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Texas Instruments LM2574HVM-12/NOPB
- Part No.:
- LM2574HVM-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2574HVM-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 500MA 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:302
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Product details
Overview
LM2574HVM-12/NOPB from Texas Instruments is a monolithic 0.5A step-down (buck) switching voltage regulator in a 14-pin wide surface-mount package, delivering a fixed 12V output with ±4% tolerance across −40°C to +125°C, supporting input voltages up to 60V, and featuring internal 52 kHz oscillator, cycle-by-cycle current limiting, and thermal shutdown - used in industrial power supplies requiring compact, high-efficiency DC-DC conversion.
For engineers reviewing the LM2574HVM-12/NOPB datasheet, LM2574HVM-12/NOPB pinout, LM2574HVM-12/NOPB application, or LM2574HVM-12/NOPB equivalent, key selection considerations include its HV-rated 60V max input, 12V fixed output accuracy under load/line variation, standby current of 50 µA, saturation voltage ≤1.4 V at 0.5A, and compatibility with standard off-the-shelf 330 µH inductors per TI's design guidelines.
Technical Context
The LM2574HVM-12/NOPB integrates a PWM controller, power switch, oscillator, error amplifier, and protection circuitry into a single IC. It operates in continuous conduction mode by default, uses external diode-inductor-capacitor topology, and relies on feedback from the regulated 12V output via internal reference to maintain regulation.
Its control architecture employs fixed-frequency (52 kHz) voltage-mode PWM with internal frequency compensation, enabling stable operation with minimal external components - only four required: input capacitor, output capacitor, catch diode, and inductor - while delivering up to 88% efficiency at 15V input and 0.5A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±4% over full temperature and load range (0.1–0.5A), ensuring stable rail for downstream logic or analog circuitry without trimming. |
| Input Voltage Range | 4.75V to 60V - supports wide industrial input sources including 24V/48V systems and battery-backed supplies with headroom for transients. |
| Max Output Current | 0.5A continuous - sufficient for powering microcontrollers, sensors, or interface ICs without external current boosting. |
| Oscillator Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors (e.g., Pulse PE-52627, 330 µH) and reduces EMI compared to MHz-range converters. |
| Efficiency | 88% at VIN = 15V, IOUT = 0.5A - minimizes thermal stress and eliminates need for heatsinks beyond PCB copper area. |
| Standby Current | 50 µA typical with ON/OFF pin pulled high - enables low-power sleep modes in battery-operated equipment. |
| Saturation Voltage | ≤1.4 V at 0.5A - limits conduction loss in internal switch, directly impacting thermal rise and efficiency at full load. |
Pinout & Package
LM2574HVM-12/NOPB is housed in a 14-lead wide-body surface-mount (WM) package (NS package code M14B), thermally enhanced with exposed pad for PCB heat sinking. Pin layout follows TI's standardized LM2574HV pinout for 14-pin WM variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Accepts 4.75–60V DC; requires local 22 µF electrolytic bypass near pin for stability and transient suppression. |
| 2 (GND) | Power ground reference | Primary return path for switch current and feedback; must connect to low-impedance PCB ground plane. |
| 3 (OUT) | Switch node output | Drives external catch diode anode and inductor; carries pulsed 0.5A current; routing must minimize loop area. |
| 4 (FEEDBACK) | Regulation sense input | Internally tied to 12V output; no external resistor needed for fixed-version operation. |
| 5 (ON/OFF) | Enable/disable control | TTL-compatible; <1.0 V disables (50 µA standby), >2.2 V enables; open-circuit defaults to ON. |
| 6–14 | No internal connection / thermal pad | Pins 6–13 are NC; Pin 14 is exposed thermal pad - must be soldered to ≥4 in² copper for θJA = 78°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity versus adjustable versions. |
| 60V maximum input | Supports direct connection to 48V industrial buses or automotive cold-crank scenarios without pre-regulation. |
| Internal current limiting & thermal shutdown | Protects against short-circuit, overload, and ambient overheating without external sensing circuitry. |
| 52 kHz fixed-frequency operation | Enables predictable EMI filtering and compatibility with low-cost, high-current inductors optimized for this frequency. |
| Only 4 external components required | Reduces design time and board space vs. controller-based solutions; includes diode, inductor, and two capacitors. |
Applications
| Industrial Power Supply | Embedded Controller Rail |
|---|---|
|
Use Scenario: Converting 24V or 48V factory bus to clean 12V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 12V rail with line/load regulation better than ±1.5%. Use Value: Delivers 0.5A at 88% efficiency, reducing thermal load on densely packed control cabinets and eliminating need for forced air cooling. |
Use Scenario: Powering ARM Cortex-M7 MCU, CAN transceiver, and ADC in edge-node gateway hardware. IC Role / Device Role / Timing Role: On-board DC-DC converter generating stable 12V for analog front-end and communication peripherals. Use Value: Fixed-output accuracy (±4%) and 50 µA shutdown current enable reliable wake-on-CAN while minimizing quiescent drain. |
| Test Equipment Power | Legacy System Retrofit |
|
Use Scenario: Replacing linear regulators in benchtop multimeters and signal generators to improve thermal performance. IC Role / Device Role / Timing Role: High-efficiency pre-regulator stepping down unregulated 30V–50V rails to 12V before LDO post-regulation. Use Value: Reduces power dissipation by >70% vs. 7812 linear regulator, allowing same PCB footprint with no heatsink redesign. |
