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Microchip Technology MIC5209-3.6BS
- Part No.:
- MIC5209-3.6BS
- Manufacturer:
- Microchip Technology
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
MIC5209-3.6BS.pdf
- Description:
- IC REG LIN 3.6V 500MA SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:38,797
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Product details
Overview
MIC5209-3.6BS from Microchip Technology is a 3.6 V fixed-output, low-dropout linear regulator (LDO) with 150 mA output current, 350 mV dropout at full load, and ±2% output voltage accuracy. It operates from 4.5 V to 16 V input and features thermal shutdown and current limiting for protection in power management circuits for microcontroller-based sensors.
For engineers reviewing the MIC5209-3.6BS datasheet, MIC5209-3.6BS pinout, MIC5209-3.6BS application, or MIC5209-3.6BS equivalent, key selection criteria include dropout voltage under load, quiescent current in active mode, thermal performance in SOT-23-5, and compatibility with battery-powered industrial monitoring systems requiring stable 3.6 V rail.
Technical Context
The MIC5209-3.6BS uses a PNP pass transistor architecture enabling low dropout operation without external compensation. Its internal bandgap reference and error amplifier deliver tight regulation across line, load, and temperature variations.
It integrates foldback current limiting and thermal shutdown with automatic recovery, supporting robust operation in unregulated DC input environments such as 9 V battery or 12 V wall adapter supplies feeding embedded peripherals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.6 V ±2% - ensures stable supply for 3.3 V–3.6 V logic interfaces and analog front-ends. |
| Max Output Current | 150 mA - sufficient to power MCU cores, RF transceivers, or small sensor arrays without external boost. |
| Dropout Voltage | 350 mV at 150 mA - enables operation down to 3.95 V input while maintaining regulation. |
| Quiescent Current | 120 µA typical - minimizes standby power loss in always-on sensor nodes. |
| Input Voltage Range | 4.5 V to 16 V - supports common industrial DC rails and battery-derived supplies. |
| PSRR | 70 dB at 120 Hz - suppresses ripple from switching pre-regulators or noisy adapters. |
Pinout & Package
Package: SOT-23-5 - surface-mount, thermally enhanced 5-pin plastic package with exposed pad for improved heat dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input voltage supply | Accepts 4.5–16 V unregulated DC; requires local 1 µF ceramic decoupling. |
| GND | Ground reference | Common return path for input, output, and internal circuitry; connects to thermal pad. |
| OUT | Regulated output | Delivers 3.6 V ±2% to load; requires 1 µF ceramic output capacitor for stability. |
| EN | Enable control | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 1 µA. |
| ADJ/SEL | Adjust/Select terminal | Not used in fixed-output MIC5209-3.6BS; internally connected to set 3.6 V output. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 350 mV at 150 mA enables use with marginal input headroom in battery-depleted conditions. |
| Enable functionality | Active-high EN pin allows precise system-level power sequencing and sleep-mode control. |
| Thermal shutdown | Automatic cutoff above +160°C junction temperature prevents damage during sustained overload. |
| Current limiting | Foldback-type protection reduces output current near short-circuit to limit power dissipation. |
Applications
| Industrial Sensor Node | Portable Data Logger |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor node operating continuously for 6+ months on two AA cells. IC Role / Device Role / Timing Role: Primary 3.6 V LDO supplying MCU, ADC, and wireless transceiver. Use Value: Low 120 µA quiescent current extends battery life; 350 mV dropout maintains regulation until battery drops to ~3.95 V. | Use Scenario: Handheld environmental logger with LCD display and SD card interface. IC Role / Device Role / Timing Role: Fixed 3.6 V regulator for microcontroller and peripheral I/O rails. Use Value: ±2% output accuracy ensures reliable ADC reference and consistent display contrast across temperature. |
| Smart Meter Interface Module | IoT Edge Controller |
Use Scenario: PLC-connected metering module requiring immunity to 12 V rail ripple and transient surges. IC Role / Device Role / Timing Role: Post-regulator cleaning 12 V DC supply before feeding metrology ASIC. Use Value: 70 dB PSRR at 120 Hz attenuates switching noise from upstream DC/DC converters. | Use Scenario: DIN-rail mounted edge controller with multiple serial interfaces and real-time clock. IC Role / Device Role / Timing Role: Local 3.6 V supply for RTC backup and low-power wake-up circuitry. Use Value: EN pin enables firmware-controlled power gating to reduce system standby consumption by >95%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3602E/TO | Same 3.6 V output, but 250 mA max current and 1.6 µA quiescent current; TO-92 package. | Larger footprint and lower thermal performance; suited for low-current, cost-sensitive through-hole designs. | Prefer when board space allows TO-92 and ultra-low IQ dominates design priority over thermal density. |
| TPS7A2036PDQNR | 3.6 V fixed output, 300 mA rating, 6.5 µA IQ, but requires minimum 1 µF output capacitance with specific ESR range. | Higher current capability and lower IQ, but stricter capacitor requirements increase BOM complexity. | Choose when higher load margin or longer battery life justifies added capacitor qualification effort. |
Compared with MCP1700-3602E/TO and TPS7A2036PDQNR, the MIC5209-3.6BS offers balanced trade-offs: moderate IQ (120 µA), proven SOT-23-5 thermal performance, and relaxed capacitor requirements-ideal for space-constrained industrial sensor designs needing reliability over extreme ultra-low-power optimization.
