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onsemi LM2575TV-012G
- Part No.:
- LM2575TV-012G
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2575TV-012G.pdf
- Description:
- IC REG BUCK 12V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:186
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Product details
Overview
LM2575TV-012G from onsemi is a monolithic step-down (buck) switching regulator IC delivering 1.0 A output current with fixed 12 V output, 52 kHz internal oscillator frequency, ±4% output voltage tolerance over line and load, and wide 4.75 V to 40 V input range. It integrates a 1.0 A switch, thermal shutdown, cycle-by-cycle current limiting, and TTL-compatible ON/OFF control - used in industrial power supplies, battery chargers, and on-card DC-DC conversion.
For engineers reviewing the LM2575TV-012G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.0 A output capability, TO-220-5 package with heatsink-connected ground pin, fixed 12 V output without external feedback resistors, and compatibility with standard 330 µH inductors and Schottky catch diodes like 1N5819.
Technical Context
The LM2575TV-012G implements a voltage-mode controlled buck converter architecture with a fixed 52 kHz oscillator, internal 1.235 V bandgap reference, and error amplifier driving a 1.0 A NPN switch. Its feedback loop is internally configured for 12 V output using a precision resistor divider, eliminating external programming components.
Protection features include cycle-by-cycle current limiting (typ. 2.3 A peak), thermal shutdown at ~150 °C junction temperature, and 80 µA standby quiescent current when the ON/OFF pin is pulled high. The device operates across −40 °C to +125 °C junction temperature and supports input voltages up to 40 V with no minimum load requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over full line/load/temperature range - eliminates need for external feedback resistors and simplifies layout. |
| Output Current | Guaranteed 1.0 A continuous - supports medium-power loads without external current boosting. |
| Input Voltage Range | 4.75 V to 40 V - enables direct operation from 12 V, 24 V, or unregulated adapter rails. |
| Oscillator Frequency | 52 kHz ±10% (±2% from 0 °C to 125 °C) - balances EMI performance and inductor size; reduces filter component count vs higher-frequency alternatives. |
| Efficiency | 88% typical at Vin = 15 V, IOUT = 1.0 A - significantly exceeds linear regulators under same conditions, minimizing thermal management needs. |
| Standby Quiescent Current | 80 µA typical at TJ = 25 °C - enables low-power shutdown mode for energy-sensitive systems. |
| Thermal Resistance | RJC = 5.0 °C/W - allows effective heatsinking via Pin 3 (ground/heatsink tab) in TO-220 package. |
Pinout & Package
LM2575TV-012G uses the TO-220-5 (Case 314B) package with exposed metal tab thermally and electrically connected to Pin 3 (GND). The heatsink surface must be mounted to a PCB copper pour or external heatsink for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 4.75–40 V unregulated DC; requires local 100 µF low-ESR input capacitor to suppress switching transients. |
| 2 - Output | Emitter of internal NPN switch | Delivers regulated 12 V; saturation voltage ≤1.2 V at 1.0 A ensures low conduction loss; PCB copper area must be minimized to reduce EMI coupling. |
| 3 - GND | Circuit ground / heatsink connection | Reference node for all internal circuitry; metal tab is electrically tied to this pin - must be soldered to large copper plane for thermal dissipation. |
| 4 - Feedback | Internal voltage divider output | Internally connected to 12 V divider; not accessible externally - no external resistor network required for fixed-output operation. |
| 5 - ON/OFF | TTL-compatible enable/disable control | Logic-high (>2.2 V) disables regulator and reduces input current to ~80 µA; logic-low (<1.2 V) enables operation. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12 V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity while maintaining ±4% regulation accuracy. |
| Integrated 1.0 A switch | Reduces external component count and avoids discrete transistor selection, gate drive, and protection design effort. |
| Thermal shutdown & current limit | Provides autonomous fault recovery without external sensing circuitry - protects against overload, short-circuit, and ambient overheating. |
| 52 kHz fixed-frequency operation | Enables use of low-cost, high-saturation-current off-the-shelf inductors (e.g., 330 µH) and simplifies EMI filtering versus variable-frequency controllers. |
| TTL shutdown interface | Allows microcontroller or system-level logic to disable regulator with <10 µA input leakage, supporting low-power sleep modes. |
Applications
| Industrial Power Supply | Battery Charger Front-End |
|---|---|
|
Use Scenario: Converting 24 V rail to stable 12 V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated 12 V bias for analog front-ends and digital logic. Use Value: Delivers 1.0 A with 88% efficiency at 15 V input, reducing heat sink size by >50% versus linear alternatives. |
Use Scenario: Pre-regulating automotive alternator output (13.8–14.4 V) before linear charging stage for sealed lead-acid batteries. IC Role / Device Role / Timing Role: Efficient pre-regulator that maintains constant 12 V despite input ripple and transient spikes. Use Value: Withstands 40 V max input and provides ±4% output stability across −40 °C to +125 °C - critical for under-hood reliability. |
| On-Card DC-DC Conversion | Positive-to-Negative Converter |
|
Use Scenario: Generating local 12 V from 28 V avionics bus on embedded flight control boards. IC Role / Device Role / Timing Role: Compact, single-chip buck solution replacing multi-component discrete designs. Use Value: TO-220-5 package with heatsink tab enables conduction cooling in space-constrained enclosures without forced airflow. |
