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Texas Instruments LM2575HVT-12/LF03
- Part No.:
- LM2575HVT-12/LF03
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2575HVT-12/LF03.pdf
- Description:
- IC REG BUCK 12V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:225
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Product details
Overview
LM2575HVT-12/LF03 from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in TO-220 package, delivering a fixed 12V output with ±4% tolerance across 15V–60V input range and 0.2A–1A load. It integrates PWM controller, power switch, and protection circuitry, enabling high-efficiency DC/DC conversion without external compensation. Used in industrial power supplies where input voltage exceeds 40V.
For engineers reviewing the LM2575HVT-12/LF03 datasheet, LM2575HVT-12/LF03 pinout, LM2575HVT-12/LF03 application, or LM2575HVT-12/LF03 equivalent, key selection criteria include its 60V max input rating, 52 kHz fixed-frequency operation, thermal shutdown, cycle-by-cycle current limiting, and compatibility with standard off-the-shelf inductors - all critical for ruggedized buck converter design.
Technical Context
The LM2575HVT-12/LF03 implements a fixed-frequency (52 kHz) current-mode PWM architecture with internal oscillator, error amplifier, and NPN power switch. Its feedback loop references a precise 1.23V internal bandgap, comparing it to the output via resistive divider (not required for fixed 12V version).
Protection features include thermal shutdown triggered at 150°C junction temperature and cycle-by-cycle peak current limiting set at 1.7–3.2A. Standby mode draws only 50 μA when the ON/OFF pin is pulled high, enabling low-power system control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±4% over 0.2A–1A load and 15V–60V input - ensures stable rail for downstream logic or analog circuitry without trimming. |
| Max Input Voltage | 60V - supports wide-input applications including 48V telecom, automotive transients, and industrial bus systems. |
| Switching Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity vs. MHz-range converters. |
| Output Current | 1A continuous - sufficient to power microcontrollers, sensors, or interface ICs without external pass devices. |
| Efficiency | 88% at VIN = 15V, IOUT = 1A - minimizes thermal load and eliminates need for heatsink under typical conditions. |
| Quiescent Current | 5 mA operating / 50 μA standby - enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Thermal Resistance | 65°C/W (JA, no heatsink); 45°C/W (JA, 4 in² copper) - defines PCB copper area requirements for thermal management. |
Pinout & Package
LM2575HVT-12/LF03 is housed in a 5-lead TO-220 package (Package Number NDH0005D), with the tab electrically connected to Pin 2 (Output). Mounting requires thermal interface to heatsink or large copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Input | Unregulated DC supply input | Accepts 15–60V; requires local 100 μF/75V electrolytic bypass capacitor to suppress switching noise. |
| 2 - Output | Regulated 12V switching node | Drives inductor and catch diode; connects to tab for thermal conduction; must be routed with low-inductance path. |
| 3 - Ground | Power and signal reference | Single-point ground connection essential; ties internal circuitry, feedback reference, and thermal substrate. |
| 4 - Feedback | Voltage sense input | Internally tied to 12V divider; unused in fixed-output version - leave unconnected or grounded per layout guidelines. |
| 5 - ON/OFF | Logic-controlled enable/disable | TTL-compatible: <0.8V = ON, >2.2V = OFF; pulls to VIN via resistor if not actively driven. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power switch | NPN transistor with 0.9V saturation voltage at 1A - reduces conduction loss and simplifies BOM vs. external MOSFET solutions. |
| Self-protecting architecture | Combined thermal shutdown + cycle-by-cycle current limit - prevents damage during overload, short-circuit, or ambient overheating. |
| Minimal external components | Only 4 parts required: input cap, output cap, inductor, catch diode - accelerates prototyping and improves reliability. |
| Standard inductor compatibility | Optimized for 330 μH (12V out, 25V in) - eliminates custom magnetics; validated with Pulse PE-52627 and Renco RL1952. |
| High-voltage input support | 60V absolute max input - enables direct regulation from 48V systems without pre-regulator stage. |
Applications
| Industrial Power Supply | Automotive Control Unit |
|---|---|
|
Use Scenario: Converting 24V/48V vehicle battery or factory bus to stable 12V for ECUs, CAN transceivers, and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 12V rail with transient immunity up to 60V. Use Value: Eliminates need for discrete high-voltage front-end; withstands load dump (ISO 7637-2) without derating. |
Use Scenario: On-board power for engine control modules requiring robust 12V supply under wide temperature and voltage variation. IC Role / Device Role / Timing Role: Main DC/DC converter delivering 1A at 12V with built-in thermal and overcurrent protection. Use Value: Maintains regulation during cold cranking (down to 6V) and load dump (up to 60V) without external supervision. |
| Telecom Remote Terminal | Test Equipment Power Module |
|
Use Scenario: Powering remote radio units or line cards fed from -48V DC plant with positive 12V derived via buck-boost or auxiliary supply. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator accepting up to 60V input from intermediate bus. Use Value: Supports legacy 48V infrastructure while delivering clean, efficient 12V output with minimal board space. |
Use Scenario: Benchtop or modular test instruments needing reliable, low-noise 12V rail for analog front-ends and digital logic. IC Role / Device Role / Timing Role: Fixed-output switching regulator replacing linear regulators to reduce heat and improve efficiency. Use Value: Delivers 88% efficiency at full load - cuts thermal design burden and enables compact, fanless enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575HVT-12 | Same silicon, identical electrical specs; differs only in packaging marking (no /LF03 suffix) and tape-and-reel vs. tube packaging. | No functional difference; suitable for same PCB layouts and thermal designs. | Select LM2575HVT-12/LF03 for traceability and TI's enhanced P+ product testing; otherwise functionally interchangeable. |
| LM2596T-12 | Higher 3A output current, 150 kHz switching frequency, lower 47V max input, and different pinout (TO-220-5 but non-compatible). | Requires new PCB layout and inductor selection; better suited for higher-current or smaller-filter designs. | Choose LM2596T-12 only if >1A output or smaller solution size is required; not a drop-in replacement. |
Compared with LM2575HVT-12/LF03, LM2575HVT-12 offers identical performance with standard packaging, while LM2596T-12 trades input voltage headroom for higher current and frequency - making LM2575HVT-12/LF03 optimal for 48V+ industrial inputs where reliability and proven thermal behavior are prioritized.
