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Texas Instruments LM2576HVT-5.0/NOPB
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- Part No.:
- LM2576HVT-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5
- Datasheet:
-
LM2576HVT-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,140
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Product details
Overview
LM2576HVT-5.0/NOPB from Texas Instruments is a monolithic 3-A non-synchronous step-down DC-DC regulator in TO-220 (KC) package, delivering fixed 5.0 V output with ±4% tolerance over line and load, operating from 8–60 V input, and featuring 52-kHz fixed-frequency switching, cycle-by-cycle current limiting, and thermal shutdown for motor drive and industrial PSU applications.
For engineers reviewing the LM2576HVT-5.0/NOPB datasheet, LM2576HVT-5.0/NOPB pinout, LM2576HVT-5.0/NOPB application, or LM2576HVT-5.0/NOPB equivalent, key selection considerations include HV input range (60 V max), TTL-compatible ON/OFF control, 50 µA standby current, saturation voltage ≤1.8 V at 3 A, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2576HVT-5.0/NOPB implements a fixed-frequency buck topology with internal 52-kHz oscillator, integrated 3-A NPN switch, and bandgap-referenced error amplifier. Its feedback loop uses direct output sensing (no external divider required for fixed 5-V version), enabling stable regulation across −40°C to +125°C junction temperature.
Functional safety features include cycle-by-cycle current limiting (ICL = 4.2–6.9 A), thermal shutdown activation at ~150°C, and undervoltage lockout inherent to startup behavior. The ON/OFF pin supports active-low enable logic with VIH = 2.2 V (max) and VIL = 1.2 V (min), allowing simple microcontroller or logic-level control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures stable logic supply without external resistor network. |
| Input Voltage Range | 8 V to 60 V - supports wide industrial input rails including 24 V, 48 V, and unregulated AC/DC outputs. |
| Output Current | 3 A continuous - sufficient for powering FPGA I/O banks, MCU cores, or multiple peripheral ICs from single stage. |
| Switching Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current power inductors and reduces EMI filtering complexity. |
| Saturation Voltage | 1.4–1.8 V at 3 A - defines conduction loss and thermal dissipation; requires heatsink above ~1.5 A at high VIN/VOUT ratios. |
| Standby Current | 50 µA typical - enables low-power system sleep modes without auxiliary LDOs or external switches. |
| Oscillator Frequency Drop | ~11 kHz under short-circuit - reduces average power dissipation during fault, preventing thermal runaway. |
Pinout & Package
LM2576HVT-5.0/NOPB uses the KC (TO-220, 5-pin) package with 10.16 mm × 8.51 mm body size and thermally enhanced metal tab connected internally to GROUND. The tab must be mounted to a heatsink or large copper pour for thermal management above 1.2 A continuous load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power input | High-side collector node of internal NPN switch; connects directly to input capacitor and upstream supply - trace must be short and low-inductance. |
| 2 - OUTPUT | Switching node | Emitter of internal NPN switch; drives external catch diode and inductor - critical high-dI/dt path requiring tight layout and ground return. |
| 3 - GROUND | Power and signal reference | Common return for internal circuitry, feedback amplifier, and ON/OFF logic; must tie directly to input/output capacitor grounds with minimal impedance. |
| 4 - FEEDBACK | Voltage sense input | Internally connected to 5-V output; no external resistors needed - simplifies design and eliminates divider drift/tolerance errors. |
| 5 - ON/OFF | Enable control | Active-low TTL-compatible input; <1.2 V enables regulation, >2.2 V disables output and enters 50-µA standby - supports sequenced power-up or fault shutdown. |
| TAB | Thermal & electrical ground | Internally bonded to GROUND pin; provides primary thermal path to heatsink - must be electrically isolated from other potentials if heatsink is not grounded. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5-V output with internal feedback | Eliminates external resistor divider, reducing BOM count, layout area, and output voltage drift due to resistor tolerance/temperature coefficients. |
| 60-V maximum input rating (HV version) | Supports operation from 48-V telecom, industrial 24/48-V systems, and automotive cold-crank transients without external pre-regulation. |
| Cycle-by-cycle current limiting | Prevents destructive inductor saturation and MOSFET failure during overload or short-circuit by clamping peak switch current to 4.2–6.9 A. |
| Integrated thermal shutdown | Automatically disables switching when junction temperature exceeds ~150°C, protecting device and PCB during sustained overload or inadequate heatsinking. |
| 52-kHz fixed-frequency oscillator | Enables predictable EMI spectrum placement and simplifies filter design versus variable-frequency alternatives; frequency stability ±10% over temperature. |
Applications
| Motor Drive Power Supply | Industrial Server PSU |
|---|---|
Use Scenario: Providing regulated 5-V rail for gate drivers, position sensors, and MCU control logic in brushed/BLDC motor inverters. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24–48 V bus to clean 5-V logic supply with fast transient response to PWM switching noise. Use Value: Delivers 3-A peak current during sensor burst reads and driver logic transitions while maintaining ±4% regulation despite input ripple up to 10%. | Use Scenario: Generating auxiliary 5-V standby and main 5-V system rail in merchant server power supplies with wide-input front-end. IC Role / Device Role / Timing Role: Secondary-stage buck converter after AC/DC or intermediate bus converter, supporting hot-swap and sequencing requirements. Use Value: Enables compact, heatsink-free design at ≤1.5 A loads and supports remote ON/OFF control via motherboard CPLD for power state management. |
| Appliance Control Board | Test Equipment Power Module |
