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Texas Instruments LM2574HVM-5.0
- Part No.:
- LM2574HVM-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2574HVM-5.0.pdf
- Description:
- IC REG BUCK 5V 500MA 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,083
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Product details
Overview
LM2574HVM-5.0 from Texas Instruments (formerly National Semiconductor) is a monolithic 0.5A step-down (buck) switching voltage regulator with fixed 5.0V output, 60V maximum input voltage, 52 kHz fixed-frequency oscillator, ±4% output voltage tolerance over line and load, and integrated thermal shutdown and cycle-by-cycle current limiting. It delivers stable 5V power in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2574HVM-5.0 datasheet, LM2574HVM-5.0 pinout, LM2574HVM-5.0 application, or LM2574HVM-5.0 equivalent, key selection considerations include its HV-rated 60V input capability, M14B 14-pin wide surface-mount package, 77% typical efficiency at 12VIN/0.5A, ON/OFF TTL-compatible control, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2574HVM-5.0 implements a self-contained buck converter architecture with internal NPN switch, fixed-frequency PWM oscillator, and built-in compensation. Its 52 kHz switching frequency enables use of low-cost, high-inductance standard inductors while maintaining manageable EMI and PCB layout simplicity.
It operates across −40°C to +125°C junction temperature, supports external shutdown via TTL-level ON/OFF pin (1.4V logic high threshold), and features 50 µA typical standby current. Output regulation relies on internal reference and feedback comparator - no external resistor divider required for fixed 5.0V version.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over full operating range (7V–60V input, 0.1A–0.5A load) |
| Max Input Voltage | 60V - supports wide-input industrial, automotive, and telecom supply rails |
| Output Current | Guaranteed 0.5A continuous - sufficient for powering microcontrollers, sensors, and analog circuitry |
| Switching Frequency | 52 kHz ±10% - enables use of low-cost, high-value inductors (e.g., 330 µH) without ferrite core saturation |
| Efficiency | 77% typical at VIN = 12V, IOUT = 0.5A - reduces thermal load vs. linear regulators; PCB copper traces suffice as heatsink |
| Standby Current | 50 µA typical when ON/OFF pin = 5V - enables low-power system sleep modes |
| Thermal Protection | Internal thermal shutdown - prevents damage during overload or poor heatsinking |
Pinout & Package
LM2574HVM-5.0 is housed in a 14-lead wide surface-mount (WM) package per NS Package Number M14B, optimized for thermal performance with θJA = 78°C/W (4 in² copper) and 102°C/W (1 in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 7–60V DC; requires local 22 µF aluminum electrolytic bypass capacitor |
| 2 (GND) | Power Ground | Common return for input, output, and internal circuitry; must be low-impedance connection |
| 3 (OUT) | Switch Node | Drives external catch diode anode and inductor; carries pulsed 0.5A peak current |
| 4 (ON/OFF) | Shutdown Control | TTL-compatible enable pin: <1.0V = ON, >2.2V = OFF; draws ≤30 µA in shutdown |
| 5–14 (NC / Thermal Pad) | No Connect / Exposed Pad | Pins 5–14 are internally unconnected but electrically tied to exposed thermal pad - must be soldered to PCB copper for thermal conduction |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output | Eliminates external feedback resistors - simplifies BOM and layout; ensures accuracy without trimming |
| 60V input rating | Supports 48V industrial buses, automotive cold-crank transients, and unregulated AC/DC outputs |
| 52 kHz oscillator | Enables use of low-cost, high-inductance standard inductors (e.g., Pulse PE-52627) without custom magnetics |
| TTL shutdown | Allows microcontroller-controlled power sequencing with sub-100 µA system standby current |
| Integrated protection | Cycle-by-cycle current limit + thermal shutdown prevent failure under short-circuit or overheating conditions |
Applications
| Industrial Power Supply | Automotive Subsystem |
|---|---|
Use Scenario: Providing regulated 5V rail from 24V or 48V factory floor distribution bus to PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary step-down regulator converting unregulated industrial DC to clean 5V for digital logic and analog front-ends. Use Value: High efficiency (77%) minimizes heat buildup in enclosed cabinets; 60V input withstands line surges and brownouts. | Use Scenario: Generating 5V for infotainment MCU, CAN transceivers, and display backlight controllers in 12V/24V vehicle systems. IC Role / Device Role / Timing Role: Buck converter handling cold-crank (up to 60V) and load-dump transients while maintaining stable 5V output. Use Value: Built-in thermal and current protection ensures reliability in high-temperature engine bay environments. |
| On-Card DC-DC Conversion | Positive-to-Negative Converter |
Use Scenario: Local 5V generation on dense PCBs where space precludes external switching modules. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator requiring only four external components (inductor, diode, two capacitors). Use Value: M14B surface-mount package and minimal component count reduce board area and assembly cost. | Use Scenario: Deriving −5V rail from existing +5V or +12V supply for op-amp biasing or RS-232 interface ICs. IC Role / Device Role / Timing Role: Configured in inverting buck-boost topology using same external components as buck mode. Use Value: Leverages identical IC and inductor - no redesign needed; achieves regulated negative output with proven stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576HVS-5.0 | Higher 3A output current; 52 kHz frequency; requires larger inductor; higher quiescent current (10 mA vs. 5 mA) | Better suited for higher-current loads (>0.5A); less optimal for space-constrained or ultra-low-quiescent designs | Select LM2576HVS-5.0 only if ≥2A output or improved transient response is required; otherwise LM2574HVM-5.0 offers better size/cost trade-off |
| TPS54202DR | 2A synchronous buck; 4.5–28V input; 500 kHz switching; integrated high-side/low-side FETs; requires external compensation | Enables smaller magnetics and lower output ripple but demands more complex layout and design validation | Choose TPS54202DR for compact, high-efficiency designs needing >0.5A; retain LM2574HVM-5.0 for proven, low-risk, low-component-count 0.5A solutions |
Compared with LM2576HVS-5.0 and TPS54202DR, LM2574HVM-5.0 provides the optimal balance of simplicity, ruggedness, and cost for fixed 5V/0.5A applications - requiring only four passive components, tolerating up to 60V input, and delivering field-proven reliability in industrial and automotive settings without design complexity.
