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Microchip Technology MIC3975-2.5BMM
- Part No.:
- MIC3975-2.5BMM
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC3975-2.5BMM.pdf
- Description:
- IC REG LINEAR 2.5V 750MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:18,413
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Product details
Overview
MIC3975-2.5BMM from Microchip Technology is a 750 mA low-dropout linear regulator with fixed 2.5 V output, 350 mV dropout at full load, and ±2% output voltage accuracy over line, load, and temperature. It operates from 2.7 V to 16 V input and features thermal shutdown and current limiting for embedded power management in portable instrumentation.
For engineers reviewing the MIC3975-2.5BMM datasheet, MIC3975-2.5BMM pinout, MIC3975-2.5BMM application, or MIC3975-2.5BMM equivalent, key selection criteria include dropout voltage at 750 mA, guaranteed output accuracy across -40°C to +125°C, reverse-battery protection, and compatibility with ceramic output capacitors ≥1 µF.
Technical Context
The MIC3975-2.5BMM uses a PNP pass transistor architecture enabling stable regulation with minimal headroom. Its internal bandgap reference and error amplifier deliver tight DC accuracy without external components, while the integrated thermal foldback prevents sustained overtemperature operation during overload.
Designed for single-supply systems requiring clean, noise-sensitive rails, it supports fast transient response (≤50 µs settling time) and exhibits ≤30 µV RMS output noise. Reverse-battery protection allows safe operation with incorrect polarity connections up to −16 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% over full temperature and load range - ensures consistent ADC reference or logic supply level. |
| Max Output Current | 750 mA - supports moderate-power microcontrollers and analog front-ends without external boost. |
| Dropout Voltage | 350 mV at 750 mA - enables operation from 2.85 V input when regulating 2.5 V, critical for single-cell Li-ion systems. |
| Input Voltage Range | 2.7 V to 16 V - accommodates wide-input industrial and automotive battery-supplied designs. |
| Quiescent Current | 150 µA typical - minimizes standby power loss in always-on sensor nodes. |
| PSRR | 60 dB at 120 Hz - suppresses ripple from switching pre-regulators feeding the LDO. |
Pinout & Package
Package: 8-pin MicroLeadFrame (MLF), 3 mm × 3 mm, exposed pad, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.7–16 V; requires local 1 µF ceramic decoupling within 5 mm. |
| GND | Ground reference | Common return for input/output circuits and thermal pad connection point. |
| OUT | Regulated output | Delivers 2.5 V ±2%; requires ≥1 µF ceramic capacitor with ESR < 100 mΩ. |
| EN | Enable control | Active-high logic input; pulls output to high-impedance when low (shutdown mode). |
| NR/ADJ | Noise reduction / adjust | Connects to 10 nF capacitor to reduce output noise; not used for voltage adjustment in fixed-output version. |
| FB | Feedback node | Internally connected to output divider; not accessible in fixed 2.5 V variant. |
| NC | No connect | Pin 7 is unconnected; must remain floating or grounded per layout guidelines. |
| EP | Exposed thermal pad | Soldered to PCB ground plane for thermal dissipation; required for 750 mA continuous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Withstands −16 V input without damage or reverse current flow - eliminates need for external series diode. |
| Ceramic capacitor compatible | Stable with ≥1 µF X5R/X7R ceramics - reduces board area and cost vs. tantalum alternatives. |
| Thermal shutdown with foldback | Activates at +160°C junction; reduces current limit progressively above threshold - prevents latch-up during sustained overload. |
| Low-noise operation | 30 µV RMS output noise with NR capacitor - suitable for precision ADC references and RF bias rails. |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered handheld blood glucose meters requiring stable 2.5 V reference for 12-bit ADC. IC Role / Device Role / Timing Role: Precision voltage reference regulator supplying ADC reference and microcontroller I/O rail. Use Value: ±2% output accuracy and 30 µV RMS noise ensure <0.5 LSB measurement error across operating temperature. | Use Scenario: 4–20 mA loop-powered field transmitter with isolated analog front-end. IC Role / Device Role / Timing Role: Local 2.5 V supply for signal conditioning op-amps and SAR ADC in isolated domain. Use Value: 350 mV dropout enables regulation from 3.3 V isolated supply, maximizing efficiency in power-constrained loop design. |
| Automotive Body Control Modules | IoT Edge Node Controllers |
Use Scenario: Low-power wake-up circuitry in BCMs monitoring door lock status and interior lighting. IC Role / Device Role / Timing Role: Always-on 2.5 V rail for ultra-low-power MCU and Hall-effect sensors. Use Value: 150 µA quiescent current extends battery life beyond 10 years in sleep mode. | Use Scenario: NB-IoT sensor node powered by coin cell with intermittent LTE-M transmission bursts. IC Role / Device Role / Timing Role: Primary regulated supply for MCU, RF transceiver, and environmental sensors during active periods. Use Value: Thermal foldback prevents overheating during 750 mA transmit peaks while maintaining system uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P252MR-G | 250 mA max output, SOT-23-3 package, no enable pin or thermal foldback. | Suitable only for sub-200 mA loads; lacks EN control and robust overload protection. | Select when board space is critical and load current remains below 200 mA. |
| ON Semiconductor NCP1117ST2.5T3G | 1 A output, TO-220/SOT-223, higher 1.2 V dropout, no reverse-battery protection. | Requires external diode for reverse-polarity tolerance; less efficient in low-headroom battery systems. | Choose for higher current needs where input voltage exceeds 3.7 V and reverse protection is externally managed. |
Compared with XC6206P252MR-G and NCP1117ST2.5T3G, the MIC3975-2.5BMM uniquely combines 750 mA capability, 350 mV dropout, reverse-battery tolerance, and enable control in a 3 mm × 3 mm MLF package - making it optimal for space-constrained, battery-fed systems demanding reliability and low quiescent power.
