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Texas Instruments LM2575HVMX-5.0/NOPB
- Part No.:
- LM2575HVMX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2575HVMX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,792
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Product details
Overview
LM2575HVMX-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, 52 kHz internal oscillator, ±4% output voltage tolerance over line/load/temperature, and integrated thermal shutdown and cycle-by-cycle current limiting - used in industrial power supplies requiring high-efficiency DC-DC conversion from unregulated 24–48V rails.
For engineers reviewing the LM2575HVMX-5.0/NOPB datasheet, LM2575HVMX-5.0/NOPB pinout, LM2575HVMX-5.0/NOPB application, or LM2575HVMX-5.0/NOPB equivalent, key selection criteria include input voltage range up to 60V, TO-263-5 package thermal performance (θJA = 37°C/W with 1 in² copper), 1A continuous output capability, and compatibility with standard off-the-shelf inductors and Schottky catch diodes.
Technical Context
The LM2575HVMX-5.0/NOPB implements a fixed-frequency pulse-width modulation (PWM) buck topology with internal 52 kHz oscillator and integrated N-channel DMOS power switch. It uses voltage-mode control with internal frequency compensation, eliminating external loop compensation components.
Regulation is achieved via feedback of the output voltage to an internal error amplifier comparing against a 1.23V reference; the ON/OFF pin provides TTL-compatible shutdown with 50 μA standby current. Protection includes thermal shutdown at ~150°C junction temperature and peak current limiting at 1.7–3.2A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over 8V–60V input, 0.2A–1A load, −40°C to +125°C |
| Max Input Voltage | 60V - supports 48V nominal industrial and telecom input rails with margin |
| Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and logic rails |
| Oscillator Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors (e.g., 330 µH) |
| Efficiency | 77% at VIN = 12V, IOUT = 1A - reduces heat sink requirements vs. linear regulators |
| Thermal Resistance | θJA = 37°C/W (DDPAK/TO-263 with 1 in² PCB copper) - enables 1A operation without external heatsink |
| Shutdown Current | 50 µA typical - suitable for low-power standby modes in battery-backed systems |
Pinout & Package
LM2575HVMX-5.0/NOPB is housed in a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), featuring exposed thermal pad for enhanced PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Input | Unregulated DC input supply | Accepts 8–60V; requires local 47–100 µF aluminum/tantalum bypass capacitor |
| 2 - Ground | Power and signal reference | Must connect to large PCB copper pour; serves as return path for switch and feedback currents |
| 3 - Output | Regulated 5.0V switching node | Drives external inductor; high dI/dt node requiring short, low-inductance routing |
| 4 - Feedback | Output voltage sensing input | Internally referenced to 1.23V; not connected in fixed-output versions (NC) |
| 5 - ON/OFF | TTL-compatible enable control | Logic high (>2.2V) enables regulation; logic low (<0.8V) disables with 50 µA standby current |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Switch | N-channel DMOS transistor with 0.9V saturation voltage at 1A - minimizes conduction loss |
| Self-Protected Operation | Combined thermal shutdown and cycle-by-cycle current limiting - prevents damage during overload or short-circuit |
| Minimal External Components | Only 4 required: input cap, output cap, inductor, catch diode - simplifies layout and BOM |
| Standard Inductor Compatibility | Optimized for 52 kHz operation - supports widely available off-the-shelf 330 µH shielded inductors (e.g., PE-52627) |
| High-Voltage Input Support | 60V absolute max input - enables direct regulation from 48V PoE, industrial 24/48V, or automotive 36V transients |
Applications
| Industrial PLC Power Supply | 48V Telecom Pre-Regulator |
|---|---|
Use Scenario: Providing stable 5V rail for CPU, FPGA, and I/O peripherals inside DIN-rail mounted programmable logic controllers operating from 24–48V DC field power. IC Role / Device Role / Timing Role: Primary step-down regulator converting unregulated 48V input to isolated 5V logic supply with ripple <50 mVPP. Use Value: Eliminates need for bulky linear pre-regulators; achieves >75% efficiency at full load while maintaining thermal safety on compact PCBs. | Use Scenario: Generating intermediate 5V bus from 48V central office supply in VoIP gateways and remote radio units before LDO post-regulation. IC Role / Device Role / Timing Role: High-input-voltage buck converter delivering 1A at 5V with immunity to 60V surges per GR-1089. Use Value: Withstands telecom line faults and lightning-induced transients up to 60V without derating or external clamping. |
| On-Card DC-DC Converter | Positive-to-Negative Inverter |
Use Scenario: Local point-of-load regulation on dense embedded boards where space prohibits external DC-DC modules. IC Role / Device Role / Timing Role: Compact surface-mount buck regulator using TO-263 footprint to minimize board area and layer count. Use Value: TO-263 package with thermal pad delivers 1A output in <1 cm² footprint, enabling integration directly adjacent to SoC or MCU. | Use Scenario: Generating −5V rail from +5V or +12V supply for op-amp biasing or analog sensor interfaces. IC Role / Device Role / Timing Role: Configured in inverting buck-boost topology using same external components as buck mode. Use Value: Leverages identical IC and BOM across multiple rail types - reduces inventory and qualification effort for dual-polarity analog subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575T-5.0 | TO-220 package; θJA = 45°C/W (with 4 in² copper); max input 40V | Suitable for lower-input-voltage, through-hole designs with heatsink mounting | Select when mechanical constraints favor through-hole assembly or input ≤40V suffices |
| LM2596S-5.0 | 1.5A rating; 150 kHz switching; adjustable soft-start; different pinout and compensation | Better suited for higher-current or noise-sensitive applications requiring faster transient response | Select when >1A output or reduced output capacitor size is required |
Compared with LM2575T-5.0, LM2575HVMX-5.0/NOPB supports 20V higher input voltage and offers superior thermal performance in surface-mount layouts; compared with LM2596S-5.0, it trades higher current and frequency for proven robustness, simpler design, and lower EMI in industrial environments.
