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onsemi LM2576D2T-015
- Part No.:
- LM2576D2T-015
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2576D2T-015.pdf
- Description:
- IC REG BUCK 15V 3A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,839
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Product details
Overview
LM2576D2T-015 from onsemi is a monolithic 3.0 A, 15 V fixed-output step-down (buck) switching regulator in D2PAK package, featuring 52 kHz internal oscillator, ±4% output voltage tolerance over line/load/temperature, thermal shutdown, cycle-by-cycle current limiting, and TTL-compatible ON/OFF control. It delivers high efficiency-up to 88% at 18 V input and 3.0 A load-for compact DC-DC conversion in industrial power supplies.
For engineers reviewing the LM2576D2T-015 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 3.0 A output current, 7.0–40 V input range, 14.25–15.75 V output voltage window across −40 °C to +125 °C, and D2PAK thermal resistance of 5.0 °C/W junction-to-case.
Technical Context
The LM2576D2T-015 integrates a 1.0 A NPN switch with 1.5 V typical saturation voltage, error amplifier referenced to 1.23 V bandgap, and fixed-frequency PWM controller operating at 52 kHz (±10%). Its feedback loop uses internal resistor divider for fixed 15 V output, eliminating external programming resistors.
Protection architecture includes cycle-by-cycle peak current limiting (4.2–7.5 A), thermal shutdown at ~150 °C, and logic-controlled shutdown with 80 µA standby current. The device operates in continuous conduction mode and requires only four external components: input capacitor, output capacitor, catch diode (e.g., MBR360), and inductor (e.g., 100 µH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 15 V fixed, ±4% tolerance (14.25–15.75 V) over −40 °C to +125 °C, 18–40 V input, 0.5–3.0 A load |
| Max Output Current | 3.0 A DC, limited by internal current sense and thermal design; requires heatsink for >1.5 A at high ambient |
| Input Voltage Range | 7.0 V to 40 V DC; minimum dropout ~2.5 V at full load due to switch saturation and diode drop |
| Oscillator Frequency | 52 kHz nominal (42–63 kHz over temperature); enables use of low-cost, standard inductors with minimal EMI filtering |
| Efficiency | 88% typical at Vin = 18 V, Iout = 3.0 A, Tj = 25 °C; reduces thermal load vs. linear regulators in high-input-voltage applications |
| Shutdown Current | 80 µA typical at TJ = 25 °C when ON/OFF pin ≥ 2.4 V; enables low-power system sleep modes |
| Thermal Resistance | 5.0 °C/W junction-to-case (D2PAK package); allows direct heatsink mounting to Pin 3 (GND) for high-power operation |
Pinout & Package
D2PAK (TO-263) package, case 936A, with heatsink surface electrically connected to Pin 3 (GND). Requires PCB copper area for thermal dissipation; Pin 2 (Output) trace minimized to reduce EMI coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 7–40 V unregulated DC; requires low-ESR 100 µF input capacitor placed near pin to suppress switching transients |
| 2 - Output | Emitter of internal NPN switch | Drives inductor; 1.5 V typical saturation voltage limits dropout; PCB copper area must be minimized to avoid noise coupling into sensitive circuits |
| 3 - GND | Circuit ground & thermal pad | Common return for all currents; heatsink surface (terminal 6 in outline) is internally tied to this pin for thermal management |
| 4 - Feedback | Regulation sense input | Internally connected to 15 V divider; not accessible externally-no external resistor network required for fixed-output version |
| 5 - ON/OFF | Logic-enable control | TTL-compatible: <1.0 V (min) = ON; >2.4 V (min) = OFF; 80 µA standby current when held high |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 15 V output | Eliminates external feedback resistors-reduces BOM count, layout complexity, and temperature drift vs. adjustable versions |
| Integrated protection | Combines cycle-by-cycle current limiting, thermal shutdown, and safe-start logic to prevent damage during overload or short-circuit events |
| High-efficiency buck topology | 88% efficiency at 18 V → 15 V / 3 A enables compact thermal design without forced air or large heatsinks in most industrial enclosures |
| Standard inductor compatibility | 52 kHz switching frequency aligns with widely available, low-cost 100 µH pulse inductors (e.g., Pulse PE-92108) optimized for LM2576 series |
| D2PAK thermal performance | 5.0 °C/W junction-to-case resistance supports >2 W continuous power dissipation with modest heatsinking-critical for 3 A loads at high Vin |
Applications
| Industrial PLC Power Supply | Automotive Aftermarket DC-DC Converter |
|---|---|
|
Use Scenario: Providing regulated 15 V rail from 12–24 V vehicle battery to power programmable logic controllers and I/O modules. IC Role / Device Role / Timing Role: Primary step-down regulator converting variable automotive input to stable 15 V output with wide line regulation (7–40 V). Use Value: 88% efficiency minimizes heat buildup in sealed enclosures; ON/OFF pin enables microcontroller-controlled power sequencing during ignition cycles. |
Use Scenario: Converting 24 V truck battery voltage to 15 V for legacy instrumentation or analog sensor interfaces. IC Role / Device Role / Timing Role: Fixed-output buck converter delivering 3.0 A with built-in current limiting to survive load dumps and cold-crank transients. Use Value: Thermal shutdown and 40 V max input rating ensure reliability under automotive load dump conditions (ISO 7637-2 Pulse 5a); D2PAK package withstands vibration and thermal cycling. |
| Telecom Remote Radio Unit (RRU) | Factory Automation Sensor Hub |
|
Use Scenario: Generating 15 V bias for RF power amplifiers and analog front-end circuitry in outdoor base station equipment. IC Role / Device Role / Timing Role: High-current, high-efficiency pre-regulator feeding low-noise LDOs; operates continuously across −40 °C to +85 °C ambient. Use Value: ±4% output tolerance ensures stable amplifier biasing; 52 kHz fixed frequency simplifies EMI filter design versus variable-frequency alternatives. |
