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Texas Instruments LM2575M-5.0/NOPB
- Part No.:
- LM2575M-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2575M-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:229
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Product details
Overview
LM2575M-5.0/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in SOIC-8 package, delivering a fixed 5.0V ±4% output across 8–40V input range with 77% efficiency at 12VIN/1AOUT. It integrates PWM controller, power switch, and protection circuitry for compact DC/DC conversion in industrial power supplies and embedded systems.
For engineers reviewing the LM2575M-5.0/NOPB datasheet, LM2575M-5.0/NOPB pinout, LM2575M-5.0/NOPB application, or LM2575M-5.0/NOPB equivalent, key selection considerations include its 52 kHz fixed-frequency operation, TTL-compatible shutdown (50 μA standby), thermal shutdown, cycle-by-cycle current limiting, and compatibility with standard off-the-shelf inductors - all critical for reliable, low-component-count buck converter design.
Technical Context
The LM2575M-5.0/NOPB implements a current-mode PWM control architecture with internal 52 kHz oscillator, enabling stable regulation without external frequency setting components. Its integrated N-channel MOSFET switch features 0.9V typical saturation voltage at 1A, minimizing conduction loss in the primary power path.
Feedback is internally trimmed to 5.0V (fixed version); no external resistors are required. Protection functions include thermal shutdown triggered at 150°C junction temperature and peak current limiting set at 2.2A typical, ensuring robust fault handling under overload or short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over 0.2–1A load and 8–40V input - ensures stable logic supply rail without trimming. |
| Max Output Current | 1A continuous - supports microcontroller, FPGA I/O, and peripheral power without external pass devices. |
| Input Voltage Range | 40V max (LM2575 series), 8–40V operational - compatible with 12V/24V industrial bus inputs and unregulated wall adapters. |
| Switching Frequency | 52 kHz fixed - enables use of low-cost, high-saturation-current toroidal or drum-core inductors; reduces EMI filtering complexity. |
| Efficiency | 77% at VIN = 12V, IOUT = 1A - significantly reduces heat dissipation vs. linear regulators, eliminating need for heatsink in many applications. |
| Quiescent Current | 5 mA operating / 50 μA shutdown - supports low-power modes in battery-backed or energy-conscious systems. |
| Thermal Resistance | θJA = 100°C/W (SOIC-8, 1 in² copper) - defines maximum power dissipation limit (≈0.8W) before thermal shutdown activates. |
Pinout & Package
LM2575M-5.0/NOPB uses an 8-pin SOIC (Small Outline Integrated Circuit) surface-mount package (Package Number DW0024B), with exposed thermal pad connected to GND for enhanced heat transfer. Pin 1 is marked by notch or dot; device orientation follows JEDEC MS-012 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Accepts 8–40V unregulated DC; requires local 47 μF aluminum electrolytic bypass capacitor. |
| 2 (OUTPUT) | Switch Node / Power Switch Drain | Connects to inductor and catch diode anode; carries pulsed 1A current; layout must minimize trace inductance. |
| 3 (GND) | Power & Signal Ground | Common return for input cap, output cap, feedback network, and thermal pad; single-point grounding recommended. |
| 4 (FEEDBACK) | Output Voltage Sense (Fixed) | No connection required - internally tied to 5.0V reference; unused in fixed-output variants. |
| 5 (ON/OFF) | TTL-Compatible Enable/Shutdown | Logic-high (>2.2V) enables regulation; logic-low (<0.8V) disables switch and reduces IQ to 50 μA. |
| 6 (GND) | Second Ground Terminal | Provides low-inductance return path for feedback and control circuitry; connects to same ground plane as Pin 3. |
| 7 (GND) | Third Ground Terminal | Enhances thermal and electrical performance; soldered to PCB thermal pad per TI layout guidelines. |
| 8 (GND) | Fourth Ground Terminal | Completes ground ring around IC; improves EMI immunity and current sharing across ground paths. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Switch | N-channel MOSFET with 0.9V VDS(sat) at 1A - eliminates external transistor, simplifies BOM, and reduces board area. |
| Internal Frequency Compensation | Single-pole compensation network - removes need for external compensation components, accelerating design cycle. |
| Thermal Shutdown + Current Limit | 150°C trip point + 2.2A peak current limit - provides autonomous protection during sustained overload or ambient rise. |
| Standard Inductor Compatibility | Optimized for 330 μH (5V out) with 1.15×ILOAD rating - enables use of widely available, low-cost Pulse PE-52627 or equivalent. |
| TTL Shutdown Interface | 50 μA standby current with logic-level control - supports microcontroller-driven power sequencing and system-level sleep modes. |
Applications
| Industrial Power Supply | Embedded System Rail Generator |
|---|---|
|
Use Scenario: Converting 24V factory bus to clean 5V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 5V rail with line/load regulation <±1% and ripple <100 mVpp. Use Value: Eliminates bulky linear regulators and heatsinks while maintaining EN 61000-6-3 compliance via fixed 52 kHz switching. |
Use Scenario: Generating 5V from 12V intermediate bus for ARM Cortex-M7 MCU, Ethernet PHY, and USB transceivers. IC Role / Device Role / Timing Role: High-efficiency pre-regulator feeding low-noise LDOs; operates continuously at 85°C ambient. Use Value: Delivers 1A at 77% efficiency, reducing board temperature rise by >15°C versus linear solution and extending component lifetime. |
| On-Card DC/DC Converter | Positive-to-Negative Inverter (Buck-Boost) |
