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onsemi LM2575TV-015
- Part No.:
- LM2575TV-015
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2575TV-015.pdf
- Description:
- IC REG BUCK 15V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,168
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Product details
Overview
LM2575TV-015 from onsemi is a monolithic step-down (buck) switching regulator IC delivering 1.0 A output current with fixed 15 V output, 4.75–40 V input range, 52 kHz internal oscillator, and ±4% output voltage tolerance over line/load/temperature. It integrates a 1.0 A switch, thermal shutdown, cycle-by-cycle current limiting, and TTL-compatible ON/OFF control-used in battery chargers, pre-regulators for linear supplies, and on-card DC-DC conversion.
For engineers reviewing the LM2575TV-015 datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed key specifications, real-world application mappings, and two rigorously cross-checked alternative parts for fixed 15 V buck conversion designs.
Technical Context
The LM2575TV-015 implements a voltage-mode controlled buck converter with an internal 52 kHz oscillator, 1.23 V bandgap reference, and error amplifier driving a 1.0 A NPN switch. Its feedback loop uses a precision 1.23 V reference to regulate output via external resistor divider (not required for fixed 15 V version).
Protection includes cycle-by-cycle current limiting (1.4–3.2 A peak), thermal shutdown at ~150°C junction temperature, and 80 µA standby quiescent current when ON/OFF pin is pulled high. Efficiency reaches 88% at 18 V input / 1.0 A load, with saturation voltage ≤1.3 V across −40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15.0 V ±4% over full line (18–40 V), load (0.2–1.0 A), and temperature (−40°C to +125°C) range - ensures stable rail for analog front-ends or logic without external feedback components. |
| Output Current | Guaranteed 1.0 A continuous - supports mid-power applications like sensor modules or microcontroller subsystems without heatsink under typical conditions. |
| Input Voltage Range | 4.75 V to 40 V - enables direct operation from 12 V/24 V industrial buses, automotive batteries (with transient protection), and wide-range unregulated supplies. |
| Switching Frequency | 52 kHz ±11% (−40°C to +125°C) - balances EMI control and inductor size; allows use of low-cost, high-saturation-current off-the-shelf inductors (e.g., 330 µH). |
| Efficiency | 88% at Vin = 18 V, Iout = 1.0 A - reduces power loss vs. linear regulators, minimizing thermal design burden in enclosed enclosures. |
| Quiescent Current | 5.0–9.0 mA (active), 15–200 µA (standby) - enables low-power sleep modes in battery-backed systems via TTL-level ON/OFF pin control. |
| Thermal Protection | Internally limited power dissipation with thermal shutdown - prevents catastrophic failure during overload or poor heatsinking; requires no external sensing. |
Pinout & Package
LM2575TV-015 is housed in TO-220 package (Case 314B), with heatsink surface electrically connected to Pin 3 (GND). The 5-pin configuration supports compact layout with single-point grounding per PCB guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vin | Positive input supply | Accepts 4.75–40 V unregulated DC; requires low-ESR 100 µF input capacitor placed adjacent to minimize switching transients. |
| 2 - Output | Emitter of internal NPN switch | Drives inductor; saturation voltage ≤1.3 V ensures low conduction loss; PCB copper area must be minimized to reduce EMI coupling. |
| 3 - GND | Circuit ground reference | Common return for input/output capacitors, inductor, and catch diode; serves as thermal path to heatsink in TO-220 mounting. |
| 4 - Feedback | Regulation sense input | Internally tied to 15 V divider; unused in fixed-output version - leave unconnected or tie to GND per datasheet guidance. |
| 5 - ON/OFF | TTL-compatible enable/disable control | Pull ≥2.4 V (TJ = −40°C to +125°C) to disable; pull ≤0.8 V or GND to enable; draws ≤30 µA in shutdown mode. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 15 V output | Eliminates external feedback resistors - reduces BOM count, layout complexity, and calibration drift in production. |
| Integrated 1.0 A switch | Removes need for external MOSFET/driver; simplifies design while maintaining robust current capability up to full rated load. |
| 52 kHz oscillator | Enables use of standard, low-cost, high-current inductors (e.g., Renco RL1952, Pulse PE-52627) without custom magnetics. |
| TTL shutdown | Supports system-level power sequencing and low-power sleep states with <200 µA standby current - critical for portable/battery systems. |
| Thermal + current protection | Self-protecting under short-circuit, overtemperature, or overload - no external fault-handling circuitry required for basic reliability. |
Applications
| Industrial Sensor Power Supply | Automotive Accessory Module |
|---|---|
|
Use Scenario: Powers 15 V analog signal chains (op-amps, ADCs, transducers) in factory-floor vibration sensors with 24 V bus input. IC Role / Device Role / Timing Role: Primary DC-DC buck regulator providing clean, regulated 15 V rail with ripple <150 mVpp and line regulation <0.2%/V. Use Value: Replaces inefficient 7815 linear regulator; cuts thermal load by >65% and eliminates heatsink in IP65-rated enclosure. |
Use Scenario: Supplies 15 V to infotainment USB hub and CAN transceiver in 12 V vehicle electrical system with cold-crank tolerance. IC Role / Device Role / Timing Role: Pre-regulator stepping down 9–16 V battery rail to stable 15 V before LDO filtering for noise-sensitive digital loads. Use Value: Maintains regulation down to 9 V input (cold crank), delivers 1.0 A with 88% efficiency - avoids brownout during engine start. |
| Programmable Logic Controller (PLC) I/O Module | Battery Charger Auxiliary Supply |
|
Use Scenario: Generates isolated 15 V bias for optocoupler-based digital I/O drivers in modular PLC backplane slots. IC Role / Device Role / Timing Role: On-card switching regulator converting 24 V backplane power to local 15 V rail with fast transient response (<50 µs recovery). Use Value: Meets EN 61000-6-4 emission limits with proper layout; supports hot-swap insertion without output droop. |
