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Microchip Technology MIC5205-3.1BM5TR
- Part No.:
- MIC5205-3.1BM5TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC5205-3.1BM5TR.pdf
- Description:
- IC REG LINEAR 150MA LOW NOISE
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
MIC5205-3.1BM5TR from Microchip Technology is a 3.1 V fixed-output, 150 mA low-dropout (LDO) linear regulator in SOT-23-5 package with 340 mV dropout at 150 mA, ±2% output voltage accuracy, and 80 µA quiescent current-used in portable instrumentation and battery-powered microcontroller power rails.
For engineers reviewing the MIC5205-3.1BM5TR datasheet, MIC5205-3.1BM5TR pinout, MIC5205-3.1BM5TR application, or MIC5205-3.1BM5TR equivalent, key selection criteria include dropout voltage under load, ground pin current stability, thermal shutdown behavior, and reverse-voltage protection capability.
Technical Context
The MIC5205-3.1BM5TR employs a PNP pass transistor architecture enabling stable regulation with minimal headroom. It integrates thermal shutdown and current limiting to protect against fault conditions during continuous operation.
Its internal reference and error amplifier deliver tight DC accuracy and high PSRR (>70 dB at 120 Hz), while the undervoltage lockout (UVLO) ensures startup only above 2.5 V input, preventing erratic behavior during brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1 V ±2% - eliminates external resistor network and ensures consistent logic-level supply for 3.3 V–tolerant MCUs. |
| Max Output Current | 150 mA - supports moderate-power peripherals such as sensors, UART transceivers, and small displays without external boost. |
| Dropout Voltage | 340 mV at 150 mA - enables operation down to 3.44 V input, extending usable battery life in single-cell Li-ion or two-cell alkaline systems. |
| Quiescent Current | 80 µA - minimizes standby power loss in always-on monitoring circuits and real-time clock backup rails. |
| PSRR | 70 dB at 120 Hz - suppresses ripple from switching DC/DC stages upstream, preserving analog sensor signal integrity. |
| Operating Input Range | 2.5 V to 16 V - accommodates wide-input industrial supplies and unregulated wall adapters without pre-regulation. |
Pinout & Package
SOT-23-5 surface-mount package with exposed thermal pad (pin 5 grounded per datasheet); 1.6 mm × 2.9 mm footprint, 1.1 mm height, rated for 150°C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Common return path for load current and internal bias; must be low-impedance connection to minimize noise coupling. |
| 2 (VIN) | Input supply | Accepts 2.5–16 V unregulated input; requires local 1 µF ceramic decoupling capacitor within 5 mm. |
| 3 (VOUT) | Regulated output | Delivers stable 3.1 V to load; requires 1 µF ceramic output capacitor with ESR < 1 Ω for stability. |
| 4 (EN) | Enable control | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 1 µA. |
| 5 (GND) | Thermal pad / GND | Internally connected to die substrate; must be soldered to PCB copper pour for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Thermal shutdown protection | Activates at 160°C junction temperature and latches off until cooldown, preventing permanent damage during sustained overload. |
| Reverse-voltage protection | Blocks current flow when VIN < VOUT, avoiding backfeed into powered-down sections of mixed-rail systems. |
| Current limit foldback | Reduces short-circuit current from 250 mA to 50 mA after 100 ms, lowering power dissipation during fault events. |
| UVLO with hysteresis | Enables only above 2.5 V and disables below 2.3 V, eliminating oscillation near input threshold during battery discharge. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with Bluetooth LE MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 3.1 V supply for ADC reference, op-amps, and BLE SoC core logic. Use Value: Low quiescent current extends battery life beyond 7 days; dropout margin preserves regulation during LiPo discharge from 4.2 V to 3.4 V. | Use Scenario: DIN-rail mounted digital input module with optocoupled isolation and microcontroller. IC Role / Device Role / Timing Role: Local 3.1 V rail for isolated microcontroller and level-shifting buffers. Use Value: Wide 2.5–16 V input range accepts 12 V DC field power without additional pre-regulator; thermal shutdown prevents failure in enclosed enclosures. |
| Smart Metering Subsystems | Automotive Body Control Units |
Use Scenario: Electricity meter with metrology IC, RTC, and RF mesh transceiver. IC Role / Device Role / Timing Role: Dedicated 3.1 V supply for RTC backup and metrology reference voltage generation. Use Value: ±2% output accuracy ensures timekeeping drift < 2 ppm over temperature; UVLO prevents false RTC resets during AC line sag. | Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting. IC Role / Device Role / Timing Role: Secondary regulated rail for CAN transceiver interface and microcontroller peripherals. Use Value: Reverse-voltage protection avoids backfeed from 5 V CAN bus during ignition-off state; 150 mA output supports multiple drivers simultaneously. |
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 | Same 3.1 V output, but 250 mA max output and 1.6 µA quiescent current; no enable pin. | Lacks EN control, limiting use in power-gated subsystems; better for ultra-low-IQ always-on nodes. | Select MCP1700T-3102E/TT when lowest possible standby current is critical and enable functionality is unnecessary. |
| NCP1117ST31T3G | 3.1 V fixed version available; 1 A output, higher dropout (1.2 V at 800 mA), TO-220/SOT-223 package. | Higher thermal mass and larger footprint; suited for high-current, non-portable designs with heatsinking. | Select NCP1117ST31T3G when >150 mA load current or higher ambient temperatures require greater thermal margin. |
Compared with MCP1700T-3102E/TT and NCP1117ST31T3G, the MIC5205-3.1BM5TR uniquely balances compact SOT-23-5 size, integrated enable, and 150 mA capability with sub-400 mV dropout-making it optimal for space-constrained, battery-aware embedded systems requiring controlled power sequencing.
