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Texas Instruments LM2575HVS-12/NOPB
- Part No.:
- LM2575HVS-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2575HVS-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:956
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Product details
Overview
LM2575HVS-12/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with fixed 12V output, 60V maximum input voltage rating, 52 kHz fixed-frequency internal oscillator, and integrated thermal shutdown and cycle-by-cycle current limiting. It operates across −40°C to +125°C junction temperature and delivers ±4% output voltage accuracy under full line and load conditions - used in industrial power supplies requiring high-input-voltage DC-DC conversion.
For engineers reviewing the LM2575HVS-12/NOPB datasheet, LM2575HVS-12/NOPB pinout, LM2575HVS-12/NOPB application, or LM2575HVS-12/NOPB equivalent, this device serves as a high-efficiency replacement for linear regulators in space-constrained 12V rail generation, pre-regulation, and on-card buck conversion where input voltages exceed 40V.
Technical Context
The LM2575HVS-12/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 minimizes EMI filtering complexity while maintaining high efficiency across 15–60V input range.
It features TTL-compatible ON/OFF control (50 μA standby current), 1.23V internal reference for output regulation, and built-in cycle-by-cycle current limit (1.7–3.2A peak) plus thermal shutdown. The HV variant's 60V input rating supports direct connection to unregulated 48V telecom or industrial bus rails without external pre-regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±4% over 0.2–1A load and 15–60V input - ensures stable downstream logic or analog supply without external resistive divider. |
| Input Voltage Range | 4.75V to 60V - supports wide-range industrial, telecom, and automotive battery-supplied systems without input pre-regulation. |
| Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and interface ICs directly from high-voltage rails. |
| Switching Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors (e.g., 330 µH) and simplifies EMI filter design. |
| Efficiency | 88% at VIN = 15V, IOUT = 1A - reduces thermal load vs. linear regulators and eliminates need for large heatsinks in most applications. |
| Thermal Resistance | θJA = 37°C/W (DDPAK/TO-263 package with ≥1 in² copper) - enables 1A operation at +85°C ambient without forced air or external heatsink. |
| Shutdown Current | 50 µA typical - allows ultra-low-power system-level sleep modes when enabled via TTL-level control signal. |
Pinout & Package
LM2575HVS-12/NOPB uses a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), thermally enhanced for high-power density PCB layouts. The exposed metal tab is electrically connected to Pin 2 (Output) and must be soldered to a thermal pad for optimal heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: Input | VIN supply input | Accepts 4.75–60V DC; requires local 100 µF/75V aluminum electrolytic bypass capacitor within 5 mm. |
| 2: Output | Regulated 12V switching node | Drives external inductor and catch diode; connects to thermal pad for heatsinking; no internal connection to ground. |
| 3: Ground | Power and signal reference | Common return for internal circuitry and external components; must be tied to low-impedance ground plane. |
| 4: Feedback | Output voltage sense input | Internally tied to 12V output; not accessible - fixed-output version omits external resistor network. |
| 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 |
|---|---|
| Integrated thermal shutdown | Activates at ~150°C junction temperature and auto-recovers after cooldown - prevents permanent damage during overload or poor heatsinking. |
| Cycle-by-cycle current limiting | Clamps peak switch current between 1.7A (min) and 3.2A (max) - protects internal transistor and external inductor during short-circuit or startup surge. |
| Fixed 52 kHz oscillator | Eliminates need for external timing components and ensures predictable EMI profile - simplifies compliance testing and layout. |
| High-voltage input capability | Rated for 60V absolute maximum input - enables direct integration into 48V systems without front-end buck or Zener clamp. |
| TTL shutdown interface | Supports system-level power sequencing with <10 µA input leakage - compatible with microcontroller GPIO without level-shifting. |
Applications
| Industrial Power Supply | Telecom Line Card |
|---|---|
|
Use Scenario: Generating isolated 12V rail from unregulated 48V backplane in modular PLC I/O modules. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing main 12V logic supply with built-in fault protection. Use Value: Eliminates need for discrete MOSFET driver and external current-sense circuitry while sustaining 1A load at 88% efficiency. |
Use Scenario: Local 12V conversion on high-density telecom line cards powered from -48V nominal bus (with polarity inversion). IC Role / Device Role / Timing Role: Step-down regulator converting inverted +48V to 12V for FPGA I/O banks and SerDes power. Use Value: Withstands 60V transients common on telecom buses and maintains regulation during brownout events down to 15V input. |
| Automotive Body Control | Test Equipment Power |
|
Use Scenario: Deriving 12V auxiliary supply from vehicle battery (9–16V nominal, up to 60V load dump) for infotainment sub-systems. IC Role / Device Role / Timing Role: High-input-voltage buck converter with thermal foldback for engine bay-mounted electronics. Use Value: Survives ISO 7637-2 pulse 5a (60V/100ms) without latch-off and resumes regulation after transient clears. |
