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Texas Instruments LM2574HVM-15
- Part No.:
- LM2574HVM-15
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2574HVM-15.pdf
- Description:
- IC REG BUCK 15V 500MA 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,250
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Product details
Overview
LM2574HVM-15 from Texas Instruments (formerly National Semiconductor) is a monolithic 0.5A step-down (buck) switching voltage regulator with fixed 15V output, 60V maximum input voltage, 52 kHz internal oscillator, and thermal/current protection. It replaces linear regulators in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2574HVM-15 datasheet, LM2574HVM-15 pinout, LM2574HVM-15 application, or LM2574HVM-15 equivalent, this device serves as a drop-in high-voltage buck solution for 15V rail generation in embedded systems, instrumentation, and distributed power architectures where input voltage may reach 60V and board-level heat sinking is constrained.
Technical Context
The LM2574HVM-15 integrates a PWM controller, power switch, oscillator, error amplifier, and protection circuitry in a single IC. Its fixed-frequency 52 kHz operation enables predictable EMI filtering and stable loop compensation using only four external components: input capacitor, output capacitor, catch diode, and inductor.
It operates in continuous conduction mode at full load (0.5A), features cycle-by-cycle current limiting (1.0A typical peak limit), and enters low-power standby (50 µA typical) when the ON/OFF pin is pulled high. The HV variant supports up to 60V input while maintaining ±4% output voltage tolerance across −40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V ±4% over line/load/temperature - ensures stable 15V rail without feedback resistor network. |
| Max Input Voltage | 60V - supports wide-input applications such as automotive battery-supplied systems or industrial 48V bus derivatives. |
| Output Current | 0.5A guaranteed - sufficient for powering microcontrollers, sensors, and analog front-ends without external pass devices. |
| Oscillator Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors and simplifies EMI filter design. |
| Efficiency | 88% at VIN = 18V, IOUT = 0.5A - reduces thermal load on PCB copper traces, eliminating need for heatsinks in most layouts. |
| Standby Current | 50 µA typical - enables low-power shutdown in battery-backed or energy-sensitive systems. |
| Protection Features | Thermal shutdown + cycle-by-cycle current limit - prevents damage during overload, short-circuit, or ambient overheating. |
Pinout & Package
LM2574HVM-15 is housed in a 14-lead wide surface-mount (WM) package (NS package code M14B), optimized for thermal performance with 78°C/W junction-to-ambient resistance under 4 in² copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input voltage supply | Accepts 18–60V DC; requires ≥22 µF input capacitor placed adjacent to minimize switching noise. |
| 2 (GND) | Power ground reference | Primary return path for input/output currents; must connect to low-impedance ground plane. |
| 3 (OUT) | Switching node / power switch output | Drives external catch diode and inductor; high dv/dt node requiring short trace routing. |
| 4 (GND) | Power ground reference | Second ground pin for improved thermal and current return path; must be tied to same ground plane as Pin 2. |
| 5 (ON/OFF) | Enable/disable control input | TTL-compatible; <0.8V = ON, >2.4V = OFF; draws ≤30 µA in shutdown state. |
| 6 (GND) | Power ground reference | Third ground pin enhancing thermal dissipation and reducing ground bounce. |
| 7 (GND) | Power ground reference | Fourth ground pin; all GND pins (2,4,6,7) must be soldered to PCB copper for optimal thermal transfer. |
| 8 (FB) | Feedback input (not used in fixed-output version) | No connection required; internally tied to 15V reference; leave floating or grounded per layout best practice. |
| 9–14 (GND) | Power ground terminals | Remaining six pins are GND; all must be soldered to maximize thermal conduction and minimize impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 15V output | Eliminates external resistor divider, reducing BOM count and improving long-term output stability. |
| 60V input rating | Supports direct connection to unregulated 48V telecom or industrial bus rails without pre-regulation. |
| Only 4 external components | Reduces design time and layout complexity: input cap, output cap, Schottky diode, and inductor. |
| Internal 52 kHz oscillator | Removes need for external timing components and ensures consistent switching behavior across temperature. |
| TTL-compatible ON/OFF control | Enables seamless integration with microcontroller GPIOs or system power sequencers without level-shifting. |
| Thermal + current protection | Self-protecting operation avoids catastrophic failure during transient overloads or poor heatsinking conditions. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Generating a stable 15V rail from a 24V or 48V industrial bus to power PLC I/O modules and analog signal conditioners. IC Role / Device Role / Timing Role: Primary step-down regulator providing regulated 15V output with high line regulation and fault resilience. Use Value: Delivers 0.5A at 88% efficiency with no heatsink required, reducing system size and cost versus linear alternatives. |
Use Scenario: Supplying 15V to microcontroller peripherals and CAN transceivers in body control units exposed to 60V load-dump transients. IC Role / Device Role / Timing Role: High-input-voltage buck converter enabling direct connection to vehicle battery without discrete TVS pre-protection. Use Value: Withstands 60V max input and includes thermal shutdown, ensuring reliability during cold-cranking and load-dump events. |
| Test & Measurement Equipment | Distributed Sensor Node |