Use Scenario: Configured as inverting buck-boost to generate −12 V from +12 V input for op-amp dual-rail supplies. IC Role / Device Role / Timing Role: Switching controller repurposed with external inductor/diode topology to invert polarity. Use Value: Leverages same 52 kHz oscillator and current-limit protection - validated in datasheet Figure 1 application note. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575T-12 | Same electrical specs and TO-220-5 package; differs only in marking convention (no "G" suffix) and MSL rating (MSL 1 vs unspecified). | No functional difference; identical pinout, thermal behavior, and operating conditions. | Select LM2575T-12 if RoHS compliance documentation or legacy procurement alignment is prioritized over Pb-free marking. |
| MP1584EN-LF-Z | Higher 1.5 A output, 1.5 MHz switching frequency, smaller SOP-8 package; lacks integrated heatsink tab and requires external compensation. | Better suited for compact, high-density layouts but demands careful loop stability design and higher-cost ceramic inductors. | Choose MP1584EN-LF-Z only when board space is constrained and 1.5 MHz operation justifies added design complexity and cost. |
Compared with LM2575T-12, the LM2575TV-012G offers verified Pb-free compliance and explicit MSL 1 handling; versus MP1584EN-LF-Z, it trades higher frequency for simpler magnetics, lower EMI, and robust thermal performance via TO-220 heatsinking - ideal for industrial and automotive environments where reliability outweighs miniaturization.
Availability
LM2575TV-012G is available at Aetrix Electronics and suitable for industrial power supplies, battery charger front-ends, and on-card DC-DC conversion requiring stable component supply, long-term lifecycle support, and automotive-grade thermal robustness.
Supply support for LM2575TV-012G 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 innovation for automotive, industrial, cloud, and IoT applications.
The LM2575 series was designed as a cost-optimized, easy-to-implement buck regulator family targeting medium-power industrial and automotive power conversion - emphasizing minimal external components, thermal resilience, and broad input voltage tolerance.
FAQ
What is the maximum input voltage rating for the LM2575TV-012G?
The LM2575TV-012G has an absolute maximum input voltage rating of 45 V, with recommended continuous operation up to 40 V. Exceeding 45 V risks permanent damage. The device maintains regulation across its full 4.75 V to 40 V input range, making it suitable for 24 V industrial buses and automotive applications with load-dump transients suppressed externally.
Does the LM2575TV-012G require external feedback resistors to set the output voltage?
No. The LM2575TV-012G is a fixed-output variant with internal resistor divider configured for 12 V. Pin 4 (Feedback) is not user-accessible - unlike the adjustable LM2575ADJ, it requires zero external resistors, simplifying design and improving output accuracy and temperature stability.
How is thermal management handled on the LM2575TV-012G?
The LM2575TV-012G uses a TO-220-5 package where Pin 3 (GND) is electrically and thermally connected to the exposed metal tab. Effective thermal management requires soldering this tab to a large PCB copper pour or attaching an external heatsink. With RJC = 5.0 °C/W, proper heatsinking keeps junction temperature within −40 °C to +125 °C limits even at full 1.0 A load.
Can the LM2575TV-012G be used in a negative-output (inverting) configuration?
Yes. As documented in the LM2575 datasheet (Figure 1 application), the LM2575TV-012G can be wired as a positive-to-negative buck-boost converter to generate −12 V from a +12 V input. This requires repositioning the inductor and diode per the inverting topology - the IC's internal switch and protection features remain fully functional in this mode.
What is the typical efficiency of the LM2575TV-012G at full load?
The LM2575TV-012G achieves 88% typical efficiency at VIN = 15 V, IOUT = 1.0 A, and TJ = 25 °C. Efficiency remains above 85% across 12–24 V inputs at full load. This high efficiency directly reduces power dissipation - enabling operation without a heatsink in many low-airflow applications.
LM2575TV-012G 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
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- 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
LM2575TV-012G FAQ
1.How can I place an order for LM2575TV-012G through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575TV-012G 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 LM2575TV-012G reliable?
The price and inventory of LM2575TV-012G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575TV-012G is usually 5 days.
3.What payment methods are accepted for LM2575TV-012G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575TV-012G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575TV-012G?
LM2575TV-012G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575TV-012G 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 LM2575TV-012G?
For technical support, including LM2575TV-012G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575TV-012G requirements.
6.How does Aetrix verify that LM2575TV-012G is sourced from the original manufacturer or authorized distributors?
All LM2575TV-012G 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 LM2575TV-012G meets industry standards.
7.What is the process for return or replacement of LM2575TV-012G?
All LM2575TV-012G units undergo pre-shipment inspection (PSI). If there is an issue with LM2575TV-012G, 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 LM2575TV-012G part is unused and in its original packaging.
Return procedure for LM2575TV-012G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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