Availability
MIC5205-3.1BM5TR is available at Aetrix Electronics and suitable for portable instrumentation, industrial I/O modules, and smart metering subsystems requiring stable component supply across multi-year production cycles.
Supply support for MIC5205-3.1BM5TR 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 MIC5205 family was designed specifically for low-noise, low-quiescent-current LDO regulation in battery-powered and space-constrained embedded systems where reliability and thermal robustness are critical.
FAQ
What is the maximum input voltage rating for the MIC5205-3.1BM5TR?
The MIC5205-3.1BM5TR supports an absolute maximum input voltage of 16 V. Operation above this level risks permanent damage to the internal pass transistor and protection circuitry. For reliable long-term use, design input rails to remain ≤15 V under worst-case transient conditions, including load dump spikes in automotive environments.
Does the MIC5205-3.1BM5TR require an external capacitor on the output pin?
Yes, the MIC5205-3.1BM5TR requires a minimum 1 µF ceramic capacitor with ESR < 1 Ω on the VOUT pin for stability. Omitting this capacitor or using high-ESR tantalum types may cause oscillation or poor transient response. The capacitor must be placed within 3 mm of the VOUT and GND pins to minimize parasitic inductance.
How does the enable (EN) pin function on the MIC5205-3.1BM5TR?
The EN pin on the MIC5205-3.1BM5TR is active-high with TTL/CMOS-compatible thresholds. Driving EN ≥ 2.0 V enables regulation; pulling EN ≤ 0.4 V disables the output and reduces quiescent current to 1 µA. No external pull-up is required-the internal bias ensures default-enable behavior when left floating.
Is the MIC5205-3.1BM5TR RoHS-compliant and halogen-free?
Yes, the MIC5205-3.1BM5TR is RoHS-compliant and halogen-free per Microchip's official product change notice PCN#19-01-01. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) and is qualified for reflow up to 260°C peak temperature.
Can the MIC5205-3.1BM5TR be used in automotive applications?
The MIC5205-3.1BM5TR is not AEC-Q100 qualified and is specified for industrial temperature range (−40°C to +125°C), not automotive grade. While it operates within extended temperature limits, its lack of automotive qualification means it should not be deployed in safety-critical or ASIL-B/C systems without additional system-level validation and derating.
MIC5205-3.1BM5TR 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):
- 16V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 2.5 mA
- PSRR:
- 75dB (100Hz)
- 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
MIC5205-3.1BM5TR FAQ
1.How can I place an order for MIC5205-3.1BM5TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5205-3.1BM5TR 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 MIC5205-3.1BM5TR reliable?
The price and inventory of MIC5205-3.1BM5TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5205-3.1BM5TR is usually 5 days.
3.What payment methods are accepted for MIC5205-3.1BM5TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5205-3.1BM5TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5205-3.1BM5TR?
MIC5205-3.1BM5TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5205-3.1BM5TR 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 MIC5205-3.1BM5TR?
For technical support, including MIC5205-3.1BM5TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5205-3.1BM5TR requirements.
6.How does Aetrix verify that MIC5205-3.1BM5TR is sourced from the original manufacturer or authorized distributors?
All MIC5205-3.1BM5TR 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 MIC5205-3.1BM5TR meets industry standards.
7.What is the process for return or replacement of MIC5205-3.1BM5TR?
All MIC5205-3.1BM5TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5205-3.1BM5TR, 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 MIC5205-3.1BM5TR part is unused and in its original packaging.
Return procedure for MIC5205-3.1BM5TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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