Use Scenario: Providing clean 15V bias for op-amps and ADC drivers in portable multimeters and data loggers powered by Li-ion packs. IC Role / Device Role / Timing Role: Efficient pre-regulator stepping down variable battery voltage (10–28V) to fixed 15V before LDO post-regulation. Use Value: Maintains ±4% output accuracy across wide input range and temperature, critical for precision analog signal chains. |
Use Scenario: Powering 15V analog sensors and wireless transceivers in remote environmental monitoring nodes powered by solar-charged 24V batteries. IC Role / Device Role / Timing Role: Standby-enabled buck regulator that shuts down between measurement cycles to extend battery life. Use Value: Draws only 50 µA in shutdown, enabling multi-year operation on small sealed lead-acid or LiFePO₄ cells. |
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-15 | Higher 3A output current, 52 kHz frequency, but larger SOIC-TO-220 package and higher quiescent current (10 mA vs. 5 mA). | Better suited for higher-load applications; less suitable for space-constrained SMT layouts due to through-hole thermal pad. | Select LM2576HVS-15 if >0.5A output or enhanced thermal margin is required; LM2574HVM-15 remains optimal for compact 0.5A designs. |
| TPS54318RTER | 3A synchronous buck, 2.95–6V input, 1.2–15V adjustable output, 2.5 MHz switching - incompatible input range and topology. | Requires external compensation and supports only up to 6V input; not a direct replacement for 60V-capable applications. | Choose TPS54318RTER only for low-input, high-frequency, synchronous designs; LM2574HVM-15 is irreplaceable for 18–60V fixed-15V use cases. |
Compared with LM2576HVS-15 and TPS54318RTER, the LM2574HVM-15 uniquely balances 60V input capability, fixed 15V output, compact 14-pin WM package, and proven field reliability in harsh industrial environments - making it the sole fit for legacy-compliant, high-voltage, medium-current buck applications.
Availability
LM2574HVM-15 is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronics, test equipment, and distributed sensor networks requiring stable component supply and long-lifecycle support.
Supply support for LM2574HVM-15 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 support, documentation, and manufacturing continuity for the SIMPLE SWITCHER™ product line.
The LM2574HVM-15 belongs to TI's SIMPLE SWITCHER™ family of integrated buck regulators, designed specifically for engineers needing robust, easy-to-use DC/DC conversion with minimal external components in industrial, automotive, and instrumentation applications.
FAQ
What is the maximum input voltage rating for the LM2574HVM-15?
The LM2574HVM-15 supports a maximum input voltage of 60V, as specified in its Absolute Maximum Ratings and Operating Ratings. This HV variant is distinct from the standard LM2574 (40V max) and enables direct use with 48V industrial buses and automotive systems subject to load-dump transients. Exceeding 60V risks permanent damage to the internal power switch.
Does the LM2574HVM-15 require an external feedback resistor network?
No, the LM2574HVM-15 does not require an external feedback resistor network because it is a fixed-output version delivering 15V. The FB pin is internally connected to the 15V reference and should be left unconnected or grounded per layout guidelines - unlike the adjustable LM2574HV-ADJ variant which requires two external resistors to set VOUT.
What package type is used for the LM2574HVM-15?
The LM2574HVM-15 uses a 14-lead wide surface-mount (WM) package, designated NS package code M14B. It features multiple ground pins (Pins 2, 4, 6, 7, and 9–14) designed for low thermal resistance (78°C/W with 4 in² copper) and must be soldered fully to the PCB for reliable thermal performance and current handling.
Can the LM2574HVM-15 be synchronized to an external clock?
No, the LM2574HVM-15 cannot be synchronized to an external clock. It contains a fixed-frequency 52 kHz internal oscillator with no synchronization input pin or frequency adjustment capability. For synchronizable buck regulators, consider TI's newer TPS54x series or LM5116, not the LM2574HVM-15.
What is the typical efficiency of the LM2574HVM-15 at full load?
The LM2574HVM-15 achieves 88% typical efficiency at VIN = 18V, VOUT = 15V, and IOUT = 0.5A, as measured per the manufacturer's test conditions. Efficiency varies with input voltage and load - e.g., dropping to ~77% at VIN = 12V - but remains consistently above 80% across its recommended operating range due to low saturation voltage and optimized switching architecture.
LM2574HVM-15 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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):
- 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
LM2574HVM-15 FAQ
1.How can I place an order for LM2574HVM-15 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2574HVM-15 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-15 reliable?
The price and inventory of LM2574HVM-15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2574HVM-15 is usually 5 days.
3.What payment methods are accepted for LM2574HVM-15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2574HVM-15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2574HVM-15?
LM2574HVM-15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2574HVM-15 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-15?
For technical support, including LM2574HVM-15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2574HVM-15 requirements.
6.How does Aetrix verify that LM2574HVM-15 is sourced from the original manufacturer or authorized distributors?
All LM2574HVM-15 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-15 meets industry standards.
7.What is the process for return or replacement of LM2574HVM-15?
All LM2574HVM-15 units undergo pre-shipment inspection (PSI). If there is an issue with LM2574HVM-15, 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-15 part is unused and in its original packaging.
Return procedure for LM2574HVM-15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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