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onsemi LM2576TV-012
- Part No.:
- LM2576TV-012
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2576TV-012.pdf
- Description:
- IC REG BUCK 12V 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,483
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Product details
Overview
LM2576TV-012 from onsemi is a monolithic 3.0 A, 12 V fixed-output step-down (buck) switching regulator in TO-220-5 package. It operates from 7.0 V to 40 V input, delivers ±4% output voltage accuracy over line/load/temperature, features 52 kHz fixed-frequency internal oscillator, cycle-by-cycle current limiting, thermal shutdown, and TTL-compatible ON/OFF control - used in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2576TV-012 datasheet, pinout, applications, or equivalent options, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain-ready availability details - all grounded in the official onsemi LM2576/D Rev. 11 datasheet.
Technical Context
The LM2576TV-012 integrates a 3.0 A NPN switch, 1.235 V bandgap reference, error amplifier, 52 kHz oscillator, and thermal/current protection circuitry into a single TO-220-5 package. Its fixed 12 V output eliminates external feedback resistors, simplifying layout and improving stability under load transients up to 3.0 A.
It uses voltage-mode PWM control with fixed frequency operation and automatic frequency foldback (to ~18 kHz) during overload or short-circuit conditions. The internal switch saturation voltage is 1.5 V (typ) at 3.0 A, enabling efficient operation across wide input ranges while maintaining guaranteed regulation within ±4% over −40 °C to +125 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over full line/load/temperature range - ensures stable rail for microcontrollers, sensors, and analog circuitry without trimming. |
| Max Output Current | 3.0 A continuous - supports mid-power applications like motor drivers, industrial I/O modules, and embedded system main rails. |
| Input Voltage Range | 7.0 V to 40 V DC - compatible with 12 V/24 V industrial buses and unregulated AC-DC front-ends. |
| Switching Frequency | 52 kHz (±10%) - enables use of low-cost, standard inductors (e.g., 100 µH Pulse PE-92108) and reduces EMI filtering complexity. |
| Efficiency | 88% at Vin = 15 V, IOUT = 3.0 A - significantly reduces thermal load vs. linear regulators, often eliminating heatsink requirements. |
| Quiescent Current | 5.0 mA (typ), 11 mA (max) - enables low standby power in always-on systems; drops to 80 µA in TTL shutdown mode. |
| Protection Features | Cycle-by-cycle current limiting, thermal shutdown, and safe ON/OFF logic interface - ensures robust operation under fault conditions without external circuitry. |
Pinout & Package
LM2576TV-012 uses the TO-220-5 package (Case 314B), with heatsink surface electrically connected to Pin 3 (GND). The package is Pb-free and moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 7–40 V unregulated DC; requires local 100 µF low-ESR input capacitor to suppress switching transients. |
| 2 - Output | Emiter of internal NPN switch | Delivers regulated 12 V; PCB copper area must be minimized to reduce coupling into sensitive circuits. |
| 3 - GND | Circuit ground reference | Common return for input/output capacitors, diode cathode, and heatsink; single-point grounding recommended. |
| 4 - Feedback | Regulation sense node | Internally tied to 12 V divider; not accessible - eliminates resistor selection errors and improves accuracy vs. adjustable versions. |
| 5 - ON/OFF | TTL-compatible enable/disable control | Logic-high (>2.2 V) disables regulator, reducing input current to 80 µA; open or logic-low enables operation. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12 V output | Eliminates external feedback resistors, reducing BOM count, layout sensitivity, and long-term drift risk. |
| 3.0 A guaranteed output | Supports higher-current loads than typical 1–2 A buck ICs without external MOSFETs or complex compensation. |
| 52 kHz fixed-frequency oscillator | Enables predictable EMI filtering and compatibility with off-the-shelf, cost-optimized inductors (e.g., Pulse PE-92108). |
| TTL shutdown with 80 µA standby | Allows clean power sequencing and ultra-low-power sleep modes in battery-backed or energy-conscious systems. |
| Integrated thermal & current protection | Prevents damage during overload, short-circuit, or ambient overheating - no external sensing or latch circuitry required. |
Applications
| Industrial Power Supply | Embedded System Main Rail |
|---|---|
|
Use Scenario: Providing stable 12 V power to PLC I/O modules operating from 24 V DC bus with variable load and ambient temperatures up to 70 °C. IC Role / Device Role / Timing Role: Primary step-down regulator converting unregulated 24 V to clean 12 V rail for digital logic, analog sensors, and communication interfaces. Use Value: Delivers 3.0 A with ±4% regulation and 88% efficiency - reduces heat generation and eliminates need for heatsink in enclosed enclosures. |
Use Scenario: Powering ARM-based industrial gateways with multiple peripherals (Ethernet PHY, RS-485 transceivers, ADCs) from a 24 V field supply. IC Role / Device Role / Timing Role: Central DC-DC converter generating main 12 V system rail; ON/OFF pin synchronized to host processor's sleep/wake cycles. Use Value: 80 µA shutdown current extends battery backup runtime; fixed output avoids calibration drift in long-life deployments. |
| Motor Drive Pre-Regulator | Test Equipment Power Module |
|
