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onsemi LM2576TV-5G
- Part No.:
- LM2576TV-5G
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2576TV-5G.pdf
- Description:
- IC REG BUCK 5V 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
LM2576TV-5G from onsemi is a monolithic 3.0 A, 5.0 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, battery charger pre-regulators, and embedded DC-DC conversion.
For engineers reviewing the LM2576TV-5G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 3.0 A output current, 77% typical efficiency at 12 VIN/3.0 A, 1.5 V typical switch saturation voltage, −40 °C to +125 °C operating junction temperature, and compatibility with standard off-the-shelf 100 µH inductors.
Technical Context
The LM2576TV-5G integrates a 3.0 A NPN power switch, 1.235 V bandgap reference, error amplifier, 52 kHz oscillator, and PWM comparator in a single TO-220-5 package. Its feedback loop senses output voltage via Pin 4 (Feedback), comparing it to the internal 1.235 V reference to regulate duty cycle.
It employs voltage-mode control with fixed-frequency operation and includes self-protection features: thermal shutdown triggers at ~150 °C junction temperature, and current limit activates at 4.2–6.9 A (peak, depending on temperature). Standby quiescent current is 80 µA typical when ON/OFF pin is pulled high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over −40 °C to +125 °C, 0.5–3.0 A load, 8–40 V input - ensures stable logic supply without external resistors. |
| Max Output Current | Guaranteed 3.0 A DC load - supports high-current microcontroller rails or motor driver pre-biasing. |
| Input Voltage Range | 7.0 V to 40 V - accommodates 12 V/24 V industrial buses and wide-range unregulated inputs. |
| Switching Frequency | 52 kHz (±10% over temp) - enables use of low-cost, high-saturation-current inductors with minimal EMI filtering. |
| Efficiency | 77% typical at 12 VIN, 3.0 A load - reduces thermal load vs. linear regulators, often eliminating heatsink requirements. |
| Quiescent Current | 5.0–9.0 mA active, 80 µA standby - enables low-power shutdown mode for battery-backed systems. |
| Protection Features | Cycle-by-cycle current limiting, thermal shutdown, and under-voltage lockout - prevents damage during overload or short-circuit events. |
Pinout & Package
LM2576TV-5G uses the TO-220-5 (Case 314B) package with heatsink surface electrically connected to Pin 3 (GND). The tab is not isolated and must be mounted to a grounded heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 7–40 V unregulated DC; requires local 100 µF low-ESR capacitor to suppress switching transients. |
| 2 - Output | Emitter of internal NPN switch | Delivers regulated 5.0 V; PCB copper area must be minimized to reduce coupling into sensitive analog circuits. |
| 3 - GND | Circuit ground reference | Common return for input/output capacitors, diode cathode, and heatsink; single-point grounding recommended. |
| 4 - Feedback | Voltage sense input | Internally tied to 5.0 V output divider; unused in fixed-version - leave unconnected per datasheet. |
| 5 - ON/OFF | Logic-enable control | TTL-compatible: <1.4 V = ON, >2.2 V = OFF; draws only 15–30 µA when high - ideal for microcontroller shutdown control. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0 V output | Eliminates external feedback resistors - simplifies BOM and layout for cost-sensitive 5 V rail generation. |
| 3.0 A guaranteed output | Supports full-load operation without derating at 25 °C ambient - verified across temperature and input range. |
| 52 kHz fixed-frequency oscillator | Enables predictable EMI spectrum and consistent inductor sizing - avoids variable-frequency jitter in noise-sensitive systems. |
| TTL shutdown capability | Reduces total input current to 80 µA typical - extends battery life in portable equipment with sleep modes. |
| Integrated protection | Thermal shutdown and cycle-by-cycle current limiting prevent latch-up or destruction during fault conditions. |
Applications
| Industrial Power Supply | Embedded System DC-DC Conversion |
|---|---|
|
Use Scenario: Converting 24 V factory bus to stable 5 V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, ripple-controlled 5 V rail with high efficiency and thermal resilience. Use Value: Delivers 3.0 A continuously at 77% efficiency, reducing heat sink size and enabling compact DIN-rail mount designs. |
Use Scenario: Generating clean 5 V for ARM Cortex-M7 MCU, Ethernet PHY, and USB peripherals on a single-board computer. IC Role / Device Role / Timing Role: Main system power regulator with ON/OFF control synchronized to host processor sleep states. Use Value: 80 µA standby current and fast wake-up enable low-power operation without external LDO post-regulation. |
| Battery Charger Pre-Regulator | On-Card Switching Regulator |
|
Use Scenario: Stepping down 36 V LiFePO₄ pack voltage to 5 V for charging circuitry and status LEDs in portable tools. IC Role / Device Role / Timing Role: High-input-voltage pre-regulator preceding linear charger ICs to minimize power loss and thermal stress. Use Value: Operates up to 40 V input with 77% efficiency - cuts dissipation by >60% versus linear pre-regulation at 3 A. |
Use Scenario: Local 5 V generation on a motor drive board where space constraints prohibit external DC-DC modules. IC Role / Device Role / Timing Role: Compact, self-contained buck converter integrated directly onto the main PCB with minimal external components. Use Value: Requires only 4 external parts (input cap, output cap, inductor, catch diode) - accelerates design and reduces bill-of-materials count. |
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 | Same electrical specs; TO-220-5 package but Pb-free finish and MSL 1 rating per onsemi - identical thermal and electrical behavior. | No functional difference; suitable for RoHS-compliant production requiring lead-free assembly. | Select LM2576T-5.0 when Pb-free compliance is mandatory and MSL 1 handling is required. |
| MP1584EN-LF-Z | Higher 4.0 A current rating, 1.5 MHz switching frequency, smaller SOIC-8 package - requires different inductor/capacitor values and layout. | Better suited for space-constrained designs needing higher efficiency above 1 A, but demands careful EMI mitigation. | Choose MP1584EN-LF-Z only when footprint reduction and higher frequency operation justify redesign effort. |
Compared with LM2576TV-5G, LM2576T-5.0 offers identical performance with RoHS compliance, while MP1584EN-LF-Z trades proven ruggedness and design simplicity for higher integration density and frequency - making LM2576TV-5G optimal for industrial reliability and ease of qualification.
