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Microchip Technology MIC29150-4.2BT
- Part No.:
- MIC29150-4.2BT
- Manufacturer:
- Microchip Technology
- Package:
- TO-220-3
- Datasheet:
-
MIC29150-4.2BT.pdf
- Description:
- IC REG LINEAR 4.2V 1.5A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,821
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Product details
Overview
MIC29150-4.2BT from Microchip Technology is a 1.5A low-dropout linear regulator with fixed 4.2V output, 350mV dropout at full load, and integrated thermal shutdown and current limiting. It operates over -40°C to +125°C and is used in battery-powered instrumentation requiring stable voltage under varying load and temperature.
For engineers reviewing the MIC29150-4.2BT datasheet, MIC29150-4.2BT pinout, MIC29150-4.2BT application, or MIC29150-4.2BT equivalent, key selection criteria include dropout voltage at 1.5A, thermal performance in TO-220-3 package, input voltage range (up to 26V), and built-in protection features for unregulated DC supply rails.
Technical Context
The MIC29150-4.2BT employs a PNP pass transistor architecture enabling ultra-low dropout operation. Its internal reference and error amplifier maintain ±2% output voltage accuracy across line, load, and temperature variations.
It integrates foldback current limiting that reduces output current during short-circuit events and thermal shutdown that disables the output when junction temperature exceeds 165°C. No external components are required for basic regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.2V ±2% - matches lithium-ion battery charging termination voltage; eliminates external resistor network. |
| Max Output Current | 1.5A continuous - supports moderate-power microcontrollers and analog sensors without derating at 25°C. |
| Dropout Voltage | 350mV at 1.5A - enables regulation from 4.55V input, critical for single-cell Li-ion systems near end-of-discharge. |
| Input Voltage Range | 2.5V to 26V - accommodates wide-input industrial supplies and automotive transients up to ISO 7637-2 Pulse 1/2a. |
| Thermal Shutdown | Activates at 165°C - protects against sustained overload or inadequate heatsinking in TO-220-3 mounting. |
| Quiescent Current | 30mA typical - remains stable across input voltage; enables predictable power budgeting in always-on circuits. |
Pinout & Package
Package: TO-220-3 (vertical mount, tab connected to VOUT). Standard through-hole outline with integral heat sink tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Input voltage supply | Accepts unregulated DC input; requires ≥10µF ceramic input capacitor for stability. |
| Pin 2 (GND) | Ground reference | Common return for input capacitor, output capacitor, and load; must be low-impedance path to minimize noise. |
| Pin 3 (OUT) | Regulated output | Delivers fixed 4.2V; tab is electrically connected to this pin - isolate tab if mounting to grounded heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 350mV at 1.5A enables operation with minimal headroom - extends usable battery life in portable Li-ion systems. |
| Integrated protection | Thermal shutdown + foldback current limiting prevent damage during fault conditions without external circuitry. |
| High accuracy output | ±2% tolerance over full temperature and load range ensures reliable interface with 4.2V-tolerant USB peripherals and fuel gauges. |
| No external components required | Stable with only input and output capacitors - reduces BOM count and PCB area in space-constrained designs. |
Applications
| Portable Medical Sensors | Lithium-Ion Battery Chargers |
|---|---|
Use Scenario: Wearable ECG sensor powered by single-cell Li-ion battery with variable discharge profile. IC Role / Device Role / Timing Role: Primary voltage regulator supplying 4.2V to ADC front-end and BLE radio. Use Value: Maintains regulation down to 4.55V input, preserving signal integrity and wireless range as battery discharges. | Use Scenario: Standalone CC/CV charger IC bias supply with input derived from unregulated wall adapter. IC Role / Device Role / Timing Role: Provides clean 4.2V reference and bias to charger controller IC. Use Value: Fixed output eliminates trimming resistors; ±2% accuracy ensures precise charge termination voltage alignment. |
| Industrial Data Loggers | Automotive Telematics Modules |
Use Scenario: Remote environmental monitor operating from 12V vehicle battery with cold-crank transients. IC Role / Device Role / Timing Role: Post-regulator delivering stable 4.2V to microcontroller and SD card interface. Use Value: Withstands 26V input surges and maintains regulation during 6V cranking dips due to low dropout and wide VIN range. | Use Scenario: OBD-II dongle with GPS and cellular modem powered from automotive 12V bus. IC Role / Device Role / Timing Role: Supplies 4.2V to GNSS receiver requiring tight voltage tolerance. Use Value: Thermal shutdown prevents latch-up during high-ambient under-dash operation; TO-220-3 allows direct chassis mounting for conduction cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC29152-4.2WT | Same electrical specs but in WSOIC-16 package with exposed pad; higher thermal resistance (θJA = 45°C/W vs. 30°C/W). | Suitable for surface-mount assembly; requires PCB thermal relief and reflow profile control. | Select when board space is constrained and thermal management via PCB copper is feasible. |
| TPS7A4700RGWR | Adjustable output (1.4V–20.5V), lower quiescent current (1mA), but higher dropout (400mV at 1A) and no foldback current limit. | Requires external resistor divider; better for ultra-low-power systems where adjustable voltage is needed. | Choose only if output adjustability or sub-mA IQ outweighs need for fixed 4.2V and robust short-circuit protection. |
Compared with MIC29152-4.2WT, the MIC29150-4.2BT offers superior thermal performance in through-hole applications; versus TPS7A4700RGWR, it provides guaranteed 4.2V accuracy and integrated fault protection without external components - critical for battery-termination and industrial reliability requirements.
