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Texas Instruments LM2575HVT-ADJ/NOPB
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- Part No.:
- LM2575HVT-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5
- Datasheet:
-
LM2575HVT-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:584
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Product details
Overview
LM2575HVT-ADJ/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in TO-220 package, featuring adjustable output (1.23V–37V), 52 kHz fixed-frequency operation, 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 LM2575HVT-ADJ/NOPB datasheet, LM2575HVT-ADJ/NOPB pinout, LM2575HVT-ADJ/NOPB application, or LM2575HVT-ADJ/NOPB equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and technically accurate alternative comparisons - all grounded in TI's SNVS106E datasheet and official package documentation.
Technical Context
The LM2575HVT-ADJ/NOPB integrates a PWM controller, power switch, oscillator, error amplifier, and current-limit protection in a single TO-220-5 package. Its internal 52 kHz oscillator enables stable operation with standard off-the-shelf inductors and minimizes EMI compared to variable-frequency alternatives.
It operates in continuous conduction mode with feedback referenced to the 1.23 V ±4% internal reference. Input voltage range extends to 60 V (HV version), supporting wide-input industrial and automotive pre-regulator applications without external boost circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A continuous - supports full-load operation without external current boosting |
| Input Voltage Range | 4.75 V to 60 V - enables direct connection to unregulated 48 VDC rails or automotive battery systems |
| Output Voltage Range | 1.23 V to 37 V (adjustable via two resistors) - covers most intermediate rail requirements including 3.3 V, 5 V, 12 V, 15 V, and custom values |
| Feedback Reference | 1.23 V ±4% - sets precision of output regulation; determines R1/R2 ratio for target VOUT |
| Switching Frequency | 52 kHz ±10% - fixed frequency simplifies EMI filtering and allows use of low-cost, high-saturation-current inductors |
| Efficiency | Up to 88% at 12 VIN/12 VOUT - reduces thermal load vs. linear regulators and eliminates need for large heatsinks in many designs |
| Thermal Shutdown | Activates at TJ ≥150 °C - protects device during overload or poor heatsinking; auto-recovery on cooldown |
Pinout & Package
LM2575HVT-ADJ/NOPB 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 for >0.5 A continuous loads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Input | Voltage supply input | Accepts 4.75–60 V; requires local 100 μF/75 V electrolytic bypass capacitor |
| 2 - Output | Switched output node | Connects to inductor and catch diode anode; tab is internally tied to this pin for thermal conduction |
| 3 - Ground | Power and signal reference | Must be low-inductance connection to system ground plane; shared with feedback return |
| 4 - Feedback | Regulation sense input | Monitors resistor divider from VOUT; 50 nA bias current enables high-impedance programming (R1 = 1–5 kΩ) |
| 5 - ON/OFF | Logic-controlled enable | TTL-compatible; <1.0 V disables (50 μA standby), >2.2 V enables; open-circuit defaults to ON |
Key Features
| Feature | Design Value |
|---|---|
| Integrated thermal shutdown | Prevents permanent damage during sustained overloads or inadequate heatsinking |
| Cycle-by-cycle current limit | Clamps peak switch current to ~2.2 A, enabling robust short-circuit protection without external sensing |
| Fixed 52 kHz oscillator | Eliminates need for external timing components and ensures predictable EMI profile |
| TTL shutdown capability | Reduces quiescent current to 50 μA typical, enabling low-power standby modes in battery-backed systems |
| Requires only 4 external components | Inductor, catch diode, input cap, output cap - accelerates design-in and reduces BOM count |
Applications
| Industrial Power Supply | Automotive Pre-Regulator |
|---|---|
Use Scenario: 24 V vehicle battery powers 5 V microcontroller and 3.3 V sensor rails in engine control unit. IC Role / Device Role / Timing Role: Primary buck converter stepping down 9–36 V battery range to stable 5 V output. Use Value: 60 V max input rating handles load-dump transients; thermal shutdown prevents failure during under-hood temperature excursions. |
Use Scenario: 48 V telecom rack supplies regulated 12 V for fan controllers and monitoring circuits. IC Role / Device Role / Timing Role: High-efficiency pre-regulator reducing 48 V to 12 V before LDO post-regulation. Use Value: 88% efficiency at 12 VIN/12 VOUT cuts heat generation by >60% vs. linear solution; TO-220 package mounts directly to chassis. |
| On-Card DC-DC Converter | Positive-to-Negative Inverter |
Use Scenario: PCB-mounted power module generates isolated 3.3 V from 12 V backplane in networking switch. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator minimizing board space and layout complexity. Use Value: Only four external parts required; 52 kHz frequency allows small, low-cost inductors (e.g., PE-52627) and avoids audible noise. |
Use Scenario: Generating –5 V rail from +12 V supply for op-amp biasing in test equipment. IC Role / Device Role / Timing Role: Configured as buck-boost inverting regulator using standard external components. Use Value: Adjustable feedback reference enables precise negative output setting; built-in current limit protects during polarity reversal faults. |
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-ADJ | Standard-voltage version (max 40 V input); lacks HV rating and higher thermal margin | Suitable only for ≤40 V input systems; not rated for automotive load dump or industrial 48 V rails | Select LM2575HVT-ADJ/NOPB when input may exceed 40 V or transient immunity is required. |
| LM2596T-ADJ | Higher 150 kHz switching frequency; lower 3 A current limit; different pinout and compensation | Enables smaller magnetics but requires redesign of inductor, diode, and feedback network; no pin compatibility | Choose LM2596T-ADJ only if size reduction justifies full schematic/layout revision and requalification. |
Compared with LM2575T-ADJ and LM2596T-ADJ, the LM2575HVT-ADJ/NOPB uniquely combines 60 V input tolerance, TO-220 thermal performance, and drop-in compatibility with legacy LM2575 designs - making it the only option for ruggedized 48 V industrial or automotive pre-regulation without layout change.
