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Microchip Technology MIC5209-2.5BS
- Part No.:
- MIC5209-2.5BS
- Manufacturer:
- Microchip Technology
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
MIC5209-2.5BS.pdf
- Description:
- IC REG LIN 2.5V 500MA SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,180
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Product details
Overview
MIC5209-2.5BS from Microchip Technology is a fixed-output 2.5 V low-dropout (LDO) linear voltage regulator with 150 mA output current capability, 350 mV dropout voltage at full load, and ±2% output voltage accuracy over temperature and line/load conditions; it is used in portable instrumentation and battery-powered microcontroller subsystems requiring stable low-noise supply.
For engineers reviewing the MIC5209-2.5BS datasheet, MIC5209-2.5BS pinout, MIC5209-2.5BS application, or MIC5209-2.5BS equivalent, key selection criteria include dropout voltage at 150 mA, thermal shutdown behavior, reverse-current protection, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MIC5209-2.5BS employs a PNP pass transistor architecture enabling low dropout operation without external compensation. It integrates thermal shutdown, current limiting, and reverse-battery protection to ensure safe operation under fault conditions.
Designed for use with ceramic output capacitors ≥1.0 µF, the regulator maintains stability across input voltages from 2.5 V to 16 V and operates over –40°C to +125°C junction temperature range without derating up to 85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% (guaranteed over line, load, and temperature) |
| Max Output Current | 150 mA (supports logic-level MCU cores and analog sensors) |
| Dropout Voltage | 350 mV at 150 mA (enables regulation down to 2.85 V input) |
| Input Voltage Range | 2.5 V to 16 V (compatible with single Li-ion, multi-cell alkaline, or 12 V rail) |
| Ground Pin Current | 1.2 mA typical at full load (low quiescent power loss) |
| PSRR | 70 dB at 120 Hz (effective noise rejection for ADC reference supplies) |
Pinout & Package
Package: SOT-23-5 - surface-mount, 5-terminal plastic package with exposed thermal pad (pin-compatible with industry-standard footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Common return path for load and internal bias circuits |
| 2 (OUT) | Regulated output | Delivers stable 2.5 V to load; requires ≥1.0 µF ceramic capacitor |
| 3 (IN) | Unregulated input | Accepts 2.5–16 V; must be decoupled with ≥1.0 µF ceramic capacitor |
| 4 (EN) | Enable control | Active-high logic input; pulls output to high-impedance when low |
| 5 (ADJ/SS) | Adjust / Soft-start | Not connected for fixed version; internally tied to bandgap reference |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Prevents damage and reverse current flow when input polarity is inverted |
| Thermal shutdown with hysteresis | Disables output above 160°C junction temp; resumes after ~15°C cooldown |
| Current limit foldback | Reduces short-circuit current to ~50 mA to limit power dissipation |
| Low-noise output | 30 µVRMS output noise (10 Hz–100 kHz) enables clean analog/RF supply rails |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Powering low-power analog front-ends in handheld ECG or pulse oximetry units. IC Role / Device Role / Timing Role: Provides ultra-low-noise 2.5 V reference supply for 12-bit SAR ADCs and op-amp signal conditioning. Use Value: 30 µVRMS noise and ±2% accuracy preserve measurement integrity without post-calibration. | Use Scenario: Supplying isolated sensor interface circuitry in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Regulates 2.5 V for precision current-loop transmitters (4–20 mA) and HART modems. Use Value: Reverse-battery protection prevents field wiring errors from damaging downstream analog ICs. |
| Wireless Sensor Nodes | Automotive Body Control Modules |
Use Scenario: Biasing RF transceivers and microcontrollers in Zigbee/Z-Wave edge nodes. IC Role / Device Role / Timing Role: Delivers stable 2.5 V from coin-cell or energy-harvesting sources with minimal quiescent current. Use Value: 1.2 mA ground current and 350 mV dropout extend battery life while supporting cold-cranking input dips. | Use Scenario: Powering LIN bus transceivers and EEPROMs in door module ECUs. IC Role / Device Role / Timing Role: Supplies regulated 2.5 V for LIN physical layer ICs and non-volatile memory interfaces. Use Value: Thermal shutdown and current foldback protect against sustained overloads during actuator stall events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2502E/TO | 300 mA rated, 170 mV dropout at 250 mA, TO-92 package | Larger footprint, no enable pin, higher max current | Preferred where higher output current and through-hole assembly are acceptable |
| TCS2102-2.5 | 150 mA rated, 220 mV dropout at 150 mA, SOT-23-5, no reverse-battery protection | Lower dropout but lacks reverse-polarity safety for automotive harness environments | Selected when minimal dropout is critical and input polarity is guaranteed |
Compared with MCP1700-2502E/TO and TCS2102-2.5, the MIC5209-2.5BS uniquely combines reverse-battery protection, enable functionality, and 350 mV dropout in an SOT-23-5 package-making it optimal for battery-powered systems with variable input polarity and space constraints.
