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onsemi LM2575TV-15G
- Part No.:
- LM2575TV-15G
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2575TV-15G.pdf
- Description:
- IC REG BUCK 15V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,366
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Product details
Overview
LM2575TV-15G from onsemi is a monolithic step-down (buck) switching regulator IC delivering fixed 15 V output at up to 1.0 A, with ±4% output voltage tolerance over line and load, 4.75–40 V input range, and 52 kHz fixed-frequency operation. 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 and battery charger pre-regulators.
For engineers reviewing the LM2575TV-15G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.0 A output current, fixed 15 V output without external feedback resistors, TO-220-5 package with heatsink-connected ground pin, and compatibility with standard off-the-shelf 330 µH inductors and Schottky catch diodes.
Technical Context
The LM2575TV-15G implements a voltage-mode controlled buck converter architecture with an internal 52 kHz oscillator, 1.235 V bandgap reference, and error amplifier driving a 1.0 A NPN switch. Its fixed-output topology eliminates external feedback resistors, simplifying design while maintaining regulation across −40°C to +125°C junction temperature.
Protection features include cycle-by-cycle current limiting (1.4–3.2 A peak), thermal shutdown, and 80 µA standby quiescent current when the ON/OFF pin is pulled high. The device operates with no heatsink required under typical 15 V/1.0 A conditions due to high efficiency (88% at Vin = 18 V, IOUT = 1.0 A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15 V ±4% over full line/load/temperature range - eliminates need for feedback resistor network. |
| Max Output Current | 1.0 A DC - supports medium-power loads such as microcontroller subsystems or sensor interfaces without external current boosting. |
| Input Voltage Range | 4.75 V to 40 V - enables direct use with 12 V, 24 V, and 36 V industrial or automotive battery inputs. |
| Switching Frequency | 52 kHz ±10% - allows use of low-cost, widely available 330 µH inductors and reduces EMI filtering complexity vs. MHz-range converters. |
| Efficiency | 88% at Vin = 18 V, IOUT = 1.0 A - significantly reduces thermal dissipation versus linear regulators, often eliminating heatsinks. |
| Quiescent Current | 5.0–9.0 mA active, 15–200 µA standby - enables low-power shutdown mode for energy-sensitive applications. |
| Thermal Resistance | RJC = 5.0 °C/W (TO-220) - enables predictable junction temperature rise with simple heatsinking or PCB copper area. |
Pinout & Package
LM2575TV-15G uses the TO-220-5 (Case 314B) package with heatsink surface electrically connected to Pin 3 (GND). The tab must be thermally and electrically tied to system ground for optimal thermal performance and noise immunity.
| 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 15 V; saturation voltage ≤1.3 V ensures low conduction loss; PCB copper area must be minimized to reduce EMI coupling. |
| 3 - GND | Circuit ground / heatsink connection | Common return for all internal circuits; metal tab is electrically tied to this pin - must be soldered to large ground plane or heatsink. |
| 4 - Feedback | Regulation sense input | Internally connected to 15 V divider; left unconnected in fixed-output versions - not used externally. |
| 5 - ON/OFF | TTL-compatible enable/disable control | Logic-high (>2.2 V) disables regulator, reducing input current to ~80 µA; logic-low (<1.2 V) enables operation. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 15 V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity while ensuring stable 15 V compliance per JEDEC specs. |
| Integrated 1.0 A switch | Reduces external component count to only four: input cap, output cap, inductor, and catch diode - accelerates prototyping and lowers cost. |
| 52 kHz fixed frequency | Enables use of low-cost, high-saturation-current toroidal or shielded drum-core inductors (e.g., Renco RL1952, Pulse PE-52627) without frequency drift concerns. |
| TTL shutdown capability | Supports microcontroller-driven power sequencing with <200 µA standby current - critical for battery-powered or low-power sleep modes. |
| Thermal + current protection | Self-protecting under overload or short-circuit: cycle-by-cycle current limit prevents MOSFET failure; thermal shutdown halts operation above 150°C junction. |
Applications
| Industrial Power Supply | Automotive Battery Charger Pre-regulator |
|---|---|
Use Scenario: Providing stable 15 V rail for PLC I/O modules operating from 24 V nominal battery or bus supply. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24 V±20% input to tightly regulated 15 V output for analog front-ends and digital logic. Use Value: Delivers 1.0 A continuously with 88% efficiency, minimizing heat buildup in enclosed cabinets and eliminating need for forced-air cooling. |
Use Scenario: Generating 15 V intermediate bus for multi-stage Li-ion battery charging circuitry in 12 V vehicle systems. IC Role / Device Role / Timing Role: Pre-regulator stage stepping down alternator-supplied 13.5–16 V to clean 15 V before linear post-regulation or charge controller IC input. Use Value: Maintains regulation during cold-crank (down to 6 V) via wide 4.75 V minimum input, and withstands load dump transients up to 40 V. |
| On-Card DC-DC Converter | Positive-to-Negative Buck-Boost Supply |
Use Scenario: Local 15 V generation on a motor control board where space prohibits external AC-DC adapter use. IC Role / Device Role / Timing Role: Compact, self-contained buck converter using TO-220-5 footprint and standard passive components. Use Value: Requires only four external parts (100 µF Cin, 330 µH L1, 1N5819 D1, 330 µF Cout) - simplifies layout and reduces bill-of-materials cost. |
