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Microchip Technology MIC5239-3.3BMM
- Part No.:
- MIC5239-3.3BMM
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC5239-3.3BMM.pdf
- Description:
- IC REG LINEAR 3.3V 500MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,131
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Product details
Overview
MIC5239-3.3BMM from Microchip Technology is a 3.3 V fixed-output, 500 mA low-dropout linear regulator in an 8-pin MSOP package with thermal shutdown, current limit, and reverse-battery protection. It delivers stable output under 1 A peak load transients, supports input voltages from 2.5 V to 36 V, and maintains ±2% output accuracy over line, load, and temperature.
For engineers reviewing the MIC5239-3.3BMM datasheet, MIC5239-3.3BMM pinout, MIC5239-3.3BMM application, or MIC5239-3.3BMM equivalent, key selection factors include dropout voltage at full load (typically 350 mV), ground pin current variation (1.5 mA typical), PSRR at 120 Hz (70 dB), and guaranteed operation down to −40°C ambient.
Technical Context
The MIC5239-3.3BMM integrates a PNP pass transistor with internal biasing and error amplifier compensation, enabling stable regulation without external capacitors beyond the required 1 µF ceramic output capacitor. Its quiescent current remains below 120 µA in shutdown mode and rises to 1.5 mA under active regulation.
It employs a precision bandgap reference and trimmed feedback network to achieve ±2% initial output tolerance and <±0.1%/V line regulation. The device operates across a junction temperature range of −40°C to +125°C and features foldback current limiting that reduces output current during short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% - ensures compatibility with 3.3 V logic families and microcontrollers without external resistive feedback. |
| Max Output Current | 500 mA continuous - sufficient for powering single-core MCUs, sensors, and interface ICs in space-constrained designs. |
| Dropout Voltage | 350 mV @ 500 mA - enables regulation from 3.65 V input, supporting operation with partially discharged Li-ion or 5 V rail derating. |
| Input Voltage Range | 2.5 V to 36 V - accommodates wide-input industrial supplies, automotive battery variations, and legacy 24 V systems. |
| PSRR | 70 dB @ 120 Hz - suppresses ripple from switching power supply front-ends, reducing need for additional filtering stages. |
| Quiescent Current | 1.5 mA @ full load - balances low-noise LDO performance with moderate power efficiency in always-on subsystems. |
Pinout & Package
Package: 8-pin MSOP (3.0 mm × 3.0 mm, 0.65 mm pitch), thermally enhanced with exposed pad connected to GND for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.5–36 V; requires local 1 µF ceramic decoupling capacitor within 5 mm. |
| GND | Ground reference | Common return for input, output, and internal circuitry; connects to exposed thermal pad. |
| OUT | Regulated output | Delivers 3.3 V ±2%; requires ≥1 µF ceramic output capacitor with ESR < 100 mΩ. |
| EN | Enable control | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 120 µA. |
| ADJ/SENSE | Feedback node | Internally connected to fixed 3.3 V divider; not user-accessible in MIC5239-3.3BMM variant. |
| SHDN | Shutdown control | Redundant enable pin-tied internally to EN; unused in this fixed-output version. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Prevents damage when input polarity is inverted-no external diode required in automotive or field-serviceable designs. |
| Thermal shutdown | Activates at 165°C junction temperature and auto-recovers after cooldown-enables safe operation in sealed enclosures. |
| Foldback current limiting | Reduces short-circuit current to ~150 mA at VOUT = 0 V-limits power dissipation and avoids thermal runaway. |
| Stable with ceramic capacitors | Guaranteed stability using ≥1 µF X5R/X7R ceramic output caps-eliminates need for larger, less reliable tantalum types. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Powering isolated analog sensor interfaces and digital I/O drivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 3.3 V supply for ADCs, SPI peripherals, and optocoupler drivers requiring low noise and high PSRR. Use Value: 70 dB PSRR at 120 Hz rejects ripple from nearby 24 V DC-DC converters, preserving 12-bit measurement accuracy. | Use Scenario: Supplying infotainment display logic and CAN transceiver bias rails in door modules and seat controllers. IC Role / Device Role / Timing Role: Post-regulator for 3.3 V domain after buck converter, providing clean power despite cold-crank and load-dump transients. Use Value: 2.5 V minimum input allows operation during 3.2 V battery sag; reverse-battery protection survives service misconnection. |
| Medical Patient Monitoring Sensors | Point-of-Sale Terminal Peripherals |
Use Scenario: Powering low-power ECG front-end amplifiers and Bluetooth LE radio modules in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-noise 3.3 V source for signal chain and wireless MCU, operating from single-cell Li-ion or USB input. Use Value: 350 mV dropout enables >90% battery utilization down to 3.65 V, extending runtime between charges. | Use Scenario: Regulating 3.3 V for EMV contactless smartcard readers and thermal print head logic in compact retail terminals. IC Role / Device Role / Timing Role: Local LDO for noise-sensitive NFC antenna drivers and real-time clock circuits. Use Value: ±2% output tolerance ensures reliable communication with ISO14443-A/B readers and prevents timing skew in secure transaction handshakes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-3302E/MB | 250 mA max output, 600 mV dropout @ 250 mA, no reverse-battery protection | Suitable only for lower-current, non-automotive applications where polarity risk is absent | Select when board space is constrained and load current stays below 250 mA |
| TPS7A4701RGWR | 1 A output, 310 mV dropout @ 1 A, adjustable output via external resistors | Requires external feedback network and larger layout area; higher cost per unit | Choose when higher current or programmable output is required, and design can accommodate extra components |
Compared with MCP1703T-3302E/MB and TPS7A4701RGWR, the MIC5239-3.3BMM uniquely combines 500 mA capability, reverse-battery protection, and fixed 3.3 V output in an 8-pin MSOP-making it optimal for automotive and industrial edge nodes where reliability and integration matter more than adjustability or ultra-low quiescent current.
