My Inquiry
My Account
Microchip Technology MIC4575WU-TR
- Part No.:
- MIC4575WU-TR
- Manufacturer:
- Microchip Technology
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MIC4575WU-TR.pdf
- Description:
- IC REG BUCK BST ADJ 1.7A TO263-5
- Quantity:
- Payment:
- Shipping:
Inventory:784
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC4575WU-TR from Microchip Technology is a 1A, 200 kHz fixed-output buck switching regulator in DDPAK-5 package, delivering 5.0V ±3% over 8–24V input and 0.1–0.5A load, with thermal shutdown and cycle-by-cycle current limiting. It replaces LM2575 with higher frequency for smaller magnetics and supports battery charger, on-card DC/DC, and microprocessor pre-regulation.
For engineers reviewing the MIC4575WU-TR datasheet, MIC4575WU-TR pinout, MIC4575WU-TR application, or MIC4575WU-TR equivalent, this page provides verified electrical specs, validated pin functions, confirmed industrial-temperature operation (–40°C to +85°C), and real-world design constraints including 1.3V saturation voltage at 1A and 77% efficiency at 5V/1A output.
Technical Context
The MIC4575WU-TR integrates a BiCMOS NPN power switch, 1.23V bandgap reference, and 200 kHz oscillator with ±10% tolerance. Its error amplifier compares FB voltage against 1.23V to control duty cycle via PWM comparator, enabling fixed 5.0V regulation without external feedback resistors.
It operates across 4–24V input, delivers up to 1A continuous output, and features TTL-compatible SHDN pin (logic low enables, >2.4V disables). Protection includes thermal shutdown, overcurrent limiting (2.2A typical peak), and internal frequency compensation-requiring only VIN, SW, GND, FB, and SHDN connections.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±3% (guaranteed across 8–24V input and 0.1–0.5A load) |
| Switching Frequency | 200 kHz ±10% (enables ~2× smaller inductor vs. 52 kHz LM2575) |
| Max Output Current | 1A continuous (limited by thermal resistance θJC = 2°C/W and TJ ≤ +150°C) |
| Saturation Voltage | 1.3V max at 1A (defines minimum dropout and conduction loss) |
| Efficiency | 77% typical at 5V/1A output (measured with VIN = 12V) |
| Shutdown Current | 200 µA max (reduces system standby power when SHDN = high) |
| Feedback Accuracy | N/A - fixed version uses internal divider; no external FB resistor required |
Pinout & Package
Package: 5-Lead DDPAK (TO-263), surface-mount, thermally enhanced with exposed tab (GND-connected), rated for industrial temperature range (–40°C to +85°C) and 65°C/W junction-to-air thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Unregulated input supply | Accepts 4–24V DC; absolute max 40V; must be bypassed with ≥22µF ceramic or electrolytic capacitor |
| 2 - SW | Switch node output | Drives external inductor and Schottky diode; carries pulsed 1A peak current; requires low-inductance layout |
| 3 & Tab - GND | Power and signal ground | Common return for internal regulator, switch emitter, and thermal path; tab must be soldered to PCB copper pour |
| 4 - FB | Feedback input | Internally connected to 5.0V divider midpoint; short directly to VOUT for regulation - no external resistors needed |
| 5 - SHDN | Enable/disable control | TTL-compatible input; <1.0V enables, >2.4V disables; draws ≤30 µA when active, ≤200 µA in shutdown |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output | Eliminates external feedback resistors and associated tolerance stack-up; simplifies BOM and layout |
| 200 kHz switching | Reduces required inductor size by ~50% versus 52 kHz competitors like LM2575, easing board space constraints |
| Integrated protection | Thermal shutdown and cycle-by-cycle current limiting prevent damage during overload or short-circuit events |
| Low shutdown current | 200 µA max enables long battery life in always-on systems requiring periodic wake-up regulation |
| DDPAK-5 package | Surface-mount form with exposed thermal tab supports >1A operation without heatsink under moderate airflow |
Applications
| Microprocessor Pre-Regulator | Battery Charger Supply |
|---|---|
Use Scenario: Generating stable 5.0V rail from 9–24V adapter or automotive battery for Intel Pentium-class logic and I/O. IC Role / Device Role / Timing Role: Primary step-down regulator providing clean, regulated 5V before LDO post-regulation. Use Value: Delivers 1A at 77% efficiency with ±3% output accuracy, reducing heat and enabling compact 68 µH inductor per reference design FIGURE 4-6. |
Use Scenario: Charging Li-ion or lead-acid batteries using constant-voltage stage powered from unregulated wall adapter or solar input. IC Role / Device Role / Timing Role: Constant-voltage source regulating charge voltage to 5.0V with tight tolerance and thermal foldback. Use Value: Built-in thermal shutdown prevents overheating during prolonged charging cycles; 200 kHz operation allows small, low-profile magnetics suitable for portable chargers. |
| On-Card DC/DC Converter | Negative Boost Converter |
Use Scenario: Local 5V generation on dense PCBs where space limits use of through-hole TO-220 regulators. IC Role / Device Role / Timing Role: Surface-mount buck converter replacing linear regulators to improve power efficiency and reduce board heating. Use Value: DDPAK-5 footprint and integrated compensation eliminate need for external compensation components, accelerating layout and validation. |
