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Texas Instruments LM2575HVN-5.0/NOPB
- Part No.:
- LM2575HVN-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2575HVN-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 16PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,438
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Product details
Overview
LM2575HVN-5.0/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with fixed 5.0V output, 52 kHz internal oscillator, ±4% output voltage tolerance over line/load/temperature, 8V–60V wide input range, 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 LM2575HVN-5.0/NOPB datasheet, LM2575HVN-5.0/NOPB pinout, LM2575HVN-5.0/NOPB application, or LM2575HVN-5.0/NOPB equivalent, key selection considerations include its HV input capability (60V max), TO-263-5 package thermal performance (θJA = 37°C/W with 1 in² copper), TTL-compatible shutdown, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2575HVN-5.0/NOPB implements a fixed-frequency pulse-width modulation (PWM) buck topology with internal 52 kHz oscillator and cycle-by-cycle current limiting. Its control loop uses voltage-mode feedback referenced to a 1.23V internal bandgap, enabling stable regulation without external compensation.
It integrates a 60V-rated N-channel DMOS power switch with 1.4V typical saturation voltage at 1A, operates in continuous conduction mode up to full load, and features automatic frequency foldback (to ~18 kHz) during overload to reduce power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over 0.2–1A load and 8–60V input; ensures stable logic supply under varying source conditions. |
| Input Voltage Range | 8V to 60V DC; supports 48V industrial rails, automotive battery transients, and unregulated AC/DC outputs. |
| Output Current | 1A continuous; sufficient for powering microcontrollers, sensors, and interface ICs without external pass devices. |
| Switching Frequency | 52 kHz ±10%; enables use of low-cost, high-saturation-current toroidal inductors and reduces EMI filtering complexity. |
| Efficiency | 77% at 12VIN/5VOUT/1A; minimizes thermal load vs. linear regulators-no heatsink required at moderate ambient temperatures. |
| Shutdown Current | 50 μA typical; enables low-power standby modes in battery-backed or energy-conscious systems. |
| Thermal Resistance | θJA = 37°C/W (with 1 in² PCB copper); allows 1A operation up to +85°C ambient without forced airflow. |
Pinout & Package
LM2575HVN-5.0/NOPB is housed in a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), featuring exposed thermal pad for enhanced heat transfer to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Input | Unregulated DC input supply | Accepts 8–60V; requires local 47–100 μF electrolytic bypass capacitor to suppress switching noise. |
| 2 - Ground | Power and signal reference | Must connect directly to thermal pad and low-impedance ground plane to ensure stability and thermal performance. |
| 3 - Output | Regulated 5.0V DC output | Drives 1A load; connects to 330–470 μF output capacitor and catch diode anode. |
| 4 - Feedback | Output voltage sensing node | Internally tied to 5.0V output; not accessible-fixed version eliminates 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 60V Power Switch | Eliminates need for external MOSFET and driver; simplifies layout and improves reliability in high-input-voltage applications. |
| Self-Protected Operation | Combines thermal shutdown, cycle-by-cycle current limit (1.7–3.2A peak), and frequency foldback to survive sustained overload or short-circuit events. |
| Minimal External Components | Requires only one inductor, one Schottky catch diode, and two capacitors-reduces BOM count and board area vs. controller-based solutions. |
| Standard Inductor Compatibility | Optimized for widely available 330 μH inductors (e.g., Pulse PE-52627); avoids custom magnetics and accelerates design cycle. |
| Industrial Temperature Range | Rated for −40°C to +125°C junction operation; suitable for enclosed industrial enclosures and automotive under-hood environments. |
Applications
| Industrial PLC I/O Module Power | Automotive Body Control Unit Pre-regulator |
|---|---|
Use Scenario: Powers 5V logic circuitry (MCU, CAN transceiver, ADC) in DIN-rail mounted programmable logic controllers exposed to 24V/48V DC field wiring. IC Role / Device Role / Timing Role: Primary 1A buck regulator converting unregulated 48V rail to clean 5V supply; handles load dumps and reverse-polarity transients via input protection upstream. Use Value: Replaces inefficient 7805-based linear pre-regulators, reducing board temperature rise by >40°C and eliminating heatsinks in confined enclosures. | Use Scenario: Generates stable 5V supply for microcontroller and sensor interfaces in automotive body control modules connected to 12V battery with cold-crank and load-dump conditions. IC Role / Device Role / Timing Role: High-input-voltage buck converter accepting 6V–16V nominal (up to 60V transient) battery input; provides regulated 5V with tight line regulation during cranking. Use Value: Maintains MCU operation down to 6V input (dropout <2V at 1A), meeting ISO 16750-2 cold-crank requirements without auxiliary boost stages. |
| On-Card Telecom Power Supply | Positive-to-Negative Buck-Boost Converter |
