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Texas Instruments LM2576HVT-5.0/LF02
- Part No.:
- LM2576HVT-5.0/LF02
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2576HVT-5.0/LF02.pdf
- Description:
- IC REG BUCK 5V 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,862
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Product details
Overview
LM2576HVT-5.0/LF02 from Texas Instruments is a non-synchronous 3-A step-down DC-DC switching regulator in TO-220-5 (KC) package, delivering fixed 5.0 V output with ±4% tolerance over line and load, supporting 8–60 V input range, and featuring 52-kHz fixed-frequency operation, TTL-compatible ON/OFF control, and cycle-by-cycle current limiting for motor drives and industrial power supplies.
For engineers reviewing the LM2576HVT-5.0/LF02 datasheet, LM2576HVT-5.0/LF02 pinout, LM2576HVT-5.0/LF02 application, or LM2576HVT-5.0/LF02 equivalent, key selection considerations include HV input rating (60 V max), thermal performance in TO-220 package (RθJA = 32.4°C/W), shutdown quiescent current (50 µA typ), output saturation voltage (1.8 V max at 3 A), and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2576HVT-5.0/LF02 integrates a high-side NPN switch, fixed-frequency oscillator, error amplifier, and thermal shutdown circuit in a monolithic buck topology. It operates in continuous conduction mode under full load and transitions to discontinuous mode at light loads without regulation loss.
Its feedback loop uses an internal 1.23-V reference with 100-nA bias current; the fixed 5.0-V version connects the FEEDBACK pin directly to the output capacitor. The ON/OFF pin enables active low logic control with 1.2-V threshold for activation and 1.4-V threshold for shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full operating temperature (−40°C to +125°C) and load (0.5–3 A), enabling stable logic supply without external resistor divider. |
| Input Voltage Range | 8 V to 60 V - supports wide-input industrial and automotive battery-fed systems where transient spikes exceed 40 V. |
| Output Current | 3 A DC continuous - sufficient for powering microcontrollers, sensors, and peripheral ICs without external current boosting. |
| Oscillator Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity vs. MHz-range converters. |
| Saturation Voltage | 1.8 V max at 3 A - defines minimum dropout: requires ≥6.8 V input to sustain 5 V/3 A output under worst-case conditions. |
| Standby Current | 50 µA typical at ON/OFF = HIGH - allows ultra-low-power system sleep modes without auxiliary LDOs. |
| Thermal Resistance | RθJA = 32.4°C/W (KC package) - mandates minimal heatsinking for ≤2 W dissipation at ambient 50°C. |
Pinout & Package
LM2576HVT-5.0/LF02 is housed in a 5-pin TO-220 (KC) package with exposed tab electrically connected to GROUND for thermal and electrical integrity. Mounting requires mechanical fastening and thermal interface to heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | High-side switch collector input | Primary DC input path; must connect to low-ESR input capacitor with shortest possible trace to minimize switching noise and voltage spikes. |
| 2 - OUTPUT | Switch emitter output node | High-frequency switching node; connects directly to inductor and catch diode cathode - critical for EMI layout and snubber placement. |
| 3 - GROUND | Power and signal reference | Common return for input cap, output cap, and feedback network; requires low-inductance connection to minimize ground bounce during switching. |
| 4 - FEEDBACK | Regulation sense input | Internally tied to 5.0-V output in fixed version; left unconnected externally - removal invalidates regulation accuracy. |
| 5 - ON/OFF | Enable/disable logic input | Active-low TTL-compatible control; pulled low to enable, >1.4 V to disable; floating state causes undefined operation. |
| TAB | Thermal and electrical ground | Exposed metal tab bonded to GROUND; must be soldered to large copper pour or heatsink to achieve rated RθJA. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0-V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity while ensuring ±4% regulation across temperature and load. |
| 60-V maximum input | Supports 48-V industrial bus, 36-V automotive transients, and unregulated AC/DC front-ends without pre-regulation stages. |
| Cycle-by-cycle current limit | Protects internal switch and external components during short-circuit or overload events without latch-up, enabling self-recovery operation. |
| 52-kHz fixed-frequency oscillator | Enables predictable EMI spectrum placement and simplifies filter design using standard low-frequency magnetics. |
| TTL-compatible ON/OFF control | Allows direct interfacing with microcontroller GPIOs or system power sequencers without level-shifting circuitry. |
Applications
| Motor Drive Power Supply | Industrial Sensor Node PSU |
|---|---|
Use Scenario: Powers gate drivers and logic circuitry in 24–48-V brushed DC motor controllers with intermittent stall currents. IC Role / Device Role / Timing Role: Primary non-isolated step-down regulator delivering clean 5-V rail for MCU, encoder interface, and H-bridge logic. Use Value: Withstands 60-V input transients during motor regeneration and maintains regulation during 3-A peak loads without thermal derating. | Use Scenario: Supplies 5-V power to wireless sensor modules in factory automation cabinets with wide ambient temperature swings. IC Role / Device Role / Timing Role: Main DC-DC converter converting 24-V field bus to regulated 5-V for RF SoC, ADC, and digital I/O. Use Value: −40°C to +125°C operating range and 50-µA standby current support cold-start and low-power sleep modes. |
| Test Equipment Auxiliary Rail | Appliance Control Board |
