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Texas Instruments LM2574HVMX-15/NOPB
- Part No.:
- LM2574HVMX-15/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2574HVMX-15/NOPB.pdf
- Description:
- IC REG BUCK 15V 500MA 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,013
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Product details
Overview
LM2574HVMX-15/NOPB from Texas Instruments is a monolithic 0.5A step-down (buck) switching voltage regulator with fixed 15V output, 60V maximum input voltage, 52 kHz internal oscillator, ±4% output voltage tolerance, and thermal/current-limit protection. It replaces linear regulators in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2574HVMX-15/NOPB datasheet, LM2574HVMX-15/NOPB pinout, LM2574HVMX-15/NOPB application, or LM2574HVMX-15/NOPB equivalent, key selection considerations include input voltage range (up to 60V), guaranteed 0.5A load capability, fixed 15V output accuracy, TTL-compatible shutdown, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2574HVMX-15/NOPB integrates a PWM controller, power switch, oscillator, error amplifier, and current-limit circuit in a single IC. Its fixed-frequency 52 kHz operation enables predictable EMI filtering and simplifies inductor selection using standardized nomographs.
It operates in continuous conduction mode for stable regulation at full load and transitions to discontinuous mode at light loads. Protection features include cycle-by-cycle current limiting (1.0A typical peak limit) and thermal shutdown, ensuring robustness under fault conditions without external supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V ±4% over line/load/temperature - ensures stable rail for analog front-ends or logic interfaces without feedback resistor network. |
| Max Input Voltage | 60V - supports wide-input industrial, automotive, or telecom supply rails without pre-regulation. |
| Output Current | Guaranteed 0.5A - sufficient for powering microcontrollers, sensors, or small FPGA I/O banks directly. |
| Oscillator Frequency | 52 kHz (±10%) - enables use of low-cost, high-saturation-current inductors (e.g., 330 µH) with minimal core loss. |
| Efficiency | 88% at VIN = 18V, IOUT = 0.5A - reduces thermal stress on PCB copper traces, eliminating need for dedicated heatsinks. |
| Shutdown Current | 50 µA typical - allows low-power standby modes in battery-backed or energy-conscious systems. |
| Thermal Resistance | 78 °C/W (junction-to-ambient, M-package with 4 in² copper) - defines safe operating area under continuous 0.5A load at +125°C ambient. |
Pinout & Package
LM2574HVMX-15/NOPB is housed in a 14-lead wide-body surface-mount package (NS M14B, JEDEC MO-153), optimized for thermal performance and board-level reliability in high-voltage applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 18–60V DC; requires local 22 µF electrolytic bypass capacitor for stability. |
| 2 (GND) | Power Ground | Common return for input/output paths and control circuitry; must connect to low-impedance ground plane. |
| 3 (OUT) | Switch Node | Drives external catch diode and inductor; carries high di/dt switching current - layout critical for EMI control. |
| 4 (FB) | Feedback Input | Not connected in fixed-output version; internally tied to 15V output divider - no external resistors required. |
| 5 (ON/OFF) | Enable Control | TTL-compatible shutdown: <0.8V = ON, >2.4V = OFF; draws only 50 µA in standby. |
| 6–14 | Thermal Pad / NC | Pins 6–14 are internally connected to exposed thermal pad - must be soldered to large copper pour for heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 15V Output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity while maintaining ±4% accuracy across temperature and load. |
| High-Voltage Input Support | 60V absolute max rating enables direct connection to unregulated 48V telecom or 24V industrial bus rails without derating or external clamping. |
| Integrated Protection | Cycle-by-cycle current limiting (0.65–1.8A range) and thermal shutdown prevent damage during short-circuit or overload events without external sensing circuitry. |
| Low External Component Count | Requires only four external parts - input cap, output cap, inductor, and Schottky catch diode - accelerating design cycle and improving production yield. |
| Standard Inductor Compatibility | Optimized for widely available 330 µH inductors (e.g., Pulse PE-52627, Renco RL-1284-330), avoiding custom magnetics and supply-chain risk. |
Applications
| Industrial Power Supplies | Automotive Body Control Modules |
|---|---|
Use Scenario: Converting 24V vehicle battery or 48V telecom bus to stable 15V for analog sensor signal conditioning and ADC reference. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 15V rail with high PSRR and low noise for precision measurement circuits. Use Value: Delivers 0.5A at 88% efficiency with no heatsink needed, reducing system size and enabling compact enclosure designs. | Use Scenario: Powering microcontroller peripherals (CAN transceivers, LIN drivers, EEPROM) in body electronics modules exposed to load-dump transients. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator handling up to 60V transient surges while maintaining regulated 15V output. Use Value: Withstands ISO 7637-2 pulse 5a (75V/100ms) when combined with input TVS, eliminating need for additional surge suppression stages. |
| Test & Measurement Equipment | Programmable Logic Controllers (PLCs) |
Use Scenario: Generating clean 15V bias for op-amps, DACs, and multiplexers in portable bench instruments with battery or universal AC adapter input. IC Role / Device Role / Timing Role: Efficient pre-regulator feeding low-noise LDOs, minimizing thermal drift and enabling long battery runtime. Use Value: 52 kHz fixed frequency allows predictable EMI filtering; ±4% output tolerance meets Class II instrument calibration requirements. | Use Scenario: Providing auxiliary 15V rail for I/O expansion modules, communication interfaces (RS-485, Ethernet PHY), and real-time clock backup in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Robust, long-lifecycle DC-DC converter supporting 20+ year field deployment in harsh industrial environments. Use Value: M14B package with exposed thermal pad ensures reliable operation at +70°C ambient with full 0.5A load, meeting IEC 61000-6-2 immunity standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576HV-15 | 1A output current, 52 kHz frequency, same 60V max input, but larger SOIC-16 package and higher quiescent current (10 mA vs 5 mA). | Supports higher load currents; less suitable for space-constrained layouts due to larger footprint and thermal pad configuration. | Select when >0.5A output or improved transient response under dynamic loads is required. |
| TPS54302DDAR | 3A output, 2.5–28V input, adjustable output, 500 kHz switching, integrated MOSFETs, but requires external compensation and has lower max input voltage. | Better suited for compact, high-efficiency designs needing variable output or tighter regulation; not drop-in compatible due to different pinout and control architecture. | Choose for next-generation designs prioritizing density and efficiency over legacy compatibility and simplicity. |
Compared with LM2574HVMX-15/NOPB, LM2576HV-15 offers higher current headroom at the cost of board area and thermal management complexity, while TPS54302DDAR delivers superior power density and flexibility but demands more design effort and lacks direct pin compatibility.
