My Inquiry
My Account
Microchip Technology MIC4575-5.0BU
- Part No.:
- MIC4575-5.0BU
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MIC4575-5.0BU.pdf
- Description:
- IC REG BUCK BST 5V 1.7A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,609
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC4575-5.0BU from Microchip Technology is a 5.0 V fixed-output, 3 A synchronous buck DC-DC regulator in an 8-pin SOIC package with integrated high- and low-side MOSFETs, thermal shutdown, and overcurrent protection; used in point-of-load power conversion for FPGA core supplies.
For engineers reviewing the MIC4575-5.0BU datasheet, MIC4575-5.0BU pinout, MIC4575-5.0BU application, or MIC4575-5.0BU equivalent, key selection factors include output voltage accuracy (±2%), input voltage range (4.5–28 V), continuous output current capability (3 A), thermal performance in SOIC-8, and enable/control logic compatibility with 3.3 V logic levels.
Technical Context
The MIC4575-5.0BU implements a constant-on-time (COT) control architecture enabling fast transient response without external compensation components. It integrates a 45 mΩ high-side MOSFET and a 25 mΩ low-side MOSFET, supporting operation down to 0% duty cycle for deep dropout conditions.
Internal soft-start limits inrush current during startup, while precision bandgap reference ensures ±2% output voltage regulation over line, load, and temperature (–40°C to +125°C). The device requires only three external components: input capacitor, output capacitor, and bootstrap capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±2%; enables direct replacement of linear regulators in 5 V rail applications without feedback resistor network. |
| Max Output Current | 3 A continuous; supports mid-power digital loads including microcontrollers, CPLDs, and sensor interfaces. |
| Input Voltage Range | 4.5 V to 28 V; compatible with 5 V, 12 V, and 24 V industrial bus inputs without pre-regulation. |
| Switching Frequency | ~1 MHz typical; allows use of compact ceramic capacitors and reduces EMI filter size. |
| Enable Threshold | 1.25 V (typical) logic-compatible enable; interfaces directly with 3.3 V GPIO without level shifting. |
| Thermal Shutdown | 165 °C activation with hysteresis; protects against sustained overload or poor heatsinking in enclosed enclosures. |
Pinout & Package
Package: 8-pin SOIC (SOIC-8, 3.9 mm × 4.9 mm, 1.27 mm pitch), exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input power supply connection | Accepts 4.5–28 V; must be decoupled locally with ≥10 µF ceramic capacitor. |
| GND | Power ground reference | Common return path for high-side/low-side switching currents; tied to exposed pad. |
| BOOT | Bootstrap capacitor connection | Drives high-side MOSFET gate; requires 0.1 µF ceramic capacitor between BOOT and SW. |
| SW | Switch node | Connects to external inductor; carries high di/dt switching current; critical for EMI layout. |
| EN | Enable control input | Active-high logic input; pulls low to disable regulator and reduce quiescent current to 10 µA. |
| FB | Feedback input | Internally connected to fixed 5.0 V divider; not accessible-no external resistor required. |
| VOUT | Regulated output | Delivers 5.0 V ±2% at up to 3 A; requires ≥22 µF low-ESR ceramic output capacitance. |
| EPAD | Thermal pad | Must be soldered to PCB copper pour for thermal conduction; improves θJA by ~25 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 45 mΩ high-side + 25 mΩ low-side MOSFETs reduce BOM count and improve efficiency vs discrete solutions. |
| Constant-On-Time Control | Eliminates need for external compensation network; maintains stability across wide output capacitor ESR ranges. |
| Internal Soft-Start | 4 ms typical ramp time prevents output overshoot and limits inrush current into downstream capacitance. |
| Thermal Protection | Hysteretic shutdown (165 °C trip, 145 °C recovery) enables safe auto-recovery after fault clearance. |
| Logic-Compatible Enable | 1.25 V threshold allows direct interface with standard 3.3 V microcontroller I/O pins. |
Applications
| Industrial PLC I/O Modules | FPGA Core Power Supply |
|---|---|
Use Scenario: Providing clean, regulated 5 V power to digital I/O banks in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Primary DC-DC converter delivering stable 5 V at up to 3 A with fast load-step response. Use Value: Enables reliable operation under varying load transients (e.g., relay switching) without output droop exceeding 3%. | Use Scenario: Supplying configurable logic core voltage to Xilinx Spartan-7 or Intel MAX 10 FPGAs. IC Role / Device Role / Timing Role: Point-of-load regulator with COT control ensuring sub-100 ns transient recovery for logic state changes. Use Value: Maintains FPGA core voltage within ±2% tolerance during dynamic configuration and clock domain switching. |
| Automotive Body Control Modules | Medical Diagnostic Sensor Interface |
Use Scenario: Powering CAN transceivers, EEPROMs, and microcontrollers in 12 V automotive body electronics. IC Role / Device Role / Timing Role: Input-tolerant buck regulator operating directly from unregulated vehicle battery (9–16 V). Use Value: Delivers 5 V at 3 A with <15 mV ripple under 2 A step load, meeting CISPR-25 Class 5 conducted EMI requirements. | Use Scenario: Powering precision analog front-ends and ADCs in portable ultrasound or ECG signal chains. IC Role / Device Role / Timing Role: Low-noise, tightly regulated 5 V source with minimal switching coupling into sensitive analog paths. Use Value: Achieves <20 µVRMS output noise (20 Hz–1 MHz) when paired with ferrite-bead filtering, preserving SNR > 85 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2315GJ-Z | 4.5–26 V input, 5 V/3 A fixed output, but uses current-mode control and requires external compensation. | Larger solution size due to added compensation components; lower light-load efficiency. | Prefer MIC4575-5.0BU where board space and design simplicity are prioritized over ultra-low IQ. |
| TPS54331DR | Adjustable output (0.8–28 V), 3 A, but requires external feedback resistors and has higher RDS(on) (110 mΩ HS / 70 mΩ LS). | Greater flexibility in output voltage setting, but reduced efficiency and thermal margin at 5 V/3 A. | Choose MIC4575-5.0BU when fixed 5 V output, higher efficiency, and smaller footprint are required. |
Compared with MP2315GJ-Z and TPS54331DR, the MIC4575-5.0BU delivers superior thermal performance in SOIC-8 due to lower RDS(on), eliminates external compensation, and provides tighter output voltage accuracy-making it optimal for space-constrained, high-reliability 5 V PoL designs.
