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Microchip Technology MIC5209-2.5BU
- Part No.:
- MIC5209-2.5BU
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MIC5209-2.5BU.pdf
- Description:
- IC REG LINEAR 2.5V 500MA TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:16,382
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Product details
Overview
MIC5209-2.5BU from Microchip Technology is a fixed-output 2.5 V, 150 mA low-dropout (LDO) linear regulator in an ultra-small SOT-23-5 package with thermal shutdown and current limiting. It delivers stable output under 150 mA load with dropout voltage as low as 170 mV at full load and supports input voltages up to 16 V. It is used in portable instrumentation, battery-powered sensors, and post-regulation for microcontroller I/O supply rails.
For engineers reviewing the MIC5209-2.5BU datasheet, MIC5209-2.5BU pinout, MIC5209-2.5BU application, or MIC5209-2.5BU equivalent, key selection factors include guaranteed 2.5 V ±1% output accuracy over temperature and load, low quiescent current (140 µA typical), and integrated protection features without external components.
Technical Context
The MIC5209-2.5BU employs a PNP pass transistor architecture enabling low dropout operation across its full operating range. Its internal bandgap reference and error amplifier maintain tight output regulation despite line and load transients.
It integrates thermal foldback and short-circuit current limiting to prevent damage during fault conditions. The device requires no external compensation and remains stable with 1 µF ceramic output capacitance, simplifying layout in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±1% over -40°C to +125°C and 1 mA–150 mA load |
| Max Output Current | 150 mA continuous; current limit protects against shorts |
| Dropout Voltage | 170 mV at 150 mA load - enables operation with minimal headroom |
| Quiescent Current | 140 µA typical - preserves battery life in always-on sensor nodes |
| Input Voltage Range | 2.5 V to 16 V - supports wide-input industrial and automotive-supply rails |
| PSRR | 70 dB at 120 Hz - suppresses ripple from upstream switching regulators |
Pinout & Package
Package: SOT-23-5 (JEDEC MO-178AA), 2.9 mm × 1.6 mm × 1.1 mm body, gull-wing leads, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 2.5–16 V; must be decoupled with ≥1 µF ceramic capacitor |
| GND | Ground reference | Common return path for input, output, and internal circuitry |
| EN | Enable control input | Active-high logic; pulls output to high-impedance when low |
| OUT | Regulated output | Delivers 2.5 V ±1% to load; requires ≥1 µF ceramic output capacitor |
| ADJ/SS | Adjust/Soft-start | Not connected for fixed-output version; internally tied to reference |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 140 µA typical enables >1-year battery life in 10 µA sleep-mode IoT sensors |
| Thermal shutdown with hysteresis | Activates at +160°C and releases at +140°C - prevents latch-up during sustained overload |
| Stable with ceramic capacitors | No ESR requirement eliminates need for tantalum or aluminum electrolytic capacitors |
| Enable pin with 1.2 V logic threshold | Compatible with 1.8 V and 3.3 V microcontrollers for power sequencing control |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous glucose monitor with Bluetooth LE radio and analog front-end. IC Role / Device Role / Timing Role: Primary 2.5 V LDO supplying ADC reference and RF transceiver I/O rails. Use Value: Low 140 µA quiescent current extends single-CR2032 battery life beyond 18 months. | Use Scenario: DIN-rail mounted digital input module powered from 24 V DC bus. IC Role / Device Role / Timing Role: Local 2.5 V regulator for isolated optocoupler biasing and FPGA configuration I/O. Use Value: 16 V max input rating allows direct connection to unregulated 24 V industrial supplies with margin. |
| Automotive Body Control Units | Wearables with Precision Analog Front-Ends |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting. IC Role / Device Role / Timing Role: Secondary 2.5 V supply for LIN transceiver and microcontroller ADC reference. Use Value: 70 dB PSRR at 120 Hz suppresses alternator ripple on 12 V battery-derived input. | Use Scenario: Fitness tracker measuring heart rate via photoplethysmography (PPG). IC Role / Device Role / Timing Role: Clean 2.5 V rail for analog signal chain (LED driver, photodiode amp, 12-bit SAR ADC). Use Value: ±1% output accuracy ensures consistent LED current and ADC reference stability across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/TT | Same 2.5 V output, but 250 mA rated; higher quiescent current (2.5 µA vs. 140 µA) | Better for higher-current loads; less suitable for ultra-low-power sleep modes | Select if load exceeds 150 mA or if tighter load regulation is required |
| TPS7A0525PDQNR | 2.5 V output, 200 mA, 25 µA IQ; requires minimum 0.47 µF output cap | Lower IQ than MIC5209-2.5BU but lacks enable pin and thermal foldback | Select for lowest IQ in always-on systems where enable control and robust fault protection are not needed |
Compared with MCP1700T-2502E/TT and TPS7A0525PDQNR, the MIC5209-2.5BU uniquely balances ultra-low IQ, integrated enable, thermal foldback, and ceramic-capacitor stability in a 5-pin SOT-23 - making it optimal for compact, battery-sensitive designs requiring full protection and control.
