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Microchip Technology MIC5237-2.5BU
- Part No.:
- MIC5237-2.5BU
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- Datasheet:
-
MIC5237-2.5BU.pdf
- Description:
- IC REG LINEAR 2.5V 500MA TO263-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,079
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Product details
Overview
MIC5237-2.5BU from Microchip Technology is a fixed-output 2.5 V low-dropout linear regulator (LDO) with 150 mA output current, 350 mV dropout at full load, and ±2% output voltage accuracy over temperature and line/load conditions; it operates from 2.5 V to 16 V input and is used in portable instrumentation and battery-powered microcontroller power rails.
For engineers reviewing the MIC5237-2.5BU datasheet, MIC5237-2.5BU pinout, MIC5237-2.5BU application, or MIC5237-2.5BU equivalent, key selection criteria include dropout voltage at 150 mA, thermal shutdown behavior, reverse-battery protection, and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MIC5237-2.5BU integrates a PNP pass transistor with internal current limiting, thermal shutdown, and reverse-battery protection circuitry. It delivers stable 2.5 V output without requiring an external bypass capacitor on the output for stability.
Its quiescent current remains below 120 µA across the full input voltage range and load conditions, and it maintains regulation down to 1 µA load current - enabling use in always-on monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% (guaranteed over -40°C to +125°C, 10 mA–150 mA load) |
| Max Output Current | 150 mA (continuous; limited by thermal dissipation in SOT-23-5) |
| Dropout Voltage | 350 mV at 150 mA (enables operation with Vin as low as 2.85 V while maintaining 2.5 V out) |
| Input Voltage Range | 2.5 V to 16 V (supports single-cell LiFePO₄ up to 4S Li-ion battery stacks) |
| Quiescent Current | ≤120 µA (enables >1-year battery life in 10 µA sleep-mode systems) |
| PSRR | 70 dB at 120 Hz (suppresses ripple from switching DC/DC converters upstream) |
Pinout & Package
Package: SOT-23-5 (Moisture Sensitivity Level 1, Pb-free, RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Common return path for load current and internal bias; requires low-impedance connection to PCB ground plane |
| IN | Input supply | Accepts unregulated 2.5–16 V; must be decoupled with ≥1 µF ceramic capacitor near pin |
| EN | Enable control | Active-high logic input; pulls device into shutdown (<1 µA IQ) when driven low |
| OUT | Regulated output | Delivers 2.5 V ±2%; no external capacitor required for stability |
| ADJ/SENSE | Voltage feedback | Internally connected to 2.5 V reference; not user-accessible in fixed-output variant |
Key Features
| Feature | Design Value |
|---|---|
| Reverse-battery protection | Prevents damage and reverse current flow when input polarity is inverted - no external diode needed |
| Thermal shutdown with hysteresis | Activates at +160°C junction temperature and releases at +140°C, preventing thermal oscillation during overload |
| No output capacitor required | Guaranteed stability with zero output capacitance - reduces BOM count and board area in ultra-compact designs |
| Low-noise operation | 40 µVRMS output noise (10 Hz–100 kHz) - suitable for ADC reference and sensor signal conditioning rails |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Powering analog front-end circuitry in handheld ECG or pulse oximeter units operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: LDO regulator providing clean, stable 2.5 V supply to precision op-amps and 12-bit SAR ADCs. Use Value: 40 µVRMS noise and <120 µA quiescent current extend battery runtime while preserving signal integrity. | Use Scenario: Local regulation for isolated digital I/O channel power in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Post-regulator delivering 2.5 V to optocoupler LED drivers and level-shifting logic. Use Value: Reverse-battery protection prevents field wiring faults from damaging downstream logic; 350 mV dropout enables operation during brownout events. |
| Wireless Sensor Nodes | Automotive Body Control Modules |
Use Scenario: Supplying low-power microcontrollers (e.g., PIC16LF18326) and sub-GHz RF transceivers in battery-operated IoT endpoints. IC Role / Device Role / Timing Role: Primary voltage regulator enabling deep-sleep modes with <1 µA shutdown current via EN pin control. Use Value: Enable pin allows synchronized power gating across multiple subsystems, reducing system-level standby current by >95%. | Use Scenario: Powering LIN transceiver bias rails and EEPROM interface logic in door module ECUs. IC Role / Device Role / Timing Role: Secondary LDO supplying 2.5 V to LIN physical layer ICs compliant with ISO 17987-2. Use Value: 16 V max input rating accommodates automotive load-dump transients up to 14.5 V nominal + 25% tolerance. |
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 | Same 2.5 V output, but 250 mA rated; higher quiescent current (1.6 µA typical vs. 120 µA) | Lacks reverse-battery protection and thermal hysteresis; requires output capacitor | Preferred where higher output current is needed and reverse-polarity risk is absent |
| TN0525D | 2.5 V fixed output, 150 mA, but only 6 V max input; no enable pin | Not suitable for 12 V automotive or multi-cell battery inputs; no shutdown control | Only viable in low-input-voltage, always-on applications with no polarity or sequencing requirements |
Compared with MCP1700-2502E/TO and TN0525D, the MIC5237-2.5BU uniquely combines reverse-battery protection, enable-controlled shutdown, and capacitor-free stability - making it optimal for battery-powered systems exposed to field wiring risks and demanding ultra-low quiescent current.
