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onsemi LM2576TV-015G
- Part No.:
- LM2576TV-015G
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2576TV-015G.pdf
- Description:
- IC REG BUCK 15V 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:245
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Product details
Overview
LM2576TV-015G from onsemi is a monolithic 3.0 A, 15 V fixed-output step-down (buck) switching regulator in TO-220-5 package. It delivers ±4% output voltage accuracy over line/load/temperature, features 52 kHz fixed-frequency operation, cycle-by-cycle current limiting, thermal shutdown, and TTL-compatible ON/OFF control - enabling high-efficiency power conversion in industrial DC-DC supplies and battery charger pre-regulators.
For engineers reviewing the LM2576TV-015G datasheet, pinout, applications, or equivalent options, key selection criteria include input voltage range (7–40 V), guaranteed 3.0 A output current, 88% typical efficiency at 18 VIN/3.0 A, thermal resistance (RθJC = 5.0 °C/W), and compatibility with standard off-the-shelf inductors (e.g., Pulse PE-92108).
Technical Context
The LM2576TV-015G integrates a 1.0 A NPN switch, 1.235 V bandgap reference, error amplifier, 52 kHz oscillator, and thermal/current protection circuitry. Its fixed 15 V output eliminates external feedback resistors, simplifying design while maintaining regulation across −40 °C to +125 °C junction temperature.
Operation relies on voltage-mode PWM control with fixed frequency and variable duty cycle (up to 98%). The internal switch saturation voltage is 1.5 V (typ) at 3.0 A, and the device enters low-power standby mode (<200 µA) when the ON/OFF pin exceeds 2.2 V (TTL-high).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15 V ±4% over full line/load/temperature range - ensures stable rail for downstream logic or analog circuitry without trimming. |
| Max Output Current | 3.0 A continuous - supports medium-power loads such as microcontroller subsystems or sensor arrays without external current boosting. |
| Input Voltage Range | 7 V to 40 V - accommodates wide-input industrial or automotive battery-derived supplies (e.g., 12 V nominal with transients up to 36 V). |
| Switching Frequency | 52 kHz (±10%) - enables use of low-cost, high-saturation-current inductors (e.g., 100 µH) while minimizing EMI filtering complexity. |
| Efficiency | 88% typical at 18 VIN, 3.0 A load - reduces thermal dissipation vs. linear regulators, often eliminating need for heatsink in moderate ambient conditions. |
| Thermal Resistance | RθJC = 5.0 °C/W - allows direct heatsink mounting to Pin 3 (GND/Heatsink tab) for reliable operation at full load in ≤60 °C ambient. |
| Standby Current | 80 µA typical (ON/OFF pin = 5 V) - enables low-power system sleep modes without disconnecting input supply. |
Pinout & Package
LM2576TV-015G uses TO-220-5 package (Case 314B), with heatsink surface electrically connected to Pin 3 (GND). Mounting tab must be thermally coupled to heatsink and electrically tied to system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 7–40 V unregulated DC; requires local 100 µF/75 V electrolytic bypass capacitor to suppress switching transients. |
| 2 - Output | Emiter of internal NPN switch | Delivers regulated 15 V; PCB copper area must be minimized to reduce EMI coupling into sensitive circuits. |
| 3 - GND | Circuit ground & heatsink connection | Single-point ground reference; tab is electrically and thermally tied to this pin - mandatory for thermal performance and noise control. |
| 4 - Feedback | Regulation sense input | Internally connected to 15 V divider; unused in fixed-output version - must be left open or grounded per datasheet guidance. |
| 5 - ON/OFF | TTL-compatible enable/disable control | Logic-high (>2.2 V) disables regulator and drops quiescent current to ~80 µA; floating or logic-low (<1.0 V) enables operation. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 15 V output | Eliminates external resistor network - reduces BOM count, layout area, and temperature drift sensitivity vs. adjustable versions. |
| Cycle-by-cycle current limit | Peak current limit of 4.2–6.9 A (temp-dependent) provides robust short-circuit protection without latch-up or external sensing components. |
| Thermal shutdown | Activates at TJ ≥ 150 °C and auto-recovers upon cooling - prevents permanent damage during overload or poor heatsinking. |
| Low EMI design support | Fixed 52 kHz frequency and integrated soft-start (implicit via oscillator architecture) simplify compliance with CISPR 22 Class B conducted emissions limits. |
| Pb-free TO-220 package | Meets RoHS Directive 2011/65/EU; MSL Level 1 - allows standard reflow or wave soldering without moisture sensitivity concerns. |
Applications
| Industrial Power Supply | Automotive Battery Charger |
|---|---|
|
Use Scenario: 24 V truck battery powers 15 V instrumentation bus with transient-heavy environment. IC Role / Device Role / Timing Role: Primary buck regulator converting 18–32 V battery range to stable 15 V rail for analog front-ends and CAN transceivers. Use Value: 88% efficiency minimizes heat rise in sealed enclosures; 40 V max input withstands load-dump spikes up to 36 V. |
Use Scenario: On-board charger for 12 V lead-acid battery using alternator-derived input. IC Role / Device Role / Timing Role: Pre-regulator stepping down alternator output (13.5–16 V) to clean 15 V for charging controller ICs and status LEDs. Use Value: Fixed 15 V output avoids calibration drift; ON/OFF pin enables charge-state synchronization with microcontroller. |
| Programmable Logic Controller (PLC) Module | Point-of-Load Converter |
|
Use Scenario: DIN-rail mounted PLC requiring isolated 15 V for I/O driver stage and communication interface. IC Role / Device Role / Timing Role: Non-isolated buck stage supplying 15 V to optocoupler drivers and RS-485 transceivers. Use Value: 3.0 A rating supports multiple parallel I/O channels; TO-220 heatsink interface simplifies conduction-cooled chassis design. |
