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Texas Instruments LM2575HVSX-12/NOPB
- Part No.:
- LM2575HVSX-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2575HVSX-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,529
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Product details
Overview
LM2575HVSX-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 drives 1A loads with ±4% output voltage tolerance across line and load conditions and is used in industrial power supplies requiring high-input-voltage DC-DC conversion.
For engineers reviewing the LM2575HVSX-12/NOPB datasheet, LM2575HVSX-12/NOPB pinout, LM2575HVSX-12/NOPB application, or LM2575HVSX-12/NOPB equivalent, key selection criteria include input voltage range (up to 60V), output accuracy (±4%), thermal performance in TO-263 package, and compatibility with standard off-the-shelf inductors and Schottky catch diodes.
Technical Context
The LM2575HVSX-12/NOPB implements a fixed-frequency pulse-width modulation (PWM) buck topology with internal 52 kHz oscillator and integrated N-channel DMOS power switch. Regulation is achieved via feedback-controlled duty cycle adjustment using an internal error amplifier comparing the output against a 1.23V reference.
It features TTL-compatible ON/OFF control (50 μA standby current), cycle-by-cycle current limiting (1.7–3.2 A peak), and thermal shutdown at ~150°C junction temperature. The device operates over −40°C to +125°C and requires only four external components: input capacitor, output capacitor, inductor, and catch diode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over 15–60 V input and 0.2–1 A load - ensures stable rail for downstream logic or analog circuitry without external resistive divider. |
| Input Voltage Range | 4.75 V to 60 V - supports wide-range industrial, automotive, and telecom inputs including unregulated 48 V systems. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, or 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 vs higher-frequency alternatives. |
| Efficiency | 88% at VIN = 15 V, IOUT = 1 A - reduces thermal load and eliminates need for heatsink in many PCB layouts. |
| Thermal Resistance | θJA = 37 °C/W (TO-263 with 1 in² copper) - enables reliable 1A operation at ambient up to +85°C without forced air. |
| Standby Current | 50 µA typical (TTL shutdown) - supports low-power sleep modes in battery-backed or energy-conscious systems. |
Pinout & Package
LM2575HVSX-12/NOPB is housed in a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), featuring exposed thermal pad for enhanced heat dissipation. Mounting requires soldering the thermal pad to ≥1 in² of PCB copper area to achieve θJA = 37 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Input (VIN) | Main power input | Accepts 4.75–60 V DC; requires local 100 µF/75 V aluminum electrolytic bypass capacitor. |
| 2 - Output (VOUT) | Regulated output node | Delivers 12 V ±4%; connects to 330 µH inductor and Schottky catch diode anode. |
| 3 - Ground (GND) | Power and signal reference | Common return for internal circuitry, feedback network, and thermal pad; must be low-inductance connection. |
| 4 - Feedback (FB) | Voltage sense input | Internally referenced to 1.23 V; unused in fixed-output versions (internally tied to output divider). |
| 5 - ON/OFF | Enable control input | TTL-compatible; <0.8 V disables regulator (50 µA standby), >2.2 V enables normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power switch | DMOS transistor with 0.9 V saturation voltage at 1 A - minimizes conduction loss and simplifies layout vs external MOSFET solutions. |
| Internal frequency compensation | Single-pole compensation - eliminates need for external compensation network, reducing BOM count and design iteration time. |
| Thermal shutdown & current limit | Auto-recovery protection at ~150°C junction temp and 1.7–3.2 A peak switch current - prevents catastrophic failure during overload or short-circuit events. |
| Standard inductor compatibility | Optimized for 330 µH (12 V out) from Pulse Engineering PE-52627, AIE 415-0926, or Renco RL1952 - accelerates design with readily available magnetics. |
| P+ product enhancement tested | Extended reliability screening per TI's P+ standard - suitable for industrial applications requiring long-term stability and field durability. |
Applications
| Industrial Power Supply | Telecom Line Card |
|---|---|
Use Scenario: Converting 48 V backplane supply to regulated 12 V for FPGA I/O banks and peripheral interfaces. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, efficient, and thermally robust 12 V rail. Use Value: 60 V input rating accommodates 48 V nominal with surge margin; 88% efficiency limits board-level heating in dense card layouts. |
Use Scenario: Generating 12 V from −48 V telecom supply (using buck-boost configuration with external inductor/diode). IC Role / Device Role / Timing Role: Core switching controller in positive-to-negative converter topology. Use Value: Fixed 52 kHz frequency enables predictable EMI filter design; internal current limit protects against line transients. |
| On-Board DC-DC Converter | Pre-Regulator for Linear LDO |
Use Scenario: Local 12 V generation on motor control PCBs where 24 V or 36 V battery input varies widely under load. IC Role / Device Role / Timing Role: High-efficiency pre-regulator feeding downstream analog circuits and gate drivers. Use Value: Wide input range (15–60 V) maintains regulation across battery discharge; TO-263 thermal pad sustains 1 A continuously. |