Availability
LM2574HVM-5.0 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and embedded power supply designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LM2574HVM-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 acquired National Semiconductor in 2011 and maintains full technical and supply chain support for the SIMPLE SWITCHER™ product family.
The LM2574HVM-5.0 belongs to TI's SIMPLE SWITCHER™ buck regulator portfolio, designed specifically for engineers seeking robust, easy-to-use DC-DC conversion with minimal external components and high reliability in harsh environments.
FAQ
What is the maximum input voltage rating for LM2574HVM-5.0?
The LM2574HVM-5.0 has a maximum input voltage rating of 60V, confirmed in the Absolute Maximum Ratings table and Operating Ratings section of the official datasheet. This HV designation distinguishes it from the standard LM2574 (45V max), enabling use in 48V industrial systems and automotive applications with load dump transients. The 60V rating applies across the full −40°C to +125°C junction temperature range.
Does LM2574HVM-5.0 require external feedback resistors to set the output voltage?
No, LM2574HVM-5.0 does not require external feedback resistors. As a fixed-output variant, it integrates the voltage reference and feedback network internally to deliver a precise 5.0V output. This eliminates resistor matching errors, temperature drift, and layout sensitivity - unlike the adjustable LM2574HV-ADJ version, which requires two external resistors (R1 and R2) to program VOUT.
What package type is used for LM2574HVM-5.0, and how should the thermal pad be handled?
LM2574HVM-5.0 uses the M14B 14-lead wide surface-mount (WM) package. Pins 5–14 are internally unconnected but electrically tied to the exposed thermal pad. This pad must be soldered directly to a large copper pour on the PCB to achieve the specified θJA = 78°C/W (with 4 in² copper). Failure to thermally connect the pad will result in excessive junction temperature and premature thermal shutdown.
Can LM2574HVM-5.0 be used in a buck-boost (inverting) configuration?
Yes, LM2574HVM-5.0 can be configured as a positive-to-negative buck-boost converter, as explicitly listed in the Applications section of the datasheet. In this topology, the IC drives the inductor in series with the output capacitor and catch diode to generate a regulated negative output (e.g., −5V) from a positive input. External component values remain identical to those used in standard buck operation, preserving design reuse and stability.
What is the typical efficiency of LM2574HVM-5.0 at 12V input and 0.5A load?
The typical efficiency of LM2574HVM-5.0 at VIN = 12V and IOUT = 0.5A is 77%, as measured and published in the Electrical Characteristics table for the LM2574HV-5.0 variant. This value reflects real-world performance under standard test conditions (TJ = 25°C, CIN = 22 µF, COUT = 220 µF, L = 330 µH, D1 = Schottky) and is consistent across the LM2574HVM-5.0 M14B package variant.
LM2574HVM-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-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):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM2574HVM-5.0 FAQ
1.How can I place an order for LM2574HVM-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2574HVM-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 LM2574HVM-5.0 reliable?
The price and inventory of LM2574HVM-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 LM2574HVM-5.0 is usually 5 days.
3.What payment methods are accepted for LM2574HVM-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2574HVM-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2574HVM-5.0?
LM2574HVM-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2574HVM-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 LM2574HVM-5.0?
For technical support, including LM2574HVM-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2574HVM-5.0 requirements.
6.How does Aetrix verify that LM2574HVM-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2574HVM-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 LM2574HVM-5.0 meets industry standards.
7.What is the process for return or replacement of LM2574HVM-5.0?
All LM2574HVM-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2574HVM-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 LM2574HVM-5.0 part is unused and in its original packaging.
Return procedure for LM2574HVM-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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