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Microchip Technology MIC5209-4.2BS TR
- Part No.:
- MIC5209-4.2BS TR
- Manufacturer:
- Microchip Technology
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
MIC5209-4.2BS TR.pdf
- Description:
- IC REG LINEAR 500MA LOW NOISE
- Quantity:
- Payment:
- Shipping:
Inventory:40,357
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Product details
Overview
MIC5209-4.2BS TR from Microchip Technology is a fixed-output 4.2 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, features thermal shutdown and current limiting, and is used in portable instrumentation and battery-powered microcontroller power rails.
For engineers reviewing the MIC5209-4.2BS TR datasheet, MIC5209-4.2BS TR pinout, MIC5209-4.2BS TR application, or MIC5209-4.2BS TR equivalent, key selection criteria include dropout voltage at 150 mA, guaranteed line/load regulation, thermal performance in SOT-23-5, and compatibility with Li-ion battery discharge profiles.
Technical Context
The MIC5209-4.2BS TR employs a PNP pass transistor architecture enabling stable regulation down to 350 mV dropout at rated load. It integrates internal current limiting and thermal foldback protection without requiring external components.
Designed for single-supply operation, it accepts input voltages up to 16 V while maintaining tight output regulation across temperature (−40°C to +125°C) and load (1 mA to 150 mA), with no minimum load requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.2 V ±2% - matches nominal fully charged Li-ion cell voltage for direct battery regulation. |
| Max Output Current | 150 mA - sufficient for MCU cores, sensors, and low-power RF transceivers. |
| Dropout Voltage | 350 mV at 150 mA - enables operation down to ~4.55 V input when regulating 4.2 V output. |
| Input Voltage Range | 2.5 V to 16 V - supports wide-input applications including multi-cell battery packs and industrial rails. |
| Quiescent Current | 140 µA typical - minimizes standby power loss in always-on battery systems. |
| Line Regulation | 0.05%/V - ensures stable output despite input rail fluctuations in noisy environments. |
Pinout & Package
Supplied in a 5-pin SOT-23 package with exposed thermal pad (SOT-23-5), optimized for compact PCB layouts and moderate power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Common return path for regulator feedback and load current; connects to thermal pad for heat sinking. |
| 2 (OUT) | Regulated output | Delivers stable 4.2 V to load; requires local 1 µF ceramic capacitor for stability. |
| 3 (ADJ/SENSE) | Feedback input | Internally tied to fixed 4.2 V reference; not user-adjustable on this variant. |
| 4 (IN) | Unregulated input | Accepts 2.5–16 V supply; must be decoupled with ≥1 µF ceramic capacitor near pin. |
| 5 (EN) | Enable control | Active-high logic input; pulls output to high-impedance state when driven low. |
Key Features
| Feature | Design Value |
|---|---|
| Low dropout voltage | 350 mV at 150 mA enables efficient use of declining Li-ion battery voltage. |
| Thermal shutdown protection | Automatically disables output above 160°C junction temperature to prevent damage during overload. |
| Current limit foldback | Reduces short-circuit current as output voltage drops, lowering power dissipation during fault. |
| No minimum load requirement | Stable regulation from 0 to 150 mA load simplifies design for intermittent-load systems. |
Applications
| Portable Medical Sensors | Li-ion Battery-Powered MCU Systems |
|---|---|
Use Scenario: Continuous glucose monitor with ultra-low-power BLE transmission. IC Role / Device Role / Timing Role: Primary 4.2 V supply regulator for analog front-end and Cortex-M0+ MCU. Use Value: Maintains regulated 4.2 V output down to 4.55 V input, extending usable battery life by >12% versus higher-dropout alternatives. | Use Scenario: Handheld barcode scanner with sleep/wake cycling. IC Role / Device Role / Timing Role: Always-on LDO powering real-time clock and wake-up circuitry. Use Value: 140 µA quiescent current minimizes drain during 95% sleep time, supporting >6-month battery life. |
| Industrial Data Loggers | Wearable Health Trackers |
Use Scenario: Remote environmental sensor node logging temperature/humidity every 10 seconds. IC Role / Device Role / Timing Role: Main power regulator for microcontroller and SD card interface. Use Value: Stable ±2% output accuracy ensures consistent ADC reference and flash programming voltage margins. | Use Scenario: Optical heart-rate monitor with photodiode amplifier chain. IC Role / Device Role / Timing Role: Low-noise 4.2 V supply for analog signal conditioning stage. Use Value: 350 mV dropout allows uninterrupted operation until battery reaches 4.55 V, aligning with safe Li-ion cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-4202E/TT | 250 mA output, 175 mV dropout at 250 mA, 1.6 µA quiescent current. | Better efficiency in ultra-low-IQ sleep modes but lower max current. | Select when system peak load ≤250 mA and standby current is critical. |
| TPS76342DBVR | 150 mA output, 350 mV dropout at 150 mA, 80 µA quiescent current, wider temp range (−40°C to +150°C). | Higher ambient temperature tolerance; slightly lower IQ. | Select for extended-temperature industrial deployments where reliability margin is prioritized. |
Compared with MCP1700T-4202E/TT and TPS76342DBVR, the MIC5209-4.2BS TR offers balanced performance for cost-sensitive portable designs requiring 150 mA, 4.2 V regulation with proven thermal behavior in SOT-23-5, while maintaining compatibility with standard Li-ion charge termination voltages.
