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Microchip Technology MIC4575-5.0BT
- Part No.:
- MIC4575-5.0BT
- Manufacturer:
- Microchip Technology
- Package:
- TO-220-5
- Datasheet:
-
MIC4575-5.0BT.pdf
- Description:
- IC REG BUCK BST 5V 1.7A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,167
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Product details
Overview
MIC4575-5.0BT from Microchip Technology is a fixed-output 5.0V, 1A step-down (buck) switching regulator with 200 kHz switching frequency, ±3% output voltage tolerance over line and load, 4V–24V input range, and thermal/overcurrent protection - used in embedded power supplies for microprocessors, industrial controllers, and battery-powered systems.
For engineers reviewing the MIC4575-5.0BT datasheet, MIC4575-5.0BT pinout, MIC4575-5.0BT application, or MIC4575-5.0BT equivalent, this page delivers verified specifications, TO-220 pin mapping, real-world buck converter use cases, and two validated alternative parts for 5V/1A DC-DC design continuity.
Technical Context
The MIC4575-5.0BT integrates a BiCMOS NPN power switch, 1.23V bandgap reference, error amplifier, and 200 kHz oscillator to deliver fixed 5.0V output via internal feedback divider. It operates across –40°C to +85°C junction temperature with cycle-by-cycle current limiting and thermal shutdown.
Its 200 kHz switching frequency enables up to 2:1 reduction in inductor size versus legacy 52 kHz regulators like LM2575, while maintaining compatibility with standard off-the-shelf inductors and capacitors - no external compensation required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±3% (guaranteed across 8V–24V input, 0.1A–0.5A load) |
| Switch Current | Guaranteed 1A continuous output current capability |
| Switching Frequency | 200 kHz ±10% - enables smaller LC filter components vs. 52 kHz alternatives |
| Input Voltage Range | 4V to 24V - supports wide-input industrial and automotive pre-regulation |
| Efficiency | 77% typical at 1A load, 5V output - reduces thermal load in compact enclosures |
| Shutdown Current | <200 µA - enables low-power standby modes in battery systems |
| Thermal Protection | Integrated thermal shutdown with 100% electrical burn-in - ensures reliability under sustained overload |
Pinout & Package
Package: 5-Lead TO-220 (T), industrial temperature range (–40°C to +85°C), tab-connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VIN | Unregulated input supply | Accepts 4V–24V DC; must be decoupled with ≥22 µF ceramic or electrolytic capacitor |
| 2: SW | Switch node output | Drives external inductor; connects to cathode of Schottky diode in buck topology |
| 3 & TAB: GND | Power and signal ground | Tab is electrically connected to Pin 3; requires large copper pour for thermal dissipation |
| 4: FB | Feedback input | Internally tied to output for fixed 5.0V version - no external resistor divider needed |
| 5: SHDN | Logic-level shutdown control | TTL-compatible; ≤1.0V disables regulator (≤200 µA quiescent), ≥2.4V enables operation |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output | Eliminates external feedback resistors - simplifies layout and improves production yield |
| 200 kHz switching | Reduces required inductor size by ~50% vs. LM2575 - saves board space and cost |
| Integrated protection | Thermal shutdown + cycle-by-cycle current limiting - prevents damage during short-circuit or overload |
| Wide input range | Operates from 4V (e.g., single Li-ion) to 24V (industrial bus) - supports multi-rail system designs |
| Low shutdown current | <200 µA enables energy-efficient sleep modes in portable and IoT applications |
Applications
| Microprocessor Power Supply | Industrial Sensor Node |
|---|---|
Use Scenario: Providing stable 5V rail to Intel Pentium-class and similar microprocessors requiring 1A peak current. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 5V from unregulated 8V–24V input bus. Use Value: Tight ±3% output tolerance ensures reliable CPU core voltage compliance without additional LDO post-regulation. |
Use Scenario: Powering 4–20 mA loop-powered sensors and analog front-ends in factory automation. IC Role / Device Role / Timing Role: Efficient pre-regulator converting 24V industrial bus to clean 5V for sensor ICs and ADCs. Use Value: 77% efficiency minimizes self-heating in sealed enclosures; thermal shutdown protects against ambient overtemperature. |
| Battery Charger Auxiliary Rail | Negative Boost Converter |
Use Scenario: Generating 5V auxiliary supply from lithium battery pack (3.0–4.2V) using boost-buck hybrid topology. IC Role / Device Role / Timing Role: Buck regulator stage in multi-stage charger architecture powering USB interface or display controller. Use Value: 4V minimum input allows direct operation from partially discharged Li-ion cells - extends usable battery life. |
Use Scenario: Generating –5V rail from positive 5V or 12V source in split-supply op-amp or data acquisition circuits. IC Role / Device Role / Timing Role: Inverting buck-boost converter (using MIC4575-5.0BT in nonstandard configuration per Fig 4-8). Use Value: Leverages same 200 kHz oscillator and switch driver - eliminates need for separate inverting controller IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575HVS-5.0 | 52 kHz switching, TO-220 package, ±4% output tolerance, higher dropout voltage | Requires larger inductor/capacitor; less efficient at light loads due to lower frequency | Preferred where legacy LM2575 footprint compatibility is mandatory and size/efficiency are secondary |
| MP1584EN-LF-Z | 1.5 MHz switching, SOIC-8 package, ±2% output tolerance, integrated high-side MOSFET | Higher frequency enables ultra-compact designs but demands careful EMI filtering and PCB layout | Chosen when board space is constrained and 1.5 MHz operation aligns with system noise budget |
Compared with LM2575HVS-5.0, MIC4575-5.0BT delivers 2× higher frequency and tighter regulation for smaller magnetics; versus MP1584EN-LF-Z, it offers proven TO-220 thermal performance and simpler external component count at the cost of switching speed.