Use Scenario: Powering multiple 15 V analog sensors (e.g., pressure transducers, RTD conditioners) from a centralized 24 V factory bus. IC Role / Device Role / Timing Role: Centralized DC-DC converter supplying isolated 15 V rails with robust short-circuit protection for multi-sensor nodes. Use Value: Cycle-by-cycle current limiting prevents latch-up during sensor cable faults; 3.0 A rating supports up to 12× 15 V/100 mA sensors per channel. |
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 | TO-220 package (case 314D); higher RJA = 65 °C/W vs. D2PAK's 70 °C/W; identical electrical specs | Lower thermal performance at >1.2 A continuous load; requires larger heatsink or forced airflow | Select LM2576D2T-015 for space-constrained or high-ambient designs needing superior thermal resistance. |
| MP1584EN-LF-Z | 42 V input, 3 A sync buck; 1.5 MHz switching; smaller solution size but higher EMI; no integrated catch diode | Requires external MOSFET and gate driver; better for compact PCBs but demands careful layout for stability | Choose LM2576D2T-015 when proven reliability, minimal external parts, and ease of qualification outweigh size constraints. |
Compared with LM2576T-15 and MP1584EN-LF-Z, the LM2576D2T-015 offers best-in-class thermal resistance for 3 A operation in D2PAK, eliminates external diode requirements, and provides mature, automotive-qualified performance-making it optimal for ruggedized industrial and transportation power systems where long-term availability and design simplicity are critical.
Availability
LM2576D2T-015 is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive aftermarket converters, telecom remote radio units, and factory automation sensor hubs requiring stable component supply and long-lifecycle support.
Supply support for LM2576D2T-015 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 (Nasdaq: ON) is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The LM2576 series was designed as a cost-optimized, easy-to-use monolithic buck regulator family targeting industrial and embedded power conversion where reliability, thermal robustness, and minimal external component count are essential.
FAQ
What is the maximum input voltage rating for the LM2576D2T-015?
The LM2576D2T-015 has an absolute maximum input voltage rating of 45 V, with recommended operating input range of 7.0 V to 40 V DC. Exceeding 45 V may cause permanent damage. For reliable operation under transient conditions like automotive load dump, derating to ≤36 V is advised. The LM2576D2T-015 datasheet specifies 40 V as the maximum operating supply voltage.
Does the LM2576D2T-015 require an external feedback resistor network?
No, the LM2576D2T-015 does not require external feedback resistors. As a fixed 15 V output variant, it uses an internal precision resistor divider referenced to the 1.23 V bandgap. This eliminates component count, layout sensitivity, and temperature drift associated with external resistor networks-unlike the adjustable LM2576-ADJ version.
What is the thermal resistance and heatsink requirement for the LM2576D2T-015 at 3.0 A load?
The LM2576D2T-015 has a junction-to-case thermal resistance (RθJC) of 5.0 °C/W. At 3.0 A output with 18 V input, power dissipation is ~2.1 W; with 25 °C ambient and 10 °C/W heatsink resistance, junction temperature reaches ~102 °C-within the 150 °C limit. A minimum 25 cm² copper pour on inner layers is recommended for standalone operation.
Can the LM2576D2T-015 be used in synchronous rectification configurations?
No, the LM2576D2T-015 cannot be used in synchronous rectification configurations. It integrates a single NPN bipolar transistor as the main switch and relies on an external Schottky catch diode (e.g., MBR360). Synchronous operation requires a second actively controlled MOSFET, which the LM2576D2T-015 does not support or drive.
Is the LM2576D2T-015 RoHS-compliant and halogen-free?
Yes, the LM2576D2T-015 is RoHS-compliant and halogen-free per onsemi's product compliance documentation. The "D2T" suffix indicates Pb-free (lead-free) packaging, and the device meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1-unsuitable for reflow without baking only if exposed to ambient >30 °C/60% RH for >168 hours.
LM2576D2T-015 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- 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:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
LM2576D2T-015 FAQ
1.How can I place an order for LM2576D2T-015 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2576D2T-015 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 LM2576D2T-015 reliable?
The price and inventory of LM2576D2T-015 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2576D2T-015 is usually 5 days.
3.What payment methods are accepted for LM2576D2T-015?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2576D2T-015 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2576D2T-015?
LM2576D2T-015 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2576D2T-015 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 LM2576D2T-015?
For technical support, including LM2576D2T-015 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2576D2T-015 requirements.
6.How does Aetrix verify that LM2576D2T-015 is sourced from the original manufacturer or authorized distributors?
All LM2576D2T-015 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 LM2576D2T-015 meets industry standards.
7.What is the process for return or replacement of LM2576D2T-015?
All LM2576D2T-015 units undergo pre-shipment inspection (PSI). If there is an issue with LM2576D2T-015, 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 LM2576D2T-015 part is unused and in its original packaging.
Return procedure for LM2576D2T-015:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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