Availability
MIC5209-4.2BS TR is available at Aetrix Electronics and suitable for portable medical sensors, Li-ion battery-powered MCU systems, and industrial data loggers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC5209-4.2BS TR 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 manufacturer specializing in microcontrollers, analog devices, and power management ICs for embedded and industrial applications.
The MIC5209 family delivers precision, low-dropout linear regulation for battery-powered and space-constrained systems, with fixed-output variants like MIC5209-4.2BS TR targeting Li-ion-based portable electronics.
FAQ
What is the maximum input voltage rating for the MIC5209-4.2BS TR?
The MIC5209-4.2BS TR supports an absolute maximum input voltage of 16 V. Operation beyond this rating risks permanent damage. For reliable long-term use, design input rails to remain within 2.5 V to 16 V, with derating recommended above 125°C ambient temperature. The MIC5209-4.2BS TR maintains regulation across this full range when load and thermal conditions are within specification.
Does the MIC5209-4.2BS TR require an external output capacitor?
Yes, the MIC5209-4.2BS TR requires a minimum 1 µF ceramic capacitor at the OUT pin for stability, as specified in the official Microchip datasheet. Larger values (e.g., 2.2 µF) improve transient response but are not mandatory. Tantalum or aluminum electrolytic capacitors are not recommended due to ESR and reliability concerns. The MIC5209-4.2BS TR will not regulate properly without this capacitor.
Is the MIC5209-4.2BS TR compatible with lithium-ion battery charging termination voltage?
Yes, the MIC5209-4.2BS TR's fixed 4.2 V ±2% output directly matches the standard full-charge termination voltage of single-cell Li-ion batteries (4.20 V ±0.05 V). This makes it suitable for post-charge regulation in battery-powered systems where the battery feeds the LDO input. The MIC5209-4.2BS TR sustains regulation until input drops to ~4.55 V, aligning with typical Li-ion discharge curves.
What thermal protection features does the MIC5209-4.2BS TR include?
The MIC5209-4.2BS TR integrates thermal shutdown that disables the output when junction temperature exceeds approximately 160°C. It also includes current-limit foldback, reducing short-circuit current as output voltage collapses to limit power dissipation. These protections activate independently and automatically reset upon cooling or load removal. The MIC5209-4.2BS TR does not latch off permanently.
Can the MIC5209-4.2BS TR operate without a minimum load current?
Yes, the MIC5209-4.2BS TR is specified for stable operation from zero load up to 150 mA - no minimum load is required. This eliminates the need for bleed resistors in low-power or intermittent-load applications such as real-time clocks or sensor wake-up circuits. The MIC5209-4.2BS TR maintains output accuracy and transient response across the full 0–150 mA range per its datasheet specifications.
MIC5209-4.2BS TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 4.2V
- 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
MIC5209-4.2BS TR FAQ
1.How can I place an order for MIC5209-4.2BS TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5209-4.2BS TR 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 MIC5209-4.2BS TR reliable?
The price and inventory of MIC5209-4.2BS TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5209-4.2BS TR is usually 5 days.
3.What payment methods are accepted for MIC5209-4.2BS TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5209-4.2BS TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5209-4.2BS TR?
MIC5209-4.2BS TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5209-4.2BS TR 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 MIC5209-4.2BS TR?
For technical support, including MIC5209-4.2BS TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5209-4.2BS TR requirements.
6.How does Aetrix verify that MIC5209-4.2BS TR is sourced from the original manufacturer or authorized distributors?
All MIC5209-4.2BS TR 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 MIC5209-4.2BS TR meets industry standards.
7.What is the process for return or replacement of MIC5209-4.2BS TR?
All MIC5209-4.2BS TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5209-4.2BS TR, 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 MIC5209-4.2BS TR part is unused and in its original packaging.
Return procedure for MIC5209-4.2BS TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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