Availability
MIC4575-5.0BT is available at Aetrix Electronics and suitable for industrial control systems, embedded microprocessor power supplies, and battery-charged portable instrumentation requiring stable component supply with long-term lifecycle support.
Supply support for MIC4575-5.0BT 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, with global manufacturing and quality certifications.
The MIC4575 series was designed as a drop-in BiCMOS upgrade to LM2575 for high-efficiency, low-component-count buck conversion in industrial, computing, and automotive subsystems.
FAQ
What is the maximum input voltage rating for MIC4575-5.0BT?
The absolute maximum input voltage for MIC4575-5.0BT is +40V, but the device is only guaranteed to operate safely up to +24V under normal conditions. Operation above 24V risks permanent damage during output short-circuit events, as explicitly noted in the Absolute Maximum Ratings table on page 3 of the DS20006464A datasheet. For reliable design, limit VIN to ≤24V.
Does MIC4575-5.0BT require external feedback resistors?
No, MIC4575-5.0BT does not require external feedback resistors. As a fixed 5.0V output variant, it contains an internal resistive divider connecting the FB pin to the output. The FB pin (Pin 4) must be directly connected to the regulated 5V output node - no external components are needed for voltage setting, simplifying layout and improving accuracy.
What package type is used for MIC4575-5.0BT?
MIC4575-5.0BT uses the 5-Lead TO-220 (T) package with the metal tab electrically connected to Pin 3 (GND). This package supports through-hole mounting and provides robust thermal dissipation (θJC = 2°C/W), making it suitable for applications requiring >1W power handling without forced airflow.
Can MIC4575-5.0BT be used in negative-output configurations?
Yes, MIC4575-5.0BT can be configured as a negative-output (inverting buck-boost) converter, as demonstrated in Figure 4-8 of the datasheet. In this mode, it generates a regulated –5V rail from a positive input (e.g., 8V–18V), using external inductors and diodes. Output polarity reversal is achieved by reconfiguring the inductor and diode connections - not by modifying the IC itself.
What is the shutdown logic level for MIC4575-5.0BT?
MIC4575-5.0BT uses active-low TTL-compatible shutdown: applying ≤1.0V to the SHDN pin (Pin 5) disables the regulator, reducing quiescent current to <200 µA; applying ≥2.4V enables normal operation. The datasheet specifies 1.4V as the maximum logic-low threshold and 2.2V as the minimum logic-high threshold under defined test conditions.
MIC4575-5.0BT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-220-5
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.7A (Switch)
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
MIC4575-5.0BT FAQ
1.How can I place an order for MIC4575-5.0BT through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4575-5.0BT 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 MIC4575-5.0BT reliable?
The price and inventory of MIC4575-5.0BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4575-5.0BT is usually 5 days.
3.What payment methods are accepted for MIC4575-5.0BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4575-5.0BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4575-5.0BT?
MIC4575-5.0BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4575-5.0BT 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 MIC4575-5.0BT?
For technical support, including MIC4575-5.0BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4575-5.0BT requirements.
6.How does Aetrix verify that MIC4575-5.0BT is sourced from the original manufacturer or authorized distributors?
All MIC4575-5.0BT 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 MIC4575-5.0BT meets industry standards.
7.What is the process for return or replacement of MIC4575-5.0BT?
All MIC4575-5.0BT units undergo pre-shipment inspection (PSI). If there is an issue with MIC4575-5.0BT, 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 MIC4575-5.0BT part is unused and in its original packaging.
Return procedure for MIC4575-5.0BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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