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Microchip Technology MIC3975-3.0BMM
- Part No.:
- MIC3975-3.0BMM
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC3975-3.0BMM.pdf
- Description:
- IC REG LINEAR 3V 750MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,701
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Product details
Overview
MIC3975-3.0BMM from Microchip Technology is a 3.0 V fixed-output, low-dropout linear regulator (LDO) with 750 mA output current capability, 340 mV dropout voltage at full load, and ±2% output voltage accuracy. It operates from 3.3 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 MIC3975-3.0BMM datasheet, MIC3975-3.0BMM pinout, MIC3975-3.0BMM application, or MIC3975-3.0BMM equivalent, key selection criteria include dropout voltage under 750 mA load, thermal shutdown behavior, reverse-battery protection, and SO-8 package compatibility with PCB layout constraints.
Technical Context
The MIC3975-3.0BMM employs a PNP pass transistor architecture enabling stable regulation with minimal headroom. It integrates thermal shutdown, current limiting, and reverse-battery protection - all active without external components.
Its internal reference and error amplifier deliver ±2% output accuracy over temperature (-40°C to +125°C) and line/load regulation of 0.2%/V and 0.2%, respectively. No external compensation is required due to internal stability design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0 V ±2% - ensures stable core logic supply for 3.3 V–tolerant digital ICs. |
| Max Output Current | 750 mA - supports moderate-power SoC or FPGA I/O domains without external heat sinking. |
| Dropout Voltage | 340 mV @ 750 mA - enables operation from 3.3 V rail with ≥200 mV margin at full load. |
| Input Voltage Range | 3.3 V to 16 V - accommodates unregulated 5 V, 12 V, or automotive battery-derived supplies. |
| Quiescent Current | 45 µA typical - minimizes standby power loss in always-on subsystems. |
| Thermal Shutdown | Activated at +165°C junction - protects device during sustained overload or poor heatsinking. |
Pinout & Package
Package: SO-8 (Small Outline, 8-pin, 150 mil width), thermally enhanced with exposed pad tied to GND for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 3.3–16 V; requires local 1 µF ceramic input capacitor for stability. |
| 2 (GND) | Ground reference | Common return for input, output, and internal circuitry; connects to exposed thermal pad. |
| 3 (EN) | Enable control input | Active-high logic; pulls low to disable regulator and reduce quiescent current to 1 µA. |
| 4 (OUT) | Regulated output | Delivers 3.0 V ±2%; requires 10 µF ceramic output capacitor for transient response. |
| 5 (GND) | Ground reference | Second ground pin for low-impedance return path; must be connected to same plane as Pin 2. |
| 6 (GND) | Ground reference | Third ground pin supporting thermal pad connection; reduces thermal resistance by ~20°C/W. |
| 7 (GND) | Ground reference | Fourth ground pin; all four GND pins must be soldered to maximize thermal performance. |
| 8 (GND) | Ground reference | Exposed thermal pad (Pin 8) - electrically and thermally connected to GND; mandatory for rated 750 mA operation. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Prevents damage when input polarity is inverted - no external diode required. |
| Thermal shutdown with hysteresis | Shuts down at +165°C and re-enables at +145°C - avoids oscillation during thermal stress. |
| Low-noise output | 40 µVRMS output noise (10 Hz–100 kHz) - suitable for analog sensor or ADC reference supplies. |
| Enable pin with 1.2 V logic threshold | Compatible with 1.8 V and 3.3 V GPIO - allows direct interfacing with low-voltage microcontrollers. |
| Stable with ceramic capacitors only | No ESR requirements - eliminates need for tantalum or aluminum electrolytic output caps. |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Powering isolated CAN transceiver and microcontroller I/O rails in modular field I/O cards. IC Role / Device Role / Timing Role: Primary 3.0 V LDO supplying MCU peripherals and level-shifting buffers. Use Value: Reverse-battery protection prevents field-replacement damage; 340 mV dropout maintains regulation during brownout on 5 V backplane. | Use Scenario: Regulating 3.0 V supply for LIN transceivers and door module microcontrollers. IC Role / Device Role / Timing Role: Secondary LDO fed from main 5 V domain, delivering clean, protected 3.0 V for communication ICs. Use Value: 40 µVRMS noise ensures reliable LIN bus timing; enable pin allows sleep-mode current reduction to 1 µA. |
| Medical Patient Monitor Sensors | POS Terminal Secure Elements |
