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Texas Instruments LM2575HVSX-5.0/NOPB
- Part No.:
- LM2575HVSX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2575HVSX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:495
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Product details
Overview
LM2575HVSX-5.0/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with fixed 5.0V output, 60V maximum input voltage rating, 52 kHz internal oscillator, ±4% output voltage tolerance, and integrated 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 LM2575HVSX-5.0/NOPB datasheet, LM2575HVSX-5.0/NOPB pinout, LM2575HVSX-5.0/NOPB application, or LM2575HVSX-5.0/NOPB equivalent, this page delivers verified specifications, TO-263 package details, real-world use cases, and two validated alternative parts for design-in flexibility under wide-input-voltage DC-DC conversion requirements.
Technical Context
The LM2575HVSX-5.0/NOPB implements a fixed-frequency PWM buck topology with internal NPN switch, feedback comparator, oscillator, and protection circuitry. Its 52 kHz switching frequency enables use of standard off-the-shelf inductors and reduces EMI compared to higher-frequency alternatives.
It operates across 8V–60V input range while maintaining regulated 5.0V ±4% output up to 1A load, with built-in 2.2A peak current limit and thermal shutdown. Standby current is 50 μA typical when TTL-level shutdown is asserted via the ON/OFF pin.
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 rail without external resistor network. |
| Input Voltage Range | 8V to 60V - supports 24V/48V industrial buses, automotive cold-crank, and wide-range unregulated inputs. |
| Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and interface ICs without external pass devices. |
| Switching Frequency | 52 kHz fixed - enables use of low-cost, high-saturation-current inductors (e.g., 330 µH) and simplifies EMI filtering. |
| Efficiency | 77% at 12VIN/5VOUT/1A - reduces thermal load vs. linear regulators; no heatsink required below ~0.5A in TO-263 package. |
| Protection Features | Thermal shutdown + cycle-by-cycle current limiting - prevents damage during overload, short-circuit, or ambient temperature rise. |
| Shutdown Current | 50 μA typical - enables low-power standby modes in battery-backed or energy-sensitive systems. |
Pinout & Package
LM2575HVSX-5.0/NOPB uses the 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 | Voltage supply input | Accepts 8–60V DC; requires local 47–100 µF aluminum electrolytic bypass capacitor. |
| 2 - Output | Regulated 5.0V source | Drives 1A load; connects to catch diode anode and output capacitor positive terminal. |
| 3 - Ground | Power and signal reference | Common return for input/output capacitors, feedback network, and thermal pad connection. |
| 4 - Feedback | Output voltage sense | Internally tied to 5.0V output; not accessible on fixed-version devices - no external resistor needed. |
| 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 |
|---|---|
| High-voltage input support | 60V max input enables direct operation from 48V telecom or industrial rails without pre-regulation. |
| Integrated protection | Thermal shutdown and cycle-by-cycle current limiting eliminate need for external fault management circuitry. |
| Minimal BOM requirement | Only four external components needed: input cap, output cap, catch diode, and inductor - accelerates layout and validation. |
| TTL-compatible shutdown | ON/OFF pin accepts standard logic levels, enabling seamless integration with microcontroller GPIO or system power sequencers. |
| Optimized thermal performance | TO-263 package with exposed pad achieves θJA = 37°C/W (with 1 in² PCB copper), supporting 1A operation without heatsink. |
Applications
| Industrial PLC Power Supply | 48V Telecom Pre-Regulator |
|---|---|
|
Use Scenario: Provides isolated 5V logic rail for I/O modules in programmable logic controllers operating from 24–48V DC field buses. IC Role / Device Role / Timing Role: Primary step-down regulator converting unregulated 48V bus to clean 5V for MCU, FPGA, and communication interfaces. Use Value: Eliminates need for bulky linear regulators and external heat sinks while maintaining ±4% output accuracy across temperature and load. |
Use Scenario: Generates stable 5V intermediate rail in telecom line cards powered by -48V or +48V backplane supplies. IC Role / Device Role / Timing Role: High-input-voltage buck converter delivering 1A at 5V with low standby current during card sleep mode. Use Value: 50 μA shutdown current extends battery backup runtime; 60V rating accommodates transient surges on telecom power planes. |
| Automotive Body Control Module | On-Board DC-DC Converter |
|
Use Scenario: Supplies 5V to microcontrollers and CAN transceivers in body electronics modules exposed to 12V/24V vehicle batteries with cold-crank dips. IC Role / Device Role / Timing Role: Primary DC-DC regulator handling input down to 8V during cranking while sustaining 5V output for critical functions. Use Value: Wide 8–60V input range covers 12V and 24V systems and tolerates load-dump transients up to 60V without latch-up. |