Availability
LM2576TV-5G is available at Aetrix Electronics and suitable for industrial power supplies, embedded system DC-DC conversion, and battery charger pre-regulators requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2576TV-5G 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 sensing technologies for automotive, industrial, and cloud infrastructure markets.
The LM2576 series was designed specifically for robust, low-component-count buck conversion in harsh environments - targeting industrial controls, telecom power, and battery-powered equipment where reliability and thermal resilience are critical.
FAQ
What is the maximum input voltage rating for LM2576TV-5G?
The LM2576TV-5G has an absolute maximum input voltage rating of 45 V, but its specified operating range is 7.0 V to 40 V. Operation above 40 V may cause excessive power dissipation or instability. For reliable long-term use, keep input voltage ≤40 V as defined in the Electrical Characteristics table - this ensures guaranteed 3.0 A output and ±4% regulation for LM2576TV-5G.
Does LM2576TV-5G require external feedback resistors?
No. The LM2576TV-5G is the fixed 5.0 V output version - its internal resistor divider sets the output voltage, so Pins 4 (Feedback) and 2 (Output) are internally connected. External resistors are unnecessary and must not be added; Pin 4 should remain unconnected per the datasheet. This distinguishes LM2576TV-5G from the adjustable LM2576ADJ variant.
What is the thermal resistance of LM2576TV-5G in TO-220-5 package?
The LM2576TV-5G in Case 314B (TO-220-5) has a junction-to-case thermal resistance (RJC) of 5.0 °C/W and a junction-to-ambient resistance (RJA) of 65 °C/W with standard PCB mounting. These values assume proper heatsinking to Pin 3 (GND tab); actual RJA improves significantly with an external heatsink - critical for sustaining 3.0 A continuous output in LM2576TV-5G designs.
Can LM2576TV-5G be used in negative voltage applications?
Yes - LM2576TV-5G can be configured as a positive-to-negative buck-boost converter (inverting topology) per Figure 1 in the datasheet. In that configuration, it generates −5 V from a positive input. However, the output polarity is inverted, feedback sensing changes, and external component values differ. The standard application remains positive 5 V output; LM2576TV-5G does not natively support negative output without circuit reconfiguration.
What catch diode is recommended for LM2576TV-5G in a 3.0 A application?
onsemi recommends the MBR360 Schottky diode for LM2576TV-5G at 3.0 A loads - rated for 60 V reverse voltage and 3.0 A average current, with low forward voltage (~0.6 V) to maximize efficiency. Per Table 1, alternatives include SR306 or SB560. All must meet ≥1.2× load current (≥3.6 A peak) and ≥1.25× max input voltage (≥50 V for 40 VIN) - critical for reliable operation of LM2576TV-5G.
LM2576TV-5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- 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):
- 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
LM2576TV-5G FAQ
1.How can I place an order for LM2576TV-5G through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2576TV-5G 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-5G reliable?
The price and inventory of LM2576TV-5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2576TV-5G is usually 5 days.
3.What payment methods are accepted for LM2576TV-5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2576TV-5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2576TV-5G?
LM2576TV-5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2576TV-5G 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-5G?
For technical support, including LM2576TV-5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2576TV-5G requirements.
6.How does Aetrix verify that LM2576TV-5G is sourced from the original manufacturer or authorized distributors?
All LM2576TV-5G 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-5G meets industry standards.
7.What is the process for return or replacement of LM2576TV-5G?
All LM2576TV-5G units undergo pre-shipment inspection (PSI). If there is an issue with LM2576TV-5G, 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-5G part is unused and in its original packaging.
Return procedure for LM2576TV-5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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