Availability
LM2575HVT-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronics, telecom infrastructure, and embedded control systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2575HVT-ADJ/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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The LM2575HVT-ADJ/NOPB belongs to TI's SIMPLE SWITCHER® family - designed specifically for cost-sensitive, high-reliability DC-DC conversion where ease of design, thermal robustness, and long-term supply stability are critical.
FAQ
What is the maximum input voltage rating for LM2575HVT-ADJ/NOPB?
The LM2575HVT-ADJ/NOPB supports a maximum input voltage of 60 V, confirmed in the Absolute Maximum Ratings table of TI's SNVS106E datasheet. This HV rating distinguishes it from standard LM2575 variants (40 V max) and enables use in 48 V industrial systems and automotive applications subject to load-dump transients. Exceeding 60 V risks permanent damage.
How do I set the output voltage for LM2575HVT-ADJ/NOPB?
The LM2575HVT-ADJ/NOPB output voltage is set using a resistor divider between VOUT, FB (Pin 4), and GND. With a fixed 1.23 V feedback reference, VOUT = 1.23 × (1 + R2/R1). TI recommends R1 between 1 kΩ and 5 kΩ (1% metal film); for example, R1 = 2.0 kΩ and R2 = 6.12 kΩ yields 5 V. Layout must keep FB trace short and away from noise sources.
Does LM2575HVT-ADJ/NOPB require a heatsink?
Yes - the LM2575HVT-ADJ/NOPB in TO-220 package has θJA = 65 °C/W (no heatsink) and θJC = 2 °C/W. At 1 A load with 24 VIN/5 VOUT, power dissipation exceeds 19 W, raising junction temperature beyond 150 °C without heatsinking. A minimum 2.5″×2.5″ copper pour or aluminum heatsink is required for continuous operation above 0.5 A.
What type of catch diode should be used with LM2575HVT-ADJ/NOPB?
A Schottky diode rated for ≥1.2× output current and ≥1.25× maximum input voltage is required. For 1 A output and 60 V max input, TI recommends MBR340 (40 V, 3 A) or SR103 (30 V, 1 A) in the datasheet. Fast recovery diodes like UF4007 are acceptable but reduce efficiency due to higher forward voltage and reverse recovery losses.
Is LM2575HVT-ADJ/NOPB RoHS compliant and lead-free?
Yes - the /NOPB suffix explicitly denotes "No Lead (Pb)-Free" per TI's packaging nomenclature. LM2575HVT-ADJ/NOPB meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations and halogen-free molding compound. Full compliance documentation is available in TI's Quality & Environmental section for part number LM2575HVT-ADJ/NOPB.
LM2575HVT-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 57V
- 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-ADJ/NOPB FAQ
1.How can I place an order for LM2575HVT-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVT-ADJ/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 LM2575HVT-ADJ/NOPB reliable?
The price and inventory of LM2575HVT-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVT-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVT-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVT-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVT-ADJ/NOPB?
LM2575HVT-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVT-ADJ/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 LM2575HVT-ADJ/NOPB?
For technical support, including LM2575HVT-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVT-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2575HVT-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVT-ADJ/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 LM2575HVT-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVT-ADJ/NOPB?
All LM2575HVT-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVT-ADJ/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 LM2575HVT-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVT-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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