Use Scenario: Local 5V generation on telecom line cards where space is constrained and input is derived from -48V DC distribution bus (via isolated DC/DC). IC Role / Device Role / Timing Role: Final-stage point-of-load regulator delivering 1A at 5V from intermediate 12V rail; operates continuously in industrial ambient up to +70°C. Use Value: Achieves 77% efficiency at full load with θJA = 37°C/W, enabling compact double-sided PCB layout without thermal vias or fans. | Use Scenario: Generates -5V rail from +12V supply for op-amp biasing or analog front-end circuits in test equipment. IC Role / Device Role / Timing Role: Configured as inverting buck-boost using standard external components per TI Application Note SLVA001; maintains fixed 5V magnitude with polarity inversion. Use Value: Delivers regulated -5V at up to 500mA using same proven LM2575HVN-5.0/NOPB layout-no redesign needed beyond component repositioning. |
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 | TO-220-5 package; higher θJA (65°C/W no heatsink); 40V max input; identical electrical specs. | Suitable for prototyping or low-volume through-hole assembly; requires heatsink above ~0.5A in still air. | Select when mechanical mounting constraints favor through-hole or when 40V input ceiling is acceptable. |
| LM2596S-5.0 | Higher 1.5A output; 150 kHz switching; requires different inductor/capacitor values; improved efficiency (~85% at 12V→5V). | Better suited for higher-current or space-constrained designs; needs updated layout and component selection. | Choose when >1A load or smaller filter components are required-note non-pin-compatible footprint. |
Compared with LM2575T-5.0, LM2575HVN-5.0/NOPB offers 50% higher input voltage rating and superior thermal performance on PCB; compared with LM2596S-5.0, it trades higher current and frequency for proven ruggedness, simpler magnetics, and lower EMI sensitivity in noisy industrial environments.
Availability
LM2575HVN-5.0/NOPB is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, telecom line cards, and embedded instrumentation requiring stable component supply with long-term manufacturability.
Supply support for LM2575HVN-5.0/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 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 for rugged industrial and automotive applications demanding wide-input-voltage operation, integrated protection, and minimal external components-targeting cost-sensitive yet mission-critical power systems.
FAQ
What is the maximum input voltage rating for LM2575HVN-5.0/NOPB?
The LM2575HVN-5.0/NOPB supports a maximum input voltage of 60V DC, as specified in the Absolute Maximum Ratings table. This HV rating distinguishes it from the standard LM2575 series (40V max) and enables direct use with 48V industrial buses and automotive battery systems including load-dump transients. Operation above 60V risks permanent damage.
Does LM2575HVN-5.0/NOPB require external feedback resistors?
No, LM2575HVN-5.0/NOPB does not require external feedback resistors. As a fixed-output variant, its feedback node is internally connected to generate precisely 5.0V output. The pin 4 (Feedback) terminal is not brought out externally-unlike the adjustable LM2575HV-ADJ version-which eliminates resistor tolerance errors and simplifies layout.
What package type is used for LM2575HVN-5.0/NOPB?
LM2575HVN-5.0/NOPB uses the 5-lead DDPAK/TO-263 surface-mount package (TI package code KTT0005B), featuring an exposed thermal pad on the underside. This package delivers θJA = 37°C/W with 1 in² of PCB copper, significantly better than TO-220 alternatives, and is optimized for automated SMT assembly and high-power-density layouts.
Can LM2575HVN-5.0/NOPB be used in a negative-output configuration?
Yes, LM2575HVN-5.0/NOPB can be configured as a positive-to-negative buck-boost converter per TI Application Note SLVA001. In this topology, the IC regulates the magnitude of the inverted output (e.g., −5V) using the same external components as the standard buck circuit-only diode and capacitor polarities are reversed. Output current capability is reduced to ~500mA due to duty-cycle limitations.
What is the typical efficiency of LM2575HVN-5.0/NOPB at full load?
LM2575HVN-5.0/NOPB achieves 77% typical efficiency at 12V input, 5V/1A output, and 25°C ambient, as measured per the standard test circuit (Figure 25). Efficiency rises to ~88% at higher input voltages (e.g., 25V→5V) due to reduced duty cycle and conduction losses, and falls slightly at elevated temperatures or with non-optimal external component selection.
LM2575HVN-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- 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:
- 16-PDIP
LM2575HVN-5.0/NOPB FAQ
1.How can I place an order for LM2575HVN-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVN-5.0/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 LM2575HVN-5.0/NOPB reliable?
The price and inventory of LM2575HVN-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVN-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVN-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVN-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVN-5.0/NOPB?
LM2575HVN-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVN-5.0/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 LM2575HVN-5.0/NOPB?
For technical support, including LM2575HVN-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVN-5.0/NOPB requirements.
6.How does Aetrix verify that LM2575HVN-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVN-5.0/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 LM2575HVN-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVN-5.0/NOPB?
All LM2575HVN-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVN-5.0/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 LM2575HVN-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVN-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2575HVN-5.0/NOPB Tags
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