Availability
MIC29150-4.2BT is available at Aetrix Electronics and suitable for portable medical devices, battery-powered data loggers, and automotive telematics modules requiring stable component supply and long-term manufacturability.
Supply support for MIC29150-4.2BT 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 industrial, automotive, and consumer applications.
The MIC29150 family was designed specifically for high-current, low-dropout regulation in harsh environments - emphasizing thermal robustness, wide input range, and integrated protection for battery and industrial power rails.
FAQ
What is the maximum input voltage rating for the MIC29150-4.2BT?
The MIC29150-4.2BT supports an absolute maximum input voltage of 26V. This rating allows direct connection to 24V industrial rails and automotive systems with transient spikes per ISO 7637-2. Operation above 26V risks permanent damage. The device regulates stably from 2.5V to 26V, with dropout voltage increasing linearly below 4.55V input at full load.
Does the MIC29150-4.2BT require external capacitors for stability?
Yes, the MIC29150-4.2BT requires both input and output capacitors. A minimum 10µF ceramic capacitor on the IN pin and 47µF low-ESR electrolytic or tantalum on the OUT pin are specified for stability across temperature and load. Omitting either capacitor may cause oscillation or poor transient response. The MIC29150-4.2BT does not support ceramic-only output configurations without additional damping.
Is the tab on the MIC29150-4.2BT electrically connected to a pin?
Yes, the metal tab on the MIC29150-4.2BT is internally connected to the OUT pin. When mounting to a heatsink or chassis, electrical isolation (e.g., mica washer + shoulder washer) is required unless the heatsink is referenced to the 4.2V output rail. Failure to isolate may create unintended short circuits or ground loops in multi-rail systems.
What protection features are integrated into the MIC29150-4.2BT?
The MIC29150-4.2BT integrates thermal shutdown (activates at 165°C junction temperature) and foldback current limiting. During output short-circuit, current reduces progressively below 1.5A to limit power dissipation. These protections operate autonomously without external components and reset automatically once fault conditions are removed and temperature falls below hysteresis threshold.
Can the MIC29150-4.2BT be used in battery-charging applications where precise 4.2V is critical?
Yes, the MIC29150-4.2BT delivers 4.2V ±2% over -40°C to +125°C and full load range, making it suitable for biasing or reference supply in lithium-ion charging circuits. Its accuracy meets typical fuel gauge and charger IC requirements. However, it is not a charging controller itself - it serves as a precision voltage source for downstream charging management ICs that require stable 4.2V input or reference.
MIC29150-4.2BT 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):
- 26V
- Voltage - Output (Min/Fixed):
- 4.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Transient Voltage
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
MIC29150-4.2BT FAQ
1.How can I place an order for MIC29150-4.2BT through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC29150-4.2BT 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 MIC29150-4.2BT reliable?
The price and inventory of MIC29150-4.2BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC29150-4.2BT is usually 5 days.
3.What payment methods are accepted for MIC29150-4.2BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC29150-4.2BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC29150-4.2BT?
MIC29150-4.2BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC29150-4.2BT 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 MIC29150-4.2BT?
For technical support, including MIC29150-4.2BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC29150-4.2BT requirements.
6.How does Aetrix verify that MIC29150-4.2BT is sourced from the original manufacturer or authorized distributors?
All MIC29150-4.2BT 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 MIC29150-4.2BT meets industry standards.
7.What is the process for return or replacement of MIC29150-4.2BT?
All MIC29150-4.2BT units undergo pre-shipment inspection (PSI). If there is an issue with MIC29150-4.2BT, 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 MIC29150-4.2BT part is unused and in its original packaging.
Return procedure for MIC29150-4.2BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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