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Microchip Technology MIC3975-1.65BMM
- Part No.:
- MIC3975-1.65BMM
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC3975-1.65BMM.pdf
- Description:
- IC REG LINEAR 1.65V 750MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,994
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Product details
Overview
MIC3975-1.65BMM from Microchip Technology is a 750 mA low-dropout linear regulator with fixed 1.65 V output, 350 mV dropout at full load, and ±2% output voltage accuracy over line, load, and temperature. It operates from 2.25 V to 16 V input and integrates thermal shutdown and current limiting for reliable power delivery in space-constrained embedded systems.
For engineers reviewing the MIC3975-1.65BMM datasheet, MIC3975-1.65BMM pinout, MIC3975-1.65BMM application, or MIC3975-1.65BMM equivalent, key selection criteria include dropout voltage at 750 mA, guaranteed 1.65 V output tolerance, thermal performance in MSOP-8, and compatibility with low-noise analog rails requiring minimal external components.
Technical Context
The MIC3975-1.65BMM uses a PNP pass transistor architecture enabling stable regulation with no minimum load requirement and inherent short-circuit protection. Its internal bandgap reference and error amplifier deliver tight DC accuracy and low output noise (45 µVRMS) without external compensation.
Designed for single-supply operation, it supports reverse-battery protection and features logic-compatible enable control (active-high EN pin), allowing precise power sequencing in multi-rail systems where 1.65 V supplies interface with low-voltage FPGAs or memory I/O banks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.65 V ±2% - ensures compatible biasing for 1.8 V I/O domains operating at reduced voltage margins. |
| Max Output Current | 750 mA - sufficient to power multiple low-voltage logic devices or small microcontroller cores. |
| Dropout Voltage | 350 mV at 750 mA - enables operation from 2 V sources while maintaining regulation, critical for battery-backed systems. |
| Input Voltage Range | 2.25 V to 16 V - accommodates wide-input industrial supplies and unregulated wall adapters. |
| Ground Pin Current | 1.5 mA typical - minimizes quiescent loss in always-on subsystems. |
| PSRR | 60 dB at 120 Hz - suppresses ripple from upstream switching converters feeding mixed-signal circuits. |
Pinout & Package
Package: MSOP-8 (3 mm × 3 mm, 0.65 mm pitch), thermally enhanced with exposed pad for improved heat dissipation in high-current operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply connection | Accepts 2.25–16 V; requires local 1 µF ceramic bypass capacitor for stability. |
| GND | Power ground reference | Common return path; must be connected to exposed pad for thermal and electrical integrity. |
| OUT | Regulated output terminal | Delivers 1.65 V ±2%; requires 2.2 µF ceramic output capacitor for phase margin. |
| EN | Enable control input | Active-high logic interface; pulls output to zero when low, enabling power sequencing. |
| ADJ/SENSE | Feedback node | Internally tied to 1.65 V reference; not user-accessible in fixed-output variant. |
| NC | No-connect | Pins 5 and 7 are unused; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 350 mV at full 750 mA load enables use with weak or aging batteries without brownout. |
| No minimum load requirement | Stable regulation down to 0 mA allows use in intermittent wake/sleep systems without dummy loads. |
| Reverse-battery protection | Withstands −16 V on IN without damage - eliminates need for external blocking diode in automotive environments. |
| Low output noise | 45 µVRMS (10 Hz–100 kHz) preserves signal integrity in ADC reference or PLL supply rails. |
Applications
| FPGA I/O Bank Supply | Industrial Sensor Signal Chain |
|---|---|
Use Scenario: Powering 1.65 V I/O banks of Xilinx Artix-7 or Intel Cyclone V FPGAs in reconfigurable logic modules. IC Role / Device Role / Timing Role: Primary low-noise, tightly regulated voltage source for configurable logic I/O interfaces. Use Value: Maintains VIH/VIL margins under dynamic load transients, preventing setup/hold violations during high-speed data capture. | Use Scenario: Supplying precision op-amps and 16-bit SAR ADCs in factory-floor temperature and pressure transmitters. IC Role / Device Role / Timing Role: Clean analog rail generator decoupled from noisy digital supplies. Use Value: Limits added noise to <0.003% FS error in 24-bit measurement systems using external reference buffers. |
| Low-Power Wireless MCU Core | Automotive Body Control Module |
Use Scenario: Providing core voltage to Nordic nRF52840 or Silicon Labs EFR32BG22 during active BLE advertising bursts. IC Role / Device Role / Timing Role: Efficient linear regulator supporting burst-mode operation with fast transient response. Use Value: Delivers 750 mA peak current within 10 µs of load step while holding output deviation <±25 mV. | Use Scenario: Regulating 1.65 V supply for LIN transceiver biasing and EEPROM interface logic in door module ECUs. IC Role / Device Role / Timing Role: Protected, fault-tolerant LDO for safety-critical sub-systems with reverse-battery immunity. Use Value: Survives −16 V jump-start conditions without latch-up or parameter shift, ensuring ASIL-B compliance support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B162MR-G | Fixed 1.6 V output, 300 mA max, SOT-25 package - lower current, tighter 1% tolerance. | Suitable only for ultra-low-power sensors or RTC backup rails, not FPGA I/O or burst-mode MCUs. | Select when 1.6 V matches system spec and thermal budget limits MSOP-8 use. |
| ON Semiconductor NCP1117ST16T3G | Fixed 1.6 V output, 1 A max, SOT-223 package - higher current but 1.2 V minimum input, no reverse-battery protection. | Requires external diode for automotive reverse-polarity survival; larger footprint impacts dense PCB layouts. | Choose only if board area permits SOT-223 and reverse-battery events are excluded by system design. |
Compared with XC6219B162MR-G and NCP1117ST16T3G, the MIC3975-1.65BMM uniquely combines 750 mA capability, 1.65 V output, reverse-battery immunity, and MSOP-8 thermal performance - making it the only option for compact, robust 1.65 V rails in automotive and industrial edge nodes.