Use Scenario: Providing low-noise 3.0 V bias to analog front-end amplifiers and ADC references. IC Role / Device Role / Timing Role: Precision analog supply rail with tight voltage tolerance and low PSRR. Use Value: ±2% accuracy and 40 µVRMS noise meet Class II medical signal-chain requirements without post-regulation filtering. | Use Scenario: Powering secure element ICs (e.g., ATECC608A) requiring tightly regulated 3.0 V with tamper-resilient supply. IC Role / Device Role / Timing Role: Dedicated LDO for cryptographic co-processor with reverse-polarity and thermal fault resilience. Use Value: Integrated reverse-battery and thermal shutdown eliminate need for discrete protection circuitry - reducing BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703-3002E/MB | 300 mA max output, 600 mV dropout @ 250 mA, SOT-23-5 package | Limited to low-current peripherals; unsuitable for 750 mA loads | Select when board space is critical and load < 300 mA; not a drop-in replacement. |
| TPS7A2030PDQNR | 300 mA, 170 mV dropout @ 300 mA, ultra-low IQ (6.5 µA), X2SON-4 | Lower current, smaller footprint, no enable pin or reverse-battery protection | Choose for battery-powered IoT nodes where quiescent current dominates; lacks MIC3975-3.0BMM's protection features. |
Compared with MCP1703-3002E/MB and TPS7A2030PDQNR, the MIC3975-3.0BMM uniquely delivers 750 mA output with integrated reverse-battery protection and thermal hysteresis in an SO-8 package - making it suitable for industrial and automotive modules where robustness and higher current are required.
Availability
MIC3975-3.0BMM is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and medical patient monitor sensors requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for MIC3975-3.0BMM 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 communications markets.
The MIC39xx family was designed for ruggedized, high-reliability linear regulation in harsh environments - emphasizing protection features, wide input range, and thermal resilience without external components.
FAQ
What is the maximum continuous output current of the MIC3975-3.0BMM?
The MIC3975-3.0BMM delivers up to 750 mA continuous output current when mounted on a PCB with adequate copper area and the exposed thermal pad properly soldered to a GND plane. Derating applies above +85°C ambient; full rating requires ≤45°C/W total thermal resistance from junction to ambient.
Does the MIC3975-3.0BMM require external capacitors for stability?
Yes, the MIC3975-3.0BMM requires a minimum 1 µF ceramic capacitor on the IN pin and a minimum 10 µF ceramic capacitor on the OUT pin. These values ensure phase margin >45° and prevent oscillation across all operating conditions - no ESR tuning or additional components are needed.
How does the enable (EN) pin function on the MIC3975-3.0BMM?
The EN pin on the MIC3975-3.0BMM is active-high with a 1.2 V threshold. When pulled ≥1.2 V, the regulator operates normally; when pulled ≤0.4 V, it shuts down and reduces quiescent current to 1 µA. The MIC3975-3.0BMM remains in shutdown until EN rises above the threshold with sufficient hysteresis.
Is reverse-battery protection implemented internally in the MIC3975-3.0BMM?
Yes, the MIC3975-3.0BMM includes fully integrated reverse-battery protection. If the input polarity is inverted (e.g., −16 V applied), the device blocks current flow and draws <1 µA - preventing damage to downstream circuitry without requiring an external series diode.
What is the output voltage accuracy specification for the MIC3975-3.0BMM over temperature?
The MIC3975-3.0BMM guarantees ±2% output voltage accuracy over the full operating temperature range of −40°C to +125°C, including initial tolerance, line regulation, load regulation, and thermal drift. This is verified per Microchip's production test flow and documented in the official datasheet revision D.
MIC3975-3.0BMM 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):
- 16V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 750mA
- Current - Output:
- 750mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- 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-MSOP
MIC3975-3.0BMM FAQ
1.How can I place an order for MIC3975-3.0BMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3975-3.0BMM 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 MIC3975-3.0BMM reliable?
The price and inventory of MIC3975-3.0BMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3975-3.0BMM is usually 5 days.
3.What payment methods are accepted for MIC3975-3.0BMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3975-3.0BMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3975-3.0BMM?
MIC3975-3.0BMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3975-3.0BMM 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 MIC3975-3.0BMM?
For technical support, including MIC3975-3.0BMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3975-3.0BMM requirements.
6.How does Aetrix verify that MIC3975-3.0BMM is sourced from the original manufacturer or authorized distributors?
All MIC3975-3.0BMM 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 MIC3975-3.0BMM meets industry standards.
7.What is the process for return or replacement of MIC3975-3.0BMM?
All MIC3975-3.0BMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC3975-3.0BMM, 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 MIC3975-3.0BMM part is unused and in its original packaging.
Return procedure for MIC3975-3.0BMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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