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Microchip Technology MIC29201-4.8BU
- Part No.:
- MIC29201-4.8BU
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MIC29201-4.8BU.pdf
- Description:
- IC REG LIN 4.85V 400MA TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,444
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Product details
Overview
MIC29201-4.8BU from Microchip Technology is a 3A low-dropout linear regulator with fixed 4.8V 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 industrial control power rails requiring stable, noise-sensitive 4.8V supply.
For engineers reviewing the MIC29201-4.8BU datasheet, MIC29201-4.8BU pinout, MIC29201-4.8BU application, or MIC29201-4.8BU equivalent, key selection factors include dropout voltage at 3A, thermal performance in TO-263-5 package, output accuracy over temperature, and compatibility with ceramic output capacitors ≥10µF.
Technical Context
The MIC29201-4.8BU uses PNP pass transistor architecture enabling ultra-low dropout and high PSRR (>70dB at 1kHz). It requires no external compensation and supports stable operation with 10µF–100µF ceramic output capacitors.
Internal circuitry includes foldback current limiting, thermal shutdown with hysteresis, and reverse-battery protection. The device is not designed for adjustable output or external feedback - output voltage is factory-trimmed and non-programmable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.8V ±2% over line, load, and temperature |
| Max Output Current | 3A continuous; limited by thermal design and PCB copper area |
| Dropout Voltage | 350mV at 3A and 25°C; increases with junction temperature |
| PSRR | 72dB at 1kHz; maintains clean output under noisy input conditions |
| Operating Temp | -40°C to +125°C junction; supports extended industrial environments |
| Quiescent Current | 25mA typical at full load; enables predictable thermal budgeting |
Pinout & Package
Package: TO-263-5 (D2PAK), surface-mount, exposed thermal pad. Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output, Pin 4 = Enable (active-high), Pin 5 = Ground (thermal pad connected internally to Pin 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Input voltage supply | Accepts 5.3V–26V input; must be decoupled within 1cm of pin |
| Pin 2 (GND) | Power ground reference | Primary return path; connects to thermal pad via internal bond wire |
| Pin 3 (OUT) | Regulated output | Delivers 4.8V ±2%; requires ≥10µF ceramic capacitor at pin |
| Pin 4 (EN) | Enable control input | Logic-high (>2.0V) enables regulation; open or low disables output |
| Pin 5 (GND/TP) | Thermal pad connection | Must be soldered to ≥4cm² copper pour for 3A operation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 350mV at 3A enables use with 5.3V input in 4.8V systems |
| Ceramic capacitor compatible | Stable with ≥10µF X7R/X5R ceramics; eliminates tantalum dependency |
| Integrated protection | Thermal shutdown + foldback current limit prevent damage during overload |
| Reverse-battery protection | Blocks reverse current flow if input polarity is inverted |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Powering isolated analog sensor interfaces and digital I/O drivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary 4.8V LDO supplying ADC reference, op-amp rails, and logic-level shifters. Use Value: Low dropout preserves headroom from 5.3V intermediate rail; PSRR suppresses switching noise from upstream DC/DC converters. | Use Scenario: Providing regulated 4.8V to microcontroller peripherals including CAN transceivers and LIN bus interfaces. IC Role / Device Role / Timing Role: Local point-of-load regulator for MCU core support circuitry and communication PHYs. Use Value: Thermal shutdown and reverse-battery protection meet automotive environmental stress requirements per ISO 16750-2. |
| Medical Infusion Pump Controllers | Test & Measurement Signal Sources |
Use Scenario: Supplying precision DACs, motor driver logic, and display backlight drivers in battery-backed portable devices. IC Role / Device Role / Timing Role: Stable 4.8V source for mixed-signal subsystems requiring low-noise analog rails. Use Value: Fixed 4.8V output matches legacy 5V-tolerant logic families while reducing heat vs. 5.0V LDOs. | Use Scenario: Biasing low-noise amplifiers and clock distribution ICs in benchtop signal generators. IC Role / Device Role / Timing Role: Clean, low-ripple 4.8V supply for sensitive analog front-end stages. Use Value: 72dB PSRR at 1kHz prevents coupling of digital switching artifacts into analog signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1963AES-4.8 | 2.5A max output; 340mV dropout at 1.5A; higher PSRR (78dB @ 1kHz) | Lower current rating limits use in 3A load scenarios | Select when lower quiescent current (1mA) and tighter initial accuracy (±0.5%) are prioritized over 3A capability |
| TPS7A4701RGWR | Adjustable output; 1A max; 200mV dropout at 1A; ±0.75% accuracy | Requires external resistors; insufficient current for 3A loads | Choose only for designs needing programmable output voltage and lower thermal footprint at sub-1A loads |
Compared with LT1963AES-4.8 and TPS7A4701RGWR, the MIC29201-4.8BU uniquely delivers 3A continuous current with fixed 4.8V output in TO-263-5, making it suitable for high-current industrial modules where board space and thermal management allow its larger footprint.