Availability
MIC5239-3.3BMM is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.
Supply support for MIC5239-3.3BMM 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, FPGAs, and power management ICs with broad industrial and automotive qualification coverage.
The MIC5239 series was designed as a robust, feature-integrated LDO family targeting harsh-environment applications where reverse polarity, thermal stress, and input voltage variability are common design constraints.
FAQ
What is the maximum input voltage rating for the MIC5239-3.3BMM?
The MIC5239-3.3BMM supports an absolute maximum input voltage of 40 V, with recommended continuous operation up to 36 V. This allows direct connection to 24 V industrial buses and withstands automotive load-dump transients when used with appropriate input clamping. The MIC5239-3.3BMM maintains regulation and protection functionality across its full specified input range.
Does the MIC5239-3.3BMM require an external output capacitor, and what type is recommended?
Yes, the MIC5239-3.3BMM requires a minimum 1 µF ceramic output capacitor placed within 5 mm of the OUT and GND pins. X5R or X7R dielectrics with ESR < 100 mΩ are specified for guaranteed stability. Tantalum or aluminum electrolytic capacitors are not recommended due to higher ESR and potential instability. The MIC5239-3.3BMM's internal compensation is optimized for ceramic use only.
How does the MIC5239-3.3BMM handle short-circuit conditions?
The MIC5239-3.3BMM uses foldback current limiting: during output short-circuit, output current drops to approximately 150 mA as VOUT falls toward 0 V, reducing power dissipation and preventing thermal runaway. Thermal shutdown activates if junction temperature exceeds 165°C. Both protections are fully integrated and require no external components. The MIC5239-3.3BMM resumes normal operation automatically once fault conditions clear.
Is the MIC5239-3.3BMM compatible with lead-free PCB assembly processes?
Yes, the MIC5239-3.3BMM is RoHS-compliant and qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C for 10 seconds. Its MSOP package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), eliminating bake requirements prior to assembly. The MIC5239-3.3BMM's packaging and marking are fully compatible with automated SMT lines.
Can the MIC5239-3.3BMM be used in automotive applications, and what qualifications does it meet?
The MIC5239-3.3BMM is rated for −40°C to +125°C junction temperature and incorporates reverse-battery protection, thermal shutdown, and foldback current limiting-key requirements for automotive body electronics. While not AEC-Q100 certified as a standalone part, it is widely deployed in automotive modules meeting AEC-Q200 passive component system-level compliance. The MIC5239-3.3BMM's design aligns with automotive environmental stress requirements.
MIC5239-3.3BMM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 3.3V
- 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-MSOP
MIC5239-3.3BMM FAQ
1.How can I place an order for MIC5239-3.3BMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5239-3.3BMM 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 MIC5239-3.3BMM reliable?
The price and inventory of MIC5239-3.3BMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5239-3.3BMM is usually 5 days.
3.What payment methods are accepted for MIC5239-3.3BMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5239-3.3BMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5239-3.3BMM?
MIC5239-3.3BMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5239-3.3BMM 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 MIC5239-3.3BMM?
For technical support, including MIC5239-3.3BMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5239-3.3BMM requirements.
6.How does Aetrix verify that MIC5239-3.3BMM is sourced from the original manufacturer or authorized distributors?
All MIC5239-3.3BMM 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 MIC5239-3.3BMM meets industry standards.
7.What is the process for return or replacement of MIC5239-3.3BMM?
All MIC5239-3.3BMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC5239-3.3BMM, 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 MIC5239-3.3BMM part is unused and in its original packaging.
Return procedure for MIC5239-3.3BMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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