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Texas Instruments LM2576HVT-15
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- Part No.:
- LM2576HVT-15
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5
- Datasheet:
-
LM2576HVT-15.pdf
- Description:
- IC REG BUCK 15V 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,929
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Product details
Overview
LM2576HVT-15 from Texas Instruments is a monolithic 3-A non-synchronous step-down DC-DC regulator in TO-220-5 (KC) package, delivering fixed 15-V output with ±4% tolerance over line and load, supporting input voltages up to 60 V, and operating at 52-kHz fixed frequency for motor drive power supplies and industrial embedded systems.
For engineers reviewing the LM2576HVT-15 datasheet, LM2576HVT-15 pinout, LM2576HVT-15 application, or LM2576HVT-15 equivalent, key selection criteria include HV input capability (60 V max), thermal performance in TO-220 package (RθJA = 32.4°C/W), shutdown quiescent current (50 µA typ), and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2576HVT-15 integrates a high-side NPN switch, fixed-frequency oscillator, error amplifier, and thermal/current protection circuitry. Its non-synchronous buck architecture uses an external catch diode and requires only four external components: input capacitor, output capacitor, inductor, and feedback network (shorted for fixed 15-V version).
It operates in active mode when ON/OFF pin voltage falls below 1.2 V, enters shutdown at >1.4 V, and features cycle-by-cycle current limiting (ICL = 4.2–6.9 A) plus thermal shutdown. Output regulation relies on internal 1.23-V reference and feedback comparator comparing divided output voltage to that reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15 V ±4% over full temperature and load range - ensures stable rail for 15-V logic or analog subsystems without external resistor divider. |
| Max Input Voltage | 60 V - supports wide-input industrial, automotive, or telecom power buses where transients exceed 40 V. |
| Output Current | 3 A continuous - sufficient for powering multiple ICs, small motors, or sensor modules without parallel devices. |
| Oscillator Frequency | 52 kHz (±10%) - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity vs. MHz-range converters. |
| Standby Current | 50 µA typical - minimizes system-level power loss during sleep or standby modes in battery-backed or energy-sensitive applications. |
| Saturation Voltage | 1.4–2.0 V at 3 A - defines conduction loss in internal switch; combined with 15-V output, sets minimum practical input voltage (~17 V) for full-load operation. |
| Thermal Resistance | RθJA = 32.4°C/W (TO-220) - determines heatsink requirement: ~10°C rise at 3 A full load with 100% duty cycle worst-case estimation. |
Pinout & Package
LM2576HVT-15 is housed in KC (TO-220-5) package with exposed tab thermally and electrically connected to GND. The tab must be mounted to a heatsink or large copper pour for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply connection | Connects to high-voltage DC source (≤60 V) and input bypass capacitor; shortest possible trace to minimize switching noise coupling. |
| 2 - OUTPUT | Switching node | Drives external catch diode cathode and inductor; high dv/dt node requiring tight layout and ground shielding to reduce EMI. |
| 3 - GROUND | Power and signal reference | Common return for input/output capacitors and feedback network; must tie directly to VIN and OUTPUT capacitor grounds with minimal loop area. |
| 4 - FEEDBACK | Regulation sense input | Internally tied to output for fixed 15-V version; left unconnected or shorted to output - no external resistors required. |
| 5 - ON/OFF | Enable control input | TTL-compatible shutdown: <1.2 V = ON, >1.4 V = OFF; pull to GND for always-on operation; floating is prohibited. |
| TAB | Thermal & electrical ground | Internally connected to GND; provides primary heat path to heatsink; must be soldered to ≥1 in² copper for rated 3-A performance. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 15-V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity while ensuring precise factory-trimmed regulation. |
| 60-V HV input rating | Enables direct integration into 48-V industrial buses or automotive systems with load-dump immunity without pre-regulation stages. |
| 52-kHz fixed-frequency operation | Allows predictable EMI filtering design and compatibility with low-cost, high-current toroidal inductors optimized for 50–100 kHz. |
| TTL shutdown with 50-µA standby | Supports microcontroller-controlled power sequencing and low-power sleep states without auxiliary LDOs or discrete FETs. |
| Cycle-by-cycle current limiting | Provides robust overload and short-circuit protection without external sensing, maintaining safe peak inductor current under fault conditions. |
Applications
| Motor Drive Power Supply | Industrial Server PSU |
|---|---|
Use Scenario: Providing regulated 15-V bias for gate drivers and logic in 24/48-V DC motor controllers. IC Role / Device Role / Timing Role: Primary step-down regulator converting high-voltage bus to isolated 15-V rail for MOSFET driver ICs and microcontroller peripherals. Use Value: High input voltage tolerance (60 V) accommodates motor back-EMF spikes; 3-A output supports multiple drivers simultaneously. | Use Scenario: Generating auxiliary 15-V rail in merchant server power supplies for fan controllers, BMC interfaces, and LED indicators. IC Role / Device Role / Timing Role: Secondary non-isolated buck converter downstream of main AC/DC stage, delivering clean, efficient 15-V output. Use Value: Fixed-output simplicity reduces design risk; TO-220 package allows easy heatsinking on crowded server PCBs. |
| Appliance Control Board | Test Equipment Power Module |
