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Texas Instruments LM2575M-5.0
- Part No.:
- LM2575M-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2575M-5.0.pdf
- Description:
- IC REG BUCK 5V 1A 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,275
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Product details
Overview
LM2575M-5.0 from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in a 5-lead surface-mount SOIC package, delivering a fixed 5.0V ±4% output across 8V–40V input, with 52 kHz fixed-frequency operation, thermal shutdown, and cycle-by-cycle current limiting. It replaces linear regulators in mid-power DC/DC conversion for industrial power rails and embedded system supplies.
For engineers reviewing the LM2575M-5.0 datasheet, LM2575M-5.0 pinout, LM2575M-5.0 application, or LM2575M-5.0 equivalent, key selection factors include its 1A continuous output capability, 77% efficiency at 12VIN/1A, TTL-compatible shutdown control, internal frequency compensation, and compatibility with standard off-the-shelf inductors - all critical for cost-sensitive, thermally constrained buck converter designs.
Technical Context
The LM2575M-5.0 integrates a PWM controller, power switch, and protection circuitry into a single IC. Its fixed 5.0V output is achieved via internal resistor divider feedback, eliminating external programming components. The 52 kHz oscillator enables use of low-cost, high-saturation-current inductors while maintaining manageable EMI.
Operation relies on cycle-by-cycle peak current limiting (2.2 A typical), thermal shutdown at 150°C junction temperature, and 50 μA standby current during TTL-level OFF control. Input voltage range is 8V to 40V, with dropout behavior defined by minimum duty cycle (93%) and saturation voltage (0.9 V typical at 1A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±4% over 8V–40V input and 0.2A–1A load - ensures stable logic supply under wide line/load variation |
| Max Output Current | 1 A continuous - supports microcontroller cores, FPGAs, and peripheral ICs without external current boosting |
| Input Voltage Range | 8 V to 40 V - accommodates 12 V and 24 V industrial bus rails with margin for transients |
| Switching Frequency | 52 kHz fixed - enables use of low-ESR aluminum electrolytic capacitors and standard 330 µH inductors |
| Efficiency | 77% at 12 VIN, 5 VOUT, 1 A - reduces thermal load vs. linear regulators, often eliminating heatsinks |
| Standby Current | 50 µA typical with TTL shutdown - enables low-power sleep modes in battery-backed systems |
| Thermal Resistance | 100 °C/W (SOIC package, no added copper) - requires PCB copper area management for full 1A operation |
Pinout & Package
LM2575M-5.0 uses a 5-lead surface-mount SOIC package (Package Number DW0024B), with exposed pad for thermal enhancement. Pin 1 is marked with dot; pins are numbered counterclockwise from top-left corner when viewed from top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 8–40 V DC; requires local 47 µF bypass capacitor to minimize switching noise injection |
| 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 and signal ground | Common return for input cap, output cap, and feedback network; must be low-impedance single-point connection |
| 4 (FEEDBACK) | Output voltage sense (fixed 5V version) | Internally tied to 5V divider - no external resistors required; not accessible for adjustment |
| 5 (ON/OFF) | TTL-compatible enable/disable control | Logic-low (≤0.8 V) disables regulator and reduces quiescent current to 50 µA; logic-high (≥2.2 V) enables operation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power switch | Internal N-channel MOSFET with 0.9 V saturation voltage at 1A - eliminates external switch and gate driver complexity |
| Fixed-frequency PWM | 52 kHz oscillator with ±10% tolerance - simplifies EMI filtering and allows predictable inductor sizing |
| Protection suite | Thermal shutdown + cycle-by-cycle current limit (1.7–3.2 A range) - prevents damage during overload or short-circuit faults |
| Minimal external parts | Only 4 components required: input cap, output cap, inductor, catch diode - accelerates design and reduces BOM cost |
| Standard inductor support | Optimized for 330 µH, 1.5 A rated inductors (e.g., Pulse PE-52627) - avoids custom magnetics and procurement delays |
Applications
| Industrial Power Supply | Embedded System Rail |
|---|---|
|
Use Scenario: Converting 24 V factory bus to clean 5 V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 5 V rail with line/load regulation ≤±4%. Use Value: Eliminates need for bulky linear regulators and heatsinks, reducing board space and thermal management overhead. |
Use Scenario: Generating 5 V for ARM Cortex-M microcontrollers and SPI peripherals in edge gateway devices. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter supplying core logic voltage with 77% efficiency at full load. Use Value: Enables 50 µA standby mode via TTL shutdown, extending battery life in low-duty-cycle monitoring applications. |
| Pre-regulator for LDOs | On-Card Buck Converter |
|
Use Scenario: Stepping 12 V down to 5.5 V before feeding a low-noise 5 V LDO for analog subsystems. IC Role / Device Role / Timing Role: Efficient pre-regulator reducing LDO dropout and power dissipation. Use Value: Cuts total power loss by >50% compared to direct 12 V → 5 V linear regulation at 1A. |
