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Microchip Technology LM2575-12YWM-TR
- Part No.:
- LM2575-12YWM-TR
- Manufacturer:
- Microchip Technology
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2575-12YWM-TR.pdf
- Description:
- IC REG BUCK 12V 1A 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,841
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Product details
Overview
LM2575-12YWM-TR from Micrel is a fixed-output 12V, 1A step-down (buck) switching regulator with 52kHz internal oscillator, ±3% output voltage accuracy over line/load, and integrated thermal shutdown and cycle-by-cycle current limiting. It operates from 4V to 40V input and delivers high-efficiency regulation in industrial power supplies and embedded DC-DC conversion.
For engineers reviewing the LM2575-12YWM-TR datasheet, LM2575-12YWM-TR pinout, LM2575-12YWM-TR application, or LM2575-12YWM-TR equivalent, key selection criteria include guaranteed 1A output current, TO-220-compatible 24-pin wide SOIC (WM) package, 88% typical efficiency at 12V/1A, and ON/OFF control with <200µA standby current.
Technical Context
The LM2575-12YWM-TR integrates a 52kHz fixed-frequency oscillator, error amplifier with 1.23V bandgap reference, and 1A NPN switch with saturation voltage ≤1.4V. Its feedback loop uses an internal 1.23V reference tied directly to the FB pin for fixed 12V output - no external resistors required.
Protection architecture includes thermal shutdown triggered at 150°C junction temperature and peak current limiting set to 1.3–3.2A. The ON/OFF pin accepts TTL/CMOS logic levels (VIH ≥2.2V, VIL ≤1.0V) enabling system-level power sequencing without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±3% over 0.2–1A load and 15–40V input - eliminates need for external feedback divider. |
| Max Output Current | 1A continuous - supports single-rail microcontroller or FPGA core supply without derating. |
| Input Voltage Range | 4V to 40V - accommodates 12V/24V industrial buses and automotive battery transients. |
| Switching Frequency | 52kHz ±10% - enables use of low-cost, standard 330µH inductors with minimal EMI filtering. |
| Efficiency | 88% typical at VIN=25V, VOUT=12V, IOUT=1A - reduces thermal load vs. linear regulators. |
| Standby Current | <200µA when ON/OFF pin = 5V - enables low-power sleep modes in battery-backed systems. |
| Thermal Shutdown | Activates at TJ ≥150°C - protects device during overload or poor heatsinking conditions. |
Pinout & Package
LM2575-12YWM-TR uses a 24-pin wide SOIC (WM) package with exposed thermal pad. Pin 1 is VIN; pins 2–5 are OUT, GND, FB, and ON/OFF respectively; remaining pins are NC or internal power/ground connections per functional diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Accepts 4–40V unregulated DC; requires local 100µF input capacitor for stability. |
| 2 (OUT) | Switched Output Node | Drives external catch diode and inductor; connects to output filter capacitor. |
| 3 (GND) | Power Ground Reference | Common return for internal switch, error amp, and oscillator; must be low-impedance. |
| 4 (FB) | Feedback Input | Internally connected to 12V output divider - no external components needed for fixed version. |
| 5 (ON/OFF) | Enable Control Input | Active-high logic input; <1.0V disables regulator and reduces quiescent current to <200µA. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12V output | Guaranteed ±3% accuracy across –40°C to +125°C junction temperature - eliminates calibration effort. |
| Integrated protection | Thermal shutdown + cycle-by-cycle current limit - prevents damage during short-circuit or startup surge. |
| Low external part count | Only four external components required (inductor, diode, input/output capacitors) - accelerates design validation. |
| 52kHz fixed frequency | Enables predictable EMI filtering and compatibility with off-the-shelf 330µH inductors - simplifies BOM sourcing. |
| ON/OFF logic control | TTL/CMOS-compatible enable pin with <200µA standby current - supports system-level power management. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Regulating 24V vehicle battery to stable 12V for microcontroller and sensor rails. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated 12V domain with thermal fault resilience. Use Value: Eliminates need for heatsink due to 88% efficiency and built-in thermal shutdown - reduces board area and cost. |
Use Scenario: Converting 12V automotive battery to clean 12V for CAN transceiver and EEPROM power. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter with ON/OFF control synchronized to ignition state. Use Value: <200µA standby current extends battery life during vehicle sleep mode without external disable circuitry. |
| Embedded Network Router | Factory Automation I/O Module |
Use Scenario: Generating 12V from 48V PoE midspan for Ethernet PHY and switch fabric. IC Role / Device Role / Timing Role: High-input-voltage buck stage preceding LDOs for noise-sensitive analog sections. Use Value: 40V max input rating handles PoE transient surges; 52kHz frequency avoids interference with Ethernet signaling bands. |
Use Scenario: Powering 12V solenoid drivers and digital isolators in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Robust main supply regulator operating continuously in 60°C ambient industrial enclosures. Use Value: Guaranteed 1A output and thermal shutdown ensure reliable operation under sustained full-load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575-12WT | Same electrical specs but in 5-pin TO-220 package - higher θJA (65°C/W) vs. WM's 100°C/W. | Requires external heatsink above ~500mA in enclosed environments; less suitable for dense PCB layouts. | Select LM2575-12WT only when mechanical mounting to chassis or heatsink is preferred over surface-mount assembly. |
| LM2596-12 | Higher 150kHz switching frequency, 3A output rating, and ±2% output tolerance - different compensation and external component requirements. | Supports higher current and smaller magnetics but needs redesigned LC filter and feedback layout. | Choose LM2596-12 only when upgrading to >1A load or requiring tighter output tolerance; not drop-in compatible. |
Compared with LM2575-12WT, the LM2575-12YWM-TR offers superior thermal performance in space-constrained SMT designs; compared with LM2596-12, it provides proven 52kHz stability with legacy inductor compatibility but lower current capability.