Use Scenario: Upgrading aging 12V linear supplies in telecom line cards where space and efficiency are constrained. IC Role / Device Role / Timing Role: Drop-in replacement for obsolete 7812-based designs using existing 12V feedback trace and output capacitor footprint. Use Value: Maintains identical output voltage while adding overcurrent/thermal protection and extending operating temperature to −40°C. |
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-12 | Higher 3A output current, 52 kHz frequency, but larger 5-pin TO-220 package and higher quiescent current (10 mA vs. 50 µA). | Better suited for higher-current loads; less ideal for space-constrained or low-quiescent designs. | Select LM2576HVS-12 only when >0.5A output or through-hole assembly is required. |
| TPS54202DR | 2A synchronous buck, 4.5–28V input, 500 kHz switching, integrated FETs, but requires external compensation and has no HV rating. | Not suitable for >28V inputs; superior efficiency above 1A but lacks 60V input capability of LM2574HVM-12/NOPB. | Choose TPS54202DR for compact, high-efficiency 12V generation from ≤28V sources where PCB area is critical. |
Compared with LM2576HVS-12 and TPS54202DR, the LM2574HVM-12/NOPB uniquely balances 60V input tolerance, fixed 12V accuracy, ultra-low standby current, and surface-mount compatibility - making it optimal for industrial retrofit and legacy system upgrades where voltage margin and thermal simplicity are prioritized over peak current or switching frequency.
Availability
LM2574HVM-12/NOPB is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded controller power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature extremes.
Supply support for LM2574HVM-12/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 full technical and manufacturing responsibility for the LM2574 series. TI is a global semiconductor leader focused on analog and embedded processing technologies.
The LM2574HVM-12/NOPB belongs to TI's SIMPLE SWITCHER® family of integrated buck regulators, designed specifically for ease-of-use in cost-sensitive, reliability-critical industrial and instrumentation applications where minimal external components and proven thermal robustness are essential.
FAQ
What is the maximum input voltage rating for LM2574HVM-12/NOPB?
The LM2574HVM-12/NOPB supports a maximum input voltage of 60V, as specified in its Absolute Maximum Ratings and Operating Ratings. This HV designation distinguishes it from the standard LM2574 (40V max), enabling direct use with 48V industrial buses and automotive systems experiencing load-dump transients. Exceeding 60V risks permanent damage.
Does LM2574HVM-12/NOPB require external feedback resistors?
No - the LM2574HVM-12/NOPB is a fixed-output variant with internal feedback network set to 12V. Pin 4 (FEEDBACK) is internally connected to the output stage and must be left unconnected externally. Unlike the adjustable LM2574HV-ADJ, no resistor divider is needed, simplifying layout and improving output accuracy.
What thermal management is required for LM2574HVM-12/NOPB?
The LM2574HVM-12/NOPB uses a 14-pin wide surface-mount package with an exposed thermal pad (Pin 14). For rated 0.5A operation across −40°C to +125°C, TI specifies mounting the pad to ≥4 in² of 1 oz. copper, achieving θJA = 78°C/W. Without adequate copper area, junction temperature may exceed 150°C under full load, triggering thermal shutdown.
Which inductor is recommended for LM2574HVM-12/NOPB in a 15V-to-12V, 0.5A application?
TI's LM2574HV-12 Inductor Selection Guide (Figure 6) specifies 330 µH for VIN = 15V and ILOAD = 0.5A in continuous mode. Recommended parts include Pulse Engineering PE-52627, Renco RL-1284-330-43, or NPI NP5920/5921 - all rated for ≥0.75A DC and 52 kHz operation with low DCR to preserve efficiency.
Can LM2574HVM-12/NOPB be used in discontinuous conduction mode?
Yes - the LM2574HVM-12/NOPB operates reliably in both continuous and discontinuous conduction modes. At light loads (<~50 mA), inductor current naturally falls to zero each cycle. TI's design guides assume continuous mode, but discontinuous operation introduces no instability or reliability risk; output ripple and regulation remain within spec per Electrical Characteristics tables.
LM2574HVM-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-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):
- 60V
- Voltage - Output (Min/Fixed):
- 12V
- 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-12/NOPB FAQ
1.How can I place an order for LM2574HVM-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2574HVM-12/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 LM2574HVM-12/NOPB reliable?
The price and inventory of LM2574HVM-12/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2574HVM-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2574HVM-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2574HVM-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2574HVM-12/NOPB?
LM2574HVM-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2574HVM-12/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 LM2574HVM-12/NOPB?
For technical support, including LM2574HVM-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2574HVM-12/NOPB requirements.
6.How does Aetrix verify that LM2574HVM-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2574HVM-12/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 LM2574HVM-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2574HVM-12/NOPB?
All LM2574HVM-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2574HVM-12/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 LM2574HVM-12/NOPB part is unused and in its original packaging.
Return procedure for LM2574HVM-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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