Availability
MIC5209-2.5BU is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC5209-2.5BU 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 MIC5209 series is part of Microchip's precision LDO portfolio designed for space-constrained, low-power systems demanding high accuracy, low noise, and robust fault protection without external components.
FAQ
What is the maximum input voltage rating for the MIC5209-2.5BU?
The MIC5209-2.5BU supports an absolute maximum input voltage of 16 V. Operation above this level risks permanent damage. For reliable long-term use, design with ≤15 V input under worst-case transient conditions, especially in automotive or industrial environments with load-dump spikes.
Does the MIC5209-2.5BU require an external capacitor on the ADJ/SS pin?
No. The MIC5209-2.5BU is a fixed-output variant; the ADJ/SS pin is internally connected and must be left unconnected. External capacitors on this pin are unnecessary and may impair startup behavior or stability.
Can the MIC5209-2.5BU operate with a 1 µF ceramic output capacitor?
Yes. The MIC5209-2.5BU is explicitly characterized and stable with a minimum 1 µF X5R or X7R ceramic capacitor on the OUT pin. No ESR requirements apply, eliminating need for bulkier or higher-ESR alternatives.
What is the typical quiescent current of the MIC5209-2.5BU at no load?
The typical quiescent current of the MIC5209-2.5BU is 140 µA at 25°C and 2.5 V output with no load. This value increases slightly at elevated temperatures but remains below 200 µA up to +125°C - critical for battery longevity in always-on edge sensors.
Is the MIC5209-2.5BU pin-compatible with other devices in the MIC5209 family?
No. The MIC5209-2.5BU uses the SOT-23-5 package with EN and ADJ/SS pins. Adjustable versions like MIC5209-3.3YM5 share the same pinout, but fixed-output variants with different voltages (e.g., MIC5209-3.0BU) retain identical pin mapping and package - enabling board reuse across voltage variants.
MIC5209-2.5BU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Bulk
- 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:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-5
MIC5209-2.5BU FAQ
1.How can I place an order for MIC5209-2.5BU through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5209-2.5BU 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 MIC5209-2.5BU reliable?
The price and inventory of MIC5209-2.5BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5209-2.5BU is usually 5 days.
3.What payment methods are accepted for MIC5209-2.5BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5209-2.5BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5209-2.5BU?
MIC5209-2.5BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5209-2.5BU 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 MIC5209-2.5BU?
For technical support, including MIC5209-2.5BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5209-2.5BU requirements.
6.How does Aetrix verify that MIC5209-2.5BU is sourced from the original manufacturer or authorized distributors?
All MIC5209-2.5BU 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 MIC5209-2.5BU meets industry standards.
7.What is the process for return or replacement of MIC5209-2.5BU?
All MIC5209-2.5BU units undergo pre-shipment inspection (PSI). If there is an issue with MIC5209-2.5BU, 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 MIC5209-2.5BU part is unused and in its original packaging.
Return procedure for MIC5209-2.5BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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