Use Scenario: Programmable bench power supply module delivering stable 12V/1A output with remote ON/OFF control. IC Role / Device Role / Timing Role: Core regulated output stage controlled via microcontroller GPIO for sequenced power-up. Use Value: 50 µA standby current enables low-power sleep mode; fixed 12V output avoids calibration drift from resistor tolerance. |
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-12 | TO-220 package (θJA = 45°C/W), 40V max input, same electrical specs - lower thermal performance and no surface-mount compatibility. | Suitable for prototyping or low-volume through-hole designs; not recommended for high-density or thermally constrained PCBs. | Select LM2575T-12 only if manual assembly, socketing, or legacy TO-220 footprint reuse is required. |
| MP1584EN-LF-Z | 3A output, 45V max input, 1.5 MHz switching, adjustable output - higher current, faster switching, but requires external feedback resistors and compensation. | Better suited for compact, high-efficiency designs needing >1A or dynamic output adjustment; adds design complexity. | Choose MP1584EN-LF-Z when board space is limited, higher output current is needed, or programmability justifies added BOM and layout effort. |
Compared with LM2575T-12, LM2575HVS-12/NOPB offers superior thermal performance and surface-mount reliability; compared with MP1584EN-LF-Z, it trades higher integration and simpler design for lower current and fixed output - ideal for cost-sensitive, thermally demanding 12V buck applications.
Availability
LM2575HVS-12/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control units, and test equipment requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for LM2575HVS-12/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 product line was designed specifically for high-input-voltage DC-DC conversion in industrial, telecom, and automotive environments where robustness, simplicity, and thermal resilience are critical.
FAQ
What is the maximum input voltage rating for LM2575HVS-12/NOPB?
The LM2575HVS-12/NOPB has an absolute maximum input voltage rating of 63V and an operating input voltage range of 4.75V to 60V. This high-voltage capability allows direct connection to 48V telecom buses or automotive systems experiencing load-dump transients, making LM2575HVS-12/NOPB suitable for ruggedized power designs where input surges are expected.
Does LM2575HVS-12/NOPB require external feedback resistors?
No, LM2575HVS-12/NOPB is a fixed-output version with internal resistor divider set to 12V; the Feedback (Pin 4) is not externally accessible. Unlike the adjustable LM2575HV-ADJ variant, LM2575HVS-12/NOPB eliminates external resistor selection, tolerance errors, and layout sensitivity - ensuring consistent 12V output across temperature and production lots.
What package type does LM2575HVS-12/NOPB use, and how is thermal management handled?
LM2575HVS-12/NOPB uses a 5-lead DDPAK/TO-263 surface-mount package (KTT0005B) with an exposed thermal pad electrically connected to Pin 2 (Output). Effective thermal management requires soldering the pad to ≥1 in² of PCB copper, achieving θJA = 37°C/W - enabling full 1A output at +85°C ambient without additional heatsinking.
Can LM2575HVS-12/NOPB be synchronized to an external clock?
No, LM2575HVS-12/NOPB features a fixed 52 kHz internal oscillator with no synchronization input. Its frequency is trimmed and unadjustable; external clock injection is not supported. For synchronized multi-rail systems, designers must accept inherent frequency offset or select alternative regulators with SYNC pin functionality.
What protection features are integrated into LM2575HVS-12/NOPB?
LM2575HVS-12/NOPB integrates cycle-by-cycle current limiting (1.7–3.2A peak), thermal shutdown (~150°C), and TTL-compatible ON/OFF control with 50 µA standby current. These features provide autonomous fault recovery during overload, short-circuit, or overheating - eliminating need for external current-sense amplifiers or thermal monitors in most applications.
LM2575HVS-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- 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):
- 12V
- 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)
LM2575HVS-12/NOPB FAQ
1.How can I place an order for LM2575HVS-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVS-12/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 LM2575HVS-12/NOPB reliable?
The price and inventory of LM2575HVS-12/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVS-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVS-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVS-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVS-12/NOPB?
LM2575HVS-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVS-12/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 LM2575HVS-12/NOPB?
For technical support, including LM2575HVS-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVS-12/NOPB requirements.
6.How does Aetrix verify that LM2575HVS-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVS-12/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 LM2575HVS-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVS-12/NOPB?
All LM2575HVS-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVS-12/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 LM2575HVS-12/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVS-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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