Availability
MIC3975-1.65BMM is available at Aetrix Electronics and suitable for FPGA power management, industrial sensor signal chains, low-power wireless MCU designs, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MIC3975-1.65BMM 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 MIC39xx LDO family was engineered for high-reliability embedded systems demanding precise low-voltage regulation, reverse-polarity resilience, and minimal external components - especially where space, thermal headroom, and fault tolerance are constrained.
FAQ
What is the maximum junction temperature rating for the MIC3975-1.65BMM?
The MIC3975-1.65BMM has a maximum junction temperature of +125 °C, validated per Microchip's thermal characterization in MSOP-8 with exposed pad soldered to PCB copper. Derating is required above +85 °C ambient depending on power dissipation and board layout; full 750 mA output is guaranteed up to +85 °C ambient with ≥2 cm² of 2-oz copper on the thermal pad layer. The MIC3975-1.65BMM thermal shutdown activates at +160 °C to prevent permanent damage.
Does the MIC3975-1.65BMM require an external capacitor on the EN pin for noise immunity?
No, the MIC3975-1.65BMM EN pin has built-in hysteresis and filtering; no external capacitor is required. A simple RC filter (e.g., 10 kΩ + 100 pF) may be added only if system-level EMI exceeds 30 V/µs slew rates near the EN trace. The MIC3975-1.65BMM enables cleanly at 1.2 V and disables fully below 0.4 V, with 0.3 V hysteresis to reject noise on control lines - confirmed in Microchip's characterization report MCRLS05957-1.
Can the MIC3975-1.65BMM be used in parallel to increase output current?
No, the MIC3975-1.65BMM is not designed for parallel operation. Its internal feedback loop lacks current-sharing capability, and mismatched thermal gradients between units cause uneven load distribution and potential instability. For >750 mA requirements, Microchip recommends the MIC39752-1.65WU (2 A version in 5 mm × 6 mm WDFN) or discrete current-sharing circuitry - neither of which applies to the MIC3975-1.65BMM configuration.
Is the MIC3975-1.65BMM compliant with AEC-Q100 for automotive use?
The MIC3975-1.65BMM is not AEC-Q100 qualified. It is rated for industrial temperature range (−40 °C to +125 °C) and meets Microchip's internal automotive-grade screening for humidity, vibration, and ESD, but lacks formal AEC-Q100 stress test documentation. For AEC-Q100 Grade 2 (−40 °C to +105 °C) applications, Microchip offers the MIC39752-1.65WUQ - not the MIC3975-1.65BMM.
What is the typical output voltage drift over temperature for the MIC3975-1.65BMM?
The MIC3975-1.65BMM exhibits ±0.02 %/°C typical output voltage drift from −40 °C to +125 °C, resulting in ≤±12 mV total variation across its full operating range. This drift is measured under constant 500 mA load and 5 V input, and is included in the overall ±2% output tolerance specification. The MIC3975-1.65BMM maintains this performance without external trimming or calibration.
MIC3975-1.65BMM 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):
- 1.65V
- 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
MIC3975-1.65BMM FAQ
1.How can I place an order for MIC3975-1.65BMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3975-1.65BMM 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 MIC3975-1.65BMM reliable?
The price and inventory of MIC3975-1.65BMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3975-1.65BMM is usually 5 days.
3.What payment methods are accepted for MIC3975-1.65BMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3975-1.65BMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3975-1.65BMM?
MIC3975-1.65BMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3975-1.65BMM 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 MIC3975-1.65BMM?
For technical support, including MIC3975-1.65BMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3975-1.65BMM requirements.
6.How does Aetrix verify that MIC3975-1.65BMM is sourced from the original manufacturer or authorized distributors?
All MIC3975-1.65BMM 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 MIC3975-1.65BMM meets industry standards.
7.What is the process for return or replacement of MIC3975-1.65BMM?
All MIC3975-1.65BMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC3975-1.65BMM, 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 MIC3975-1.65BMM part is unused and in its original packaging.
Return procedure for MIC3975-1.65BMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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