Availability
LM2575HVMX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and embedded power supply designs requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for LM2575HVMX-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 broad industrial and automotive qualification.
The LM2575HV product line delivers rugged, easy-to-use buck regulators for high-input-voltage applications where reliability, thermal simplicity, and minimal external components are critical - targeting industrial controls, telecom power, and harsh-environment electronics.
FAQ
What is the maximum input voltage rating for LM2575HVMX-5.0/NOPB?
The LM2575HVMX-5.0/NOPB has a maximum input voltage rating of 60V, confirmed in the Absolute Maximum Ratings table of the official TI datasheet (SNVS106E). This high-voltage capability allows direct regulation from 48V industrial or telecom supplies with headroom for transients. Operation above 60V risks permanent damage; sustained input above 40V requires verification of thermal performance under actual load conditions using the θJA = 37°C/W specification.
Does LM2575HVMX-5.0/NOPB require external compensation components?
No, LM2575HVMX-5.0/NOPB does not require external compensation components. Its voltage-mode control architecture includes fully integrated frequency compensation, enabling stable operation with only four external components: input capacitor, output capacitor, power inductor, and catch diode. This is explicitly stated in the "Features" section and verified in the Typical Application schematic (Figure 25) of the TI datasheet, where no compensation network appears around the feedback path.
What package type is used for LM2575HVMX-5.0/NOPB and how does it affect thermal performance?
LM2575HVMX-5.0/NOPB uses the 5-lead DDPAK/TO-263 surface-mount package (TI package code KTT0005B), which features an exposed thermal pad. With 1 square inch of PCB copper connected to the pad, its junction-to-ambient thermal resistance is 37°C/W - significantly lower than the TO-220 version's 45°C/W. This enables 1A continuous operation without an external heatsink under typical ambient conditions, as validated in the Thermal Characteristics table of SNVS106E.
Can LM2575HVMX-5.0/NOPB be used in a buck-boost (inverting) configuration?
Yes, LM2575HVMX-5.0/NOPB can be configured as a positive-to-negative buck-boost converter, as explicitly listed under "Applications" in the TI datasheet. The circuit reuses the same four external components (inductor, diode, input/output capacitors) but rearranges connections to generate a negative output voltage. Output magnitude remains regulated at 5.0V, though polarity is inverted; efficiency and ripple characteristics match those of the standard buck configuration per test data in Figure 24.
What is the feedback voltage reference and is it accessible on LM2575HVMX-5.0/NOPB?
The internal feedback voltage reference of LM2575HVMX-5.0/NOPB is 1.230V ±1.5%, measured at the FB pin under specified conditions. However, this pin is internally connected and not brought out on the fixed-output LM2575HVMX-5.0/NOPB variant - it is a no-connect (NC) terminal per the Connection Diagrams (Figure 8) and Electrical Characteristics tables. Only adjustable versions (e.g., LM2575HVMX-ADJ) expose the FB pin for external resistor programming.
LM2575HVMX-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- 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:
- 24-SOIC
LM2575HVMX-5.0/NOPB FAQ
1.How can I place an order for LM2575HVMX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVMX-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 LM2575HVMX-5.0/NOPB reliable?
The price and inventory of LM2575HVMX-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 LM2575HVMX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVMX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVMX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVMX-5.0/NOPB?
LM2575HVMX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVMX-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 LM2575HVMX-5.0/NOPB?
For technical support, including LM2575HVMX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVMX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2575HVMX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVMX-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 LM2575HVMX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVMX-5.0/NOPB?
All LM2575HVMX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVMX-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 LM2575HVMX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVMX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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