Use Scenario: Reducing 24 V system rail to 13.5 V before linear regulator to minimize LDO power dissipation. IC Role / Device Role / Timing Role: Efficient intermediate-stage buck converter lowering dropout voltage stress on final LDO. Use Value: 88% efficiency at 1 A cuts pre-regulator losses by >70% vs linear solution; 50 µA shutdown enables system-level power gating. |
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 through-hole package; θJA = 45 °C/W (no thermal pad); same electrical specs. | Suitable for prototyping or low-volume assemblies where manual soldering or socketing is preferred. | Select LM2575T-12 when thermal budget allows higher junction rise or when through-hole assembly is required. |
| LM2596SX-12 | Higher 3 A output current; 150 kHz switching frequency; requires smaller inductor (68 µH); ±2% output tolerance. | Better suited for higher-current or space-constrained designs but increases EMI filtering complexity. | Choose LM2596SX-12 only if >1 A load or tighter output tolerance is needed - not a drop-in replacement due to different pinout and layout. |
Compared with LM2575T-12, LM2575HVSX-12/NOPB offers superior thermal performance in surface-mount form; compared with LM2596SX-12, it trades higher current and tighter tolerance for lower EMI, simpler magnetics, and proven industrial reliability at 1 A.
Availability
LM2575HVSX-12/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, motor control boards, and embedded system pre-regulators requiring stable component supply, long-lifecycle support, and consistent parametric performance.
Supply support for LM2575HVSX-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 switching regulator design and manufacturing.
The LM2575HV series was developed specifically for high-input-voltage industrial and telecom applications demanding ruggedness, simplicity, and minimal external component count - targeting designers needing reliable 1A buck conversion without complex control loop tuning.
FAQ
What is the maximum input voltage rating for LM2575HVSX-12/NOPB?
The LM2575HVSX-12/NOPB supports a maximum input voltage of 60 V, confirmed in the Absolute Maximum Ratings table of the official datasheet (SNVS106E). This HV variant extends the standard LM2575's 40 V limit, enabling use in 48 V systems with headroom for transients. Operation above 60 V risks permanent damage.
Does LM2575HVSX-12/NOPB require an external feedback resistor network?
No, LM2575HVSX-12/NOPB does not require external feedback resistors. As a fixed-output version, its internal resistor divider sets the 12 V output; the FB pin is internally connected and unused. External resistors are only needed for the adjustable (ADJ) variants like LM2575HVSX-ADJ.
What package type is LM2575HVSX-12/NOPB supplied in?
LM2575HVSX-12/NOPB uses the 5-lead DDPAK/TO-263 surface-mount package (TI package code KTT0005B), featuring an exposed thermal pad. This package delivers θJA = 37 °C/W with 1 in² of PCB copper, significantly better than the TO-220 variant's 45 °C/W, and is optimized for automated SMT assembly.
Can LM2575HVSX-12/NOPB be used in buck-boost configurations?
Yes, LM2575HVSX-12/NOPB can be configured as a buck-boost converter (positive-to-negative) using standard application circuits documented in TI's SNVS106E datasheet (Section "Positive to Negative Converter"). This requires external inductor and diode reconfiguration but leverages the same internal switch and control architecture.
What is the typical efficiency of LM2575HVSX-12/NOPB at full load?
LM2575HVSX-12/NOPB achieves 88% typical efficiency at VIN = 15 V and IOUT = 1 A, as specified in the Electrical Characteristics table for the 12 V version. Efficiency remains >80% across 12–48 V input range at 1 A, making it suitable for thermally constrained industrial environments.
LM2575HVSX-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:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
LM2575HVSX-12/NOPB FAQ
1.How can I place an order for LM2575HVSX-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVSX-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 LM2575HVSX-12/NOPB reliable?
The price and inventory of LM2575HVSX-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 LM2575HVSX-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVSX-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVSX-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVSX-12/NOPB?
LM2575HVSX-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVSX-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 LM2575HVSX-12/NOPB?
For technical support, including LM2575HVSX-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVSX-12/NOPB requirements.
6.How does Aetrix verify that LM2575HVSX-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVSX-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 LM2575HVSX-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVSX-12/NOPB?
All LM2575HVSX-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVSX-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 LM2575HVSX-12/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVSX-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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