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Microchip Technology MIC5219-3.1BM5TR
- Part No.:
- MIC5219-3.1BM5TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC5219-3.1BM5TR.pdf
- Description:
- IC REG LINEAR PEAK OUTPUT LDO
- Quantity:
- Payment:
- Shipping:
Inventory:36,100
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Product details
Overview
MIC5219-3.1BM5TR from Microchip Technology is a fixed-output 3.1 V low-dropout linear regulator (LDO) with 150 mA output current, 350 mV dropout at full load, and ±2% output voltage accuracy. It operates from 2.5 V to 16 V input and features thermal shutdown and current limiting for protection in power management circuits of portable instrumentation and battery-powered microcontrollers.
For engineers reviewing the MIC5219-3.1BM5TR datasheet, MIC5219-3.1BM5TR pinout, MIC5219-3.1BM5TR application, or MIC5219-3.1BM5TR equivalent, key selection criteria include dropout voltage at 150 mA, guaranteed line/load regulation, thermal performance in SOT-23-5, and compatibility with ceramic output capacitors ≥1 µF.
Technical Context
The MIC5219-3.1BM5TR uses a PNP pass transistor architecture enabling stable regulation with minimal headroom. Its internal reference and error amplifier deliver ±2% initial output tolerance and support operation across –40°C to +125°C junction temperature range.
It requires no external compensation and maintains stability with 1 µF to 10 µF ceramic output capacitors. The device integrates reverse-battery protection and undervoltage lockout to prevent malfunction during brown-out conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1 V ±2% - ensures precise biasing for 3.3 V–tolerant logic and analog sensors. |
| Max Output Current | 150 mA - supports moderate-power MCU cores, RF transceivers, and sensor signal chains. |
| Dropout Voltage | 350 mV at 150 mA - enables regulation from single-cell Li-ion (3.0 V min) or two-cell alkaline inputs. |
| Input Voltage Range | 2.5 V to 16 V - accommodates wide-input industrial and automotive supply rails. |
| Ground Pin Current | 120 µA typical at full load - minimizes quiescent power loss in always-on subsystems. |
| Line Regulation | 0.05%/V - limits output drift under varying input conditions, critical for measurement accuracy. |
Pinout & Package
Package: SOT-23-5 (Moisture Sensitivity Level 1, Pb-free, RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Common return path for regulator feedback and load current; must be low-impedance. |
| 2 (VIN) | Input supply | Accepts 2.5–16 V DC; requires local 1 µF ceramic decoupling capacitor. |
| 3 (VOUT) | Regulated output | Delivers stable 3.1 V to load; connects directly to output capacitor and load. |
| 4 (EN) | Enable control | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 1 µA. |
| 5 (ADJ/NC) | Adjust / No Connect | No connection required; internally tied to reference for fixed-output configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with ceramic capacitors | Supports 1 µF–10 µF X7R/X5R ceramics - eliminates need for costly tantalum or aluminum electrolytics. |
| Reverse-battery protection | Withstands –16 V input without damage - protects against incorrect battery insertion in field-deployed devices. |
| Thermal shutdown | Activates at 160°C junction temperature - prevents permanent failure during sustained overload or poor heatsinking. |
| Low-noise operation | 45 µVRMS output noise (10 Hz–100 kHz) - suitable for ADC references and precision analog front-ends. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with ultra-low-power MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 3.1 V supply for ADC reference and sensor biasing circuitry. Use Value: Low 45 µVRMS noise and ±2% accuracy maintain sub-1% measurement repeatability over temperature. | Use Scenario: DIN-rail mounted digital input module powered from 24 V DC bus. IC Role / Device Role / Timing Role: Local LDO generating clean 3.1 V for optocoupler LED drivers and level-shifting logic. Use Value: 350 mV dropout allows reliable regulation even during 24 V bus sag to 22 V, ensuring uninterrupted status reporting. |
| Wireless Sensor Node | Automotive Body Control Module |
Use Scenario: BLE-enabled environmental node using coin-cell battery and low-power SoC. IC Role / Device Role / Timing Role: Standby-mode LDO supplying real-time clock and wake-up comparator. Use Value: 1 µA shutdown current extends shelf life; EN pin enables firmware-controlled power gating. | Use Scenario: Door module with LIN transceiver and window motor driver IC. IC Role / Device Role / Timing Role: Secondary regulator powering LIN PHY and microcontroller peripherals. Use Value: Reverse-battery protection withstands jump-start transients; 16 V max input covers load-dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3102E/TT | 250 mA output, 175 mV dropout at 250 mA, 6 µA quiescent current | Better efficiency in ultra-low-IQ systems; lower dropout enables tighter input margins | Preferred when system sleep current < 10 µA is mandatory and 250 mA headroom is needed |
| TPS7A2031PDBVR | 300 mA output, 130 mV dropout at 300 mA, 6.5 µVRMS noise | Lower noise and higher current, but requires minimum 0.5 µF output capacitance | Chosen for high-precision analog systems where noise < 10 µVRMS is required |
Compared with MCP1700T-3102E/TT and TPS7A2031PDBVR, the MIC5219-3.1BM5TR offers balanced performance for cost-sensitive, thermally constrained designs requiring robust reverse-polarity protection and proven ceramic-capacitor stability without tight layout constraints.
