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Texas Instruments LM2575HVSX-15/NOPB
- Part No.:
- LM2575HVSX-15/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2575HVSX-15/NOPB.pdf
- Description:
- IC REG BUCK 15V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,014
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Product details
Overview
LM2575HVSX-15/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with fixed 15V output, 60V maximum input voltage, 52 kHz fixed-frequency oscillator, ±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 LM2575HVSX-15/NOPB datasheet, LM2575HVSX-15/NOPB pinout, LM2575HVSX-15/NOPB application, or LM2575HVSX-15/NOPB equivalent, this page delivers verified electrical specs, TO-263 package details, real-world use cases, and two validated alternative parts for design flexibility and supply continuity.
Technical Context
The LM2575HVSX-15/NOPB implements a current-mode control buck topology with internal 52 kHz oscillator, cycle-by-cycle current limiting, and thermal shutdown. Its high-voltage capability (60V max VIN) enables direct operation from unregulated 48V telecom or industrial rails without pre-regulation.
It uses a single N-channel DMOS power switch with 0.9V typical saturation voltage at 1A, and features TTL-compatible ON/OFF control with 50 μA standby current. Feedback is internally referenced to 1.23V, enabling stable regulation across −40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V ±4% over 0.2–1A load and 18–60V input - ensures stable rail for analog sensors or logic interfaces without external feedback resistors. |
| Input Voltage Range | 4.75V to 60V - supports wide-input industrial, automotive, and telecom applications without input pre-regulation. |
| Output Current | 1A continuous - sufficient to power microcontrollers, op-amps, or small FPGAs directly from high-voltage sources. |
| Switching Frequency | 52 kHz fixed - enables use of low-cost, standard inductors (e.g., 330 µH) and simplifies EMI filtering vs. higher-frequency alternatives. |
| Efficiency | 88% at VIN = 18V, IOUT = 1A - reduces thermal load vs. linear regulators; eliminates need for heatsink in many PCB layouts. |
| Standby Current | 50 µA typical with ON/OFF pin high - enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Thermal Protection | Internal thermal shutdown with automatic recovery - prevents latch-up during overload or poor heatsinking conditions. |
Pinout & Package
LM2575HVSX-15/NOPB is housed in a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), featuring an exposed thermal pad for enhanced heat dissipation (θJA = 37°C/W with 1 in² copper area).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Input (VIN) | Main power input | Accepts 4.75–60V; requires local 100 µF/75V aluminum electrolytic bypass capacitor. |
| 2 - Output (VOUT) | Regulated DC output | Delivers fixed 15V; connects to 330 µF/25V output capacitor and catch diode anode. |
| 3 - Ground (GND) | Power and signal reference | Common return for input/output capacitors, feedback network, and thermal pad; must be low-inductance connection. |
| 4 - Feedback (FB) | Voltage sense input | Internally tied to 15V output; not accessible - fixed-output version has no external feedback path. |
| 5 - ON/OFF | Enable/disable control | TTL-compatible; <0.8V disables regulator (50 µA standby); >2.2V enables normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1A DMOS switch | Eliminates external MOSFET and driver; 0.9V typical VDS(sat) minimizes conduction loss at full load. |
| Fixed-frequency PWM control | 52 kHz oscillator enables predictable EMI spectrum and simplifies filter design using off-the-shelf inductors. |
| Self-protecting architecture | Cycle-by-cycle current limit + thermal shutdown prevent damage during short-circuit or overheating events. |
| Minimal BOM requirement | Only four external components needed: input cap, output cap, catch diode, and inductor - accelerates prototyping. |
| High-voltage input support | 60V absolute max rating allows direct interface with 48V PoE, industrial 24/48V buses, or automotive transients. |
Applications
| Industrial Power Supply | Telecom Line Card |
|---|---|
Use Scenario: Generating stable 15V rail from 48V backplane in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated power to analog front-end circuitry and isolated communication interfaces. Use Value: High efficiency (88%) reduces board-level heat generation; 60V input withstands 48V system surges without derating. |
Use Scenario: Local 15V supply for line interface ICs and codec circuits on telecom access equipment cards. IC Role / Device Role / Timing Role: Point-of-load (POL) buck converter providing clean, low-noise power independent of main system rail fluctuations. Use Value: Fixed 15V output eliminates feedback resistor layout sensitivity; TO-263 package supports automated assembly and thermal reliability. |
| Test Equipment Power Module | LED Driver Bias Supply |
Use Scenario: Compact 15V source for precision DACs and op-amp biasing in portable multimeters and calibrators. IC Role / Device Role / Timing Role: Efficient pre-regulator feeding low-dropout linear regulators to achieve ultra-low noise and ripple. Use Value: 50 µA standby current extends battery life in handheld instruments; ±4% output tolerance meets metrology-grade stability needs. |
