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Microchip Technology MIC4575-5.0WU
- Part No.:
- MIC4575-5.0WU
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MIC4575-5.0WU.pdf
- Description:
- IC REG BUCK BST 5V 1.7A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,983
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Product details
Overview
MIC4575-5.0WU from Microchip Technology is a fixed-output 5.0V, 1A synchronous step-down (buck) DC-DC regulator with 200 kHz switching frequency, ±3% output voltage accuracy over line and load, 4V–24V input range, and integrated thermal shutdown and cycle-by-cycle current limiting - deployed in industrial power supplies and embedded microprocessor pre-regulation.
For engineers reviewing the MIC4575-5.0WU datasheet, MIC4575-5.0WU pinout, MIC4575-5.0WU application, or MIC4575-5.0WU equivalent, key selection criteria include guaranteed 1A switch current, DDPAK-5 package thermal performance (θJC = 2°C/W), fixed 5.0V output tolerance, shutdown quiescent current <200 µA, and compatibility with standard off-the-shelf inductors and Schottky diodes.
Technical Context
The MIC4575-5.0WU implements a BiCMOS buck topology with internal NPN power switch, 1.23V bandgap reference, and fixed-frequency PWM control. Its 200 kHz oscillator (±10% tolerance) enables smaller external magnetics than legacy 52 kHz regulators like the LM2575.
Feedback is internally tied to output for fixed 5.0V operation; regulation relies on error amplifier comparison against the 1.23V reference and duty-cycle modulation of the 1A switch. Protection includes thermal shutdown and peak-current limiting at 1.7–3.0 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±3% over 8V–24V input and 0.1A–0.5A load - ensures stable logic rail for microcontrollers and FPGAs. |
| Switch Current | Guaranteed 1A continuous - supports single-rail 5V/1A loads without external current boosting. |
| Input Range | 4V to 24V - accommodates wide-input industrial and automotive battery-derived supplies. |
| Switching Frequency | 200 kHz ±10% - allows ~2× reduction in inductor size vs. 52 kHz alternatives while maintaining EMI manageability. |
| Efficiency | 77% typical at 1A, 5V output - reduces thermal load in enclosed industrial enclosures. |
| Shutdown Current | <200 µA - enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Thermal Resistance | θJC = 2°C/W - enables high-power dissipation via PCB copper pour under exposed tab (Pin 3/TAB = GND). |
Pinout & Package
Package: 5-Lead DDPAK (U), thermally enhanced surface-mount package with exposed GND tab (Pin 3/TAB). Designed for high-current, high-thermal-load applications requiring minimal heatsink area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Unregulated input supply | Accepts 4V–24V; must be decoupled near pin with ≥22 µF low-ESR capacitor to sustain 1A switching transients. |
| 2 - SW | Switch node output | Drives external inductor; high dv/dt node requiring tight layout and Kelvin connection to minimize ringing. |
| 3, TAB - GND | Power and signal ground reference | Exposed metal tab is electrically connected to GND; must be soldered to ≥1 cm² internal/external copper for thermal conduction. |
| 4 - FB | Output voltage feedback | Internally connected to 5.0V divider; shorted directly to VOUT - no external resistors required for fixed operation. |
| 5 - SHDN | Logic-level enable/disable control | TTL-compatible: ≤0.8V = ON, ≥2.4V = OFF; draws ≤30 µA when active, ≤200 µA in shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output with ±3% tolerance | Eliminates external feedback resistor network - reduces BOM count and layout sensitivity in cost-sensitive designs. |
| 200 kHz fixed-frequency operation | Enables use of compact 68 µH inductors (vs. 150+ µH for 52 kHz), lowering solution footprint by up to 40%. |
| Integrated cycle-by-cycle current limit | Protects against short-circuit and overload without external sensing - sustains reliability during transient faults. |
| Thermal shutdown with 100% burn-in test | Prevents catastrophic failure under sustained overload; validated per JEDEC JESD22-A104 for industrial temperature range. |
| DDPAK-5 package with low θJC | Delivers 2°C/W junction-to-case thermal resistance - supports 1A continuous operation with minimal PCB copper area. |
Applications
| Industrial Power Supply | Microprocessor Pre-Regulator |
|---|---|
Use Scenario: On-board 24V-to-5V conversion for PLC I/O modules operating in ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, regulated 5V to digital logic and communication interfaces. Use Value: High efficiency (77%) and thermal robustness (θJC = 2°C/W) prevent derating in confined enclosures. |
Use Scenario: Generating 5V intermediate rail for Intel Pentium-class CPUs before final LDO regulation. IC Role / Device Role / Timing Role: High-current pre-regulator reducing dropout and heat in downstream linear regulators. Use Value: 1A capability and 200 kHz switching allow small, low-profile magnetics compatible with dense CPU board layouts. |
| Battery-Powered Instrumentation | Negative Output Converter |
Use Scenario: Portable test equipment powered by 9–18V Li-ion packs requiring low-quiescent 5V rail for MCU and ADC. IC Role / Device Role / Timing Role: Main DC-DC converter enabling extended battery life via efficient step-down and ultra-low shutdown current. Use Value: <200 µA shutdown current preserves battery charge during standby; 4V minimum input supports deep discharge recovery. |