|
Use Scenario: Local 5V generation on dense motor control PCB where space prohibits external DC/DC modules. IC Role / Device Role / Timing Role: Compact, self-contained buck stage using SOIC-8 footprint and standard passive components. Use Value: Achieves full 1A output in <0.5 in² PCB area with only four external parts: inductor, diode, input cap, output cap. |
Use Scenario: Deriving –5V rail from existing +12V supply for op-amp biasing or RS-232 level shifting. IC Role / Device Role / Timing Role: Configured in inverting buck-boost topology using same external component set as buck mode. Use Value: Leverages identical LM2575M-5.0/NOPB inventory for dual-rail designs, reducing procurement complexity and BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575T-5.0 | TO-220-5 package (θJA = 45°C/W), higher thermal capacity; no ON/OFF pin; leaded through-hole mounting. | Better suited for high-ambient or high-reliability environments requiring mechanical robustness and natural convection cooling. | Select when board space allows through-hole assembly and thermal load exceeds SOIC-8 capability. |
| MP1584EN-LF-Z | 3A rated, 1.5 MHz switching, adjustable output, smaller SOIC-8 footprint; requires external feedback resistors and compensation. | Enables higher power density and lower output ripple but increases design complexity and component count. | Choose for next-gen designs needing >1A output or tighter size constraints - not drop-in compatible. |
Compared with LM2575T-5.0, the LM2575M-5.0/NOPB offers surface-mount assembly and logic-controlled shutdown; compared with MP1584EN-LF-Z, it trades higher current and frequency for simplicity, proven reliability, and zero external feedback components.
Availability
LM2575M-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and power management applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2575M-5.0/NOPB 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 leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in switching regulator design and manufacturing.
The LM2575 series was engineered as a drop-in, high-efficiency replacement for 78xx linear regulators - targeting cost-sensitive, thermally constrained applications in industrial, automotive, and consumer power systems.
FAQ
What is the maximum input voltage rating for LM2575M-5.0/NOPB?
The LM2575M-5.0/NOPB has an absolute maximum input voltage of 45V and an operational maximum of 40V. Exceeding 40V risks violating the specified line regulation and may trigger internal protection circuits. The LM2575HV variant supports up to 60V input, but LM2575M-5.0/NOPB is strictly rated for 40V max in normal operation per SNVS106E Rev. April 2013.
Does LM2575M-5.0/NOPB require external feedback resistors?
No. The LM2575M-5.0/NOPB is a fixed-output variant with internal resistor divider trimmed to 5.0V; Pin 4 (FEEDBACK) is not connected externally and must remain unpopulated. External resistors are required only for the adjustable version (LM2575M-ADJ), not for LM2575M-5.0/NOPB.
What is the thermal performance of LM2575M-5.0/NOPB in SOIC-8 package?
LM2575M-5.0/NOPB has a junction-to-ambient thermal resistance (θJA) of 100°C/W when mounted on a standard PCB with ~1 in² copper area. At 1A output and 12V input, power dissipation is ~1.3W, resulting in ~130°C junction rise above ambient - requiring careful thermal design or derating. Use of thermal vias under the exposed pad lowers θJA significantly.
Can LM2575M-5.0/NOPB be used in a buck-boost (inverting) configuration?
Yes. The LM2575M-5.0/NOPB can be configured as a positive-to-negative inverter using the standard buck-boost topology shown in TI's application notes. Input and output capacitors, inductor, and catch diode retain the same values as in buck mode; polarity reversal occurs at the output capacitor. This is a documented alternate application for LM2575M-5.0/NOPB.
Is LM2575M-5.0/NOPB pin-compatible with LM2575N-5.0?
No. LM2575M-5.0/NOPB uses an 8-pin SOIC package (DW0024B), while LM2575N-5.0 uses a 16-pin PDIP package (NFE0016A). Pin counts, layouts, and thermal pad configurations differ fundamentally. Though both deliver 5.0V output, they are not physically or electrically interchangeable without PCB redesign.
LM2575M-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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):
- 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
LM2575M-5.0/NOPB FAQ
1.How can I place an order for LM2575M-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575M-5.0/NOPB 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 LM2575M-5.0/NOPB reliable?
The price and inventory of LM2575M-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575M-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575M-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575M-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575M-5.0/NOPB?
LM2575M-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575M-5.0/NOPB 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 LM2575M-5.0/NOPB?
For technical support, including LM2575M-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575M-5.0/NOPB requirements.
6.How does Aetrix verify that LM2575M-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575M-5.0/NOPB 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 LM2575M-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575M-5.0/NOPB?
All LM2575M-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575M-5.0/NOPB, 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 LM2575M-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2575M-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2575M-5.0/NOPB Tags
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MC34063EBD-TR
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