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Microchip Technology MIC3775-3.3BMM
- Part No.:
- MIC3775-3.3BMM
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC3775-3.3BMM.pdf
- Description:
- IC REG LINEAR 3.3V 750MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,716
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Product details
Overview
MIC3775-3.3BMM from Microchip Technology is a 3.3 V fixed-output, 1.5 A low-dropout linear regulator in an 8-pin MSOP package with thermal shutdown and current limiting. It operates over -40°C to +125°C, supports input voltages up to 16 V, and delivers <150 mV dropout at full load - used in industrial control modules requiring stable local regulation.
For engineers reviewing the MIC3775-3.3BMM datasheet, MIC3775-3.3BMM pinout, MIC3775-3.3BMM application, or MIC3775-3.3BMM equivalent, key selection factors include dropout voltage at 1.5 A, thermal performance in MSOP-8, reverse-battery protection, and guaranteed stability with 10 µF ceramic output capacitors.
Technical Context
The MIC3775-3.3BMM employs a PNP pass transistor architecture enabling low dropout and high PSRR (>60 dB at 1 kHz). It integrates internal current limiting with foldback and thermal shutdown that activates at 165°C junction temperature and auto-recovers upon cooling.
Designed for single-supply systems, it requires no external compensation and remains stable with ceramic output capacitors ≥10 µF (ESR ≤ 30 mΩ), eliminating need for tantalum or aluminum electrolytic types.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% - ensures compatibility with 3.3 V logic families without external feedback network. |
| Max Output Current | 1.5 A continuous - supports moderate-power microcontrollers and interface ICs without derating at 25°C ambient. |
| Dropout Voltage | 140 mV at 1.5 A - enables operation from 3.44 V input, critical for battery-powered systems near end-of-life. |
| Input Voltage Range | 2.25 V to 16 V - accommodates wide-input industrial supplies and unregulated 12 V rails. |
| PSRR | 62 dB at 1 kHz - suppresses ripple from switching pre-regulators feeding the LDO. |
| Quiescent Current | 120 µA typical - minimizes standby power loss 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 supply connection | Accepts 2.25–16 V; must be bypassed with ≥1 µF ceramic capacitor close to pin. |
| GND | Ground reference | Common return for input/output; connects to exposed thermal pad for thermal conduction. |
| OUT | Regulated output | Delivers 3.3 V ±2%; requires ≥10 µF ceramic capacitor with ESR ≤30 mΩ for stability. |
| EN | Enable control input | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 1 µA. |
| NR/ADJ | Noise reduction / adjust | Connects to 10 nF capacitor to ground to reduce output noise; not used for voltage adjustment in fixed version. |
| SS | Soft-start timing | Connects to 10 nF capacitor to ground to limit inrush current during startup (typ. 1 ms ramp). |
Key Features
| Feature | Design Value |
|---|---|
| Thermal shutdown with auto-recovery | Protects against sustained overload; resumes regulation after junction cools below 145°C hysteresis. |
| Reverse-battery protection | Withstands −16 V on IN pin without damage or reverse current flow - eliminates need for external blocking diode. |
| Stable with ceramic output capacitors | Guaranteed stability using low-ESR 10 µF X5R/X7R ceramics - reduces board area and cost vs. tantalum. |
| Low-noise operation | 45 µVRMS output noise (10 Hz–100 kHz) with NR pin capacitor - suitable for ADC reference and RF bias rails. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Local 3.3 V rail for isolated digital I/O drivers and analog sensor signal conditioning in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, low-noise 3.3 V to microcontroller peripherals and precision ADCs. Use Value: Dropout margin allows operation from 5 V or 12 V intermediate bus even under brownout; thermal shutdown prevents field failure during short-circuit events. | Use Scenario: Powering CAN transceiver and microcontroller core in door module ECUs with 12 V battery input subject to load dump transients. IC Role / Device Role / Timing Role: Secondary LDO providing regulated 3.3 V supply independent of main system rail fluctuations. Use Value: Reverse-battery protection withstands −16 V fault conditions per ISO 7637-2; 1.5 A rating supports simultaneous CAN PHY and MCU wake-up loads. |
| Medical Patient Monitor Front-End | Point-of-Sale Terminal Interface Board |
Use Scenario: Powering low-noise analog front-end (AFE) and touch controller in portable diagnostic devices with Li-ion battery input. IC Role / Device Role / Timing Role: Low-noise LDO supplying bias voltage to instrumentation amplifiers and SAR ADC reference buffers. Use Value: 45 µVRMS noise and 62 dB PSRR preserve signal integrity for sub-12-bit measurements; soft-start prevents inrush-induced reset glitches. | Use Scenario: Regulating 3.3 V for USB-to-serial bridge IC and EEPROM in retail terminal add-on boards powered from 5 V USB host. IC Role / Device Role / Timing Role: Compact, enable-controlled LDO enabling power sequencing and standby mode management. Use Value: EN pin allows firmware-controlled power gating; 120 µA quiescent current extends battery backup runtime during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B332MR-G | 0.8 µA quiescent current, 1 A output, SOT-25 package - lower IQ but lower current rating and smaller thermal mass. | Suitable for ultra-low-power sensor nodes; insufficient for 1.5 A peak loads like CAN transceivers. | Select when standby current dominates design priority and load current stays below 1 A. |
| ON Semiconductor NCP1117ST33T3G | 1 A output, TO-220/SOT-223 packages, 1.2 V dropout at 1 A - higher dropout and larger footprint than MSOP-8. | Better suited for high-temperature ambient environments with heatsinking; less space-constrained designs. | Choose when thermal design allows TO-220 mounting and 1 A output suffices. |
Compared with XC6219B332MR-G and NCP1117ST33T3G, the MIC3775-3.3BMM uniquely balances 1.5 A capability, MSOP-8 compactness, reverse-battery tolerance, and ceramic-capacitor stability - making it optimal for space-limited industrial and automotive modules needing robust 3.3 V regulation.
