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Texas Instruments LM2575HVM-12/NOPB
- Part No.:
- LM2575HVM-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2575HVM-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 1A 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,568
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Product details
Overview
LM2575HVM-12/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with fixed 12V output, 60V maximum input voltage rating, 52 kHz fixed-frequency internal oscillator, ±4% output voltage tolerance, and integrated thermal shutdown and cycle-by-cycle current limiting. It replaces linear regulators in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2575HVM-12/NOPB datasheet, LM2575HVM-12/NOPB pinout, LM2575HVM-12/NOPB application, or LM2575HVM-12/NOPB equivalent, this page delivers verified electrical specs, TO-263 package details, real-world use cases, and two validated alternative parts for buck converter design validation and supply continuity planning.
Technical Context
The LM2575HVM-12/NOPB implements a pulse-width modulation (PWM) buck topology with internal NPN switch, fixed 52 kHz oscillator, and voltage-mode control loop. It operates across −40°C to +125°C junction temperature and supports continuous 1A output current with dropout behavior defined by minimum on-time and saturation voltage.
Its HV variant enables operation up to 60V input, making it suitable for unregulated 48V telecom rails or automotive battery-supervised systems. The device requires only four external components-input capacitor, output capacitor, catch diode, and inductor-and integrates frequency compensation, eliminating need for external loop compensation networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over 0.2–1 A load and 15–60 V input; ensures stable rail for microcontrollers and analog circuitry without feedback resistor network. |
| Input Voltage Range | 4.75 V to 60 V; supports wide-input industrial and automotive applications including 24V/48V bus systems with transient headroom. |
| Output Current | 1 A continuous; sufficient to power FPGA I/O banks, sensor signal chains, or isolated gate drivers without derating at 25°C ambient. |
| Switching Frequency | 52 kHz ±10%; enables use of low-cost, high-saturation-current toroidal inductors and reduces EMI filtering complexity vs. MHz-range converters. |
| Efficiency | 88% at VIN = 15 V, IOUT = 1 A; minimizes thermal load and eliminates need for heatsink in PCB-mounted TO-263 packages under typical loads. |
| Thermal Resistance | θJA = 37°C/W with ≥1 in² copper pour; enables reliable operation at full load without forced air in compact industrial enclosures. |
| Shutdown Current | 50 μA typical; allows low-power standby mode in battery-backed or energy-conscious systems via TTL-compatible ON/OFF pin. |
Pinout & Package
LM2575HVM-12/NOPB is housed in a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), featuring exposed thermal pad for enhanced heat dissipation. Pin 1 is Input, Pin 2 is Output, Pin 3 is Ground, Pin 4 is Feedback (internally tied to 12V divider), and Pin 5 is ON/OFF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Input voltage supply | Accepts 4.75–60 V DC; must be decoupled with ≥47 μF aluminum electrolytic capacitor placed within 5 mm of pin. |
| Pin 2 (OUT) | Regulated output node | Delivers 12 V @ 1 A; connects directly to catch diode anode and output capacitor; trace width must support ≥1.5 A RMS current. |
| Pin 3 (GND) | Power and signal reference | Common return for internal switch, control circuitry, and external components; requires low-inductance connection to thermal pad and system ground plane. |
| Pin 4 (FEEDBACK) | Voltage sense input | Internally connected to 12V resistive divider; not user-accessible-no external resistor network required for fixed-output operation. |
| Pin 5 (ON/OFF) | Enable/disable control | TTL-compatible logic input: <0.8 V disables regulator (50 μA standby); >2.2 V enables normal operation; open-circuit defaults to ON. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated thermal shutdown | Activates at ~160°C junction temperature and latches off until thermal recovery, protecting PCB and adjacent components during overload or poor heatsinking. |
| Cycle-by-cycle current limit | Peak switch current limited to 1.7–3.2 A depending on temperature; prevents inductor saturation and MOSFET failure during short-circuit events. |
| Fixed-frequency PWM control | 52 kHz oscillator eliminates external timing components and simplifies EMI filter design compared to variable-frequency alternatives. |
| Low external part count | Only four passive components required (CIN, COUT, L, D1)-reduces BOM cost, layout area, and qualification effort for Class B industrial designs. |
| High-voltage input capability | 60 V absolute max input enables direct interface with 48 V PoE++ injectors, solar charge controllers, or legacy telecom rectifiers without pre-regulation. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converts 24V vehicle battery rail to stable 12V for microcontroller, CAN transceiver, and sensor biasing in door modules. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 12V rail with built-in fault protection and low quiescent current in sleep mode. Use Value: Eliminates need for discrete NPN pass transistor and external current sense, reducing component count by 7+ parts while maintaining ASIL-B compatible reliability. |
Use Scenario: Powers 12V analog front-end and ADC in engine control unit where input may surge to 40V during load dump. IC Role / Device Role / Timing Role: High-input-voltage buck regulator with thermal foldback and current limiting to survive automotive transients per ISO 7637-2. Use Value: Sustains regulation through 60V load-dump spikes without external TVS clamping, reducing board space and bill-of-materials cost. |
| Telecom Remote Radio Unit | Programmable Logic Controller I/O Card |
|
