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Texas Instruments LM2575HVT-5.0
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- Part No.:
- LM2575HVT-5.0
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5
- Datasheet:
-
LM2575HVT-5.0.pdf
- Description:
- IC REG BUCK 5V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,505
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Product details
Overview
LM2575HVT-5.0 from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in TO-220 package, delivering a fixed 5.0V output with ±4% tolerance across 8V–60V input range, 52 kHz fixed-frequency operation, 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-5.0 datasheet, LM2575HVT-5.0 pinout, LM2575HVT-5.0 application, or LM2575HVT-5.0 equivalent, key selection criteria include its 60V max input rating, 1A continuous output capability, TTL-compatible shutdown control, 77% typical efficiency at 12VIN/1A, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2575HVT-5.0 integrates a PWM controller, power switch, oscillator, error amplifier, and protection circuitry into a single TO-220 device. Its fixed-frequency 52 kHz operation enables predictable EMI filtering and stable loop compensation using only four external components: input capacitor, output capacitor, catch diode, and inductor.
It employs cycle-by-cycle current limiting and thermal shutdown for fault protection, with a saturation voltage of ≤1.4V at 1A and feedback reference voltage of 1.23V. The HV variant supports up to 60V input-critical for automotive and industrial 24/48V bus applications where transient overvoltage immunity is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over 8V–60V input and 0.2A–1A load - ensures stable logic supply under wide-line and load variation. |
| Max Input Voltage | 60V - supports 48V industrial rails and automotive cold-crank transients without external pre-regulation. |
| Output Current | 1A continuous - drives microcontrollers, sensors, and interface ICs directly without parallel devices. |
| Oscillator Frequency | 52 kHz fixed - simplifies EMI filter design and avoids audible noise; reduces inductor size vs. lower-frequency alternatives. |
| Efficiency | 77% typical at 12VIN/1A - cuts heat sink requirements versus linear regulators and extends thermal margin in enclosed systems. |
| Shutdown Current | 50 μA typical - enables low-power standby modes in battery-backed or energy-conscious systems. |
| Thermal Resistance | θJA = 65°C/W (TO-220, no heatsink); θJC = 2°C/W - allows direct PCB mounting with minimal copper area for thermal relief. |
Pinout & Package
LM2575HVT-5.0 is housed in a 5-lead TO-220 package (Package Number NDH0005D), with the tab electrically connected to Pin 2 (Output). Mounting requires thermal consideration: junction-to-ambient resistance is 65°C/W with minimal copper, dropping to 45°C/W with ~4 in² copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Input | Unregulated DC input | Accepts 8–60V; requires local 47–100 μF aluminum electrolytic bypass capacitor. |
| 2 - Output | Regulated 5.0V output | Connected to tab; delivers 1A; requires 330–470 μF output capacitor for <1% ripple. |
| 3 - Ground | Power and signal reference | Single-point ground connection critical for noise immunity and stability. |
| 4 - Feedback | Internal voltage reference node | Internally tied to 5.0V output; not accessible - fixed-output version omits external resistor divider. |
| 5 - ON/OFF | TTL-compatible enable control | Logic-high (>2.2V) enables regulation; logic-low (<0.8V) disables output and reduces quiescent current to 50 μA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated protection | Thermal shutdown + cycle-by-cycle current limiting (1.7–3.2A peak) - eliminates need for external fault-handling circuitry. |
| Minimal BOM | Only 4 external components required (inductor, diode, input/output caps) - accelerates prototyping and reduces bill-of-material cost. |
| Standard inductor support | Optimized for off-the-shelf 330 μH inductors (e.g., PE-52627) - avoids custom magnetics and shortens supply chain lead time. |
| High-voltage input rating | 60V absolute maximum input - enables direct use on 48V telecom, industrial PLC, and automotive battery-supplied systems. |
| TTL shutdown interface | 50 μA standby current with logic-level control - supports microcontroller-driven power sequencing and system-level sleep modes. |
Applications
| Industrial Power Supplies | Automotive ECUs |
|---|---|
Use Scenario: On-board 5V rail generation from 24V vehicle battery with load dump immunity. IC Role / Device Role / Timing Role: Primary buck regulator providing clean, regulated 5V for MCU, CAN transceivers, and analog sensors. Use Value: 60V input rating withstands ISO 7637-2 Load Dump pulses; 1A output powers full ECU subsystem without derating. |
Use Scenario: Compact 5V supply for engine control module in space-constrained engine bay. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter replacing linear regulator to eliminate heat sink and reduce thermal stress. Use Value: 77% efficiency at 1A reduces power dissipation by >2W vs. linear solution, improving reliability in high-ambient environments. |
| Embedded Control Systems | Test & Measurement Equipment |
Use Scenario: Local 5V rail for FPGA I/O banks and peripheral interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: Point-of-load regulator delivering stable 5V despite fluctuating 24V backplane voltage. Use Value: ±4% output tolerance and 0.2–1A load regulation ensure consistent digital logic margins across operating temperature (−40°C to +125°C). |