Use Scenario: Local 5 V generation on dense digital boards where centralized 5 V distribution causes IR drop. IC Role / Device Role / Timing Role: Compact SOIC-based point-of-load regulator minimizing voltage deviation across board. Use Value: SOIC package with thermal pad supports 1A output without heatsink when using ≥1 in² copper area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575T-5.0 | TO-220 package (θJA = 65°C/W), through-hole mounting, higher thermal mass | Better suited for prototyping or high-temperature environments where SOIC thermal limits are exceeded | Select when board-level thermal management is limited and mechanical robustness is prioritized over footprint size |
| MP1584EN-LF-Z | 38 V max input, 2 A output, 1.5 MHz switching, smaller solution size but requires external compensation | Enables higher efficiency at light loads and smaller inductors/caps, but increases design complexity | Choose for space-constrained designs needing >1 A or improved light-load efficiency; verify loop stability with external components |
Compared with LM2575T-5.0, the LM2575M-5.0 offers superior board-area efficiency and automated assembly compatibility, while MP1584EN-LF-Z delivers higher current and frequency at the cost of added external component count and tuning effort.
Availability
LM2575M-5.0 is available at Aetrix Electronics and suitable for industrial power supplies, embedded system rails, and on-card DC/DC converters requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for LM2575M-5.0 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 technologies, with decades of expertise in switching regulator design and manufacturing.
The LM2575 series was engineered as a drop-in, high-efficiency replacement for linear regulators in medium-power industrial and embedded applications - emphasizing simplicity, reliability, and minimal external component count.
FAQ
What is the maximum input voltage rating for the LM2575M-5.0?
The LM2575M-5.0 has an absolute maximum input voltage of 45 V, but its specified operating input range is 8 V to 40 V. Operation above 40 V risks exceeding electrical characteristics limits and may trigger internal protection circuits. For higher input applications, the LM2575HV-5.0 variant supports up to 60 V input.
Can the LM2575M-5.0 be used with an adjustable output configuration?
No - the LM2575M-5.0 is a fixed-output variant with internal feedback resistors set for 5.0 V. Its FEEDBACK pin (Pin 4) is not externally accessible for adjustment. To achieve variable output, use the LM2575M-ADJ part number, which provides the same SOIC package and 1.23 V reference voltage for external resistor programming.
What is the recommended inductor value for the LM2575M-5.0 in a typical 12 V to 5 V application?
For a 12 V input to 5 V output design at 1 A load, the recommended inductor is 330 µH with ≥1.5 A saturation current (e.g., Pulse Engineering PE-52627). This value balances ripple current (≈30% of IOUT), transient response, and physical size per TI's Figure 28 inductor selection guide.
Does the LM2575M-5.0 require a heatsink when delivering 1 A continuously?
In the SOIC package (DW0024B), the LM2575M-5.0 has a θJA of 100°C/W with minimal copper. At 1 A and 12 V input, power dissipation is ~1.1 W, resulting in ~110°C rise - exceeding safe junction limits. Use ≥1 in² of 2-oz copper connected to the exposed pad to reduce θJA to ~50°C/W, avoiding mandatory heatsinking.
How does the ON/OFF pin function on the LM2575M-5.0?
The ON/OFF pin (Pin 5) provides TTL-compatible enable control: applying ≤0.8 V disables the regulator and reduces quiescent current to 50 µA, while ≥2.2 V enables normal operation. The pin draws only 12 µA when enabled and 30 µA when disabled - making it suitable for microcontroller GPIO control without additional level-shifting.
LM2575M-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for LM2575M-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575M-5.0 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 reliable?
The price and inventory of LM2575M-5.0 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 is usually 5 days.
3.What payment methods are accepted for LM2575M-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575M-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575M-5.0?
LM2575M-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575M-5.0 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?
For technical support, including LM2575M-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575M-5.0 requirements.
6.How does Aetrix verify that LM2575M-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2575M-5.0 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 meets industry standards.
7.What is the process for return or replacement of LM2575M-5.0?
All LM2575M-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2575M-5.0, 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 part is unused and in its original packaging.
Return procedure for LM2575M-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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