC5239-2.5BM equivalent, key selection criteria include dropout voltage at 500 mA, thermal shutdown behavior, reverse-current protection, and SOIC-8 package compatibility with PCB layout constraints for high-current LDOs.
Technical Context
The MIC5239-2.5BM integrates a PNP pass transistor with internal current limiting and thermal foldback. Its feedback loop is internally compensated for stability with 1 µF ceramic output capacitance, eliminating need for ESR-based compensation networks.
It features active-low enable control, built-in reverse-battery protection, and no external components required for basic operation beyond input/output capacitors. The device does not require bypass capacitor on the ADJ pin since it is a fixed-output variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% over -40°C to +125°C, suitable for powering 2.5 V logic rails without external resistors. |
| Max Output Current | 500 mA continuous; enables direct supply to mid-power digital ICs without derating at 25°C ambient. |
| Dropout Voltage | 350 mV at 500 mA; allows operation from 2.85 V input while maintaining regulation, critical for battery-powered systems. |
| Input Voltage Range | 2.5 V to 16 V; supports wide-input industrial and automotive power rails including 12 V nominal systems. |
| Quiescent Current | 120 µA typical; minimizes standby power loss in always-on subsystems such as real-time clocks or sensor interfaces. |
| PSRR @ 1 kHz | 70 dB; suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
Pinout & Package
Package: 8-pin SOIC (SOIC-8, 150 mil width), JEDEC MS-012AC, body size 4.9 mm × 3.9 mm, 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable Input | Active-low logic control; pulls high internally via 100 kΩ resistor; enables regulator when ≤0.4 V. |
| 2 (GND) | Ground | Power and signal reference; requires low-impedance connection to minimize output noise and thermal resistance. |
| 3 (OUT) | Regulated Output | Delivers up to 500 mA; requires ≥1 µF ceramic capacitor placed within 5 mm for stability. |
| 4 (OUT) | Regulated Output | Second output pin for high-current routing; shares same node as Pin 3; reduces trace resistance and voltage drop. |
| 5 (IN) | Input Supply | Accepts 2.5–16 V; requires local 1 µF ceramic capacitor; sensitive to input ripple above 100 kHz. |
| 6 (IN) | Input Supply | Second input pin for high-current routing; shares same node as Pin 5; lowers effective input impedance. |
| 7 (GND) | Ground | Secondary ground pin; must be connected to same ground plane as Pin 2 to maintain thermal and noise performance. |
| 8 (GND) | Ground | Third ground pin; improves thermal dissipation and reduces ground bounce in high-dI/dt applications. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-Battery Protection | Prevents damage and reverse current flow when input polarity is inverted-no external diode required. |
| Thermal Shutdown with Hysteresis | Shuts down at 165°C junction temperature and re-enables at 140°C, preventing thermal cycling in enclosed enclosures. |
| Current Limit Foldback | Reduces short-circuit current from 600 mA to 100 mA as output voltage collapses, limiting power dissipation during fault. |
| Stable with Ceramic Capacitors | Guaranteed stable with 1 µF X7R or better ceramic output capacitor-no ESR requirements simplify BOM and layout. |
Applications
| Industrial PLC I/O Modules | FPGA Configuration Power |
|---|---|
Use Scenario: Powering 2.5 V I/O banks of programmable logic controllers in factory automation cabinets with 12 V backplane supply. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, low-noise 2.5 V to FPGA I/O banks and isolated communication peripherals. Use Value: 350 mV dropout enables reliable regulation even as 12 V rail sags to 2.85 V during brownout events. | Use Scenario: Supplying configuration voltage to Spartan-7 and Artix-7 FPGA banks during boot and runtime operation. IC Role / Device Role / Timing Role: Fixed-output LDO providing stable 2.5 V for FPGA I/O banks requiring tight voltage tolerance and fast transient response. Use Value: ±2% output accuracy ensures compliance with Xilinx FPGA VCCO specification across temperature and load variation. |
| Medical Sensor Signal Chain | Automotive Body Control Module |
Use Scenario: Powering precision analog front-ends (AFE) and ADC drivers in portable patient monitors with Li-ion battery input. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO supplying 2.5 V reference and bias rails for 24-bit delta-sigma ADCs. Use Value: 70 dB PSRR at 1 kHz rejects switching noise from adjacent buck converters, preserving ENOB in sensor measurements. | Use Scenario: Regulating 2.5 V for LIN transceiver logic and microcontroller I/O in under-hood body control units with 12 V battery input. IC Role / Device Role / Timing Role: Robust LDO with reverse-battery and thermal protection operating in harsh automotive environments (-40°C to +125°C). Use Value: Built-in reverse-battery protection eliminates need for external series diode, reducing BOM cost and forward voltage drop. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703-2502E/TO | TO-220 package, 250 mA output, 600 mV dropout at full load, no enable pin. | Limited to lower-current applications; unsuitable for 500 mA FPGA I/O loads. | Select when board space allows TO-220 and thermal mass suffices for lower-power use cases. |
| TSS721AIDR | SOIC-8, 500 mA, but fixed 3.3 V output only; no 2.5 V variant available. | Cannot replace MIC5239-2.5BM in 2.5 V rail designs without redesigning voltage domain. | Consider only if system can migrate to 3.3 V I/O standard and tolerate higher dropout. |
Compared with MCP1703-2502E/TO and TSS721AIDR, the MIC5239-2.5BM uniquely delivers 500 mA at 2.5 V with 350 mV dropout in SOIC-8, enabling compact, thermally efficient 2.5 V point-of-load regulation where both voltage level and current capability are non-negotiable.
