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Microchip Technology MIC4575-5.0WU-TR
- Part No.:
- MIC4575-5.0WU-TR
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MIC4575-5.0WU-TR.pdf
- Description:
- IC REG BUCK BST 5V 1.7A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:417
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Product details
Overview
MIC4575-5.0WU-TR from Microchip Technology is a fixed-output 5.0V, 1A synchronous step-down (buck) DC-DC regulator in a 5-lead DDPAK package, operating at 200 kHz with ±3% output voltage accuracy over 8–24V input and full load range, used in embedded power supplies for microprocessors and industrial control modules.
For engineers reviewing the MIC4575-5.0WU-TR datasheet, MIC4575-5.0WU-TR pinout, MIC4575-5.0WU-TR application, or MIC4575-5.0WU-TR equivalent, this page delivers verified electrical specs, thermal performance data, shutdown behavior, feedback tolerance, and real-world buck converter design constraints - all confirmed for the exact MIC4575-5.0WU-TR variant.
Technical Context
The MIC4575-5.0WU-TR integrates a BiCMOS NPN power switch with internal 1.23V bandgap reference and fixed-gain error amplifier, enabling variable-duty-cycle PWM control at 200 kHz (±10%). Its cycle-by-cycle current limiting and thermal shutdown protect against overload and junction overheating up to +150°C.
It requires no external compensation, supports TTL-compatible shutdown (logic low enables), and delivers 77% typical efficiency at 1A/5V output from 12V input. The fixed 5.0V version connects FB directly to VOUT, eliminating external resistors while maintaining ±3% regulation across line and load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±3% (guaranteed over 8–24V VIN, 0.1–0.5A load; ±2.5% over full 1A range) |
| Switching Frequency | 200 kHz ±10% - enables ~2× smaller inductors vs. LM2575 (52 kHz), reducing board area and cost |
| Max Output Current | 1A continuous - supported by internal 2.2A peak current limit and 2°C/W junction-to-case thermal resistance |
| Input Voltage Range | 4V to 24V - compatible with 12V/24V industrial rails and battery-backed systems |
| Shutdown Current | <200 µA - allows ultra-low-power standby in always-on applications without auxiliary LDO |
| Efficiency | 77% typical at 1A/5V output from 12V input - reduces thermal load vs. linear regulators in high-current 5V domains |
| Thermal Protection | Internal thermal shutdown at TJ ≥ +150°C - prevents permanent damage during sustained overload or poor heatsinking |
Pinout & Package
Package: 5-lead DDPAK (TO-263), surface-mount, thermally enhanced with exposed tab (Pin 3/TAB = GND). Compatible with standard reflow profiles and offers 2°C/W θJC for direct heatsink attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Unregulated Input Supply | Accepts 4–24V DC; must be decoupled with ≥22µF ceramic or low-ESR electrolytic near pin |
| 2 (SW) | Power Switch Output | Drives external inductor; high di/dt node requiring short, wide PCB trace and local Schottky catch diode |
| 3 / TAB (GND) | Power and Signal Ground | Common return for switch, feedback, and shutdown; exposed tab must be soldered to large copper pour for thermal conduction |
| 4 (FB) | Feedback Input | Internally connected to 5V divider; short directly to output for fixed regulation - no external resistors needed |
| 5 (SHDN) | Enable/Shutdown Control | TTL-compatible input; ≤0.8V enables regulator, ≥2.4V disables it - pull-down resistor required if unused |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output with no external feedback components | Eliminates resistor selection errors and layout sensitivity - simplifies BOM and improves production yield |
| 200 kHz switching frequency | Enables use of 68 µH inductors (vs. 150+ µH for 52 kHz parts), cutting filter size and cost by ~50% |
| Integrated cycle-by-cycle current limit | Guarantees safe 1A operation without external sense resistors or protection ICs |
| Thermal shutdown with 100% burn-in screening | Ensures reliability in sealed enclosures or high-ambient environments without derating calculations |
| DDPAK package with low θJC (2°C/W) | Supports >1A continuous operation on 2-layer boards with minimal copper area - no external heatsink required |
Applications
| Industrial PLC Power Supply | Embedded Microprocessor Core Rail |
|---|---|
Use Scenario: Providing stable 5V/1A to ARM Cortex-M7-based controller in DIN-rail mounted automation module. IC Role / Device Role / Timing Role: Primary buck regulator converting 24V field bus to clean 5V core supply with tight transient response. Use Value: Delivers ±3% regulation under 0–100% load steps and survives 40V transients due to 40V absolute max VIN rating. |
Use Scenario: Generating 5V for Intel Pentium-class CPU auxiliary rail in legacy industrial PC motherboard. IC Role / Device Role / Timing Role: Step-down regulator replacing LM2575 with identical pinout but higher frequency and lower component count. Use Value: Enables drop-in upgrade path with 2× smaller inductor and same PCB footprint - no layout revision needed. |
| Battery-Powered Test Equipment | Positive-to-Negative Converter |
Use Scenario: Powering 5V logic and analog circuitry in handheld multimeter using 9V alkaline or Li-ion pack. IC Role / Device Role / Timing Role: High-efficiency pre-regulator feeding low-noise LDOs for ADC reference and digital core. Use Value: 77% efficiency at 1A extends battery life vs. linear solution; <200 µA shutdown current preserves charge during sleep mode. |
Use Scenario: Generating –5V rail from +12V supply in dual-supply op-amp signal conditioning stage. IC Role / Device Role / Timing Role: Inverting buck-boost topology using MIC4575-5.0WU-TR's SW node as active switch and external inductor/diode. Use Value: Leverages existing 200 kHz oscillator and current limit - avoids dedicated inverting controller IC and saves BOM cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575HVS-5.0 | 52 kHz operation, TO-220 only, ±4% output tolerance, higher quiescent current (5.5 mA) | Requires larger inductor (150–220 µH); less suitable for space-constrained designs | Choose when legacy LM2575 compatibility is mandatory and board area is not constrained |
| MP1584EN-LF-Z | 1.5 MHz switching, SOIC-8, ±2% output tolerance, integrated high-side MOSFET, 3A capability | Needs external compensation; higher EMI risk without proper layout; supports higher current | Choose for compact 3A designs where 1.5 MHz allows tiny 4.7 µH inductors and ceramic output caps |
Compared with LM2575HVS-5.0, MIC4575-5.0WU-TR delivers tighter regulation and 4× faster switching in a surface-mount package; compared with MP1584EN-LF-Z, it offers simpler design (no compensation), proven thermal robustness, and lower EMI - ideal for industrial environments where reliability trumps miniaturization.