Use Scenario: Constant-voltage bias for high-brightness LED arrays requiring 15V forward voltage in signage or lighting controllers. IC Role / Device Role / Timing Role: Non-isolated DC-DC stage supplying stable bus voltage to downstream constant-current LED drivers. Use Value: Integrated protection prevents catastrophic failure during LED string open/short faults; 1A output supports multi-string configurations. |
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 | TO-220 through-hole package; θJA = 65°C/W (no heatsink); same electrical specs and pinout. | Preferred for prototyping, manual assembly, or legacy through-hole designs where thermal mass of PCB is limited. | Select when mechanical mounting or hand-soldering is required; verify thermal margin with ambient temperature and airflow. |
| LM2596S-15 | Higher 150 kHz switching frequency; 3A output rating; different pinout and external compensation requirements. | Suitable for space-constrained designs needing smaller magnetics, but requires redesign of inductor, diode, and feedback loop. | Choose only if higher current or smaller footprint is critical; not drop-in compatible due to differing control architecture and layout. |
Compared with LM2575T-15 and LM2596S-15, the LM2575HVSX-15/NOPB offers superior thermal performance in surface-mount applications via its exposed-pad TO-263 package, while maintaining identical functional behavior and pin compatibility with the TO-220 variant - making it ideal for volume production with automated reflow and thermal management demands.
Availability
LM2575HVSX-15/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, test equipment modules, and LED bias applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM2575HVSX-15/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 series was designed specifically for rugged industrial and telecom applications demanding wide-input voltage operation, integrated protection, and minimal external component count - positioning LM2575HVSX-15/NOPB as a robust, cost-effective buck solution for harsh environments.
FAQ
What is the maximum input voltage rating for LM2575HVSX-15/NOPB?
The LM2575HVSX-15/NOPB has an absolute maximum input voltage rating of 63V and a recommended operating maximum of 60V. This high-voltage capability enables direct use with 48V industrial buses and telecom power systems without external pre-regulation, distinguishing it from standard LM2575 variants rated for 40V max input.
Does LM2575HVSX-15/NOPB require external feedback resistors?
No. The LM2575HVSX-15/NOPB is a fixed-output version with internal feedback network set to 15V. Pin 4 (FB) is not externally accessible and is internally connected - eliminating resistor selection, placement, and tolerance errors. This simplifies design and improves long-term output stability compared to adjustable versions.
What package type does LM2575HVSX-15/NOPB use, and how does it affect thermal performance?
The LM2575HVSX-15/NOPB uses a 5-lead DDPAK/TO-263 surface-mount package (KTT0005B) with an exposed thermal pad. With 1 in² of PCB copper area, its junction-to-ambient thermal resistance is 37°C/W - significantly lower than the 65°C/W of the TO-220 variant - enabling 1A operation at higher ambient temperatures without a heatsink.
Can LM2575HVSX-15/NOPB be used in battery-powered applications?
Yes. The LM2575HVSX-15/NOPB supports TTL-compatible ON/OFF control with only 50 µA typical standby current when disabled. This makes it suitable for battery-backed systems requiring low-quiescent-power sleep modes, such as portable test gear or remote sensors - provided the battery voltage remains within the 4.75–60V operating range.
What is the output voltage tolerance of LM2575HVSX-15/NOPB over temperature and load?
The LM2575HVSX-15/NOPB guarantees ±4% output voltage tolerance across the full operating temperature range (−40°C to +125°C junction) and load current range (0.2A to 1A), with typical room-temperature accuracy of ±1%. This specification is explicitly confirmed in the Electrical Characteristics table for LM2575HV-15 under "VOUT Output Voltage" conditions.
LM2575HVSX-15/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
LM2575HVSX-15/NOPB FAQ
1.How can I place an order for LM2575HVSX-15/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVSX-15/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 LM2575HVSX-15/NOPB reliable?
The price and inventory of LM2575HVSX-15/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVSX-15/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVSX-15/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVSX-15/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVSX-15/NOPB?
LM2575HVSX-15/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVSX-15/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 LM2575HVSX-15/NOPB?
For technical support, including LM2575HVSX-15/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVSX-15/NOPB requirements.
6.How does Aetrix verify that LM2575HVSX-15/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVSX-15/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 LM2575HVSX-15/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVSX-15/NOPB?
All LM2575HVSX-15/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVSX-15/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 LM2575HVSX-15/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVSX-15/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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