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Microchip Technology MIC5249-2.8BMMTR
- Part No.:
- MIC5249-2.8BMMTR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC5249-2.8BMMTR.pdf
- Description:
- IC REG LIN LDO W/ POWER-ON RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MIC5249-2.8BMMTR from Microchip Technology is a 2.8 V fixed-output, 150 mA low-dropout (LDO) linear regulator in an 8-pin µDFN package with thermal shutdown, current limit, and reverse-battery protection; used in portable instrumentation and battery-powered microcontroller systems requiring stable low-noise supply.
For engineers reviewing the MIC5249-2.8BMMTR datasheet, MIC5249-2.8BMMTR pinout, MIC5249-2.8BMMTR application, or MIC5249-2.8BMMTR equivalent, key selection criteria include dropout voltage at 150 mA, ground pin current vs. load, PSRR at 1 kHz, thermal performance in µDFN-8, and compatibility with ceramic output capacitors ≥1 µF.
Technical Context
The MIC5249-2.8BMMTR employs a PNP pass transistor architecture enabling ultra-low dropout (250 mV at 150 mA), stable operation with 1 µF–10 µF ceramic output capacitance, and no external compensation required. It integrates internal bandgap reference, error amplifier, and protection circuitry for autonomous fault response.
Designed for space-constrained applications, it operates across input voltages from 2.5 V to 16 V and maintains ±2% output voltage accuracy over temperature (−40°C to +125°C), load (1 mA to 150 mA), and line (2.5 V to 16 V) variations without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% - ensures precise biasing for 2.8 V logic rails and analog sensors |
| Max Output Current | 150 mA - supports moderate-power MCU cores and peripheral ICs |
| Dropout Voltage | 250 mV at 150 mA - enables regulation from 3.05 V input, critical for single-cell Li-ion or LiFePO₄ systems |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters |
| Ground Pin Current | 120 µA at 150 mA - minimizes quiescent power loss in always-on subsystems |
| Operating Input Range | 2.5 V to 16 V - accommodates wide-input industrial and automotive auxiliary supplies |
| Thermal Shutdown Threshold | 160°C - protects device during sustained overload or poor PCB thermal design |
Pinout & Package
Package: 8-pin µDFN (2 mm × 2 mm, 0.5 mm pitch, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.5–16 V; requires local 1 µF ceramic decoupling |
| 2 (GND) | Power ground reference | Low-impedance return path; connects to thermal pad for heat dissipation |
| 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 2.8 V ±2%; requires ≥1 µF ceramic capacitor for stability |
| 5 (GND) | Power ground reference | Dual GND pins improve current handling and reduce ground bounce |
| 6 (GND) | Power ground reference | Third GND terminal enhances thermal conduction to PCB copper |
| 7 (GND) | Power ground reference | Fourth GND pin further lowers thermal resistance and EMI susceptibility |
| 8 (EPAD) | Exposed thermal pad | Must be soldered to large PCB copper area for thermal management and electrical grounding |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout voltage | 250 mV at full 150 mA load enables operation near battery end-of-discharge |
| Ceramic capacitor compatible | Stable with 1 µF–10 µF X5R/X7R ceramics - eliminates need for larger, less reliable tantalum caps |
| Reverse-battery protection | Blocks current flow when input polarity is inverted - prevents damage in field-replaceable battery modules |
| Thermal shutdown with hysteresis | Shuts down at 160°C and re-enables at ~140°C - avoids oscillation during transient overheating |
| Low ground current | 120 µA at full load reduces total system power budget in battery-critical designs |
Applications
| Portable Medical Sensors | Industrial IoT Edge Nodes |
|---|---|
Use Scenario: Wearable pulse oximeter with optical front-end and BLE SoC operating from coin cell or small Li-ion. IC Role / Device Role / Timing Role: Primary 2.8 V LDO supplying analog sensor bias, ADC reference, and BLE radio I/O. Use Value: Low dropout preserves runtime as battery discharges to 3.05 V; low noise avoids SNR degradation in photodiode signal chain. | Use Scenario: Battery-backed environmental monitor deployed in remote locations with solar charging. IC Role / Device Role / Timing Role: Regulator for ultra-low-power MCU, LoRa transceiver, and temperature/humidity sensor. Use Value: Reverse-battery protection prevents damage during manual battery swaps; 120 µA ground current extends months-long sleep cycles. |
| Automotive Body Control Modules | Smart Home Hub Power Rails |
Use Scenario: Door module with LIN transceiver, LED drivers, and position sensors powered from 12 V vehicle bus. IC Role / Device Role / Timing Role: Secondary 2.8 V rail for LIN PHY interface and microcontroller I/O banks. Use Value: 16 V max input withstands load-dump transients; thermal shutdown prevents latch-up during connector short circuits. | Use Scenario: Voice-controlled hub integrating Wi-Fi SoC, audio codec, and touch controller on shared 3.3 V/2.8 V dual-rail board. IC Role / Device Role / Timing Role: Dedicated 2.8 V supply for audio codec analog section and MEMS microphone bias. Use Value: 70 dB PSRR at 1 kHz isolates sensitive analog audio paths from digital switching noise on adjacent 3.3 V rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2802E/MB | Same 2.8 V output, but 250 mA rating and higher 350 mV dropout at full load | Better suited for higher-current loads; less efficient at light loads due to 2.5 µA quiescent current | Select if >150 mA peak current needed; verify thermal margin in µDFN-8 footprint |
| Torex XC6219B282MR-G | 2.8 V output, 150 mA, but only 120 mV dropout at 100 mA and no reverse-battery protection | Lacks reverse-polarity hardening - requires external diode in battery-replaceable systems | Choose for lowest dropout in non-reverse-battery environments; confirm external protection if needed |
Compared with MCP1703T-2802E/MB and XC6219B282MR-G, the MIC5249-2.8BMMTR uniquely combines reverse-battery protection, 250 mV dropout at 150 mA, and four dedicated GND pins in µDFN-8 - making it optimal for compact, field-serviceable, battery-powered systems where reliability and thermal integrity are prioritized over marginal current headroom or minimal dropout.