Use Scenario: FPGA development board needing dedicated 15 V rail for auxiliary peripherals (ADCs, DACs, clock buffers). IC Role / Device Role / Timing Role: Local point-of-load regulator fed from 24 V backplane, placed adjacent to load to minimize IR drop. Use Value: 52 kHz switching enables compact 100 µH inductor; ±4% tolerance ensures timing margin for 15 V-tolerant analog ICs. |
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 | Same electrical specs and TO-220-5 package; differs only in marking format and packaging (tape/reel vs. tube) - identical thermal and electrical behavior. | No functional difference; suitable for same PCB footprint and thermal design. | Select LM2576T-15 if volume tape-and-reel delivery is required; LM2576TV-015G is tube-packaged for prototyping and low-volume production. |
| MP1584EN-LF-Z | 3 A, 15 V fixed-output buck; 1.5 MHz switching (vs. 52 kHz); smaller SOIC-8 package; no integrated heatsink tab. | Higher frequency enables smaller magnetics but increases EMI filtering burden; lacks direct heatsink interface - requires PCB copper pour for thermal management. | Choose MP1584EN-LF-Z only when board space is constrained and higher-frequency EMI mitigation is feasible; LM2576TV-015G remains preferred for rugged industrial layouts with thermal demands. |
Compared with LM2576T-15, LM2576TV-015G offers identical performance in tube packaging for flexibility in small-batch builds; versus MP1584EN-LF-Z, it trades higher-frequency integration for superior thermal handling via TO-220 heatsink interface and lower EMI filter complexity - critical in noise-sensitive industrial environments.
Availability
LM2576TV-015G is available at Aetrix Electronics and suitable for industrial power supplies, automotive battery chargers, and programmable logic controller modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2576TV-015G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient power management, analog, and sensor technologies for automotive, industrial, and cloud infrastructure markets.
The LM2576 series was designed as a cost-optimized, easy-to-use buck regulator family targeting medium-current (≤3 A), medium-voltage (≤40 VIN) applications where simplicity, reliability, and thermal robustness outweigh ultra-small size or ultra-high efficiency.
FAQ
What is the maximum input voltage rating for LM2576TV-015G?
The LM2576TV-015G has an absolute maximum input voltage rating of 45 V, but its specified operating range is 7 V to 40 V. Operation above 40 V risks exceeding safe operating area limits and may trigger thermal shutdown or degrade long-term reliability. For automotive load-dump scenarios, ensure input clamping (e.g., TVS) limits transient exposure to ≤40 V.
Does LM2576TV-015G require an external feedback resistor network?
No. The LM2576TV-015G is a fixed-output variant with internal resistor divider set for 15 V. Pin 4 (Feedback) is internally connected and must be left unconnected or grounded per datasheet guidance - no external resistors are needed, reducing component count and layout sensitivity.
Can LM2576TV-015G be used in a negative-output (buck-boost) configuration?
Yes - the LM2576TV-015G can be configured as a positive-to-negative converter (inverting buck-boost) by rearranging external components per Figure 1 in the datasheet. In this topology, it generates −15 V from a positive input, retaining its 3.0 A capability and protection features, though efficiency drops ~5–10% versus standard buck operation.
What is the thermal resistance from junction to case (RθJC) for LM2576TV-015G?
The LM2576TV-015G has RθJC = 5.0 °C/W, measured from die junction to the metal tab (Pin 3). This value assumes proper mechanical contact between the tab and heatsink using thermal compound and adequate mounting pressure - critical for sustaining 3.0 A output at ambient temperatures above 40 °C.
Is LM2576TV-015G RoHS-compliant and lead-free?
Yes. The LM2576TV-015G is manufactured in a Pb-free TO-220 package compliant with EU RoHS Directive 2011/65/EU. It carries Moisture Sensitivity Level (MSL) 1, permitting standard SMT reflow or through-hole wave soldering without baking requirements.
LM2576TV-015G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7V
- Voltage - Input (Max):
- 40V
- 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
LM2576TV-015G FAQ
1.How can I place an order for LM2576TV-015G through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2576TV-015G 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 LM2576TV-015G reliable?
The price and inventory of LM2576TV-015G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2576TV-015G is usually 5 days.
3.What payment methods are accepted for LM2576TV-015G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2576TV-015G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2576TV-015G?
LM2576TV-015G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2576TV-015G 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 LM2576TV-015G?
For technical support, including LM2576TV-015G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2576TV-015G requirements.
6.How does Aetrix verify that LM2576TV-015G is sourced from the original manufacturer or authorized distributors?
All LM2576TV-015G 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 LM2576TV-015G meets industry standards.
7.What is the process for return or replacement of LM2576TV-015G?
All LM2576TV-015G units undergo pre-shipment inspection (PSI). If there is an issue with LM2576TV-015G, 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 LM2576TV-015G part is unused and in its original packaging.
Return procedure for LM2576TV-015G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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