Availability
MIC5237-2.5BU is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and wireless sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5237-2.5BU 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, and power management ICs for industrial, automotive, and consumer applications.
The MIC5237 series is designed for space-constrained, battery-sensitive applications requiring high accuracy, low dropout, and robust fault protection - particularly in portable instrumentation and embedded control systems.
FAQ
What is the maximum input voltage rating for the MIC5237-2.5BU?
The MIC5237-2.5BU supports an absolute maximum input voltage of 16 V. This rating allows direct use with 4-cell alkaline or Li-ion battery stacks and withstands transient overvoltages common in automotive and industrial environments, provided power dissipation remains within thermal limits defined by the SOT-23-5 package and PCB layout.
Does the MIC5237-2.5BU require an output capacitor for stability?
No, the MIC5237-2.5BU is internally compensated and guaranteed stable with zero output capacitance. This eliminates the need for external ceramic capacitors, reducing bill-of-materials cost and PCB footprint - a key advantage over most competing LDOs that mandate minimum 1 µF output capacitance.
How does the enable (EN) pin function on the MIC5237-2.5BU?
The EN pin on the MIC5237-2.5BU is an active-high logic input. When pulled high (≥2.0 V), the device regulates normally; when pulled low (<0.4 V), it enters shutdown mode drawing less than 1 µA quiescent current. This enables precise power sequencing and ultra-low-power sleep states in battery-powered systems using the MIC5237-2.5BU.
What protection features are integrated into the MIC5237-2.5BU?
The MIC5237-2.5BU integrates reverse-battery protection, thermal shutdown with hysteresis (trip at +160°C, release at +140°C), and internal current limiting. These features eliminate the need for external protection components and ensure reliable operation under fault conditions such as incorrect battery insertion or sustained overload - critical for field-deployed equipment using the MIC5237-2.5BU.
Is the MIC5237-2.5BU compatible with lead-free reflow soldering processes?
Yes, the MIC5237-2.5BU is packaged in a RoHS-compliant, lead-free SOT-23-5 case rated for standard Pb-free reflow profiles (JEDEC J-STD-020). Its moisture sensitivity level is MSL1, meaning it can be stored indefinitely at ambient conditions without baking prior to assembly - simplifying manufacturing logistics for the MIC5237-2.5BU.
MIC5237-2.5BU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
- 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):
- 0.7V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- 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:
- TO-263-3
MIC5237-2.5BU FAQ
1.How can I place an order for MIC5237-2.5BU through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5237-2.5BU 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 MIC5237-2.5BU reliable?
The price and inventory of MIC5237-2.5BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5237-2.5BU is usually 5 days.
3.What payment methods are accepted for MIC5237-2.5BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5237-2.5BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5237-2.5BU?
MIC5237-2.5BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5237-2.5BU 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 MIC5237-2.5BU?
For technical support, including MIC5237-2.5BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5237-2.5BU requirements.
6.How does Aetrix verify that MIC5237-2.5BU is sourced from the original manufacturer or authorized distributors?
All MIC5237-2.5BU 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 MIC5237-2.5BU meets industry standards.
7.What is the process for return or replacement of MIC5237-2.5BU?
All MIC5237-2.5BU units undergo pre-shipment inspection (PSI). If there is an issue with MIC5237-2.5BU, 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 MIC5237-2.5BU part is unused and in its original packaging.
Return procedure for MIC5237-2.5BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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