Use Scenario: Generating –5V rail from positive 12V supply for op-amp biasing or RS-232 interface circuits. IC Role / Device Role / Timing Role: Inverting buck-boost topology using MIC4575WU-TR's SW node as switching terminal and GND as virtual ground. Use Value: Confirmed in DS20006464A-page 9 FIGURE 4-8; leverages same 200 kHz timing and protection features for bidirectional energy transfer. |
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/NOPB | 52 kHz operation, TO-220-5 package, 3.0A peak current limit, ±4% output tolerance | Requires larger inductor/capacitor; better suited for high-current, low-frequency designs with relaxed size constraints | Select if legacy compatibility or higher peak current headroom is prioritized over board area and efficiency |
| MCP16301T-500I/OT | 1.5A output, 1.2 MHz switching, SOT-23-6 package, ±2% output tolerance, no integrated switch | External MOSFET required; higher frequency enables ultra-small passives but increases EMI sensitivity | Choose for space-constrained designs needing >1A or tighter voltage accuracy, accepting added component count |
Compared with LM2575HVS-5.0/NOPB, MIC4575WU-TR offers 3.8× higher frequency for 50% smaller magnetics and tighter output tolerance; versus MCP16301T-500I/OT, it integrates the power switch and reduces BOM count but trades off maximum current and switching frequency flexibility.
Availability
MIC4575WU-TR is available at Aetrix Electronics and suitable for battery-powered devices, industrial control modules, and embedded computing platforms requiring stable component supply with RoHS-compliant packaging and industrial-temperature operation.
Supply support for MIC4575WU-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 reliability, longevity, and embedded system integration.
The MIC4575 series was designed as a drop-in upgrade to LM2575 for engineers needing higher efficiency, smaller passive components, and industrial-grade thermal performance in fixed-output buck conversion applications.
FAQ
What is the guaranteed output voltage tolerance for MIC4575WU-TR across line and load conditions?
The MIC4575WU-TR guarantees 5.0V output within ±3% over input voltages from 8V to 24V and load currents from 0.1A to 0.5A, as specified in DS20006464A-page 4. This tolerance is tighter than the LM2575's ±4% and applies without external trimming components due to factory-trimmed internal feedback.
Can MIC4575WU-TR operate with input voltage below 4V?
No - the MIC4575WU-TR has a minimum operating input voltage of 4V per DS20006464A-page 3. Below this, regulation fails and the internal switch may not turn on reliably. For sub-4V inputs, consider Microchip's MIC2295 or alternative low-VIN buck regulators.
Does MIC4575WU-TR require an external compensation network?
No - the MIC4575WU-TR includes internal frequency compensation, eliminating the need for external RC networks. This is confirmed in DS20006464A-page 1 and simplifies design versus controllers like the MIC2295 that require full external loop compensation.
What is the maximum allowable junction temperature for MIC4575WU-TR?
The MIC4575WU-TR has a maximum junction temperature of +150°C (DS20006464A-page 3). Operation above this risks permanent damage. Derating is required above +85°C ambient; thermal design must account for θJA = 65°C/W and θJC = 2°C/W to maintain safe TJ under 1A load.
Is MIC4575WU-TR pin-compatible with LM2575-5.0?
Yes - the MIC4575WU-TR duplicates the LM2575 pinout and function (DS20006464A-page 1), including identical VIN, SW, GND, FB, and SHDN assignments. However, its 200 kHz operation requires re-optimization of inductor and capacitor values per application notes AN14 and AN15.
MIC4575WU-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 20V
- 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
MIC4575WU-TR FAQ
1.How can I place an order for MIC4575WU-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4575WU-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 MIC4575WU-TR reliable?
The price and inventory of MIC4575WU-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4575WU-TR is usually 5 days.
3.What payment methods are accepted for MIC4575WU-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4575WU-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4575WU-TR?
MIC4575WU-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4575WU-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 MIC4575WU-TR?
For technical support, including MIC4575WU-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4575WU-TR requirements.
6.How does Aetrix verify that MIC4575WU-TR is sourced from the original manufacturer or authorized distributors?
All MIC4575WU-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 MIC4575WU-TR meets industry standards.
7.What is the process for return or replacement of MIC4575WU-TR?
All MIC4575WU-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC4575WU-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 MIC4575WU-TR part is unused and in its original packaging.
Return procedure for MIC4575WU-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC4575WU-TR 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…
