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Texas Instruments LM2575HVM-ADJ/NOPB
- Part No.:
- LM2575HVM-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2575HVM-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,720
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Product details
Overview
LM2575HVM-ADJ/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in a 5-lead DDPAK/TO-263 surface-mount package, featuring adjustable output (1.23V–37V), 52 kHz fixed-frequency operation, and integrated thermal shutdown and cycle-by-cycle current limiting. It delivers high-efficiency DC/DC conversion for industrial power supplies requiring stable 1A output with wide input range.
For engineers reviewing the LM2575HVM-ADJ/NOPB datasheet, LM2575HVM-ADJ/NOPB pinout, LM2575HVM-ADJ/NOPB application, or LM2575HVM-ADJ/NOPB equivalent, this device serves as a high-efficiency replacement for linear regulators in space-constrained, thermally demanding applications where input voltage may reach 60V and output must be precisely programmed via external resistors.
Technical Context
The LM2575HVM-ADJ/NOPB implements a fixed-frequency PWM buck topology with internal 52 kHz oscillator, N-channel DMOS output switch, and feedback-controlled error amplifier. Its adjustable version uses a precision 1.23V reference at the FB pin to set output via R1/R2 divider, enabling programmable regulation across 1.23V–37V (up to 57V for HV variants under overline conditions).
It features TTL-compatible ON/OFF control (50 μA standby current), built-in thermal shutdown (150°C junction limit), and peak current limiting (1.7–3.2 A). The DDPAK/TO-263 package provides θJA = 37°C/W with ≥1 in² copper area, supporting 1A continuous load without external heat sink under typical PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous - supports full-load operation without derating in standard layouts with adequate copper pour. |
| Input Voltage Range | 4.75V to 60V - enables direct regulation from 48V telecom rails, automotive battery transients, or industrial 24/48V systems. |
| Output Voltage Range | 1.23V to 37V (±4%) - set externally via resistor divider; 57V max possible with HV rating margin under transient conditions. |
| Switching Frequency | 52 kHz (±10%) - fixed internal oscillator simplifies EMI filtering and allows use of low-cost, high-saturation-current inductors. |
| Feedback Reference | 1.230 V (±2.2% over temp) - high-precision bandgap reference enables accurate output programming with 0.1% resistors. |
| Thermal Resistance | θJA = 37°C/W - achieved with ≥1 in² PCB copper area; enables 1A operation at +85°C ambient without heatsink. |
| Standby Current | 50 μA typical - ultra-low quiescent draw during shutdown, suitable for battery-backed or always-on systems. |
Pinout & Package
LM2575HVM-ADJ/NOPB uses a 5-lead DDPAK/TO-263 surface-mount package (TI package code KTT0005B) with exposed thermal pad for enhanced heat dissipation. Pin 1 is Input (VIN), Pin 2 is Output (OUT), Pin 3 is Ground (GND), Pin 4 is Feedback (FB), and Pin 5 is ON/OFF control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Main power input | Accepts 4.75–60V DC; requires local 100 μF/75V electrolytic bypass capacitor to suppress switching noise and supply ripple. |
| 2 - OUT | Switched output node | Drives external catch diode and output inductor; connects to LC filter network delivering regulated DC to load. |
| 3 - GND | Power and signal reference | Must be connected to low-impedance ground plane; shared return path for input cap, output cap, and feedback network. |
| 4 - FB | Feedback sense input | Monitors output via R1/R2 divider; 1.23V reference sets VOUT = 1.23 × (1 + R2/R1); sensitive to noise-requires short trace routing. |
| 5 - ON/OFF | Enable/disable control | TTL-compatible logic input: <1.0V disables (50 μA standby), >2.2V enables; open-circuit defaults to enabled state. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated thermal shutdown | Automatically disables output at ~150°C junction temperature, preventing damage during overload or poor heatsinking. |
| Cycle-by-cycle current limiting | Clips peak switch current between 1.7A (min) and 3.2A (max), protecting internal DMOS FET during short-circuit or startup. |
| Fixed 52 kHz oscillator | Eliminates need for external timing components; ensures predictable EMI profile and compatibility with standard off-the-shelf inductors. |
| Low-ESR capacitor support | Stable with aluminum electrolytics (e.g., 330 μF/25V); no requirement for expensive tantalum or polymer capacitors. |
| TTL shutdown interface | Enables seamless integration into microcontroller-based power sequencing with <10 μA input leakage and clean 50 μA standby draw. |
Applications
| Industrial Power Supply | Automotive Subsystem Regulator |
|---|---|
|
Use Scenario: On-board 12V-to-5V/3.3V conversion for PLC I/O modules operating in harsh environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, efficient, and thermally robust DC/DC conversion with no external controller required. Use Value: Eliminates linear regulator heat sink while maintaining ±4% output accuracy across −40°C to +125°C junction range and 40V–60V input transients. |
Use Scenario: Powering infotainment MCU cores and peripherals from vehicle battery (9V–16V nominal, up to 60V load dump). IC Role / Device Role / Timing Role: High-voltage input buck converter with enable control synchronized to ignition status and wake-up signals. Use Value: Withstands ISO 7637-2 pulse 5a (60V/100ms) without latch-off; 50 μA shutdown current extends battery life during vehicle sleep mode. |
| Programmable Lab Power Module | Field-Deployable Sensor Node PSU |
|
Use Scenario: Bench-top adjustable DC source (1.23V–30V) with digital voltage setting via DAC-controlled R2 network. IC Role / Device Role / Timing Role: Adjustable-output switching regulator core, paired with precision resistive divider and remote sensing traces. Use Value: Delivers 1A at <1% ripple using standard 470 μF/35V electrolytic and 470 μH shielded inductor-no custom magnetics needed. |