Availability
LM2575HVT-12/LF03 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control units, telecom remote terminals, and test equipment requiring stable component supply with long-term manufacturability.
Supply support for LM2575HVT-12/LF03 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 technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2575HVT-12/LF03 belongs to TI's SIMPLE SWITCHER® family - designed specifically for cost-sensitive, high-input-voltage DC/DC applications where ease of design, thermal robustness, and minimal external components are critical.
FAQ
What is the maximum input voltage rating for LM2575HVT-12/LF03?
The LM2575HVT-12/LF03 has an absolute maximum input voltage of 63V and a recommended operating maximum of 60V. This high-voltage capability allows direct regulation from 48V systems and tolerance of automotive load-dump transients per ISO 7637-2. Operation above 60V voids specifications and risks permanent damage.
Does LM2575HVT-12/LF03 require external compensation components?
No, LM2575HVT-12/LF03 does not require external compensation components. It integrates internal frequency compensation optimized for standard 330 μH inductors and typical output capacitor values. The fixed-frequency, current-mode architecture ensures stable operation with only four external parts: input capacitor, output capacitor, inductor, and catch diode.
Can LM2575HVT-12/LF03 be used in adjustable-output configurations?
No, LM2575HVT-12/LF03 is a fixed 12V output variant and cannot be adjusted. Its feedback network is internal and trimmed at wafer test. For adjustable output, use LM2575HV-ADJ instead - which provides a 1.23V reference and requires external resistor divider to set output voltage between 1.23V and 57V.
What thermal management is required for LM2575HVT-12/LF03 at full 1A load?
At 1A output and 25V input, LM2575HVT-12/LF03 dissipates ~13W. With θJA = 65°C/W (no heatsink), junction temperature rises ~845°C above ambient - unsustainable. A minimum 4 in² copper pour reduces θJA to 45°C/W, limiting rise to ~585°C. For reliable 1A operation, a heatsink or ≥6 in² thermal pad is mandatory.
Is LM2575HVT-12/LF03 RoHS compliant and lead-free?
Yes, LM2575HVT-12/LF03 is RoHS compliant and lead-free. The /LF03 suffix explicitly denotes lead-free (Pb-free) construction per TI's packaging standards, with matte tin lead finish and halogen-free molding compound. It meets JEDEC J-STD-020 moisture sensitivity level 3.
LM2575HVT-12/LF03 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5 Formed Leads
- 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:
- 1A
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LM2575HVT-12/LF03 FAQ
1.How can I place an order for LM2575HVT-12/LF03 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVT-12/LF03 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 LM2575HVT-12/LF03 reliable?
The price and inventory of LM2575HVT-12/LF03 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVT-12/LF03 is usually 5 days.
3.What payment methods are accepted for LM2575HVT-12/LF03?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVT-12/LF03 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVT-12/LF03?
LM2575HVT-12/LF03 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVT-12/LF03 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 LM2575HVT-12/LF03?
For technical support, including LM2575HVT-12/LF03 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVT-12/LF03 requirements.
6.How does Aetrix verify that LM2575HVT-12/LF03 is sourced from the original manufacturer or authorized distributors?
All LM2575HVT-12/LF03 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 LM2575HVT-12/LF03 meets industry standards.
7.What is the process for return or replacement of LM2575HVT-12/LF03?
All LM2575HVT-12/LF03 units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVT-12/LF03, 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 LM2575HVT-12/LF03 part is unused and in its original packaging.
Return procedure for LM2575HVT-12/LF03:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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