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Texas Instruments LM2575HVT-15/LF03
- Part No.:
- LM2575HVT-15/LF03
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2575HVT-15/LF03.pdf
- Description:
- IC REG BUCK 15V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,078
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Product details
Overview
LM2575HVT-15/LF03 from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in TO-220 package, delivering a fixed 15V output with ±4% tolerance across 18V–60V input range, 88% efficiency at 18VIN/1A, and integrated thermal shutdown and cycle-by-cycle current limiting. It replaces linear regulators in industrial power supplies requiring compact, high-efficiency DC-DC conversion.
For engineers reviewing the LM2575HVT-15/LF03 datasheet, LM2575HVT-15/LF03 pinout, LM2575HVT-15/LF03 application, or LM2575HVT-15/LF03 equivalent, key selection criteria include its 60V max input rating, 52 kHz fixed-frequency operation, TTL-compatible shutdown pin, 1.23V feedback reference (for adjustable variants), and compatibility with standard off-the-shelf inductors - all critical for ruggedized 15V rail generation in wide-input industrial systems.
Technical Context
The LM2575HVT-15/LF03 integrates a PWM controller, power switch, oscillator, error amplifier, and protection circuitry into a single TO-220 device. Its internal 52 kHz oscillator drives a N-channel MOSFET switch with 0.9V typical saturation voltage and 2.2A peak current limit, enabling stable buck conversion without external timing components.
Line regulation is maintained within ±0.5% over 18V–60V input, load regulation holds ±0.8% across 0.2A–1A, and the feedback pin (pin 4) references 1.23V with 50 nA bias current - enabling precise output setting in adjustable versions and ensuring tight 15V output accuracy in this fixed variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V ±4% over full operating temperature (−40°C to +125°C) and line/load conditions - ensures stable 15V rail without external resistors. |
| Input Voltage Range | 18V to 60V DC - supports wide-input industrial, automotive, and telecom applications where supply rails vary significantly. |
| Output Current | 1A continuous - sufficient to power analog front-ends, sensors, or logic subsystems without external boost stages. |
| Switching Frequency | 52 kHz fixed - enables use of low-cost, low-ESR electrolytic capacitors and standard 330 µH inductors (e.g., PE-52627). |
| Efficiency | 88% at VIN = 18V, IOUT = 1A - reduces thermal load vs. linear regulators and eliminates need for large heat sinks in most designs. |
| Thermal Protection | Internal thermal shutdown with automatic recovery - prevents latch-up during overload or poor heatsinking scenarios. |
| Shutdown Current | 50 µA typical standby current when ON/OFF pin pulled high - enables low-power sleep modes in battery-backed systems. |
Pinout & Package
LM2575HVT-15/LF03 uses a 5-lead TO-220 package (package code NDH0005D) with exposed tab electrically connected to Pin 2 (Output). Mounting requires thermal interface to heatsink or PCB copper pour for reliable 1A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: Input | Unregulated DC input supply | Accepts 18–60V; requires ≥100 µF/75V aluminum electrolytic capacitor placed within 1 cm for stability. |
| 2: Output | Regulated 15V DC output | Switch node and regulated output; connects to inductor, catch diode anode, and output capacitor; tab is tied to this pin. |
| 3: Ground | Power and signal reference | Single-point ground connection required; must tie to input and output capacitor negatives and feedback network ground. |
| 4: Feedback | Voltage sense input | Internally biased to 1.23V; unused in fixed-output LM2575HVT-15/LF03 but must be left open or decoupled per layout guidelines. |
| 5: ON/OFF | TTL-compatible enable control | Drives internal regulator ON when ≤0.8V (max), OFF when ≥2.2V (min); 50 µA standby current when held high. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage support | 60V absolute maximum input enables direct connection to 48V industrial buses or unregulated rectified AC rails. |
| Integrated protection | Cycle-by-cycle current limiting (1.7–3.2A trip range) plus thermal shutdown prevents damage during short-circuit or overtemperature events. |
| Minimal external parts | Only four components required: input cap, output cap, inductor, and Schottky catch diode - simplifies BOM and layout validation. |
| Standard inductor compatibility | Optimized for off-the-shelf 330 µH inductors (e.g., Pulse PE-52627), eliminating custom magnetics and accelerating design cycles. |
| High efficiency at full load | 88% efficiency at 18VIN/1A reduces power loss to <2W, allowing operation without forced air or oversized heatsinks in ambient ≤60°C. |
Applications
| Industrial Power Supply | Automotive Subsystem Regulator |
|---|---|
|
Use Scenario: Generating a clean 15V rail from a 24V or 48V vehicle battery or industrial PLC backplane under varying load and temperature. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 15V for analog sensor interfaces and CAN transceivers. Use Value: 60V input rating withstands load-dump transients up to 60V; 88% efficiency minimizes heat buildup in sealed enclosures. |
Use Scenario: Powering engine control module peripherals such as fuel injectors, ignition drivers, and diagnostic circuits. IC Role / Device Role / Timing Role: High-reliability DC-DC converter delivering fault-tolerant 15V from noisy, wide-range automotive battery (9–60V). Use Value: Built-in thermal shutdown and current limiting ensure safe operation during cold-crank (low VIN) or short-circuit faults. |
| Telecom Line Card Supply | Test Equipment Auxiliary Rail |
|