Use Scenario: Generating –5V rail from +12V supply in analog front-end circuits for op-amp biasing. IC Role / Device Role / Timing Role: Inverting buck-boost configured as negative output converter using standard external components. Use Value: Pinout and control architecture support proven inverting topologies without redesign - verified in Figure 4-8 of DS20006464A. |
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 only, ±4% output tolerance, higher quiescent current (5 mA) | Requires larger inductor (≥150 µH); less suitable for space-constrained PCBs | Select when legacy design reuse or extreme cost sensitivity outweighs size/efficiency gains. |
| MCP1703T-5002E/MB | LDO (not switching), 250 mA max, 6 µA quiescent, no inductor/diode needed | Cannot support 1A loads; limited to low-power, low-noise applications | Select only for sub-250 mA, ultra-low-noise 5V rails where efficiency is secondary to ripple performance. |
Compared with LM2575HVS-5.0 and MCP1703T-5002E/MB, the MIC4575-5.0WU uniquely delivers 1A buck conversion in a thermally optimized DDPAK package at 200 kHz - balancing high current, compact magnetics, and industrial-grade reliability without compromising on regulation accuracy or protection features.
Availability
MIC4575-5.0WU is available at Aetrix Electronics and suitable for industrial power supplies, microprocessor pre-regulation, battery-powered instrumentation, and negative-output converter designs requiring stable component supply and long-term manufacturability.
Supply support for MIC4575-5.0WU 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 global 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 drop-in upgrade to the LM2575 for engineers needing higher efficiency, smaller magnetics, and improved thermal performance in fixed-output buck applications - targeting industrial control, embedded computing, and instrumentation markets.
FAQ
What is the maximum input voltage rating for the MIC4575-5.0WU?
The MIC4575-5.0WU has an absolute maximum input voltage rating of +40V, but its recommended operating input range is +4V to +24V. Operation above +24V is not guaranteed and may compromise reliability - especially under short-circuit conditions, as noted in the Absolute Maximum Ratings table of DS20006464A.
Does the MIC4575-5.0WU require external feedback resistors?
No. The MIC4575-5.0WU is a fixed 5.0V output variant with internal feedback divider; the FB pin is internally connected to the output, so no external resistors are needed. This simplifies layout and improves regulation stability compared to adjustable versions like MIC4575YU.
What thermal performance can be expected from the MIC4575-5.0WU in DDPAK package?
The MIC4575-5.0WU in DDPAK (U) package has θJC = 2°C/W and θJA = 65°C/W. With proper PCB copper pour under the exposed GND tab, it sustains 1A continuous output at +85°C ambient - validated across the industrial temperature range (–40°C to +85°C) per DS20006464A.
Can the MIC4575-5.0WU be used in inverting buck-boost configurations?
Yes. The MIC4575-5.0WU supports inverting buck-boost topologies to generate negative outputs (e.g., –5V from +12V), as demonstrated in Figure 4-8 of DS20006464A. Its robust switch and control architecture maintain regulation and protection functionality in this configuration.
How does the MIC4575-5.0WU compare to the LM2575 in terms of component count and layout?
The MIC4575-5.0WU duplicates the LM2575 pinout and function but operates at 200 kHz instead of 52 kHz - allowing ~2× smaller inductors and reduced output capacitance. It requires identical external components (inductor, diode, input/output caps) but achieves higher efficiency and lower profile without changing PCB footprint or schematic topology.
MIC4575-5.0WU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MIC4575-5.0WU through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4575-5.0WU 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 reliable?
The price and inventory of MIC4575-5.0WU 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 is usually 5 days.
3.What payment methods are accepted for MIC4575-5.0WU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4575-5.0WU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4575-5.0WU?
MIC4575-5.0WU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4575-5.0WU 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?
For technical support, including MIC4575-5.0WU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4575-5.0WU requirements.
6.How does Aetrix verify that MIC4575-5.0WU is sourced from the original manufacturer or authorized distributors?
All MIC4575-5.0WU 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 meets industry standards.
7.What is the process for return or replacement of MIC4575-5.0WU?
All MIC4575-5.0WU units undergo pre-shipment inspection (PSI). If there is an issue with MIC4575-5.0WU, 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 part is unused and in its original packaging.
Return procedure for MIC4575-5.0WU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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