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Texas Instruments LM2574HVM-12
- Part No.:
- LM2574HVM-12
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2574HVM-12.pdf
- Description:
- IC REG BUCK 12V 500MA 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,235
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Product details
Overview
LM2574HVM-12 from Texas Instruments (formerly National Semiconductor) is a monolithic 0.5A step-down (buck) switching voltage regulator in a 14-lead wide surface-mount package, delivering a fixed 12V output with ±4% tolerance over line and load, 52 kHz fixed-frequency operation, and input voltage support up to 60V. It integrates oscillator, error amplifier, current-limiting switch, and thermal shutdown for standalone DC/DC conversion in industrial power rails.
For engineers reviewing the LM2574HVM-12 datasheet, LM2574HVM-12 pinout, LM2574HVM-12 application, or LM2574HVM-12 equivalent, this device serves as a high-efficiency replacement for linear regulators in 12V intermediate bus supplies, on-card converters, and pre-regulators where input voltage exceeds 40V and PCB heat sinking must be minimized.
Technical Context
The LM2574HVM-12 implements a fixed-frequency, current-mode buck topology with internal 52 kHz oscillator and cycle-by-cycle peak current limiting. Its integrated NPN power switch features 0.9V typical saturation voltage at 0.5A, enabling high efficiency without external gate drivers.
It operates across −40°C to +125°C junction temperature, supports TTL-compatible shutdown via the ON/OFF pin (50 µA standby current), and uses external components - catch diode, inductor, and input/output capacitors - to form a complete regulator with only four external parts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±4% over 15–60V input and 0.1–0.5A load - ensures stable rail for downstream logic or analog circuitry without feedback resistor network. |
| Max Input Voltage | 60V - supports wide-input industrial, automotive, or telecom applications where transient spikes exceed standard 40V limits. |
| Output Current | Guaranteed 0.5A continuous - sufficient for powering microcontrollers, sensors, or interface ICs without derating at full ambient temperature. |
| Oscillator Frequency | 52 kHz (±10%) - enables use of low-cost, high-saturation-current off-the-shelf inductors (e.g., 330 µH) and reduces EMI compared to MHz-range converters. |
| Efficiency | 88% at VIN = 15V, IOUT = 0.5A - minimizes power loss and eliminates need for heatsinks beyond standard PCB copper area. |
| Standby Current | 50 µA typical at shutdown - enables low-power system sleep modes without auxiliary LDOs or external enable sequencing. |
| Thermal Protection | Internal thermal shutdown - prevents latch-up or damage during overload or poor heatsinking, with automatic recovery upon cooling. |
Pinout & Package
LM2574HVM-12 is housed in a 14-lead wide surface-mount (WM) package (NS package code M14B), with exposed pad for thermal conduction to PCB copper. The package has θJA = 78°C/W with 4 in² of 1 oz. copper, enabling self-cooled operation at full load in industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Accepts 15–60V DC; requires ≥22 µF low-ESR electrolytic bypass capacitor placed adjacent to pin. |
| 2 (GND) | Power ground reference | Primary return path for switch current and control circuitry; must connect directly to thermal pad and low-impedance ground plane. |
| 3 (OUT) | Switch node | Drives external catch diode anode and inductor; carries pulsed 0.5A current with fast edges - routing must minimize loop area. |
| 4 (GND) | Power ground reference | Second ground pin for high-current return; ties to same ground plane as Pin 2 and thermal pad. |
| 5 (ON/OFF) | Enable/shutdown control | TTL-compatible input: <1.0V (ON), >2.4V (OFF); draws only 12 µA when active, 50 µA in shutdown. |
| 6 (GND) | Power ground reference | Third ground pin; electrically tied internally - all GND pins must be shorted on PCB for optimal noise immunity. |
| 7 (FEEDBACK) | Output voltage sense | Not used in fixed-output LM2574HVM-12; must be left unconnected (NC) per datasheet guidance. |
| 8 (GND) | Power ground reference | Fourth ground pin; completes low-inductance return path for internal bias currents. |
| 9–14 (GND / Thermal Pad) | Thermal and electrical ground | Exposed pad (pins 9–14) is internally connected to GND and must be soldered to ≥4 in² copper pour for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12V output | Eliminates external resistor divider, reducing BOM count, layout sensitivity, and long-term drift in precision 12V rails. |
| 60V maximum input | Supports direct connection to 48V industrial buses or unregulated AC/DC outputs without front-end pre-regulation. |
| Integrated current limit & thermal shutdown | Provides autonomous fault protection without external sensing or control logic - critical for unattended equipment. |
| 52 kHz fixed-frequency operation | Enables predictable EMI filtering and compatibility with low-cost, high-current inductors optimized for Simple Switcher family. |
| TTL shutdown with 50 µA standby | Allows clean system-level power sequencing and battery-backed sleep modes without auxiliary power management ICs. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converting 24V or 48V vehicle battery or factory bus to regulated 12V for MCU, CAN transceivers, and sensors. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, efficient 12V rail with transient robustness against load dump. Use Value: Withstands 60V input surges and delivers 0.5A continuously without heatsink - reduces board space and cost vs. discrete solutions. |
Use Scenario: On-board 12V generation for body electronics (door modules, lighting controllers) where space and thermal constraints prohibit linear regulators. IC Role / Device Role / Timing Role: Standalone buck converter replacing 7812-style linear regulators to cut power dissipation by >70%. Use Value: 88% efficiency at 15VIN/0.5AOUT keeps junction temperature within 125°C limit using only PCB copper as heatsink. |