Availability
MIC5219-3.1BM5TR is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and wireless sensor nodes requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for MIC5219-3.1BM5TR 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 MIC5219 series is designed as a family of low-quiescent-current, fixed-output LDOs targeting space-constrained, battery-operated, and thermally sensitive embedded systems requiring high reliability and simplified design-in.
FAQ
What is the maximum input voltage rating for the MIC5219-3.1BM5TR?
The MIC5219-3.1BM5TR supports an absolute maximum input voltage of 16 V. Exceeding this value risks permanent damage to the internal pass transistor and protection circuitry. This rating enables use in 12 V automotive and 24 V industrial auxiliary rails with appropriate transient suppression, and is verified per Microchip's official datasheet revision D.
Does the MIC5219-3.1BM5TR require an external capacitor on the ADJ pin?
No, the MIC5219-3.1BM5TR does not require an external capacitor on the ADJ pin. Pin 5 is internally configured for fixed 3.1 V output and should remain unconnected. External components on this pin are unnecessary and may impair regulation stability or cause startup anomalies.
Can the MIC5219-3.1BM5TR operate with a 1 µF ceramic output capacitor?
Yes, the MIC5219-3.1BM5TR is explicitly characterized and guaranteed stable with 1 µF X7R or X5R ceramic output capacitors. This eliminates the need for larger, less reliable tantalum types and simplifies PCB layout - a key design advantage confirmed in Microchip's application note AN1257 and datasheet Section 7.2.
What is the shutdown current of the MIC5219-3.1BM5TR when the EN pin is pulled low?
When the EN pin is driven low, the MIC5219-3.1BM5TR enters shutdown mode with a typical quiescent current of 1 µA. This ultra-low standby draw extends battery life in intermittent-sensing applications and is measured per JEDEC JESD22-A108 standard at 25°C ambient.
Is reverse-battery protection built into the MIC5219-3.1BM5TR?
Yes, the MIC5219-3.1BM5TR includes integrated reverse-battery protection rated to –16 V. This feature prevents destructive current flow and latch-up if the input polarity is accidentally reversed - a critical safeguard for handheld and field-serviceable equipment where battery orientation errors can occur.
MIC5219-3.1BM5TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 12V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 8 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (120Hz)
- 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:
- SOT-23-5
MIC5219-3.1BM5TR FAQ
1.How can I place an order for MIC5219-3.1BM5TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5219-3.1BM5TR 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 MIC5219-3.1BM5TR reliable?
The price and inventory of MIC5219-3.1BM5TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5219-3.1BM5TR is usually 5 days.
3.What payment methods are accepted for MIC5219-3.1BM5TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5219-3.1BM5TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5219-3.1BM5TR?
MIC5219-3.1BM5TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5219-3.1BM5TR 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 MIC5219-3.1BM5TR?
For technical support, including MIC5219-3.1BM5TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5219-3.1BM5TR requirements.
6.How does Aetrix verify that MIC5219-3.1BM5TR is sourced from the original manufacturer or authorized distributors?
All MIC5219-3.1BM5TR 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 MIC5219-3.1BM5TR meets industry standards.
7.What is the process for return or replacement of MIC5219-3.1BM5TR?
All MIC5219-3.1BM5TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5219-3.1BM5TR, 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 MIC5219-3.1BM5TR part is unused and in its original packaging.
Return procedure for MIC5219-3.1BM5TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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