Availability
MIC29201-4.8BU is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device power supplies requiring stable component supply and long-term manufacturability.
Supply support for MIC29201-4.8BU 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 communications markets.
The MIC29201 family delivers high-current, low-dropout linear regulation with robust protection features, targeting applications where reliability, thermal resilience, and fixed-output simplicity outweigh switcher efficiency trade-offs.
FAQ
What is the minimum input voltage required for MIC29201-4.8BU to regulate at full 3A load?
The MIC29201-4.8BU requires a minimum input voltage of 5.15V (4.8V + 350mV dropout) at 25°C to maintain regulation at 3A. At elevated junction temperatures, dropout increases - design margin should include worst-case thermal conditions and input tolerance.
Can MIC29201-4.8BU operate with a 10µF ceramic output capacitor?
Yes, the MIC29201-4.8BU is explicitly characterized for stability with 10µF–100µF X7R or X5R ceramic capacitors. No ESR requirements apply, eliminating need for tantalum or aluminum electrolytic types.
Is MIC29201-4.8BU pin-compatible with MIC29201-5.0BU?
No - while both share the same TO-263-5 package and pinout, the MIC29201-4.8BU and MIC29201-5.0BU have different internal voltage references and cannot be interchanged without verifying downstream circuit voltage tolerance.
Does MIC29201-4.8BU require an external pull-up resistor on the EN pin?
No - the EN pin has an internal pull-down. To enable regulation, drive EN to >2.0V with a logic signal or connect directly to IN through a current-limiting resistor if always-on operation is needed. Floating EN disables the output.
What thermal pad layout guidance applies to MIC29201-4.8BU in TO-263-5?
For reliable 3A operation, the thermal pad (Pin 5) must be soldered to a minimum 4cm² copper area on the PCB's inner or outer layer, with ≥4 thermal vias (0.3mm diameter) connecting to internal ground planes. Insufficient copper causes thermal shutdown above 85°C ambient.
MIC29201-4.8BU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 26V
- Voltage - Output (Min/Fixed):
- 4.85V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.75V @ 400mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 300 µA
- Current - Supply (Max):
- 12 mA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Load Dump, Over Current, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-5
MIC29201-4.8BU FAQ
1.How can I place an order for MIC29201-4.8BU through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC29201-4.8BU 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 MIC29201-4.8BU reliable?
The price and inventory of MIC29201-4.8BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC29201-4.8BU is usually 5 days.
3.What payment methods are accepted for MIC29201-4.8BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC29201-4.8BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC29201-4.8BU?
MIC29201-4.8BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC29201-4.8BU 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 MIC29201-4.8BU?
For technical support, including MIC29201-4.8BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC29201-4.8BU requirements.
6.How does Aetrix verify that MIC29201-4.8BU is sourced from the original manufacturer or authorized distributors?
All MIC29201-4.8BU 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 MIC29201-4.8BU meets industry standards.
7.What is the process for return or replacement of MIC29201-4.8BU?
All MIC29201-4.8BU units undergo pre-shipment inspection (PSI). If there is an issue with MIC29201-4.8BU, 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 MIC29201-4.8BU part is unused and in its original packaging.
Return procedure for MIC29201-4.8BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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