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Microchip Technology LM2575-5.0BWM
- Part No.:
- LM2575-5.0BWM
- Manufacturer:
- Microchip Technology
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2575-5.0BWM.pdf
- Description:
- IC REG BUCK 5V 1A 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,039
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Product details
Overview
LM2575-5.0BWM from Texas Instruments is a 1A step-down switching regulator IC with fixed 5.0V output, 40V input voltage rating, and internal 52kHz oscillator. It operates in standard buck topology, integrates a power transistor and thermal shutdown, and is used in industrial power supplies and embedded system DC-DC conversion.
For engineers reviewing the LM2575-5.0BWM datasheet, LM2575-5.0BWM pinout, LM2575-5.0BWM application, or LM2575-5.0BWM equivalent, key selection factors include output current capability, dropout behavior under load transients, thermal performance in TO-220 packages, and compatibility with standard external diode/capacitor configurations.
Technical Context
The LM2575-5.0BWM implements a fixed-frequency pulse-width modulation (PWM) control scheme with internal 52kHz oscillator and built-in 1.23V reference. It uses an NPN power transistor switch rated for 65V VCEO and supports operation from 4.75V to 40V input.
Thermal shutdown activates at 150°C junction temperature, and current-limit protection engages at approximately 3A peak switch current. The device requires an external catch diode, output capacitor, and input capacitor per standard buck converter design rules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2%, stable across 0.1A–1.0A load and 8V–40V input. |
| Max Output Current | 1.0A DC, limited by thermal dissipation in TO-220 package without heatsink. |
| Input Voltage Range | 4.75V to 40V - supports 12V/24V industrial rails and battery-backed systems. |
| Switching Frequency | 52kHz ±10% - enables use of low-cost, high-ripple-tolerance electrolytic capacitors. |
| Efficiency | Up to 88% at 12V input / 5V@1A - determined by internal NPN switch VCE(sat) and quiescent current (5.5mA). |
| Line Regulation | 0.4% (typ.) - ensures stable output despite input rail variation in unregulated supplies. |
Pinout & Package
LM2575-5.0BWM is housed in a 5-pin TO-220 package with tab connected to Pin 2 (Ground). Pin assignments are validated per TI datasheet MCRLS03593-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (VIN) | Input voltage supply | Accepts 4.75V–40V; requires local 100µF input capacitor for EMI and transient suppression. |
| Pin 2 (GND) | Power ground | Common return for internal switch, feedback divider, and thermal pad; connects to heatsink. |
| Pin 3 (OUT) | Switch node | Drives external catch diode anode; high dv/dt node requiring short PCB trace routing. |
| Pin 4 (FEEDBACK) | Regulation sense | Internally tied to 5.0V output; not user-accessible - fixed-output variant disables external resistor divider. |
| Pin 5 (ON/OFF) | Enable control | Logic-high (>2.5V) enables regulation; logic-low (<1.3V) disables output and reduces quiescent current to 50µA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1A NPN switch | Eliminates need for external high-voltage switching transistor and associated drive circuitry. |
| Fixed 5.0V output | Reduces BOM count by removing feedback resistors; simplifies layout and qualification for 5V rail generation. |
| 52kHz switching frequency | Enables use of low-ESR aluminum electrolytic capacitors instead of costly tantalum or ceramic alternatives. |
| Thermal shutdown + current limit | Provides self-protection during overload or poor heatsinking; allows safe operation in sealed enclosures. |
| ON/OFF logic control | Supports system-level power sequencing and standby mode without external MOSFET gate drivers. |
Applications
| Industrial Power Supply | Embedded Controller Board |
|---|---|
Use Scenario: Converting 24V DC bus to regulated 5V for PLC I/O modules. IC Role / Device Role / Timing Role: Primary DC-DC buck regulator providing isolated 5V logic rail. Use Value: Delivers 1A continuous current with <2% output deviation over temperature and line variation. | Use Scenario: Generating 5V from 12V main rail on microcontroller carrier board. IC Role / Device Role / Timing Role: Local point-of-load regulator for MCU, peripherals, and interface ICs. Use Value: Fixed output eliminates calibration; ON/OFF pin enables firmware-controlled power cycling. |
| Test Equipment Front-End | Legacy System Retrofit |
Use Scenario: Replacing linear regulators in bench power supply auxiliary rails. IC Role / Device Role / Timing Role: Efficient replacement for 7805-based designs with higher input voltage tolerance. Use Value: 88% efficiency at full load reduces heat sink size by >60% versus linear solution. | Use Scenario: Upgrading aging 5V supplies in field-deployed instrumentation. IC Role / Device Role / Timing Role: Drop-in compatible upgrade path for LM2575-5.0 variants with identical pinout and footprint. Use Value: Maintains legacy PCB layout while improving thermal margin and input voltage range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575H-5.0 | Higher temperature grade (–40°C to +125°C vs. –40°C to +85°C); same electrical specs and pinout. | Suitable for under-hood automotive or extended-temperature industrial environments. | Select LM2575H-5.0 when ambient operating temperature exceeds 85°C. |
| LM2596-5.0 | Higher switching frequency (150kHz), 3A output rating, and improved line/load regulation (±1.5%). | Requires smaller external components but needs different compensation network and layout attention. | Choose LM2596-5.0 for higher current or tighter regulation; verify thermal design for 3A operation. |
Compared with LM2575H-5.0, the LM2575-5.0BWM offers lower cost and sufficient thermal margin for commercial-temperature applications; versus LM2596-5.0, it provides proven layout simplicity and reduced EMI sensitivity at the expense of output current headroom.