Availability
LM2575-12YWM-TR is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and embedded networking applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2575-12YWM-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
Micrel Inc. was a U.S.-based semiconductor company specializing in power management, analog, and mixed-signal ICs before its acquisition by Microchip Technology in 2015.
The LM2575 series was designed as a high-efficiency, easy-to-use replacement for three-terminal linear regulators in medium-power DC-DC conversion - targeting cost-sensitive industrial and embedded systems.
FAQ
What is the maximum input voltage rating for LM2575-12YWM-TR?
The LM2575-12YWM-TR has an absolute maximum input voltage of 45V, with recommended operating range up to 40V. This allows safe operation across 24V industrial buses and automotive 12V systems with load-dump transients. Exceeding 40V may reduce reliability or trigger overvoltage protection in upstream circuitry, though the device itself remains functional within the 45V absolute limit specified in the datasheet.
Does LM2575-12YWM-TR require external feedback resistors?
No, the LM2575-12YWM-TR is a fixed-output variant with internal resistor divider network setting the output to 12V. The FB pin is internally connected and does not require external components - unlike adjustable versions such as LM2575-ADJ. This simplifies layout and eliminates resistor tolerance errors affecting output accuracy.
What package type is used by LM2575-12YWM-TR?
The LM2575-12YWM-TR uses a 24-pin wide SOIC (WM) package with exposed thermal pad. It measures 7.6mm × 15.4mm and is RoHS-compliant with "high-melting solder" exemption. This surface-mount package provides better thermal performance than TO-220 in PCB-constrained applications while maintaining compatibility with standard reflow processes.
How does the ON/OFF pin function on LM2575-12YWM-TR?
The ON/OFF pin (Pin 5) enables or disables the LM2575-12YWM-TR via TTL/CMOS logic levels: ≥2.2V enables regulation, ≤1.0V disables it and reduces quiescent current to <200µA. This feature supports system-level power sequencing and low-power sleep states without external MOSFET switches or level shifters.
What is the typical efficiency of LM2575-12YWM-TR at full load?
The LM2575-12YWM-TR achieves 88% typical efficiency at VIN = 25V, VOUT = 12V, and IOUT = 1A. Efficiency drops to ~75% at VIN = 12V due to reduced duty cycle and higher conduction losses. This high efficiency significantly reduces heat generation compared to linear regulators, often eliminating the need for heatsinks in well-ventilated designs.
LM2575-12YWM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
LM2575-12YWM-TR FAQ
1.How can I place an order for LM2575-12YWM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575-12YWM-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 LM2575-12YWM-TR reliable?
The price and inventory of LM2575-12YWM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575-12YWM-TR is usually 5 days.
3.What payment methods are accepted for LM2575-12YWM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575-12YWM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575-12YWM-TR?
LM2575-12YWM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575-12YWM-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 LM2575-12YWM-TR?
For technical support, including LM2575-12YWM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575-12YWM-TR requirements.
6.How does Aetrix verify that LM2575-12YWM-TR is sourced from the original manufacturer or authorized distributors?
All LM2575-12YWM-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 LM2575-12YWM-TR meets industry standards.
7.What is the process for return or replacement of LM2575-12YWM-TR?
All LM2575-12YWM-TR units undergo pre-shipment inspection (PSI). If there is an issue with LM2575-12YWM-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 LM2575-12YWM-TR part is unused and in its original packaging.
Return procedure for LM2575-12YWM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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