Availability
MIC5209-2.5BS is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor interfaces, and wireless edge nodes requiring stable component supply with consistent parametric performance and long-term manufacturability.
Supply support for MIC5209-2.5BS 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 MIC5209 series is part of Microchip's precision LDO portfolio designed specifically for noise-sensitive, battery-operated systems requiring robust fault protection and tight DC accuracy.
FAQ
What is the minimum input voltage required for MIC5209-2.5BS to maintain regulation?
The MIC5209-2.5BS requires a minimum input voltage of 2.85 V to sustain 2.5 V output at full 150 mA load, based on its 350 mV dropout specification. At lighter loads, regulation is maintained down to 2.5 V input. Input below 2.5 V disables regulation entirely, and the device enters undervoltage lockout.
Does MIC5209-2.5BS require an external capacitor on the ADJ/SS pin?
No. The MIC5209-2.5BS is a fixed-output variant; the ADJ/SS pin is internally connected to the bandgap reference and must remain unconnected. External components on this pin are unnecessary and may impair regulation stability or cause startup issues.
Can MIC5209-2.5BS be used with ceramic output capacitors smaller than 1.0 µF?
No. The MIC5209-2.5BS requires a minimum 1.0 µF ceramic output capacitor for stability across all operating conditions. Using smaller values risks oscillation or poor transient response, especially under step-load changes. X7R or X5R dielectrics are recommended.
What happens to the output of MIC5209-2.5BS when the EN pin is pulled low?
When the EN pin is driven low (<0.4 V), the MIC5209-2.5BS disables its pass element and places the OUT pin in high-impedance state. Output voltage collapses, and ground current drops to ≤1 µA. This enables true zero-power standby mode in battery-critical applications.
Is MIC5209-2.5BS qualified for automotive temperature grade?
No. The MIC5209-2.5BS is specified for –40°C to +125°C junction temperature but is not AEC-Q200 qualified. It is intended for industrial and commercial applications. For automotive-grade equivalents, consider Microchip's MIC5320 or MIC5365 families with formal AEC-Q200 certification.
MIC5209-2.5BS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 170 µA
- Current - Supply (Max):
- 25 mA
- PSRR:
- 75dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
MIC5209-2.5BS FAQ
1.How can I place an order for MIC5209-2.5BS through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5209-2.5BS 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 MIC5209-2.5BS reliable?
The price and inventory of MIC5209-2.5BS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5209-2.5BS is usually 5 days.
3.What payment methods are accepted for MIC5209-2.5BS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5209-2.5BS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5209-2.5BS?
MIC5209-2.5BS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5209-2.5BS 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 MIC5209-2.5BS?
For technical support, including MIC5209-2.5BS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5209-2.5BS requirements.
6.How does Aetrix verify that MIC5209-2.5BS is sourced from the original manufacturer or authorized distributors?
All MIC5209-2.5BS 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 MIC5209-2.5BS meets industry standards.
7.What is the process for return or replacement of MIC5209-2.5BS?
All MIC5209-2.5BS units undergo pre-shipment inspection (PSI). If there is an issue with MIC5209-2.5BS, 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 MIC5209-2.5BS part is unused and in its original packaging.
Return procedure for MIC5209-2.5BS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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