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Texas Instruments LM2575HVT-ADJ
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- Part No.:
- LM2575HVT-ADJ
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5
- Datasheet:
-
LM2575HVT-ADJ.pdf
- Description:
- IC REG BUCK ADJ 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,019
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Product details
Overview
LM2575HVT-ADJ 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, ±4% output voltage tolerance, and integrated thermal shutdown/current limiting. It replaces linear regulators in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2575HVT-ADJ datasheet, LM2575HVT-ADJ pinout, LM2575HVT-ADJ application, or LM2575HVT-ADJ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The LM2575HVT-ADJ implements a current-mode PWM buck topology with internal 52 kHz oscillator, cycle-by-cycle current limiting, and thermal shutdown. Its feedback pin senses a precise 1.23V reference to set output via external resistor divider, enabling stable regulation across 1.23V–37V range.
It operates from 8V–60V input, supports TTL-compatible shutdown (50 μA standby), and integrates a 1A N-channel DMOS switch with 0.9V typical saturation voltage. The device requires only four external components: input capacitor, output capacitor, catch diode, and inductor - all standard off-the-shelf parts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous - supports full-load operation without external current boosting |
| Input Voltage Range | 8V to 60V - enables direct use with 48V industrial rails or unregulated AC/DC outputs |
| Output Voltage Range | 1.23V to 37V (adjustable) - set by external R1/R2 divider; 1.23V reference tolerance ±4% |
| Switching Frequency | 52 kHz fixed - simplifies EMI filtering and allows use of low-cost, high-current inductors |
| Efficiency | 77% at 12VIN/5VOUT/1A - reduces thermal load vs. linear regulators; no heatsink required below ~0.5A |
| Standby Current | 50 μA typical - enables low-power shutdown mode for battery-backed or energy-sensitive systems |
| Thermal Protection | Internal thermal shutdown - disables output above 150°C junction temperature; auto-recovery on cooldown |
Pinout & Package
LM2575HVT-ADJ is housed in a 5-lead TO-220 package (package code NDH0005D), with tab connected to Pin 2 (Output) for thermal conduction. Mounting requires mechanical fixation and thermal interface to heatsink or copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: Input | Main power input | Accepts 8–60V DC; requires ≥100 μF low-ESR input capacitor placed within 1 cm |
| 2: Output | Switched output node | Drives inductor; connects to cathode of catch diode and output capacitor; tab is electrically tied here |
| 3: Ground | Power and signal reference | Single-point ground connection for input cap, output cap, and feedback network; critical for noise immunity |
| 4: Feedback | Voltage sense input | Monitors resistor divider output; regulates to 1.23V; high-impedance (50 nA bias) - keep trace short and shielded |
| 5: ON/OFF | Digital enable control | TTL-compatible; <1.0V = ON, >2.2V = OFF; pulls to GND internally when floating |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1A DMOS switch | Eliminates need for external MOSFET and gate driver; reduces BOM count and layout complexity |
| Fixed 52 kHz oscillator | Enables predictable EMI profile and consistent inductor sizing; no external timing components required |
| TTL shutdown capability | Supports system-level power sequencing and low-power sleep modes with microcontroller GPIO control |
| Thermal + current protection | Prevents catastrophic failure during overload, short-circuit, or poor heatsinking - no external protection circuitry needed |
| Standard inductor compatibility | Works with off-the-shelf 330–470 μH shielded inductors (e.g., PE-52627, PE-53118); no custom magnetics required |
Applications
| Industrial Power Supply | Automotive Subsystem Regulator |
|---|---|
|
Use Scenario: Converting 24V truck battery or 48V telecom rail to 5V/12V for control logic and sensors. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated DC output with wide input tolerance. Use Value: Withstands load dump transients up to 60V input; eliminates need for pre-regulator stage and reduces board area by 40% vs. linear solution. |
Use Scenario: Generating stable 3.3V for infotainment MCU and CAN transceivers in passenger vehicle ECUs. IC Role / Device Role / Timing Role: Point-of-load (POL) DC-DC converter with enable control synchronized to vehicle ignition state. Use Value: 50 μA standby current extends battery life during key-off; thermal shutdown prevents fault propagation in sealed enclosures. |
| Programmable Lab PSU | Legacy Equipment Retrofit |
|
Use Scenario: Adjustable bench power supply (1.23–30V, 1A) with analog voltage control via potentiometer. IC Role / Device Role / Timing Role: Core regulation element in feedback loop; output set by precision R1/R2 divider. Use Value: ±4% output accuracy over line/load/temperature ensures calibration-grade stability; 52 kHz frequency avoids audible noise in lab environments. |
Use Scenario: Replacing obsolete 78xx linear regulators in aging test equipment to reduce heat and improve reliability. IC Role / Device Role / Timing Role: Drop-in efficiency upgrade - same TO-220 footprint, but with external inductor/diode added. Use Value: Cuts thermal dissipation by >70% at 1A/12V output; eliminates mandatory heatsink, enabling compact rework into legacy chassis. |
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-ADJ | Higher 3A output current; 52 kHz frequency; SOIC-24 package (surface-mount) | Requires PCB redesign for SMT layout and larger inductor; better suited for higher-current or space-constrained designs | Select when >1A load or automated assembly is required; not pin-compatible with LM2575HVT-ADJ |
| MP1584EN-LF-Z | 2A output; 1.5 MHz switching; smaller external components; no built-in thermal shutdown latch | Needs external overtemperature protection; optimized for compact consumer-grade supplies, not industrial ruggedness | Choose for cost-sensitive, high-density designs where 60V input rating and latch-off thermal protection are not mandatory |
Compared with LM2575HVT-ADJ, LM2576HVS-ADJ offers higher current and surface-mount convenience but demands layout changes, while MP1584EN-LF-Z enables miniaturization at the expense of industrial-grade fault protection and 60V input resilience.