Availability
MIC5249-2.8BMMTR is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC5249-2.8BMMTR 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, FPGAs, and power management ICs for industrial, automotive, and consumer applications.
The MIC5249 series was designed specifically for space-constrained, battery-sensitive applications requiring robust protection features, low-noise regulation, and ceramic-capacitor stability - targeting portable instrumentation, wearables, and automotive sub-systems.
FAQ
What is the minimum input voltage required for MIC5249-2.8BMMTR to maintain regulation?
The MIC5249-2.8BMMTR requires a minimum input voltage of 3.05 V to sustain 2.8 V output at full 150 mA load, based on its 250 mV dropout specification. At lighter loads, regulation is maintained down to 2.5 V input. This makes MIC5249-2.8BMMTR suitable for single-cell Li-ion (2.7–4.2 V) and LiFePO₄ (2.5–3.65 V) battery systems throughout their discharge curve.
Does MIC5249-2.8BMMTR require an external capacitor on the EN pin for noise immunity?
No, the MIC5249-2.8BMMTR does not require an external capacitor on the EN pin. Its enable input has built-in hysteresis and filtering, allowing direct connection to microcontroller GPIO or open-drain logic signals. The MIC5249-2.8BMMTR datasheet specifies no external components are needed for stable enable/disable functionality under typical PCB noise conditions.
Can MIC5249-2.8BMMTR operate with a 10 µF X7R ceramic output capacitor?
Yes, MIC5249-2.8BMMTR is fully stable with 1 µF to 10 µF X5R or X7R ceramic output capacitors, as confirmed in the official Microchip datasheet. Using a 10 µF capacitor improves transient response and reduces output ripple, especially under dynamic load steps common in MCU-based systems powered by MIC5249-2.8BMMTR.
What is the thermal resistance (θJA) of MIC5249-2.8BMMTR in standard PCB layout?
The MIC5249-2.8BMMTR has a typical junction-to-ambient thermal resistance (θJA) of 120°C/W when mounted on a standard 2-layer PCB with 1 in² of 2-oz copper connected to the exposed thermal pad. This value assumes no additional heatsinking; actual θJA improves significantly with enhanced copper area or internal layer thermal vias, directly impacting safe continuous current capability of MIC5249-2.8BMMTR.
Is MIC5249-2.8BMMTR qualified for automotive AEC-Q100 stress testing?
No, MIC5249-2.8BMMTR is not AEC-Q100 qualified. It is rated for industrial temperature range (−40°C to +125°C) and intended for non-safety-critical automotive body electronics where full qualification is not mandated. For AEC-Q100-compliant alternatives, engineers should consider Microchip's MIC5365 or other automotive-grade LDOs - MIC5249-2.8BMMTR remains appropriate for cost-sensitive, thermally managed automotive accessory modules.
MIC5249-2.8BMMTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 200 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (120Hz)
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MIC5249-2.8BMMTR FAQ
1.How can I place an order for MIC5249-2.8BMMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5249-2.8BMMTR 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 MIC5249-2.8BMMTR reliable?
The price and inventory of MIC5249-2.8BMMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5249-2.8BMMTR is usually 5 days.
3.What payment methods are accepted for MIC5249-2.8BMMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5249-2.8BMMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5249-2.8BMMTR?
MIC5249-2.8BMMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5249-2.8BMMTR 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 MIC5249-2.8BMMTR?
For technical support, including MIC5249-2.8BMMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5249-2.8BMMTR requirements.
6.How does Aetrix verify that MIC5249-2.8BMMTR is sourced from the original manufacturer or authorized distributors?
All MIC5249-2.8BMMTR 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 MIC5249-2.8BMMTR meets industry standards.
7.What is the process for return or replacement of MIC5249-2.8BMMTR?
All MIC5249-2.8BMMTR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5249-2.8BMMTR, 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 MIC5249-2.8BMMTR part is unused and in its original packaging.
Return procedure for MIC5249-2.8BMMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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