Use Scenario: Generates clean 12V from 48V backplane for RF amplifier bias and DAC reference in outdoor small cell base stations. IC Role / Device Role / Timing Role: Efficient pre-regulator stepping down 48V to 12V before LDO post-regulation, minimizing heat generation in sealed enclosures. Use Value: Achieves 88% efficiency at full load, cutting thermal dissipation by >60% versus linear solution-enabling fanless operation in IP65-rated housings. |
Use Scenario: Supplies isolated 12V rail to digital I/O channels on modular PLC backplanes with varying input voltage due to field wiring. IC Role / Device Role / Timing Role: Robust buck converter handling 18–60V input range while delivering ripple-free 12V to optocoupler drivers and level shifters. Use Value: Maintains ±4% output accuracy across full line/load range, ensuring consistent logic thresholds and analog measurement integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575T-12 | TO-220 through-hole package; θJA = 45°C/W (no thermal pad); same electrical specs and pinout but higher thermal resistance. | Suitable for prototyping or low-volume assemblies where manual soldering or socketing is preferred; not recommended for high-density automated PCBs. | Select LM2575T-12 only when mechanical mounting constraints prohibit surface-mount packages or when thermal load is below 0.7 A continuous. |
| MP1584EN-LF-Z | 40V max input; 1.5A output; 1.5 MHz switching; requires external compensation; smaller solution size but higher EMI sensitivity. | Better suited for space-constrained consumer electronics; lacks HV rating and automotive-grade thermal robustness of LM2575HVM-12/NOPB. | Choose MP1584EN-LF-Z only when board area is critical and input never exceeds 40V; verify conducted/radiated emissions with actual layout. |
Compared with LM2575T-12, the LM2575HVM-12/NOPB offers superior thermal performance in SMT layouts, while MP1584EN-LF-Z trades input voltage headroom and ruggedness for higher frequency and smaller magnetics-making LM2575HVM-12/NOPB optimal for industrial 48V systems demanding reliability over miniaturization.
Availability
LM2575HVM-12/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and programmable logic controller I/O cards requiring stable component supply across extended product lifecycles.
Supply support for LM2575HVM-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 is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with decades of heritage in high-reliability power conversion solutions.
The LM2575HV product line was designed specifically for industrial and automotive applications requiring wide-input-voltage buck regulation with integrated protection, minimal external components, and long-term manufacturability.
FAQ
What is the maximum input voltage rating for LM2575HVM-12/NOPB?
The LM2575HVM-12/NOPB supports a maximum input voltage of 60 V, as specified in its Absolute Maximum Ratings table. This HV rating distinguishes it from standard LM2575 variants (45 V max) and enables direct use with 48 V systems subject to load dump or surge conditions. Operation above 60 V risks permanent damage to the internal NPN switch.
Does LM2575HVM-12/NOPB require external feedback resistors?
No, the LM2575HVM-12/NOPB is a fixed-output version with internal resistor divider set for 12 V. Pin 4 (FEEDBACK) is not accessible externally and must remain unconnected. Adding external resistors will disrupt regulation and is incompatible with the LM2575HVM-12/NOPB's internal architecture.
What package type does LM2575HVM-12/NOPB use, and how is thermal performance achieved?
The LM2575HVM-12/NOPB uses a 5-lead DDPAK/TO-263 package (KTT0005B) with an exposed thermal pad. Its θJA is 37°C/W when mounted on ≥1 in² of PCB copper, enabling full 1 A output without a heatsink. Proper soldering of the thermal pad to inner-layer copper planes is essential to realize this spec.
Can LM2575HVM-12/NOPB be used in automotive applications?
Yes-the LM2575HVM-12/NOPB operates from −40°C to +125°C junction temperature and withstands 60 V input, meeting key requirements for automotive body electronics. Its integrated thermal shutdown and current limiting provide protection against load dump (ISO 7637-2 Pulse 5a) when combined with appropriate input filtering.
What is the typical efficiency of LM2575HVM-12/NOPB at full load?
LM2575HVM-12/NOPB achieves 88% efficiency at VIN = 15 V and IOUT = 1 A, as measured per the test circuit in the official datasheet (SNVS106E). Efficiency rises to ~90% at lighter loads and decreases slightly at higher input voltages due to increased switching losses.
LM2575HVM-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 24-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:
- 1A
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
LM2575HVM-12/NOPB FAQ
1.How can I place an order for LM2575HVM-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVM-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 LM2575HVM-12/NOPB reliable?
The price and inventory of LM2575HVM-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 LM2575HVM-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVM-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVM-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVM-12/NOPB?
LM2575HVM-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVM-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 LM2575HVM-12/NOPB?
For technical support, including LM2575HVM-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVM-12/NOPB requirements.
6.How does Aetrix verify that LM2575HVM-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVM-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 LM2575HVM-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVM-12/NOPB?
All LM2575HVM-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVM-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 LM2575HVM-12/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVM-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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