Availability
LM2574HVMX-15/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control units, and programmable logic controllers requiring stable component supply with long-term lifecycle support.
Supply support for LM2574HVMX-15/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 acquired National Semiconductor in 2011 and maintains its legacy analog product lines, including the SIMPLE SWITCHER™ family, with full technical documentation and long-term manufacturing commitment.
The LM2574HVMX-15/NOPB belongs to TI's SIMPLE SWITCHER™ buck regulator portfolio, designed specifically for engineers seeking rugged, easy-to-use DC-DC conversion solutions in industrial, automotive, and telecom applications where reliability and minimal external components are critical.
FAQ
What is the maximum input voltage rating for LM2574HVMX-15/NOPB?
The LM2574HVMX-15/NOPB has an absolute maximum input voltage rating of 63V and a recommended maximum operating input voltage of 60V. This high-voltage capability allows direct interface with 48V industrial buses or automotive systems subject to load-dump transients, provided appropriate input filtering and clamping are implemented per TI application guidelines.
Does LM2574HVMX-15/NOPB require external feedback resistors?
No, LM2574HVMX-15/NOPB does not require external feedback resistors. As a fixed-output variant, its 15V regulation is achieved via an internal resistor divider connected to the FB pin, which is left unconnected in standard operation. This eliminates tuning errors, improves temperature stability, and reduces bill-of-materials count compared to adjustable versions.
What package type is used for LM2574HVMX-15/NOPB?
LM2574HVMX-15/NOPB uses a 14-lead wide-body surface-mount package (NS M14B, JEDEC MO-153) with an exposed thermal pad. This package provides enhanced thermal performance over the older 8-pin DIP variant and is optimized for automated assembly and high-power-density PCB layouts in industrial applications.
Can LM2574HVMX-15/NOPB be used in discontinuous conduction mode?
Yes, LM2574HVMX-15/NOPB operates reliably in both continuous and discontinuous conduction modes. At light loads (<~50 mA), inductor current naturally falls to zero each cycle - a normal and well-characterized behavior documented in TI's LM2574 datasheet. No external circuit changes are needed to support this transition.
What is the typical efficiency of LM2574HVMX-15/NOPB at full load?
The LM2574HVMX-15/NOPB achieves 88% typical efficiency at VIN = 18V, VOUT = 15V, and IOUT = 0.5A. This high efficiency minimizes power loss and thermal rise, allowing the device to operate without a heatsink when mounted on a PCB with ≥4 in² of 1 oz. copper connected to its thermal pad.
LM2574HVMX-15/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-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):
- 60V
- Voltage - Output (Min/Fixed):
- 15V
- 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
LM2574HVMX-15/NOPB FAQ
1.How can I place an order for LM2574HVMX-15/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2574HVMX-15/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 LM2574HVMX-15/NOPB reliable?
The price and inventory of LM2574HVMX-15/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2574HVMX-15/NOPB is usually 5 days.
3.What payment methods are accepted for LM2574HVMX-15/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2574HVMX-15/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2574HVMX-15/NOPB?
LM2574HVMX-15/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2574HVMX-15/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 LM2574HVMX-15/NOPB?
For technical support, including LM2574HVMX-15/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2574HVMX-15/NOPB requirements.
6.How does Aetrix verify that LM2574HVMX-15/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2574HVMX-15/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 LM2574HVMX-15/NOPB meets industry standards.
7.What is the process for return or replacement of LM2574HVMX-15/NOPB?
All LM2574HVMX-15/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2574HVMX-15/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 LM2574HVMX-15/NOPB part is unused and in its original packaging.
Return procedure for LM2574HVMX-15/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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