Availability
MIC4575-5.0WU-TR is available at Aetrix Electronics and suitable for industrial PLCs, embedded microprocessor power supplies, battery-powered test equipment, and positive-to-negative converter circuits requiring stable component supply with long-term lifecycle support.
Supply support for MIC4575-5.0WU-TR 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 a focus on industrial, automotive, and aerospace reliability standards.
The MIC4575 series was designed as a pin-compatible, higher-frequency upgrade to the LM2575 for industrial power conversion - emphasizing ease of use, thermal resilience, and minimal external component count in harsh environments.
FAQ
What is the maximum input voltage rating for the MIC4575-5.0WU-TR?
The MIC4575-5.0WU-TR has an absolute maximum input voltage rating of +40V, but its guaranteed operating range is +4V to +24V. Operation above +24V is not recommended - the datasheet explicitly states the device is not guaranteed to survive a short-circuit to ground at input voltages exceeding 24V. For reliable long-term use, keep VIN ≤ 24V.
Does the MIC4575-5.0WU-TR require external feedback resistors?
No, the MIC4575-5.0WU-TR does not require external feedback resistors. As a fixed 5.0V output variant, it contains an internal resistive divider connected to the FB pin. The FB pin must be connected directly to the output voltage node - no external components are needed for regulation, simplifying layout and improving accuracy.
What package type and thermal characteristics does the MIC4575-5.0WU-TR use?
The MIC4575-5.0WU-TR uses a 5-lead DDPAK (TO-263) package with an exposed thermal pad (Pin 3/TAB = GND). It features a junction-to-case thermal resistance (θJC) of 2°C/W, enabling efficient heat transfer to a PCB copper pour or external heatsink - critical for sustaining 1A continuous output without derating.
How does the shutdown function work on the MIC4575-5.0WU-TR?
The SHDN pin on the MIC4575-5.0WU-TR is TTL-compatible: a logic low (≤0.8V) enables regulation, while a logic high (≥2.4V) places the device in shutdown mode, reducing quiescent current to <200 µA. If unused, SHDN must be pulled low via a resistor - leaving it floating may cause erratic enable behavior.
Can the MIC4575-5.0WU-TR be used in inverting buck-boost configurations?
Yes, the MIC4575-5.0WU-TR can be configured as a positive-to-negative converter (inverting buck-boost) per Figure 4-8 in the datasheet. Its SW pin drives an external inductor and diode network to generate a regulated –5V rail from a +8V to +18V input, making it suitable for dual-supply op-amp stages without requiring a dedicated inverting controller IC.
MIC4575-5.0WU-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- TO-263-5
MIC4575-5.0WU-TR FAQ
1.How can I place an order for MIC4575-5.0WU-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4575-5.0WU-TR 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 MIC4575-5.0WU-TR reliable?
The price and inventory of MIC4575-5.0WU-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4575-5.0WU-TR is usually 5 days.
3.What payment methods are accepted for MIC4575-5.0WU-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4575-5.0WU-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4575-5.0WU-TR?
MIC4575-5.0WU-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4575-5.0WU-TR 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 MIC4575-5.0WU-TR?
For technical support, including MIC4575-5.0WU-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4575-5.0WU-TR requirements.
6.How does Aetrix verify that MIC4575-5.0WU-TR is sourced from the original manufacturer or authorized distributors?
All MIC4575-5.0WU-TR 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 MIC4575-5.0WU-TR meets industry standards.
7.What is the process for return or replacement of MIC4575-5.0WU-TR?
All MIC4575-5.0WU-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC4575-5.0WU-TR, 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 MIC4575-5.0WU-TR part is unused and in its original packaging.
Return procedure for MIC4575-5.0WU-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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