Use Scenario: Providing 15V bias for op-amps, ADC drivers, and RF front-end ICs on modular telecom line cards with limited board space. IC Role / Device Role / Timing Role: Compact, self-contained step-down regulator replacing discrete buck controllers and MOSFETs. Use Value: TO-220 package allows direct heatsink mounting; 52 kHz frequency avoids EMI-sensitive bands while enabling small passive sizing. |
Use Scenario: Generating a stable 15V auxiliary supply for calibration circuits, DMM reference sources, or programmable load controllers. IC Role / Device Role / Timing Role: Precision-regulated voltage source with low output ripple (<1% of 15V) and excellent line/load regulation. Use Value: ±4% output tolerance and <±0.8% load regulation ensure measurement-grade stability without post-regulation LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575T-15 | Same 15V fixed output, but rated for 40V max input (vs. 60V for HV version); lower thermal resistance not specified for TO-220 variant. | Suitable only for ≤40V input systems; cannot survive automotive load dump or industrial 48V surges. | Select LM2575T-15 only if input never exceeds 40V and cost is primary driver. |
| LM2596S-15 | Higher 3A output current, 150 kHz switching frequency, and improved 92% efficiency; requires different inductor (68 µH) and layout due to faster edges. | Better suited for space-constrained designs needing higher current or lower ripple, but introduces stricter EMI filtering requirements. | Choose LM2596S-15 when >1A load or tighter ripple specs apply; verify PCB layout for 150 kHz operation. |
Compared with LM2575T-15, LM2575HVT-15/LF03 adds 20V headroom for surge resilience; versus LM2596S-15, it trades higher current and efficiency for proven 52 kHz robustness, simpler magnetics, and legacy design compatibility.
Availability
LM2575HVT-15/LF03 is available at Aetrix Electronics and suitable for industrial power supplies, automotive subsystems, and telecom line card designs requiring stable component supply with long-term manufacturability and extended temperature support.
Supply support for LM2575HVT-15/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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM2575 series was designed as a drop-in replacement for linear regulators in medium-power applications, targeting cost-sensitive, thermally constrained industrial and automotive systems requiring simple, robust 1A buck conversion.
FAQ
What is the maximum input voltage rating for LM2575HVT-15/LF03?
The LM2575HVT-15/LF03 has an absolute maximum input voltage of 63V and a recommended operating maximum of 60V DC. This high-voltage rating distinguishes it from standard LM2575 variants (40V max) and makes it suitable for industrial 48V systems and automotive applications subject to load-dump transients. Operation above 60V risks permanent damage even if within the 63V absolute limit.
Does LM2575HVT-15/LF03 require external feedback resistors?
No, LM2575HVT-15/LF03 is a fixed-output variant with internal resistor divider set to 15V; the feedback pin (Pin 4) is not connected internally and must remain unconnected or bypassed with a small capacitor per TI layout guidelines. External resistors are only required for the adjustable version (LM2575HV-ADJ).
What thermal management is required for LM2575HVT-15/LF03 at full 1A load?
At 1A output and 18V input, LM2575HVT-15/LF03 dissipates approximately 2W. With θJA = 65°C/W (no heatsink) or 45°C/W (4 in² copper), junction temperature rise reaches 130°C or 90°C respectively - exceeding the 125°C max TJ. A minimum 1.5 in² copper pour or small heatsink is required for continuous 1A operation at ambient ≤60°C.
Which catch diode is recommended for LM2575HVT-15/LF03?
Texas Instruments recommends a 3A Schottky diode such as MBR340 (40V, 3A) or SR104 (40V, 1A) for LM2575HVT-15/LF03. The diode must withstand 60V reverse voltage (1.25×60V = 75V derated) and conduct ≥1.2×1A = 1.2A average current; Schottky type minimizes forward drop and improves efficiency over fast-recovery silicon diodes.
Can LM2575HVT-15/LF03 be synchronized to an external clock?
No, LM2575HVT-15/LF03 features a fixed 52 kHz internal oscillator with no synchronization input. Its frequency may drift ±10% over temperature and supply, and cannot be locked to an external clock source. For synchronizable buck regulators, consider TI's TPS5430 or newer LM5115-based designs.
LM2575HVT-15/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):
- 15V
- 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-15/LF03 FAQ
1.How can I place an order for LM2575HVT-15/LF03 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVT-15/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-15/LF03 reliable?
The price and inventory of LM2575HVT-15/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-15/LF03 is usually 5 days.
3.What payment methods are accepted for LM2575HVT-15/LF03?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVT-15/LF03 transactions.
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4.How is shipping managed for LM2575HVT-15/LF03?
LM2575HVT-15/LF03 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVT-15/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-15/LF03?
For technical support, including LM2575HVT-15/LF03 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVT-15/LF03 requirements.
6.How does Aetrix verify that LM2575HVT-15/LF03 is sourced from the original manufacturer or authorized distributors?
All LM2575HVT-15/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-15/LF03 meets industry standards.
7.What is the process for return or replacement of LM2575HVT-15/LF03?
All LM2575HVT-15/LF03 units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVT-15/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-15/LF03 part is unused and in its original packaging.
Return procedure for LM2575HVT-15/LF03:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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