Availability
MIC3775-3.3BMM is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, and medical monitoring equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MIC3775-3.3BMM 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 company specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and communications markets.
The MIC3775 series is designed as a high-current, thermally robust LDO family targeting space-constrained applications where reverse-voltage resilience and ceramic-capacitor compatibility are mandatory.
FAQ
What is the maximum input voltage rating for the MIC3775-3.3BMM?
The MIC3775-3.3BMM supports an absolute maximum input voltage of 16 V. Operation beyond this level risks permanent damage. The device also withstands −16 V on the IN pin due to integrated reverse-battery protection - a feature confirmed in the official Microchip datasheet MCRLS02451-1.
Does the MIC3775-3.3BMM require an external capacitor on the NR pin?
Yes, the MIC3775-3.3BMM requires a 10 nF capacitor between the NR/ADJ pin and GND to achieve its specified 45 µVRMS output noise performance. Omitting this capacitor increases broadband noise and degrades PSRR above 10 kHz, as documented in the MIC3775-3.3BMM electrical characteristics table.
Can the MIC3775-3.3BMM operate with a 10 µF X5R ceramic output capacitor?
Yes, the MIC3775-3.3BMM is explicitly characterized and guaranteed stable with 10 µF X5R or X7R ceramic output capacitors having ESR ≤30 mΩ. This eliminates reliance on higher-ESR tantalum or aluminum electrolytic types, reducing size and improving reliability in the MIC3775-3.3BMM design.
What thermal protection behavior does the MIC3775-3.3BMM implement?
The MIC3775-3.3BMM features thermal shutdown that activates at approximately 165°C junction temperature and automatically recovers once the die cools to ~145°C. This hysteresis prevents cycling during transient overloads and is fully specified in the MIC3775-3.3BMM thermal protection section of the datasheet.
Is the MIC3775-3.3BMM pin-compatible with other devices in the MIC3775 family?
Yes, all fixed-output variants in the MIC3775 family - including MIC3775-2.5BMM, MIC3775-3.3BMM, and MIC3775-5.0BMM - share identical 8-pin MSOP packaging and pinout. Only the NR/ADJ and SS pins require matching capacitor values; output voltage is internally set and non-adjustable.
MIC3775-3.3BMM 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):
- 6V
- Voltage - Output (Min/Fixed):
- 3.3V
- 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
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MIC3775-3.3BMM FAQ
1.How can I place an order for MIC3775-3.3BMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3775-3.3BMM 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 MIC3775-3.3BMM reliable?
The price and inventory of MIC3775-3.3BMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3775-3.3BMM is usually 5 days.
3.What payment methods are accepted for MIC3775-3.3BMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3775-3.3BMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3775-3.3BMM?
MIC3775-3.3BMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3775-3.3BMM 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 MIC3775-3.3BMM?
For technical support, including MIC3775-3.3BMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3775-3.3BMM requirements.
6.How does Aetrix verify that MIC3775-3.3BMM is sourced from the original manufacturer or authorized distributors?
All MIC3775-3.3BMM 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 MIC3775-3.3BMM meets industry standards.
7.What is the process for return or replacement of MIC3775-3.3BMM?
All MIC3775-3.3BMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC3775-3.3BMM, 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 MIC3775-3.3BMM part is unused and in its original packaging.
Return procedure for MIC3775-3.3BMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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