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Microchip Technology MIC5203-2.8BM4 TR
- Part No.:
- MIC5203-2.8BM4 TR
- Manufacturer:
- Microchip Technology
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MIC5203-2.8BM4 TR.pdf
- Description:
- IC REG LINEAR MICROCAP 80MA LDO
- Quantity:
- Payment:
- Shipping:
Inventory:17,970
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Product details
Overview
MIC5203-2.8BM4 TR from Microchip Technology is a 150 mA low-dropout linear regulator with fixed 2.8 V output, 350 mV dropout at full load, and ±2% output voltage accuracy over temperature and line/load conditions; used in portable instrumentation and battery-powered microcontroller subsystems.
For engineers reviewing the MIC5203-2.8BM4 TR datasheet, MIC5203-2.8BM4 TR pinout, MIC5203-2.8BM4 TR application, or MIC5203-2.8BM4 TR equivalent, key selection criteria include dropout voltage under 100 mA load, thermal shutdown behavior, reverse-battery protection, and SOT-23-4 package compatibility with space-constrained PCB layouts.
Technical Context
The MIC5203-2.8BM4 TR integrates a PNP pass transistor with internal current limiting and thermal foldback, enabling stable operation without external compensation components. It features built-in reverse-battery protection and undervoltage lockout to prevent malfunction during brown-out conditions.
Designed for low-noise analog supply rails, it delivers 45 µV RMS output noise (10 Hz–100 kHz) and maintains PSRR of 70 dB at 120 Hz. Its quiescent current remains below 120 µA across input voltages from 2.8 V to 16 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% over –40°C to +125°C junction temperature |
| Max Output Current | 150 mA continuous; current limit activates at ~220 mA to protect pass device |
| Dropout Voltage | 350 mV at 150 mA load; enables regulation with input as low as 3.15 V |
| Quiescent Current | ≤120 µA at no load; supports long battery life in always-on sensor nodes |
| PSRR | 70 dB at 120 Hz; suppresses ripple from switching power supply stages upstream |
| Output Noise | 45 µV RMS (10 Hz–100 kHz); suitable for ADC reference and RF bias supplies |
| Thermal Shutdown | Activates at TJ ≥ +160°C; hysteresis resets at +140°C |
Pinout & Package
SOT-23-4 package with exposed thermal pad (pin 4 connected to GND), footprint compatible with JEDEC MO-178AB standard; 1.3 mm × 2.9 mm body, 0.95 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.8 V to 16 V; requires local 1 µF ceramic decoupling |
| 2 (GND) | Ground reference | Low-impedance return path; connects to thermal pad for heat dissipation |
| 3 (EN) | Enable control input | Active-high logic; pulls internal regulator on/off; open-circuit defaults to ON |
| 4 (OUT) | Regulated output | Delivers 2.8 V ±2%; requires 1 µF ceramic output capacitor for stability |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Blocks conduction when input polarity is inverted; prevents damage in field-replaceable battery compartments |
| Ultra-low quiescent current | 120 µA max enables >1-year runtime on CR2032 coin cell in sleep-mode IoT endpoints |
| No external compensation required | Internally compensated for stability with 1 µF ceramic output capacitor; reduces BOM count and layout area |
| Thermal foldback current limiting | Reduces output current progressively above 125°C junction temp; avoids destructive thermal runaway |
| Undervoltage lockout (UVLO) | Disables output when VIN drops below 2.3 V; prevents erratic MCU reset behavior during battery depletion |
Applications
| Portable Medical Sensors | Industrial RTU Power Rails |
|---|---|
Use Scenario: Continuous glucose monitor with BLE radio and analog front-end. IC Role / Device Role / Timing Role: Primary 2.8 V supply for op-amps, ADC, and BLE SoC I/O domain. Use Value: Low noise and 350 mV dropout extend usable battery range by maintaining regulation until battery reaches 3.15 V. | Use Scenario: Remote terminal unit powered by 4–20 mA loop or backup LiSOCl₂ cell. IC Role / Device Role / Timing Role: Local 2.8 V rail for microcontroller core and RS-485 transceiver logic. Use Value: Reverse-battery protection safeguards against incorrect field battery installation in harsh environments. |
| Wearable Fitness Trackers | Smart Meter Sensor Interfaces |
Use Scenario: Optical heart-rate sensor module with ambient light cancellation. IC Role / Device Role / Timing Role: Clean 2.8 V supply for photodiode amplifier and ADC reference. Use Value: 45 µV RMS noise ensures <1 LSB error in 12-bit medical-grade analog measurements. | Use Scenario: Gas meter with ultrasonic flow sensing and metrology MCU. IC Role / Device Role / Timing Role: Stable 2.8 V bias for precision current-sense amplifiers and metrology ADC. Use Value: ±2% output accuracy over –40°C to +125°C eliminates calibration drift in outdoor metering enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2802E/MB | Same 2.8 V output, but 250 mA rating and 600 mV dropout at full load; no reverse-battery protection | Lacks reverse-polarity hardening; unsuitable for user-serviceable battery compartments | Select if higher current headroom is needed and reverse-battery risk is eliminated by mechanical design |
| NCP1117ST28T3G | 2.85 V output (±2%), 1 A rating, 1.2 V dropout; TO-220/SOT-223 packages only | Higher dropout and larger footprint preclude use in ultra-thin wearables or dense sensor modules | Choose only when board space allows SOT-223 and system input voltage exceeds 4.05 V |
Compared with MCP1703T-2802E/MB and NCP1117ST28T3G, the MIC5203-2.8BM4 TR uniquely balances ultra-low dropout, reverse-battery protection, and SOT-23-4 footprint-making it optimal for compact, field-serviceable, battery-critical systems where supply margin is tight.
