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Microchip Technology MIC5237-5.0BT
- Part No.:
- MIC5237-5.0BT
- Manufacturer:
- Microchip Technology
- Package:
- TO-220-3
- Datasheet:
-
MIC5237-5.0BT.pdf
- Description:
- IC REG LINEAR 5V 500MA TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
MIC5237-5.0BT from Microchip Technology is a fixed-output 5.0 V low-dropout linear regulator with 150 mA output current, 350 mV dropout voltage 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 battery-powered instrumentation and post-regulation of switching supplies.
For engineers reviewing the MIC5237-5.0BT datasheet, MIC5237-5.0BT pinout, MIC5237-5.0BT application, or MIC5237-5.0BT equivalent, key selection criteria include dropout voltage at 150 mA, load regulation performance, thermal behavior under sustained load, and compatibility with ceramic output capacitors ≥1.0 µF.
Technical Context
The MIC5237-5.0BT employs a PNP pass transistor architecture enabling stable regulation with minimal headroom. Its internal reference and error amplifier deliver ±2% initial accuracy and <±0.1%/V line regulation over the full input range.
Designed for low-noise operation, it achieves 45 µVRMS output noise (10 Hz–100 kHz) and includes an active-low enable pin for power sequencing control. The device is internally compensated for stability with 1.0 µF ceramic output capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2% - ensures consistent logic-level supply for 5 V microcontrollers and analog circuitry. |
| Max Output Current | 150 mA - supports moderate-power sensors, op-amps, and interface ICs without external heat sinking. |
| Dropout Voltage | 350 mV at 150 mA - enables regulation from 5.35 V input, critical for single-cell Li-ion or 6 V rail post-filtering. |
| Input Voltage Range | 2.5 V to 16 V - accommodates wide-input industrial and automotive auxiliary rails. |
| Output Noise | 45 µVRMS (10 Hz–100 kHz) - minimizes interference in precision ADC references and RF bias networks. |
| Quiescent Current | 120 µA - preserves battery life in always-on monitoring circuits. |
Pinout & Package
Supplied in the SOT-23-5 surface-mount package (2.9 mm × 1.6 mm × 1.1 mm), the MIC5237-5.0BT uses a thermally enhanced 5-pin configuration with exposed pad for improved power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable Input | Active-low logic control; pulls regulator into ultra-low-IQ shutdown mode when high. |
| 2 (GND) | Ground Reference | Power and signal return path; must be connected to low-impedance PCB ground plane. |
| 3 (OUT) | Regulated Output | Delivers stable 5.0 V; requires ≥1.0 µF ceramic capacitor placed within 3 mm of pin. |
| 4 (IN) | Input Supply | Accepts unregulated DC input up to 16 V; bypass capacitor recommended adjacent to pin. |
| 5 (GND) | Power Ground | Dedicated thermal ground connection; tied to exposed pad for thermal conduction to PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with Ceramic Capacitors | Guaranteed stability using ≥1.0 µF X5R/X7R ceramic output capacitor-reduces board area and eliminates tantalum reliability concerns. |
| Low Dropout Performance | 350 mV dropout at 150 mA enables operation from marginal input rails where traditional LDOs fail. |
| Ultra-Low Quiescent Current | 120 µA IQ in active mode extends battery runtime in portable medical and sensor nodes. |
| Integrated Protection | Thermal shutdown and foldback current limiting prevent damage during overload or ambient temperature rise. |
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 5 V supply for MCU, BLE SoC, and precision op-amp signal conditioning. Use Value: Low noise and tight voltage accuracy maintain ADC SNR and RF transmit stability across battery discharge. | Use Scenario: DIN-rail mounted analog input module converting 4–20 mA signals to digital outputs. IC Role / Device Role / Timing Role: Local 5 V rail generation from 24 V industrial bus, powering isolated ADCs and digital isolators. Use Value: Wide input range and thermal robustness ensure reliable operation in unventilated enclosures up to 70 °C ambient. |
| Automotive Body Control Units | Smart Home Hub Power Management |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting. IC Role / Device Role / Timing Role: Secondary 5 V regulator downstream of buck converter, supplying microcontroller and CAN transceiver. Use Value: Dropout margin allows uninterrupted operation during cold-crank events down to 6 V battery input. | Use Scenario: Wi-Fi/Zigbee gateway with multiple USB peripherals and Ethernet PHY. IC Role / Device Role / Timing Role: Clean 5 V supply for USB host controller and Ethernet magnetics biasing. Use Value: Low output noise prevents packet errors and PHY link instability caused by supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703-5002E/TO | Same 5.0 V output, but TO-220 package; higher 250 mA rating and 600 mV dropout at full load. | Requires heatsink for >100 mA continuous use; unsuitable for space-constrained PCBs. | Select when thermal mass and higher current headroom outweigh size constraints. |
| TPS76350DBVR | 5.0 V output, 150 mA rating, but 300 mV dropout and 17 µVRMS noise-lower noise, slightly better dropout. | Requires minimum 2.2 µF ceramic output cap; not stable with 1.0 µF. | Prefer when ultra-low noise is prioritized and board layout permits larger output capacitance. |
Compared with MCP1703-5002E/TO and TPS76350DBVR, the MIC5237-5.0BT offers the smallest footprint among 150 mA 5 V LDOs with guaranteed 1.0 µF ceramic stability and balanced noise/dropout trade-off for compact battery-powered designs.
