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Texas Instruments LM2575HVMX-ADJ/NOPB
- Part No.:
- LM2575HVMX-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2575HVMX-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,698
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Product details
Overview
LM2575HVMX-ADJ/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with adjustable output (1.23V to 37V), 52 kHz fixed-frequency internal oscillator, and wide 4.75V–60V input range. It integrates PWM controller, power switch, and protection circuitry, and is used in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2575HVMX-ADJ/NOPB datasheet, LM2575HVMX-ADJ/NOPB pinout, LM2575HVMX-ADJ/NOPB application, or LM2575HVMX-ADJ/NOPB equivalent, key selection criteria include its HV input rating (60V max), ±4% output voltage tolerance over line/load/temperature, thermal shutdown, cycle-by-cycle current limiting, and TTL-compatible shutdown capability.
Technical Context
The LM2575HVMX-ADJ/NOPB implements a fixed-frequency (52 kHz) current-mode PWM control architecture with an integrated 3.0A peak-current-rated N-channel DMOS power switch. Feedback is taken from the ADJ pin referencing an internal 1.23V precision bandgap reference, enabling output programming via two external resistors.
It features built-in thermal shutdown (150°C junction limit), overcurrent protection with cycle-by-cycle current limiting (1.7–3.2A peak), and low-power standby mode (50 μA typical quiescent current when OFF). Input voltage rejection and load regulation are maintained across −40°C to +125°C operating junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous - supports full-load operation without external current boosting |
| Input Voltage Range | 4.75V to 60V - enables direct use in 48V telecom, automotive battery, and industrial DC bus applications |
| Output Voltage Range | 1.23V to 37V (adjustable) - set by external resistor divider; 1.23V reference tolerance ±1.5% ensures accurate scaling |
| Switching Frequency | 52 kHz ±10% - fixed internal oscillator simplifies EMI filtering and inductor selection |
| Efficiency | Up to 88% at 12V→12V conversion - reduces thermal load vs. linear regulators and eliminates need for large heatsinks |
| Quiescent Current | 5 mA typical operating / 50 μA standby - enables low-power sleep modes in battery-backed systems |
| Protection Features | Thermal shutdown, cycle-by-cycle current limiting, and safe short-circuit recovery - prevents latch-up during fault conditions |
Pinout & Package
LM2575HVMX-ADJ/NOPB is housed in a 5-lead TO-263 (DDPAK) surface-mount package with exposed thermal pad, offering θJA = 37°C/W with ≥1 in² copper area - optimized for high-power density PCB layouts without through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Main power input | Accepts 4.75V–60V DC; requires local 100 μF/75V aluminum electrolytic bypass capacitor |
| 2 - OUTPUT | Switch node | Drives external catch diode and inductor; connects to LC filter output; not regulated voltage |
| 3 - GND | Power and signal ground | Common return for internal circuitry, switch, and feedback; must be low-inductance connection to thermal pad |
| 4 - FEEDBACK (ADJ) | Voltage sense input | Compares divided output against 1.23V internal reference; sets output via R1–R2 divider (R1 = 1k–5kΩ) |
| 5 - ON/OFF | Digital enable/disable control | TTL-compatible logic input: <1.0V = ON, >2.2V = OFF; draws ≤30 μA in shutdown |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.0A peak-current switch | Eliminates need for external MOSFET driver and discrete switch, reducing BOM count and layout complexity |
| Fixed 52 kHz oscillator | Enables consistent EMI profile and predictable inductor sizing using standard off-the-shelf 330–470 μH parts |
| ±4% output voltage tolerance | Guaranteed accuracy over full line (4.75–60V), load (0.2–1A), and temperature (−40°C to +125°C) ranges |
| Requires only 4 external components | Inductor, catch diode, input capacitor, and output capacitor - no compensation network needed |
| TTL shutdown with 50 μA standby | Supports system-level power sequencing and low-power sleep states without auxiliary LDOs or level shifters |
Applications
| Industrial Power Supply | Automotive Subsystem Regulator |
|---|---|
Use Scenario: 24V vehicle battery powers 5V/1A infotainment display module with cold-crank immunity. IC Role / Device Role / Timing Role: Primary buck regulator converting 6V–36V battery range to stable 5V rail. Use Value: 60V input rating withstands load-dump transients; thermal shutdown prevents failure during sustained overloads. |
Use Scenario: On-board diagnostics (OBD-II) interface board derives 3.3V from 12V main bus. IC Role / Device Role / Timing Role: Compact, self-contained step-down converter with minimal footprint and no external compensation. Use Value: TO-263 package enables high-current routing on 2-layer PCB; 52 kHz frequency avoids AM radio band interference. |
| Programmable Lab PSU | Legacy Equipment Retrofit |
Use Scenario: Bench power supply with digitally controlled 1.23–30V output and 1A current limit. IC Role / Device Role / Timing Role: Adjustable-output core regulator with DAC-controlled feedback divider. Use Value: 1.23V reference enables precise output scaling; ±4% tolerance ensures calibration stability across temperature. |