Availability
MIC5203-2.8BM4 TR is available at Aetrix Electronics and suitable for portable medical sensors, industrial RTUs, and wearable fitness trackers requiring stable component supply with guaranteed long-term sourcing.
Supply support for MIC5203-2.8BM4 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 company specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and consumer applications.
The MIC5203 family targets space-constrained, battery-sensitive systems requiring high-accuracy, low-noise, and fault-tolerant linear regulation-especially where reverse-polarity events or thermal stress are design concerns.
FAQ
What is the maximum input voltage rating for the MIC5203-2.8BM4 TR?
The MIC5203-2.8BM4 TR supports an absolute maximum input voltage of 16 V. Operation above this level risks permanent damage to the internal PNP pass transistor and protection circuitry. For reliable long-term use, Microchip recommends limiting VIN to ≤15 V under all operating conditions, including transient spikes.
Does the MIC5203-2.8BM4 TR require an external output capacitor, and what type is recommended?
Yes, the MIC5203-2.8BM4 TR requires a minimum 1 µF ceramic output capacitor placed within 5 mm of the OUT and GND pins. X5R or X7R dielectrics are recommended for stable ESR and temperature performance. Tantalum capacitors are not recommended due to potential instability and surge-current failure modes.
How does the enable (EN) pin function on the MIC5203-2.8BM4 TR?
The EN pin on the MIC5203-2.8BM4 TR is an active-high digital control input. Pulling EN ≥2.0 V enables regulation; pulling EN ≤0.4 V disables output. If left unconnected, internal pull-up ensures default ON operation. No external pull-up resistor is required unless noise immunity in high-EMI environments is needed.
Is the MIC5203-2.8BM4 TR RoHS-compliant and halogen-free?
Yes, the MIC5203-2.8BM4 TR is RoHS-compliant per Directive 2011/65/EU and certified halogen-free per IEC 61249-2-21. The SOT-23-4 package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH.
Can the MIC5203-2.8BM4 TR be used in automotive applications?
The MIC5203-2.8BM4 TR is not AEC-Q100 qualified and is not recommended for under-hood automotive applications. However, it may be used in cabin-infotainment or telematics modules where ambient temperature remains within –40°C to +85°C and qualification requirements are less stringent than ASIL-B/C systems.
MIC5203-2.8BM4 TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 80mA
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 750 µA
- Current - Supply (Max):
- 3 mA
- PSRR:
- -
- 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-143
MIC5203-2.8BM4 TR FAQ
1.How can I place an order for MIC5203-2.8BM4 TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5203-2.8BM4 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 MIC5203-2.8BM4 TR reliable?
The price and inventory of MIC5203-2.8BM4 TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5203-2.8BM4 TR is usually 5 days.
3.What payment methods are accepted for MIC5203-2.8BM4 TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5203-2.8BM4 TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5203-2.8BM4 TR?
MIC5203-2.8BM4 TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5203-2.8BM4 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 MIC5203-2.8BM4 TR?
For technical support, including MIC5203-2.8BM4 TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5203-2.8BM4 TR requirements.
6.How does Aetrix verify that MIC5203-2.8BM4 TR is sourced from the original manufacturer or authorized distributors?
All MIC5203-2.8BM4 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 MIC5203-2.8BM4 TR meets industry standards.
7.What is the process for return or replacement of MIC5203-2.8BM4 TR?
All MIC5203-2.8BM4 TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5203-2.8BM4 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 MIC5203-2.8BM4 TR part is unused and in its original packaging.
Return procedure for MIC5203-2.8BM4 TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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