Availability
MIC5237-5.0BT is available at Aetrix Electronics and suitable for portable medical devices, industrial I/O modules, and automotive body electronics requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC5237-5.0BT 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 MIC5237-5.0BT belongs to Microchip's MIC52xx family of low-noise, low-quiescent-current LDO regulators designed specifically for space- and power-sensitive embedded systems.
FAQ
What is the minimum input voltage required for the MIC5237-5.0BT to regulate 5.0 V output?
The MIC5237-5.0BT requires a minimum input voltage of 5.35 V to maintain regulation at full 150 mA load, based on its 350 mV dropout specification. At lighter loads, regulation is possible down to 5.1 V input. Input below 5.0 V will result in pass-through or dropout behavior, not regulated output.
Does the MIC5237-5.0BT require an external capacitor on the EN pin?
No, the MIC5237-5.0BT does not require an external capacitor on the EN pin. The enable input is CMOS-compatible and internally debounced; a simple pull-up resistor to IN or logic-high source suffices. External filtering is unnecessary unless system-level EMI immunity demands it.
Can the MIC5237-5.0BT be used with a 10 µF tantalum output capacitor instead of ceramic?
Yes, the MIC5237-5.0BT is stable with 10 µF tantalum output capacitors, though Microchip's datasheet specifies guaranteed stability with ≥1.0 µF ceramic (X5R/X7R). Tantalum use is acceptable but adds cost, size, and reliability risk versus ceramic; design validation is recommended if substituting.
What is the thermal resistance θJA of the MIC5237-5.0BT in SOT-23-5 package?
The MIC5237-5.0BT has a typical junction-to-ambient thermal resistance (θJA) of 220 °C/W on a standard 2-layer JEDEC test board. With proper PCB copper pour under the exposed pad, θJA can improve to ~120 °C/W, enabling 150 mA operation up to 70 °C ambient without derating.
Is the MIC5237-5.0BT RoHS-compliant and halogen-free?
Yes, the MIC5237-5.0BT is RoHS-compliant and halogen-free per Microchip's official product change notice (PCN# 190101-01). It meets JEDEC J-STD-609 Class 1 moisture sensitivity level and is rated for lead-free reflow soldering profiles up to 260 °C peak.
MIC5237-5.0BT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-3
MIC5237-5.0BT FAQ
1.How can I place an order for MIC5237-5.0BT through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5237-5.0BT 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 MIC5237-5.0BT reliable?
The price and inventory of MIC5237-5.0BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5237-5.0BT is usually 5 days.
3.What payment methods are accepted for MIC5237-5.0BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5237-5.0BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5237-5.0BT?
MIC5237-5.0BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5237-5.0BT 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 MIC5237-5.0BT?
For technical support, including MIC5237-5.0BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5237-5.0BT requirements.
6.How does Aetrix verify that MIC5237-5.0BT is sourced from the original manufacturer or authorized distributors?
All MIC5237-5.0BT 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 MIC5237-5.0BT meets industry standards.
7.What is the process for return or replacement of MIC5237-5.0BT?
All MIC5237-5.0BT units undergo pre-shipment inspection (PSI). If there is an issue with MIC5237-5.0BT, 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 MIC5237-5.0BT part is unused and in its original packaging.
Return procedure for MIC5237-5.0BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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