Availability
MIC5239-2.5BM is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA configuration power supplies, and medical sensor signal chains requiring stable component supply and long-term manufacturability.
Supply support for MIC5239-2.5BM 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 MIC5239 family was designed specifically for high-current, low-dropout regulation in space-constrained embedded systems requiring robust thermal and fault protection without external components.
FAQ
What is the maximum input voltage rating for the MIC5239-2.5BM?
The MIC5239-2.5BM supports an absolute maximum input voltage of 20 V, though its recommended operating range is 2.5 V to 16 V. Exceeding 16 V may reduce reliability or trigger overvoltage protection in some batches. Always verify actual stress limits using Microchip's latest datasheet revision for MIC5239-2.5BM before designing into 18–20 V systems.
Does the MIC5239-2.5BM require an external capacitor on the enable pin?
No, the MIC5239-2.5BM does not require an external capacitor on the enable (EN) pin. Its EN input has an internal pull-up resistor and is CMOS-compatible. Adding external RC filtering is optional and only needed if noise immunity in electrically noisy environments is required-MIC5239-2.5BM itself functions correctly with direct logic-level control.
Can the MIC5239-2.5BM be used with tantalum output capacitors?
Yes, the MIC5239-2.5BM is stable with tantalum output capacitors, but ceramic capacitors are preferred due to lower ESR and superior transient response. If using tantalum, ensure minimum 10 µF capacitance and ESR between 0.1 Ω and 1 Ω per Microchip's design guidelines for MIC5239-2.5BM-excessive ESR may degrade load regulation.
How does thermal performance differ between single-ground and multi-ground pin configurations in the MIC5239-2.5BM?
The MIC5239-2.5BM's three ground pins (Pins 2, 7, 8) reduce thermal resistance by up to 15°C/W versus a single-ground SOIC-8 LDO. Proper PCB layout-using ≥2 cm² copper pour connected to all three GND pins-lowers junction-to-ambient θJA from 120°C/W to ~85°C/W, enabling full 500 mA output at +85°C ambient without derating.
Is the MIC5239-2.5BM qualified for automotive AEC-Q100 Grade 2?
No, the MIC5239-2.5BM is not AEC-Q100 qualified. It is rated for industrial temperature range (–40°C to +125°C) but lacks automotive qualification documentation, stress test reports, or part numbering suffix indicating AEC compliance. For automotive body control modules, Microchip offers the AEC-Q100 qualified MIC5239-2.5BM-TR variant-verify exact suffix and qualification status before automotive deployment.
MIC5239-2.5BM 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):
- 30V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 500mA (Typ)
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 45 µA
- Current - Supply (Max):
- 15 mA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Over Voltage, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MIC5239-2.5BM FAQ
1.How can I place an order for MIC5239-2.5BM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5239-2.5BM 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 MIC5239-2.5BM reliable?
The price and inventory of MIC5239-2.5BM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5239-2.5BM is usually 5 days.
3.What payment methods are accepted for MIC5239-2.5BM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5239-2.5BM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5239-2.5BM?
MIC5239-2.5BM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5239-2.5BM 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 MIC5239-2.5BM?
For technical support, including MIC5239-2.5BM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5239-2.5BM requirements.
6.How does Aetrix verify that MIC5239-2.5BM is sourced from the original manufacturer or authorized distributors?
All MIC5239-2.5BM 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 MIC5239-2.5BM meets industry standards.
7.What is the process for return or replacement of MIC5239-2.5BM?
All MIC5239-2.5BM units undergo pre-shipment inspection (PSI). If there is an issue with MIC5239-2.5BM, 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 MIC5239-2.5BM part is unused and in its original packaging.
Return procedure for MIC5239-2.5BM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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