Use Scenario: Supplying gate drive and logic power to half-bridge motor controllers in HVAC blowers, where input voltage varies between 18–36 V DC. IC Role / Device Role / Timing Role: Efficient pre-regulator stepping down variable bus voltage to stable 12 V for isolated gate drivers and MCU core logic. Use Value: Wide 7–40 V input range accommodates battery sag and ripple; thermal shutdown prevents latch-up during stall conditions. |
Use Scenario: Generating calibrated 12 V output in portable benchtop power analyzers requiring low-noise, repeatable voltage rails for precision measurement circuitry. IC Role / Device Role / Timing Role: High-accuracy, fixed-output buck regulator serving as reference rail for DACs, op-amps, and ADC references. Use Value: ±4% output tolerance over temperature ensures measurement consistency; low quiescent current preserves battery life during idle periods. |
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-12 | Same electrical specs and TO-220-5 package, but obsolete per onsemi discontinuation notice (page 24); no longer recommended for new designs. | Identical functional behavior, but lacks current lifecycle support and may have limited traceable sourcing. | Select LM2576TV-012 for guaranteed availability, Pb-free compliance, and active manufacturing status. |
| MP1584EN-LF-Z | 2 A rated, 1.5 MHz switching frequency, smaller SOIC-8 package; requires external feedback resistors and compensation components. | Better suited for space-constrained, lower-current applications; lacks integrated thermal/current protection architecture of LM2576TV-012. | Choose LM2576TV-012 when 3.0 A output, fixed 12 V, robust protection, and TO-220 thermal performance are required. |
Compared with LM2576T-12 and MP1584EN-LF-Z, the LM2576TV-012 offers active production status, guaranteed 3.0 A output with integrated protection, and simplified fixed-voltage design - making it optimal for industrial power supplies where reliability, thermal margin, and long-term component continuity are critical.
Availability
LM2576TV-012 is available at Aetrix Electronics and suitable for industrial power supplies, embedded system main rails, motor drive pre-regulators, and test equipment power modules requiring stable component supply, long lifecycle assurance, and traceable sourcing.
Supply support for LM2576TV-012 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 specifically for simple, high-efficiency, medium-current DC-DC conversion in industrial and embedded systems - emphasizing ease of use, minimal external components, and robust fault protection without sacrificing performance.
FAQ
What is the maximum input voltage rating for the LM2576TV-012?
The LM2576TV-012 has an absolute maximum input voltage rating of 45 V, but its specified operating range is 7.0 V to 40 V DC. Operation above 40 V risks exceeding guaranteed performance limits and may trigger internal protection or cause reliability degradation. For reliable 12 V output, maintain input within the 7–40 V window per the onsemi LM2576/D datasheet.
Does the LM2576TV-012 require external feedback resistors?
No, the LM2576TV-012 does not require external feedback resistors. As a fixed 12 V output variant, its internal resistor divider is factory-trimmed and permanently configured - eliminating component count, layout sensitivity, and long-term drift concerns associated with external resistor networks.
What is the thermal resistance (junction-to-case) of the LM2576TV-012 package?
The LM2576TV-012 in TO-220-5 (Case 314B) has a thermal resistance of RJC = 5.0 °C/W. This value enables direct heatsink mounting via Pin 3 (GND), allowing effective thermal management even at full 3.0 A load - critical for sustained operation in enclosed industrial environments.
Can the LM2576TV-012 be used in battery-powered applications?
Yes, the LM2576TV-012 supports battery-powered applications via its TTL-compatible ON/OFF pin, which reduces quiescent current to 80 µA in shutdown mode. Its 7 V minimum input allows use with 12 V lead-acid or multi-cell Li-ion packs, and 88% efficiency at full load extends operational runtime.
Is the LM2576TV-012 RoHS compliant and Pb-free?
Yes, the LM2576TV-012 is explicitly marked as Pb-free in the onsemi datasheet (page 1) and meets RoHS requirements. Its TO-220-5 package carries MSL Level 1 rating, indicating unlimited floor life and compatibility with standard reflow and hand-soldering processes.
LM2576TV-012 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):
- 12V
- 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-012 FAQ
1.How can I place an order for LM2576TV-012 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2576TV-012 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-012 reliable?
The price and inventory of LM2576TV-012 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2576TV-012 is usually 5 days.
3.What payment methods are accepted for LM2576TV-012?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2576TV-012 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2576TV-012?
LM2576TV-012 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2576TV-012 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-012?
For technical support, including LM2576TV-012 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2576TV-012 requirements.
6.How does Aetrix verify that LM2576TV-012 is sourced from the original manufacturer or authorized distributors?
All LM2576TV-012 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-012 meets industry standards.
7.What is the process for return or replacement of LM2576TV-012?
All LM2576TV-012 units undergo pre-shipment inspection (PSI). If there is an issue with LM2576TV-012, 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-012 part is unused and in its original packaging.
Return procedure for LM2576TV-012:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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