Use Scenario: Powering 15-V solenoid drivers, display backlight inverters, and MCU I/O buffers in smart home appliances. IC Role / Device Role / Timing Role: Main DC-DC regulator supplying multiple subsystems from a shared 48-V or 60-V internal bus. Use Value: ±4% output tolerance ensures consistent actuator timing and display brightness; low standby current extends battery backup duration. | Use Scenario: Delivering stable 15-V output in portable benchtop test equipment requiring low-noise, high-reliability power. IC Role / Device Role / Timing Role: Precision voltage source for analog front-end circuitry and calibration references in multimeters or signal generators. Use Value: Excellent line/load regulation (<0.5% typical) maintains accuracy across varying input conditions; thermal shutdown prevents drift during extended operation. |
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-15 | Standard-voltage version (40 V max input) in same TO-220-5 package; identical pinout and 15-V output spec. | Not suitable for >40 V input rails; lower thermal margin due to reduced max junction temperature derating at high VIN. | Select LM2576T-15 only if input never exceeds 40 V and cost is prioritized over HV headroom. |
| LM2596T-15 | Higher-frequency (150 kHz) 3-A buck regulator with improved efficiency (≥85% at 15 V); same TO-220-5 footprint but different pin assignment (FEEDBACK and ON/OFF swapped). | Requires PCB layout revision; better suited for space-constrained designs needing smaller inductors, but lacks HV input support. | Choose LM2596T-15 when board area is limited and input stays ≤40 V; verify pin compatibility before drop-in replacement. |
Compared with LM2576T-15, the LM2576HVT-15 adds critical 60-V input capability for harsh environments, while LM2596T-15 trades HV tolerance for higher switching frequency and efficiency - making LM2576HVT-15 optimal for industrial 48-V systems requiring proven ruggedness and minimal redesign effort.
Availability
LM2576HVT-15 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 thermal reliability.
Supply support for LM2576HVT-15 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 LM2576 series was designed as a robust, easy-to-use replacement for linear regulators in medium-power industrial and embedded applications - emphasizing simplicity, fault protection, and compatibility with standard passive components.
FAQ
What is the maximum input voltage rating for LM2576HVT-15?
The LM2576HVT-15 supports a maximum input voltage of 60 V, confirmed in the Absolute Maximum Ratings table and Recommended Operating Conditions section of the official TI datasheet SNVS107G. This HV rating distinguishes it from the standard LM2576T-15 (40 V max) and enables use in 48-V industrial and automotive systems with transient headroom. Exceeding 60 V risks permanent damage.
Does LM2576HVT-15 require external feedback resistors to set the output voltage?
No, LM2576HVT-15 does not require external feedback resistors. As a fixed-output variant, its 15-V regulation is internally trimmed and factory-set. Pin 4 (FEEDBACK) is internally connected to the output; per the datasheet, it should be left unconnected or shorted to the output capacitor - no resistor divider is needed, simplifying layout and improving stability.
What package type and thermal characteristics apply to LM2576HVT-15?
LM2576HVT-15 uses the KC (TO-220-5) package with an exposed GND-connected tab. Its junction-to-ambient thermal resistance is 32.4°C/W under JEDEC 4-layer board conditions. For reliable 3-A operation, the tab must be soldered to a heatsink or ≥1 in² copper pour; thermal performance degrades significantly without proper heatsinking due to internal power dissipation.
How does the ON/OFF pin function on LM2576HVT-15?
The ON/OFF pin (Pin 5) provides TTL-compatible enable control: voltage <1.2 V enables regulation, >1.4 V disables it. In shutdown, LM2576HVT-15 draws only 50 µA typical quiescent current. The pin must never be left floating - tie to GND for always-on operation or drive with a logic signal for controlled power sequencing.
Can LM2576HVT-15 replace LM2576T-15 in an existing design?
Yes, LM2576HVT-15 is pin-compatible and functionally identical to LM2576T-15 except for its higher 60-V input rating. No PCB changes are required. However, verify that the original design's input voltage remains within 60 V, and confirm thermal margins - the HV version may dissipate more power at high VIN, necessitating equivalent or improved heatsinking.
LM2576HVT-15 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- 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):
- 15V
- 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-15 FAQ
1.How can I place an order for LM2576HVT-15 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2576HVT-15 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-15 reliable?
The price and inventory of LM2576HVT-15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2576HVT-15 is usually 5 days.
3.What payment methods are accepted for LM2576HVT-15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2576HVT-15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2576HVT-15?
LM2576HVT-15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2576HVT-15 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-15?
For technical support, including LM2576HVT-15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2576HVT-15 requirements.
6.How does Aetrix verify that LM2576HVT-15 is sourced from the original manufacturer or authorized distributors?
All LM2576HVT-15 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-15 meets industry standards.
7.What is the process for return or replacement of LM2576HVT-15?
All LM2576HVT-15 units undergo pre-shipment inspection (PSI). If there is an issue with LM2576HVT-15, 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-15 part is unused and in its original packaging.
Return procedure for LM2576HVT-15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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