Availability
LM2575HVT-ADJ is available at Aetrix Electronics and suitable for industrial power supplies, automotive subsystems, programmable lab equipment, and legacy equipment retrofits requiring stable component supply, long-lifecycle support, and proven ruggedness in harsh environments.
Supply support for LM2575HVT-ADJ 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 reliable, high-volume power conversion solutions.
The LM2575 series was designed as a robust, easy-to-use replacement for three-terminal linear regulators in medium-power industrial and automotive applications - prioritizing simplicity, thermal resilience, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM2575HVT-ADJ?
The LM2575HVT-ADJ supports a maximum input voltage of 60V, as specified in its Absolute Maximum Ratings and Operating Ratings. This HV (High Voltage) variant is distinct from the standard LM2575-N (40V max) and enables direct use with 48V systems, industrial rails, and transient-prone inputs. Exceeding 60V risks permanent damage per TI's datasheet SNVS106E.
How do I set the output voltage of LM2575HVT-ADJ?
The LM2575HVT-ADJ output voltage is set using an external resistor divider between output and feedback (Pin 4), referenced to its internal 1.23V bandgap. Use R1 (connected to FB) and R2 (from FB to GND) with VOUT = 1.23 × (1 + R2/R1). For example, 1.23V to 12V requires R2/R1 ≈ 8.76; TI recommends R1 = 1k–5k Ω with 1% metal film resistors for stability.
Does LM2575HVT-ADJ require a heatsink under full 1A load?
LM2575HVT-ADJ can operate at 1A without an external heatsink only under favorable thermal conditions: ambient ≤50°C, TO-220 tab soldered to ≥4 in² copper area (θJA = 45°C/W), and moderate input-output differential (e.g., 12VIN/5VOUT). At 60VIN/5VOUT, power dissipation exceeds 55W - a heatsink is mandatory. Thermal shutdown activates at 150°C junction temperature.
What type of catch diode is recommended for LM2575HVT-ADJ?
A Schottky diode rated for ≥1.2× output current and ≥1.25× maximum input voltage is required. For LM2575HVT-ADJ at 1A/60VIN, select a 3A, 100V Schottky (e.g., MBR3100, SR3100). TI specifically recommends MBR340 for 10V outputs and 31DQ04 for higher voltages. Fast recovery diodes may be used if Schottky VF causes efficiency loss at low loads.
Is LM2575HVT-ADJ RoHS compliant and lead-free?
Yes - LM2575HVT-ADJ is manufactured in TI's RoHS-compliant, lead-free TO-220 package (NDH0005D) and meets JEDEC J-STD-020 moisture sensitivity level 3. The device carries the "Green" designation per TI's packaging standards and is suitable for modern electronics assembly without exemption requirements.
LM2575HVT-ADJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 FAQ
1.How can I place an order for LM2575HVT-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVT-ADJ 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 reliable?
The price and inventory of LM2575HVT-ADJ 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 is usually 5 days.
3.What payment methods are accepted for LM2575HVT-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVT-ADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVT-ADJ?
LM2575HVT-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVT-ADJ 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?
For technical support, including LM2575HVT-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVT-ADJ requirements.
6.How does Aetrix verify that LM2575HVT-ADJ is sourced from the original manufacturer or authorized distributors?
All LM2575HVT-ADJ 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 meets industry standards.
7.What is the process for return or replacement of LM2575HVT-ADJ?
All LM2575HVT-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVT-ADJ, 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 part is unused and in its original packaging.
Return procedure for LM2575HVT-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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