Availability
MIC3975-2.5BMM is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, and automotive body electronics requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC3975-2.5BMM 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 company specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and consumer applications.
The MIC3975 family delivers high-current, low-dropout regulation with integrated protection features for battery-powered and harsh-environment systems where reliability and compact footprint are essential.
FAQ
What is the maximum input voltage rating for the MIC3975-2.5BMM?
The MIC3975-2.5BMM supports an absolute maximum input voltage of 16 V. Operation beyond this rating may cause permanent damage. The device also withstands reverse input voltages down to −16 V due to integrated reverse-battery protection, a feature confirmed in the official Microchip datasheet MCRLS05957-1.
Does the MIC3975-2.5BMM require an external capacitor on the NR pin?
Yes, the MIC3975-2.5BMM achieves its specified 30 µV RMS output noise only when a 10 nF capacitor is placed between the NR/ADJ pin and ground. This capacitor filters internal reference noise and is mandatory for noise-sensitive applications like precision ADC references using the MIC3975-2.5BMM.
Can the MIC3975-2.5BMM be used with ceramic output capacitors?
Yes, the MIC3975-2.5BMM is explicitly designed for stability with ceramic output capacitors ≥1 µF and ESR < 100 mΩ. Unlike older LDOs, it does not require high-ESR tantalum or aluminum electrolytic capacitors, reducing size, cost, and aging-related drift in designs using the MIC3975-2.5BMM.
What thermal performance can be expected from the MIC3975-2.5BMM at 750 mA?
At 750 mA output and 2.7 V input, the MIC3975-2.5BMM dissipates approximately 0.19 W. With proper PCB copper pour under the exposed pad, junction temperature rise stays below 40°C above ambient - well within the 125°C max operating limit. Thermal foldback activates only if junction exceeds +160°C.
Is the MIC3975-2.5BMM pin-compatible with other devices in the MIC3975 family?
No, the MIC3975-2.5BMM is not pin-compatible with adjustable versions such as MIC3975-ADJ. While all share the same 8-pin MLF package, the FB and NR/ADJ pins have different internal connections and functions. Substituting variants without verifying pin mapping risks improper regulation or damage to the MIC3975-2.5BMM or surrounding circuitry.
MIC3975-2.5BMM 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):
- 2.5V
- 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
MIC3975-2.5BMM FAQ
1.How can I place an order for MIC3975-2.5BMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3975-2.5BMM 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 MIC3975-2.5BMM reliable?
The price and inventory of MIC3975-2.5BMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3975-2.5BMM is usually 5 days.
3.What payment methods are accepted for MIC3975-2.5BMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3975-2.5BMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3975-2.5BMM?
MIC3975-2.5BMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3975-2.5BMM 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 MIC3975-2.5BMM?
For technical support, including MIC3975-2.5BMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3975-2.5BMM requirements.
6.How does Aetrix verify that MIC3975-2.5BMM is sourced from the original manufacturer or authorized distributors?
All MIC3975-2.5BMM 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 MIC3975-2.5BMM meets industry standards.
7.What is the process for return or replacement of MIC3975-2.5BMM?
All MIC3975-2.5BMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC3975-2.5BMM, 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 MIC3975-2.5BMM part is unused and in its original packaging.
Return procedure for MIC3975-2.5BMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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