Use Scenario: Replaces inefficient linear regulators on embedded boards where space and thermal constraints prohibit heatsinks. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator delivering 5V/1A directly from board-level unregulated supply. Use Value: TO-263 package enables high-current density layout; fixed 5V output removes trimming resistors and improves long-term stability. |
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 package; 40V max input; higher θJA (65°C/W); no exposed thermal pad. | Suitable for lower-power or prototyping use where heatsinking is acceptable and input voltage stays ≤40V. | Select when mechanical mounting simplicity outweighs thermal performance and high-voltage margin. |
| LM2596SX-5.0 | 1.5A output; 45V max input; 150 kHz switching; requires different inductor/capacitor values. | Better suited for higher-current or smaller-filter designs but lacks 60V input capability. | Choose only if 1A is insufficient and input voltage remains ≤45V; verify loop compensation and layout changes. |
Compared with LM2575T-5.0, LM2575HVSX-5.0/NOPB offers 50% higher input voltage margin and superior thermal performance; versus LM2596SX-5.0, it trades higher current for guaranteed 60V operation and proven 52 kHz stability in legacy industrial designs.
Availability
LM2575HVSX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial PLC power supplies, 48V telecom pre-regulators, automotive body control modules, and on-board DC-DC converters requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2575HVSX-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 reliable, high-volume power IC design.
LM2575HVSX-5.0/NOPB belongs to the SIMPLE SWITCHER® family - engineered for rugged, cost-effective DC-DC conversion in industrial, automotive, and telecom applications where wide input range and minimal external components are critical.
FAQ
What is the absolute maximum input voltage rating for LM2575HVSX-5.0/NOPB?
The absolute maximum input voltage for LM2575HVSX-5.0/NOPB is 63V, with recommended continuous operation up to 60V. This high rating allows direct use in 48V systems and tolerance of transient surges common in industrial and automotive environments. Exceeding 60V during normal operation may compromise long-term reliability even if within absolute maximum limits.
Does LM2575HVSX-5.0/NOPB require external feedback resistors to set the 5.0V output?
No, LM2575HVSX-5.0/NOPB is a fixed-output variant - its 5.0V regulation is implemented internally, and the feedback pin (Pin 4) is not accessible or user-configurable. External resistors are unnecessary, eliminating drift, tolerance, and layout sensitivity associated with adjustable versions.
Can LM2575HVSX-5.0/NOPB be used in parallel for higher current output?
No, LM2575HVSX-5.0/NOPB is not designed for parallel operation. Its internal oscillator and control loop lack synchronization capability, and mismatched duty cycles would cause instability or current imbalance. For >1A requirements, select a higher-current regulator such as LM2596SX-5.0 or implement a discrete current-sharing scheme with external circuitry.
What type of catch diode is recommended for LM2575HVSX-5.0/NOPB in a 1A application?
A Schottky diode rated for ≥1.2A average current and ≥75V reverse voltage is recommended - e.g., SR103 (3A, 30V) or MBR20100CT (20A, 100V). The diode must handle peak currents up to 2.2A and minimize forward voltage drop to preserve efficiency; fast recovery is not required due to the 52 kHz switching frequency.
How does the thermal performance of LM2575HVSX-5.0/NOPB compare to the through-hole LM2575T-5.0 version?
LM2575HVSX-5.0/NOPB in TO-263 achieves θJA = 37°C/W with 1 in² PCB copper, versus 65°C/W for LM2575T-5.0 in TO-220 (no heatsink). This 43% lower thermal resistance allows full 1A operation at higher ambient temperatures without external heatsinking - a key advantage in dense, sealed enclosures.
LM2575HVSX-5.0/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):
- 5V
- 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-5.0/NOPB FAQ
1.How can I place an order for LM2575HVSX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVSX-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 LM2575HVSX-5.0/NOPB reliable?
The price and inventory of LM2575HVSX-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 LM2575HVSX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVSX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVSX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVSX-5.0/NOPB?
LM2575HVSX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVSX-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 LM2575HVSX-5.0/NOPB?
For technical support, including LM2575HVSX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVSX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2575HVSX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVSX-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 LM2575HVSX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVSX-5.0/NOPB?
All LM2575HVSX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVSX-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 LM2575HVSX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVSX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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