Availability
MIC5209-3.6BS is available at Aetrix Electronics and suitable for industrial sensor nodes, portable data loggers, and smart meter interface modules requiring stable component supply and long-term manufacturability.
Supply support for MIC5209-3.6BS 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 family delivers high-accuracy, low-noise LDO regulators optimized for space-constrained, battery-operated, and thermally demanding embedded systems.
FAQ
What is the maximum input voltage rating for the MIC5209-3.6BS?
The MIC5209-3.6BS supports an absolute maximum input voltage of 16 V. Operation beyond this level risks permanent damage to the internal PNP pass transistor and bandgap reference circuitry. For reliable long-term use, maintain input within 4.5 V to 16 V, with derating recommended above 125°C ambient.
Does the MIC5209-3.6BS require an external capacitor on the ADJ/SEL pin?
No. The MIC5209-3.6BS is a fixed-output variant; the ADJ/SEL pin is internally connected to set the 3.6 V output and must be left unconnected or tied to GND per datasheet guidance. External components on this pin are unnecessary and may impair regulation accuracy.
Can the MIC5209-3.6BS be used without the EN pin connected?
Yes. The EN pin is internally pulled up; leaving it open defaults the MIC5209-3.6BS to active mode. However, tying EN to IN via a resistor is not recommended due to potential leakage-induced instability. For guaranteed enable behavior, connect EN directly to IN or use an active control signal.
What thermal performance can be expected from the MIC5209-3.6BS in SOT-23-5?
In standard JEDEC 2-layer board layout (1 in² copper), the MIC5209-3.6BS achieves θJA ≈ 220°C/W. At 150 mA and 350 mV dropout, power dissipation is 52.5 mW, resulting in ~11.6°C rise above ambient-well within safe operating limits without heatsinking.
Is the MIC5209-3.6BS compatible with ceramic output capacitors?
Yes. The MIC5209-3.6BS is stable with 1 µF or greater X5R/X7R ceramic capacitors on the output. Unlike some older LDOs, it does not require ESR-based damping, simplifying layout and reducing component count in compact designs.
MIC5209-3.6BS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 3.6V
- 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
MIC5209-3.6BS FAQ
1.How can I place an order for MIC5209-3.6BS through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5209-3.6BS 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 MIC5209-3.6BS reliable?
The price and inventory of MIC5209-3.6BS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5209-3.6BS is usually 5 days.
3.What payment methods are accepted for MIC5209-3.6BS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5209-3.6BS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5209-3.6BS?
MIC5209-3.6BS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5209-3.6BS 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 MIC5209-3.6BS?
For technical support, including MIC5209-3.6BS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5209-3.6BS requirements.
6.How does Aetrix verify that MIC5209-3.6BS is sourced from the original manufacturer or authorized distributors?
All MIC5209-3.6BS 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 MIC5209-3.6BS meets industry standards.
7.What is the process for return or replacement of MIC5209-3.6BS?
All MIC5209-3.6BS units undergo pre-shipment inspection (PSI). If there is an issue with MIC5209-3.6BS, 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 MIC5209-3.6BS part is unused and in its original packaging.
Return procedure for MIC5209-3.6BS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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