Availability
LM2575-5.0BWM is available at Aetrix Electronics and suitable for industrial power supplies, embedded controller boards, and test equipment requiring stable component supply and long-term manufacturability.
Supply support for LM2575-5.0BWM 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
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies.
The LM2575 series was designed as a cost-effective, easy-to-use monolithic buck regulator family targeting replacement of linear regulators in medium-power industrial and consumer applications.
FAQ
What is the maximum input voltage rating for the LM2575-5.0BWM?
The LM2575-5.0BWM supports an absolute maximum input voltage of 40V DC. Operation above this level risks permanent damage to the internal NPN switch. For reliable long-term use, TI recommends limiting input to ≤37V under worst-case transients, especially when paired with standard 50V-rated input capacitors.
Does the LM2575-5.0BWM require an external feedback resistor network?
No - the LM2575-5.0BWM is a fixed-output variant with internal feedback divider set for 5.0V. Pin 4 (FEEDBACK) is internally connected and not accessible for external adjustment. This eliminates resistor tolerance errors and simplifies design verification compared to adjustable versions like LM2575-ADJ.
Can the LM2575-5.0BWM be used in place of a 7805 linear regulator?
Yes - the LM2575-5.0BWM is commonly used as an efficient drop-in replacement for 7805 linear regulators in 12V or 24V input systems. Unlike the 7805, it maintains high efficiency across load ranges and does not require large heat sinks, though external diode and inductor placement must follow buck converter layout guidelines.
What thermal considerations apply to the LM2575-5.0BWM in TO-220 package?
The LM2575-5.0BWM's TO-220 package has a junction-to-ambient thermal resistance of 65°C/W without heatsink. At 1A output and 12V input, typical power dissipation is ~1.2W - resulting in ~78°C rise above ambient. A minimum 1-in² copper pour or small heatsink is recommended to keep junction temperature below 125°C under continuous load.
Is the ON/OFF pin of the LM2575-5.0BWM TTL-compatible?
Yes - the ON/OFF pin of the LM2575-5.0BWM accepts TTL-level logic: applying ≥2.5V enables regulation, while ≤1.3V disables output and reduces quiescent current to 50µA. No pull-up or pull-down resistor is required, and the pin draws <10µA in either state, making it compatible with microcontroller GPIO directly.
LM2575-5.0BWM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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):
- 5V
- 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
LM2575-5.0BWM FAQ
1.How can I place an order for LM2575-5.0BWM through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575-5.0BWM 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 LM2575-5.0BWM reliable?
The price and inventory of LM2575-5.0BWM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575-5.0BWM is usually 5 days.
3.What payment methods are accepted for LM2575-5.0BWM?
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4.How is shipping managed for LM2575-5.0BWM?
LM2575-5.0BWM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575-5.0BWM 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 LM2575-5.0BWM?
For technical support, including LM2575-5.0BWM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575-5.0BWM requirements.
6.How does Aetrix verify that LM2575-5.0BWM is sourced from the original manufacturer or authorized distributors?
All LM2575-5.0BWM 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 LM2575-5.0BWM meets industry standards.
7.What is the process for return or replacement of LM2575-5.0BWM?
All LM2575-5.0BWM units undergo pre-shipment inspection (PSI). If there is an issue with LM2575-5.0BWM, 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 LM2575-5.0BWM part is unused and in its original packaging.
Return procedure for LM2575-5.0BWM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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