Use Scenario: Solar-charged remote sensor node requiring long-life operation from 12V lead-acid or LiFePO₄ battery. IC Role / Device Role / Timing Role: Main system regulator enabling low-power sleep states and fast wake-up via ON/OFF pin control. Use Value: Achieves >85% efficiency at 100 mA load and maintains regulation down to 4.75V input-extending usable battery range by >20% vs. LDO. |
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 through-hole package; higher θJA = 65°C/W (no heatsink); same electrical specs and pinout. | Suitable for prototyping, low-volume assembly, or legacy through-hole designs; not recommended for high-density SMT production. | Select LM2575T-ADJ only when manual soldering or socket mounting is required; LM2575HVM-ADJ/NOPB offers superior thermal performance and automated assembly compatibility. |
| MP1584EN-LF-Z | 3A rated, 1.5 MHz switching frequency, smaller solution size; requires external compensation; no built-in thermal shutdown latch. | Better for compact, high-efficiency designs needing >1A or faster transient response; lacks HV input rating (max 28V). | Choose MP1584EN-LF-Z when board space is critical and input stays below 28V; LM2575HVM-ADJ/NOPB remains preferred for 40–60V input and ruggedized industrial use. |
Compared with LM2575T-ADJ and MP1584EN-LF-Z, the LM2575HVM-ADJ/NOPB uniquely balances 60V HV tolerance, SMT manufacturability, integrated protection, and proven reliability in mission-critical 1A buck applications-without requiring layout redesign or external fault management circuitry.
Availability
LM2575HVM-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive subsystems, programmable lab equipment, and field-deployable sensor nodes requiring stable component supply and long-term lifecycle support.
Supply support for LM2575HVM-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 high-reliability power conversion solutions.
The LM2575 series was designed specifically for cost-sensitive, high-efficiency buck conversion in industrial, automotive, and telecom infrastructure-replacing linear regulators while minimizing thermal design complexity and external component count.
FAQ
What is the maximum input voltage rating for LM2575HVM-ADJ/NOPB?
The LM2575HVM-ADJ/NOPB has an absolute maximum input voltage of 63V and a recommended operating maximum of 60V. This HV rating enables reliable operation in 48V industrial systems and automotive load-dump scenarios. Operation above 60V risks permanent damage, even momentarily. Always include input overvoltage clamping if transient spikes exceed this limit.
Can LM2575HVM-ADJ/NOPB be used with ceramic output capacitors?
Yes, LM2575HVM-ADJ/NOPB can operate with ceramic output capacitors, but stability must be verified. The original design targets aluminum electrolytics (e.g., 330 μF, 25V) with ~50 mΩ ESR. Low-ESR ceramics may cause ringing or oscillation unless a small series resistor (~50–100 mΩ) is added. TI's AN-1188 recommends verifying loop response with network analyzer or load-step testing before finalizing ceramic-only designs.
What is the minimum output voltage achievable with LM2575HVM-ADJ/NOPB?
The LM2575HVM-ADJ/NOPB achieves a minimum regulated output voltage of 1.23V - equal to its internal feedback reference voltage. This occurs when R1 is open and R2 is 0Ω (direct connection of FB to OUT). Output voltages below 1.23V are not supported, as the error amplifier cannot drive the output lower than the reference threshold.
How does the ON/OFF pin function on LM2575HVM-ADJ/NOPB?
The ON/OFF pin (Pin 5) provides TTL-compatible enable control: driving it below 1.0V disables the regulator (50 μA standby current), while pulling it above 2.2V enables normal operation. Leaving it unconnected defaults to enabled. The pin draws ≤30 μA and tolerates up to VIN voltage, allowing direct interfacing with microcontrollers or logic gates without level shifting.
Is LM2575HVM-ADJ/NOPB RoHS-compliant and lead-free?
Yes, LM2575HVM-ADJ/NOPB is RoHS-compliant and lead-free, as indicated by the "/NOPB" suffix per Texas Instruments' packaging nomenclature. It meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) and is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards. Full compliance documentation is available in TI's official product folder and material declarations.
LM2575HVM-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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
LM2575HVM-ADJ/NOPB FAQ
1.How can I place an order for LM2575HVM-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVM-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 LM2575HVM-ADJ/NOPB reliable?
The price and inventory of LM2575HVM-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 LM2575HVM-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVM-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVM-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVM-ADJ/NOPB?
LM2575HVM-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVM-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 LM2575HVM-ADJ/NOPB?
For technical support, including LM2575HVM-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVM-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2575HVM-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVM-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 LM2575HVM-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVM-ADJ/NOPB?
All LM2575HVM-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVM-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 LM2575HVM-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVM-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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