Use Scenario: Powering microcontroller, display interface, and relay drivers on white-goods control boards exposed to 120/230 VAC-derived 24–40 V DC rails. IC Role / Device Role / Timing Role: Robust, cost-optimized DC-DC stage replacing linear regulators to eliminate heat sink and improve efficiency in enclosed enclosures. Use Value: Withstands 60-V input surges during compressor startup and maintains regulation across −25°C to +70°C ambient with no derating. | Use Scenario: Supplying precision analog and digital circuitry in portable test instruments requiring low-noise, stable 5-V rail from battery or universal adapter inputs. IC Role / Device Role / Timing Role: Main system regulator with low standby current and fast wake-up, supporting battery life extension and instant-on functionality. Use Value: 50-µA shutdown current extends battery runtime in sleep mode; 52-kHz switching allows effective LC filtering to achieve <10 mVpp output ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576T-5.0 | Standard-voltage version (40 V max VIN) in same KC package; identical pinout and 5-V output spec. | Limited to ≤40 V input systems; unsuitable for 48-V industrial or automotive cold-crank environments. | Select when input never exceeds 40 V and cost sensitivity outweighs HV margin. |
| LM2596T-5.0 | Higher 150-kHz switching frequency, lower 3-A IOUT rating, and different pinout (VIN/OUT/GND/FEEDBACK/ON-OFF sequence differs). | Requires PCB redesign due to non-pin-compatible layout; offers smaller magnetics but reduced thermal robustness at full load. | Choose only for space-constrained designs where 150-kHz operation justifies layout rework and thermal validation. |
Compared with LM2576T-5.0, the LM2576HVT-5.0/NOPB adds 20 V input headroom critical for industrial reliability; compared with LM2596T-5.0, it trades higher-frequency operation for proven thermal resilience and drop-in compatibility with legacy LM2576 layouts.
Availability
LM2576HVT-5.0/NOPB is available at Aetrix Electronics and suitable for motor drives, industrial server PSUs, appliance control boards, and test equipment requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for LM2576HVT-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 decades of expertise in high-reliability power conversion ICs.
The LM2576 series was designed as a rugged, easy-to-use replacement for linear regulators in industrial, automotive, and consumer power systems - prioritizing fault protection, minimal external components, and thermal robustness over ultra-high efficiency.
FAQ
What is the maximum input voltage rating for LM2576HVT-5.0/NOPB?
The LM2576HVT-5.0/NOPB has an absolute maximum input voltage of 63 V and a recommended operating maximum of 60 V. This HV rating distinguishes it from the standard LM2576 (40 V max), making it suitable for 48-V systems with transient margins. Operation beyond 60 V risks permanent damage per Absolute Maximum Ratings in the TI datasheet SNVS107G.
Does LM2576HVT-5.0/NOPB require external feedback resistors?
No, LM2576HVT-5.0/NOPB does not require external feedback resistors. As a fixed 5.0-V output variant, its internal feedback network connects pin 4 (FEEDBACK) directly to the output, eliminating external dividers. This simplifies design, improves accuracy, and avoids drift from resistor tolerances or temperature coefficients - confirmed in Section 5 (Pin Functions) and Figure 8-3 of the datasheet.
What thermal management is required for LM2576HVT-5.0/NOPB at full 3-A load?
At 3-A output with 48-V input and 5-V output, LM2576HVT-5.0/NOPB dissipates ~13 W. Using the KC package's RθJA = 32.4°C/W, junction temperature rise exceeds safe limits without heatsinking. A minimum 15 cm² copper pour (2 oz) or small extruded aluminum heatsink is required. Thermal data is specified in Section 6.4 of SNVS107G, and the metal tab must be electrically tied to GROUND.
Can LM2576HVT-5.0/NOPB be synchronized to an external clock?
No, LM2576HVT-5.0/NOPB cannot be synchronized to an external clock. It uses an internal fixed-frequency 52-kHz oscillator with no sync input pin or frequency adjustment capability. Section 6.10 confirms oscillator frequency is uncontrolled and varies ±10% over temperature and supply - unlike newer TI regulators such as LM76003 that support external synchronization.
Is LM2576HVT-5.0/NOPB RoHS compliant and lead-free?
Yes, LM2576HVT-5.0/NOPB is RoHS compliant and lead-free. The "/NOPB" suffix explicitly denotes "No Lead (Pb)-Free" per Texas Instruments' packaging nomenclature. This is verified in TI's official product folder and orderable addendum for SNVS107G, confirming compliance with EU RoHS Directive 2011/65/EU and JEDEC J-STD-609 moisture sensitivity level 3.
LM2576HVT-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5
- 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LM2576HVT-5.0/NOPB FAQ
1.How can I place an order for LM2576HVT-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2576HVT-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 LM2576HVT-5.0/NOPB reliable?
The price and inventory of LM2576HVT-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 LM2576HVT-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2576HVT-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2576HVT-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2576HVT-5.0/NOPB?
LM2576HVT-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2576HVT-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 LM2576HVT-5.0/NOPB?
For technical support, including LM2576HVT-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2576HVT-5.0/NOPB requirements.
6.How does Aetrix verify that LM2576HVT-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2576HVT-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 LM2576HVT-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2576HVT-5.0/NOPB?
All LM2576HVT-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2576HVT-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 LM2576HVT-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2576HVT-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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