Use Scenario: Replacing obsolete 7805 linear regulator in aging test equipment with higher-efficiency solution. IC Role / Device Role / Timing Role: Drop-in replacement for heat-sensitive 5V/1A rails where board space allows TO-263 footprint. Use Value: Reduces thermal dissipation by >70% vs. linear regulator at 24V input; eliminates need for heatsink retrofit. |
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-ADJ | TO-220 package; lower 40V max input; θJA = 65°C/W (no heatsink); same electrical specs | Suitable for prototyping or low-volume assemblies where through-hole mounting is preferred | Select when mechanical mounting constraints favor TO-220 or when input voltage stays ≤40V |
| LM2596-ADJ | Higher 63V input rating; 150 kHz switching; improved efficiency (up to 92%); requires different inductor/capacitor values | Better suited for compact designs needing higher frequency and lower output ripple | Choose for new designs targeting smaller magnetics and tighter EMI control - not drop-in compatible |
Compared with LM2575T-ADJ, LM2575HVMX-ADJ/NOPB delivers higher input voltage resilience and superior thermal performance on PCBs; versus LM2596-ADJ, it trades higher frequency for proven robustness in noisy industrial environments and simpler external component selection.
Availability
LM2575HVMX-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive subsystems, programmable lab equipment, and legacy equipment retrofits requiring stable component supply and long-term manufacturability.
Supply support for LM2575HVMX-ADJ/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 ICs, with decades of expertise in switching regulator design and manufacturing reliability.
The LM2575HVMX-ADJ/NOPB belongs to TI's SIMPLE SWITCHER® family - engineered for ease-of-use in cost-sensitive, medium-power DC/DC conversion applications where minimal external parts and field-proven ruggedness are critical.
FAQ
What is the maximum input voltage rating for LM2575HVMX-ADJ/NOPB?
The LM2575HVMX-ADJ/NOPB has a maximum input voltage rating of 60V, confirmed in the Absolute Maximum Ratings table of the official SNVS106E datasheet. This HV rating distinguishes it from standard LM2575 variants (40V max) and enables reliable operation in 48V systems, automotive battery interfaces, and industrial DC buses subject to transients.
How is the output voltage set on LM2575HVMX-ADJ/NOPB?
The output voltage of LM2575HVMX-ADJ/NOPB is set using a resistor divider between VOUT and GND, connected to the FEEDBACK (ADJ) pin. The internal 1.23V reference compares against the divided voltage, so VOUT = 1.23V × (1 + R2/R1). R1 is typically 1k–5kΩ; common configurations yield outputs from 1.23V to 37V, with ±4% total tolerance over all conditions.
Does LM2575HVMX-ADJ/NOPB require an external compensation network?
No, LM2575HVMX-ADJ/NOPB does not require external compensation. Its internal frequency compensation is fully integrated and optimized for stable operation with standard 330–470 μH inductors and aluminum electrolytic capacitors. The "requires only 4 external components" claim in the datasheet explicitly excludes compensation parts.
What package type is used for LM2575HVMX-ADJ/NOPB?
LM2575HVMX-ADJ/NOPB uses the 5-lead DDPAK/TO-263 surface-mount package (TI package code KTT0005B), featuring an exposed thermal pad for enhanced heat dissipation. With ≥1 in² of PCB copper area, its junction-to-ambient thermal resistance is 37°C/W - significantly lower than TO-220 alternatives.
Can LM2575HVMX-ADJ/NOPB be used in synchronous rectification designs?
No, LM2575HVMX-ADJ/NOPB is not designed for synchronous rectification. It drives an external Schottky or fast-recovery catch diode (e.g., MBR340) at the OUTPUT pin. The internal switch is a single N-channel DMOS transistor; there is no complementary high-side/low-side gate drive or timing control for a second MOSFET.
LM2575HVMX-ADJ/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:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 57V
- 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-ADJ/NOPB FAQ
1.How can I place an order for LM2575HVMX-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVMX-ADJ/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-ADJ/NOPB reliable?
The price and inventory of LM2575HVMX-ADJ/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-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVMX-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVMX-ADJ/NOPB transactions.
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LM2575HVMX-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVMX-ADJ/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-ADJ/NOPB?
For technical support, including LM2575HVMX-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVMX-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2575HVMX-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVMX-ADJ/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-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVMX-ADJ/NOPB?
All LM2575HVMX-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVMX-ADJ/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-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVMX-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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