Use Scenario: Generates stable 5-V supply for analog front-end and FPGA configuration in benchtop multimeters and signal generators. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from main SMPS, minimizing noise coupling into precision analog sections. Use Value: Low output ripple (typ. <50 mVpp) and excellent line regulation (<0.2%) ensure measurement accuracy unaffected by input fluctuations. | Use Scenario: Provides 5-V power to microcontroller, display, and touch panel in washing machine and HVAC control boards. IC Role / Device Role / Timing Role: Main system regulator converting rectified AC or 24-V DC bus to logic supply with built-in fault protection. Use Value: Integrated thermal shutdown and current limiting prevent field failures due to wiring faults or component degradation over 10+ year lifetimes. |
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 input); identical pinout, package, and 5-V output spec. | Not suitable for >40 V input rails; lower thermal margin in TO-220 due to reduced max input headroom. | Select only when input never exceeds 40 V and cost sensitivity outweighs transient robustness. |
| LM2596T-5.0 | Higher 150-kHz switching frequency; smaller external components; 40 V max input; different pinout (no ON/OFF pin). | Lacks enable control and HV rating; requires PCB redesign; better for space-constrained consumer designs. | Choose when board area is critical and input stays ≤40 V; avoid if system-level shutdown sequencing or 48-V compatibility is required. |
Compared with LM2576T-5.0, LM2576HVT-5.0/LF02 adds 20 V input headroom and enhanced transient immunity; compared with LM2596T-5.0, it trades higher frequency for proven ruggedness, enable functionality, and drop-in replacement in legacy TO-220 layouts.
Availability
LM2576HVT-5.0/LF02 is available at Aetrix Electronics and suitable for motor drives, industrial sensor nodes, test equipment auxiliary rails, and appliance control boards requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for LM2576HVT-5.0/LF02 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 reliable, high-volume power conversion ICs.
The LM2576xx series was designed for cost-sensitive, thermally demanding industrial and automotive applications where simplicity, ruggedness, and long-lifecycle support outweigh advanced features like synchronization or PMBus control.
FAQ
What is the maximum input voltage rating for LM2576HVT-5.0/LF02?
The LM2576HVT-5.0/LF02 supports a maximum input voltage of 60 V, verified per Absolute Maximum Ratings in the TI datasheet SNVS107G. This HV rating distinguishes it from the standard LM2576 (40 V max) and enables use in 48-V systems with transient margins. Exceeding 60 V risks permanent damage to the internal switch.
Does LM2576HVT-5.0/LF02 require external feedback resistors?
No, LM2576HVT-5.0/LF02 is a fixed 5.0-V output variant - its internal feedback divider is factory-trimmed, and the FEEDBACK pin is internally connected to the output. External resistors are unnecessary and must not be added, as they would disrupt regulation accuracy and stability.
What thermal performance can be expected from LM2576HVT-5.0/LF02 in TO-220 package?
In the KC (TO-220-5) package, LM2576HVT-5.0/LF02 has RθJA = 32.4°C/W with JEDEC-standard 4-layer board. With proper heatsinking via the grounded tab, it delivers full 3-A output up to +50°C ambient. Without heatsink, continuous 3-A operation is limited to ~35°C ambient per thermal calculations.
How does the ON/OFF pin function on LM2576HVT-5.0/LF02?
The ON/OFF pin on LM2576HVT-5.0/LF02 is TTL-compatible and active-low: ≤1.2 V enables regulation; ≥1.4 V disables it, reducing quiescent current to 50 µA typical. It must never be left floating - tie to GND via 10-kΩ resistor for default-on operation or drive actively from a controller GPIO.
Is LM2576HVT-5.0/LF02 pin-compatible with other LM2576 variants?
Yes, LM2576HVT-5.0/LF02 shares identical 5-pin TO-220 (KC) and DDPAK (KTT) footprints and pin functions with all LM2576xx family members, including LM2576-5.0 and LM2576HV-5.0. This allows direct substitution in existing layouts when upgrading to 60-V input capability without PCB revision.
LM2576HVT-5.0/LF02 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5 Formed Leads
- 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/LF02 FAQ
1.How can I place an order for LM2576HVT-5.0/LF02 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2576HVT-5.0/LF02 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/LF02 reliable?
The price and inventory of LM2576HVT-5.0/LF02 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/LF02 is usually 5 days.
3.What payment methods are accepted for LM2576HVT-5.0/LF02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2576HVT-5.0/LF02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2576HVT-5.0/LF02?
LM2576HVT-5.0/LF02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2576HVT-5.0/LF02 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/LF02?
For technical support, including LM2576HVT-5.0/LF02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2576HVT-5.0/LF02 requirements.
6.How does Aetrix verify that LM2576HVT-5.0/LF02 is sourced from the original manufacturer or authorized distributors?
All LM2576HVT-5.0/LF02 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/LF02 meets industry standards.
7.What is the process for return or replacement of LM2576HVT-5.0/LF02?
All LM2576HVT-5.0/LF02 units undergo pre-shipment inspection (PSI). If there is an issue with LM2576HVT-5.0/LF02, 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/LF02 part is unused and in its original packaging.
Return procedure for LM2576HVT-5.0/LF02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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