Use Scenario: Generating −15 V rail from +15 V source for op-amp biasing in precision instrumentation. IC Role / Device Role / Timing Role: Reconfigured as inverting buck-boost converter using same external component set and fixed 15 V feedback node. Use Value: Leverages identical 52 kHz oscillator and current-limit architecture - no redesign needed beyond topology reconnection and polarity reversal. |
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-15 | Same electrical specs and pinout; differs only in RoHS compliance status and MSL rating (MSL 1 vs. MSL 3). | Identical functional use in industrial designs; LM2575T-15 may require moisture-sensitive handling per J-STD-020. | Select LM2575TV-15G for lead-free assembly and guaranteed MSL 1 reliability in high-humidity environments. |
| MP1584EN-LF-Z | Higher 1.5 A rating, 1.5 MHz switching, smaller SOIC-8 package; lacks integrated thermal shutdown latch and has different ON/OFF logic polarity. | Better suited for space-constrained, high-efficiency designs but requires revised layout, new inductor selection, and modified enable sequencing. | Choose MP1584EN-LF-Z only when board area or efficiency >90% is prioritized over drop-in replacement and legacy design continuity. |
Compared with LM2575T-15, LM2575TV-15G offers assured Pb-free compliance and enhanced moisture resistance; compared with MP1584EN-LF-Z, it provides proven thermal robustness and simpler external component requirements at the cost of lower switching frequency and power density.
Availability
LM2575TV-15G is available at Aetrix Electronics and suitable for industrial power supplies, automotive battery charger pre-regulators, and on-card DC-DC converters requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for LM2575TV-15G 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 electronics, with leadership in power management, analog, and sensing technologies.
The LM2575 series was designed for cost-sensitive, medium-power DC-DC conversion in industrial, automotive, and consumer applications - emphasizing simplicity, reliability, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM2575TV-15G?
The absolute maximum input voltage for LM2575TV-15G is 45 V, but the recommended operating maximum is 40 V per the datasheet's Operating Ratings. Exceeding 40 V risks violating safe operating area limits, especially under high ambient temperature or heavy load conditions. LM2575TV-15G maintains regulation from 4.75 V to 40 V, making it suitable for 24 V and 36 V industrial bus applications.
Does LM2575TV-15G require external feedback resistors?
No, LM2575TV-15G is a fixed-output version with internal resistor divider set for 15 V - Pin 4 (Feedback) is not connected externally and must remain unpopulated. This eliminates resistor tolerance errors and layout sensitivity, distinguishing it from the adjustable LM2575ADJ variant. LM2575TV-15G delivers 15 V ±4% across full line, load, and temperature ranges without any external programming components.
Can LM2575TV-15G be used in automotive applications?
Yes, LM2575TV-15G meets key automotive requirements: it operates from −40°C to +125°C junction temperature, withstands input transients up to 40 V (covering ISO 7637-2 pulse 5a), and is available in NCV2575 variants qualified to AEC-Q100. While LM2575TV-15G itself is not AEC-Q100 certified, its onsemi manufacturing process and robust thermal/current protection make it widely deployed in non-safety-critical automotive subsystems like infotainment power rails and body control modules.
What inductor value is recommended for LM2575TV-15G?
The standard inductor value for LM2575TV-15G is 330 µH, optimized for 1.0 A output and 52 kHz operation per Figure 20 of the datasheet. Recommended part numbers include Renco RL1952, Pulse PE-52627, and Coilcraft DO5022P-334. Inductor saturation current must exceed 1.5 A to accommodate peak currents during startup and transient load steps - LM2575TV-15G's internal current limit triggers at 1.4–3.2 A depending on temperature.
How does the ON/OFF pin function on LM2575TV-15G?
The ON/OFF pin (Pin 5) enables TTL-compatible shutdown: applying ≥2.2 V disables the internal switch, reducing total input current to ~80 µA; applying ≤1.2 V enables normal operation. The pin has low input current (<30 µA), allowing direct drive from microcontrollers or logic gates without buffering. LM2575TV-15G remains fully functional across −40°C to +125°C, with threshold voltages specified over full temperature range.
LM2575TV-15G 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):
- 15V
- 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-15G FAQ
1.How can I place an order for LM2575TV-15G through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575TV-15G 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-15G reliable?
The price and inventory of LM2575TV-15G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575TV-15G is usually 5 days.
3.What payment methods are accepted for LM2575TV-15G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575TV-15G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575TV-15G?
LM2575TV-15G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575TV-15G 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-15G?
For technical support, including LM2575TV-15G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575TV-15G requirements.
6.How does Aetrix verify that LM2575TV-15G is sourced from the original manufacturer or authorized distributors?
All LM2575TV-15G 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-15G meets industry standards.
7.What is the process for return or replacement of LM2575TV-15G?
All LM2575TV-15G units undergo pre-shipment inspection (PSI). If there is an issue with LM2575TV-15G, 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-15G part is unused and in its original packaging.
Return procedure for LM2575TV-15G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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