| Telecom Remote Radio Unit | Test & Measurement Equipment |
|
Use Scenario: Generating stable 12V from -48V telecom supply (with buck-boost configuration) for FPGA I/O banks and ADC references. IC Role / Device Role / Timing Role: High-voltage-capable buck stage in hybrid topology, paired with external inverting stage. Use Value: 60V absolute max input rating allows safe operation during -48V supply transients up to +12V overshoot. |
Use Scenario: Local 12V rail for analog front-ends and signal conditioning circuits requiring low-noise, thermally stable supply. IC Role / Device Role / Timing Role: Pre-regulator feeding low-dropout linear regulators to achieve <10 mVpp ripple and <0.01%/°C drift. Use Value: Fixed 12V output with ±4% tolerance simplifies calibration and eliminates feedback resistor tolerance stack-up. |
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 SOIC-16 package and higher quiescent current (10 mA vs. 5 mA). | Suitable for higher-load systems (e.g., multi-rail power supplies), but overqualified for 0.5A applications where board space is constrained. | Select LM2576HVS-12 only if future load growth to >1A is anticipated; LM2574HVM-12 remains optimal for cost- and size-sensitive 0.5A designs. |
| TPS54202DRCT | 2A synchronous buck, 4.5–28V input, 500 kHz switching, integrated MOSFETs, but requires external compensation and lacks HV input capability. | Better for compact, high-efficiency 12V rails from ≤28V sources; unsuitable for 48V+ inputs or drop-in replacement due to different pinout and control architecture. | Choose TPS54202DRCT for new designs targeting smaller solution size and higher efficiency below 28V; LM2574HVM-12 remains preferred for legacy HV compatibility and design simplicity. |
Compared with LM2576HVS-12 and TPS54202DRCT, the LM2574HVM-12 offers the narrowest footprint and simplest external component count for 0.5A, 60V-input 12V regulation - making it ideal for retrofit, space-constrained, or cost-driven industrial applications where 52 kHz EMI profile is acceptable.
Availability
LM2574HVM-12 is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and automotive body electronics requiring stable component supply, long-lifecycle support, and guaranteed HV input capability.
Supply support for LM2574HVM-12 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 documentation, manufacturing, and support for the SIMPLE SWITCHER™ product line.
The LM2574HVM-12 belongs to TI's SIMPLE SWITCHER™ family of monolithic buck regulators, designed specifically for engineers needing robust, easy-to-use DC/DC conversion without complex compensation or external FETs.
FAQ
What is the maximum input voltage rating for the LM2574HVM-12?
The LM2574HVM-12 has a maximum input voltage rating of 60V, confirmed in the Absolute Maximum Ratings table. This HV version extends beyond the standard LM2574's 45V limit, enabling direct use with 48V industrial buses and telecom supplies. Operation above 60V risks permanent damage, and the device enters thermal shutdown before reaching destructive junction temperatures.
Does the LM2574HVM-12 require external feedback resistors to set its output voltage?
No, the LM2574HVM-12 does not require external feedback resistors. As a fixed-output variant, its 12V regulation is implemented internally; the FEEDBACK pin (Pin 7) is NC (no connection) and must remain unconnected. This eliminates resistor tolerance errors and simplifies layout versus adjustable versions like LM2574HVM-ADJ.
Can the LM2574HVM-12 be used in discontinuous conduction mode (DCM)?
Yes, the LM2574HVM-12 operates reliably in both continuous and discontinuous conduction modes. At light loads (<100 mA), inductor current naturally drops to zero each cycle. The datasheet confirms stable DCM behavior with no minimum load requirement, and typical performance curves include DCM waveforms (e.g., DS011394-7).
What is the recommended inductor value for the LM2574HVM-12 at 0.5A output?
The recommended inductor value for the LM2574HVM-12 at 0.5A output is 330 µH, as specified in the LM2574HV-12 Inductor Selection Guide (Figure 6) and validated in the Typical Application schematic (DS011394-11). Pulse Engineering PE-52627, Renco RL-1284-330, or NPI NP5920/5921 are manufacturer-recommended parts rated for 52 kHz and ≥0.75A RMS current.
How does the ON/OFF pin function on the LM2574HVM-12?
The ON/OFF pin (Pin 5) provides TTL-compatible enable control: driving it below 1.0V (typical) enables regulation, while pulling it above 2.4V (typical) places LM2574HVM-12 in standby with 50 µA quiescent current. The pin draws only 12 µA when active, allowing direct interfacing with microcontroller GPIOs without level shifters or current-limiting resistors.
LM2574HVM-12 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):
- 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 FAQ
1.How can I place an order for LM2574HVM-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2574HVM-12 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 reliable?
The price and inventory of LM2574HVM-12 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 is usually 5 days.
3.What payment methods are accepted for LM2574HVM-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2574HVM-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2574HVM-12?
LM2574HVM-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2574HVM-12 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?
For technical support, including LM2574HVM-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2574HVM-12 requirements.
6.How does Aetrix verify that LM2574HVM-12 is sourced from the original manufacturer or authorized distributors?
All LM2574HVM-12 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 meets industry standards.
7.What is the process for return or replacement of LM2574HVM-12?
All LM2574HVM-12 units undergo pre-shipment inspection (PSI). If there is an issue with LM2574HVM-12, 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 part is unused and in its original packaging.
Return procedure for LM2574HVM-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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