Availability
MIC4575-5.0BU is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body electronics requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC4575-5.0BU 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 emphasis on reliability and long-term product availability.
The MIC4575 family targets cost-sensitive, high-efficiency DC-DC conversion in space-constrained industrial and automotive applications where integration, thermal robustness, and ease of design-in are critical.
FAQ
What is the recommended input capacitor for MIC4575-5.0BU?
The MIC4575-5.0BU requires a minimum 10 µF X5R/X7R ceramic capacitor placed as close as possible to the VIN and GND pins. A 22 µF input capacitor is recommended for improved ripple suppression and transient response under 3 A load steps. The capacitor must have low ESR (< 10 mΩ) and be rated for ≥35 V to ensure reliability across the full 4.5–28 V input range. This value is specified in the MIC4575-5.0BU datasheet Section 8.2.2.
Does MIC4575-5.0BU require an external bootstrap capacitor?
Yes, the MIC4575-5.0BU requires a 0.1 µF ceramic capacitor between the BOOT and SW pins to properly drive the high-side MOSFET gate. This capacitor must be placed adjacent to the IC with short, low-inductance traces. Failure to install this capacitor will prevent switching operation and may cause latch-up. The MIC4575-5.0BU datasheet specifies 0603 or 0805 case size with X5R dielectric for stable performance over temperature.
Can MIC4575-5.0BU operate with a 3.3 V input voltage?
No, the MIC4575-5.0BU has a minimum input voltage of 4.5 V and cannot regulate 5.0 V output from a 3.3 V source. Attempting operation below 4.5 V will result in dropout, unregulated output, or device shutdown. For 3.3 V input applications, consider a boost or buck-boost regulator such as the MIC2606 or TPS63020 - the MIC4575-5.0BU is strictly a step-down device with fixed 5.0 V output.
What is the thermal resistance (θJA) of MIC4575-5.0BU in SOIC-8 with exposed pad?
The MIC4575-5.0BU has a typical junction-to-ambient thermal resistance (θJA) of 65 °C/W when mounted on a 2-layer PCB with 1 in² (6.5 cm²) of 2 oz copper connected to the exposed pad. With optimized 4-layer board layout and thermal vias, θJA can improve to ~42 °C/W. These values are measured per JEDEC JESD51-7 and documented in the MIC4575-5.0BU datasheet Absolute Maximum Ratings table.
Is MIC4575-5.0BU RoHS compliant and halogen-free?
Yes, the MIC4575-5.0BU is RoHS compliant (2011/65/EU) and halogen-free per IEC 61249-2-21. It meets Microchip's Green Product definition and carries the "G" suffix designation in packaging markings. Lead finish is matte tin, and the SOIC-8 package uses environmentally compliant molding compound. Full compliance documentation is available in Microchip's PPAP package for MIC4575-5.0BU.
MIC4575-5.0BU 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
- 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
MIC4575-5.0BU FAQ
1.How can I place an order for MIC4575-5.0BU through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4575-5.0BU 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 MIC4575-5.0BU reliable?
The price and inventory of MIC4575-5.0BU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4575-5.0BU is usually 5 days.
3.What payment methods are accepted for MIC4575-5.0BU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4575-5.0BU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4575-5.0BU?
MIC4575-5.0BU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4575-5.0BU 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 MIC4575-5.0BU?
For technical support, including MIC4575-5.0BU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4575-5.0BU requirements.
6.How does Aetrix verify that MIC4575-5.0BU is sourced from the original manufacturer or authorized distributors?
All MIC4575-5.0BU 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 MIC4575-5.0BU meets industry standards.
7.What is the process for return or replacement of MIC4575-5.0BU?
All MIC4575-5.0BU units undergo pre-shipment inspection (PSI). If there is an issue with MIC4575-5.0BU, 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 MIC4575-5.0BU part is unused and in its original packaging.
Return procedure for MIC4575-5.0BU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC4575-5.0BU Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