Use Scenario: Portable benchtop instrument requiring low-noise 5V supply with fast transient response. IC Role / Device Role / Timing Role: Pre-regulator feeding low-dropout linear stage to achieve ultra-low output ripple. Use Value: Fixed 52 kHz frequency enables precise EMI filtering; 50 μA shutdown current preserves battery life during idle periods. |
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-5.0 | 40V max input (vs. 60V); same pinout, package, and 5V output spec. | Suitable for 12/24V systems without high-voltage transients; not rated for 48V industrial or automotive load dump. | Select LM2575T-5.0 when input stays ≤40V and cost optimization is prioritized over HV robustness. |
| LM2596-5.0 | Higher 3A output current; 150 kHz switching; requires different inductor/capacitor values. | Better suited for higher-current loads or smaller passive components; lacks identical thermal performance in TO-220 footprint. | Choose LM2596-5.0 only if ≥2A output or smaller solution size is required - redesign of magnetics and layout is mandatory. |
Compared with LM2575T-5.0, the LM2575HVT-5.0 adds 20V headroom for transient resilience without changing PCB layout; versus LM2596-5.0, it trades higher current for proven thermal behavior and simpler EMI filtering at 52 kHz - making it optimal for ruggedized 1A applications where reliability trumps miniaturization.
Availability
LM2575HVT-5.0 is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, embedded control systems, and test equipment requiring stable component supply with long-term lifecycle assurance.
Supply support for LM2575HVT-5.0 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 LM2575HV product line was designed specifically for industrial and automotive applications demanding extended input voltage range (up to 60V), robust thermal performance, and drop-in replacement capability for legacy linear regulators.
FAQ
What is the maximum input voltage rating for the LM2575HVT-5.0?
The LM2575HVT-5.0 has an absolute maximum input voltage rating of 63V and a recommended operating maximum of 60V. This high-voltage capability distinguishes it from standard LM2575 variants (40V max) and makes it suitable for 48V industrial buses and automotive applications where load dump transients exceed 40V. Operation above 60V risks permanent damage even if within the 63V absolute limit.
Does the LM2575HVT-5.0 require an external feedback resistor network?
No, the LM2575HVT-5.0 does not require an external feedback resistor network because it is a fixed-output version. Pin 4 (Feedback) is internally connected to the 5.0V output node. Unlike the adjustable LM2575HV-ADJ variant, no external resistors are needed - simplifying layout and reducing component count while maintaining ±4% output accuracy across temperature and load.
Can the LM2575HVT-5.0 be used in thermally constrained environments without a heatsink?
Yes, the LM2575HVT-5.0 can operate without an external heatsink under moderate load conditions. With θJA = 65°C/W (no copper), it sustains 1A output at ambient temperatures up to ~65°C assuming 12V input. Adding ~4 in² of PCB copper reduces θJA to 45°C/W, enabling full 1A operation up to 85°C ambient - verified per TI's thermal model and SNVS106E datasheet Figure 21.
What type of catch diode is recommended for the LM2575HVT-5.0?
A Schottky diode rated for ≥1.2× the maximum load current (≥1.2A) and ≥1.25× the maximum input voltage (≥75V) is recommended. Common selections include SR103 (3A, 30V), MBR2535CT (25A, 35V dual), or 1N5822 (3A, 40V). The diode must handle reverse recovery during 52 kHz switching; fast-recovery or Schottky types minimize losses and prevent voltage spikes that could trigger internal current limiting.
How does the ON/OFF pin function on the LM2575HVT-5.0?
The ON/OFF pin (Pin 5) provides TTL-compatible enable control: applying ≥2.2V enables regulation, while ≤0.8V disables the output and reduces quiescent current to 50 μA typical. The pin draws ≤30 μA in shutdown and ≤12 μA when active. This feature supports microcontroller-driven power sequencing, battery-saving sleep modes, and system-level fault isolation - all without external level-shifting circuitry.
LM2575HVT-5.0 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- 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-5.0 FAQ
1.How can I place an order for LM2575HVT-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVT-5.0 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-5.0 reliable?
The price and inventory of LM2575HVT-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVT-5.0 is usually 5 days.
3.What payment methods are accepted for LM2575HVT-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVT-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVT-5.0?
LM2575HVT-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVT-5.0 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-5.0?
For technical support, including LM2575HVT-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVT-5.0 requirements.
6.How does Aetrix verify that LM2575HVT-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2575HVT-5.0 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-5.0 meets industry standards.
7.What is the process for return or replacement of LM2575HVT-5.0?
All LM2575HVT-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVT-5.0, 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-5.0 part is unused and in its original packaging.
Return procedure for LM2575HVT-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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