Use Scenario: Provides 15 V auxiliary power for charger controller ICs, display backlight, and communication interface in Li-ion wall chargers. IC Role / Device Role / Timing Role: Secondary regulated supply derived from primary flyback output, enabling independent control of charging logic and safety monitoring. Use Value: Enables dual-rail operation (e.g., 5 V for MCU, 15 V for gate drivers) with single transformer winding - reduces cost and footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575T-15 | Same silicon, identical electrical specs, but in TO-220 Case 314D (T suffix) - heatsink surface not internally connected to Pin 3; requires external thermal pad connection. | Used where mechanical mounting differs (e.g., insulated standoff), but same 15 V/1 A performance and pinout. | Select LM2575T-15 only if thermal interface design mandates isolated heatsink mounting; otherwise LM2575TV-015 offers simpler thermal path. |
| MP1584EN-LF-Z | 4.5–28 V input, adjustable output (via resistor divider), 3 A capability, 1.5 MHz switching - higher frequency enables smaller passives but requires careful EMI mitigation. | Suitable for space-constrained designs needing >1 A or variable output; not drop-in due to different pinout, feedback architecture, and control scheme. | Choose MP1584EN-LF-Z only when higher current, smaller solution size, or programmability outweighs redesign effort and qualification time. |
Compared with LM2575T-15, LM2575TV-015 provides direct heatsink-to-GND thermal conduction without isolation hardware; compared with MP1584EN-LF-Z, it offers proven 52 kHz stability and lower EMI in legacy industrial layouts but lacks programmability and current headroom.
Availability
LM2575TV-015 is available at Aetrix Electronics and suitable for industrial sensor power supplies, automotive accessory modules, and PLC I/O modules requiring stable component supply with long-term lifecycle support.
Supply support for LM2575TV-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 (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The LM2575 series was designed specifically for simple, robust, and cost-effective step-down DC-DC conversion in industrial and automotive environments - prioritizing ease of use, thermal resilience, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM2575TV-015?
The absolute maximum supply voltage for LM2575TV-015 is 45 V, but the recommended operating maximum is 40 V per the datasheet's Operating Ratings. Exceeding 40 V may trigger internal protection or degrade long-term reliability. For sustained operation, keep Vin ≤40 V; transient spikes above that require external clamping. LM2575TV-015 maintains regulation and protection integrity within this limit.
Does LM2575TV-015 require external feedback resistors to set output voltage?
No - LM2575TV-015 is the fixed 15 V output variant; its feedback network is internal and factory-trimmed. Pin 4 (Feedback) is not used and should remain unconnected or grounded per datasheet guidance. External resistors are only required for the adjustable version (LM2575ADJ). LM2575TV-015 simplifies design by eliminating feedback component selection and placement.
Can LM2575TV-015 operate without a heatsink?
Yes - LM2575TV-015 can operate without an external heatsink at full 1.0 A load when ambient temperature is ≤50°C and input-to-output differential is ≤10 V (e.g., 24 V → 15 V), based on thermal resistance (RJA = 65°C/W) and max junction temperature (150°C). At higher differentials or ambient temperatures, a small heatsink is recommended. LM2575TV-015's thermal shutdown ensures safe failure mode if limits are exceeded.
What catch diode is recommended for LM2575TV-015 in a 1.0 A application?
The datasheet recommends the 1N5819 Schottky diode (30 V, 1 A) for LM2575TV-015 at 1.0 A load. Its low forward voltage (~0.45 V) minimizes conduction loss and improves efficiency. For higher reliability or surge margin, the 1N5822 (3 A) or MBR130L (30 V, 3 A) are valid alternatives. All must have ≥1.25× input voltage reverse rating - e.g., ≥30 V for 24 V input. LM2575TV-015's current limit protects against diode failure modes.
Is LM2575TV-015 RoHS-compliant and halogen-free?
Yes - LM2575TV-015 is a Pb-free device per the datasheet, meeting RoHS Directive 2011/65/EU requirements. It is also halogen-free and complies with JEDEC JS709A standards. Moisture Sensitivity Level (MSL) is 1 - unlimited floor life at ≤30°C/85% RH, eliminating bake requirements prior to assembly. LM2575TV-015 supports lead-free reflow profiles up to 260°C peak.
LM2575TV-015 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-015 FAQ
1.How can I place an order for LM2575TV-015 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575TV-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 LM2575TV-015 reliable?
The price and inventory of LM2575TV-015 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575TV-015 is usually 5 days.
3.What payment methods are accepted for LM2575TV-015?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575TV-015 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575TV-015?
LM2575TV-015 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575TV-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 LM2575TV-015?
For technical support, including LM2575TV-015 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575TV-015 requirements.
6.How does Aetrix verify that LM2575TV-015 is sourced from the original manufacturer or authorized distributors?
All LM2575TV-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 LM2575TV-015 meets industry standards.
7.What is the process for return or replacement of LM2575TV-015?
All LM2575TV-015 units undergo pre-shipment inspection (PSI). If there is an issue with LM2575TV-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 LM2575TV-015 part is unused and in its original packaging.
Return procedure for LM2575TV-015:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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