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onsemi LM2575TV-5G
- Part No.:
- LM2575TV-5G
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2575TV-5G.pdf
- Description:
- IC REG BUCK 5V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,963
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Product details
Overview
LM2575TV-5G from onsemi is a monolithic step-down (buck) switching regulator IC delivering fixed 5.0 V output at up to 1.0 A, with ±4% output voltage tolerance over line and load, 4.75 V–40 V input range, and 52 kHz internal oscillator frequency. It integrates a 1.0 A switch, thermal shutdown, cycle-by-cycle current limiting, and TTL-compatible ON/OFF control - designed for high-efficiency DC-DC conversion in industrial power supplies and embedded systems.
For engineers reviewing the LM2575TV-5G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.0 A output current, fixed 5 V output without external feedback resistors, TO-220-5 package with heatsink-connected ground pin, and compatibility with standard off-the-shelf inductors (e.g., 330 µH) and Schottky catch diodes (e.g., 1N5819).
Technical Context
The LM2575TV-5G implements a voltage-mode controlled buck converter architecture with an internal 52 kHz oscillator, fixed-gain error amplifier referenced to a 1.23 V bandgap, and a 1.0 A NPN switch with typical 1.0 V saturation voltage. Its feedback loop is internally configured for 5.0 V output - eliminating external resistor dividers required in adjustable versions.
Protection features include cycle-by-cycle current limiting (1.7–3.0 A peak), thermal shutdown at ~150°C junction temperature, and TTL-level ON/OFF pin logic (VIH ≈ 2.4 V, VIL ≈ 1.0 V at −40°C to +125°C). Standby quiescent current is 15–400 µA depending on temperature, enabling low-power shutdown operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - eliminates need for external feedback network and simplifies BOM. |
| Max Output Current | 1.0 A continuous - supports medium-power loads such as microcontrollers, sensors, and peripheral ICs without external current boosting. |
| Input Voltage Range | 4.75 V to 40 V - enables direct use with 5 V, 12 V, 24 V, and 36 V industrial rails and battery inputs (e.g., 2S–10S Li-ion or lead-acid). |
| Oscillator Frequency | 52 kHz ±10% (±2% from 0°C to 125°C) - balances EMI performance and inductor size; allows use of low-cost, high-current toroidal inductors. |
| Efficiency | 77% typical at Vin = 12 V, Iout = 1.0 A - significantly exceeds linear regulators under same conditions, reducing thermal design burden. |
| Thermal Resistance | RJC = 5.0°C/W (TO-220 case) - enables direct heatsink mounting via Pin 3 (GND) for reliable 1 A operation at ambient ≤ 65°C without forced air. |
| Shutdown Current | 80 µA typical standby current - supports low-power system sleep modes while maintaining fast wake-up capability. |
Pinout & Package
LM2575TV-5G uses the TO-220-5 (Case 314B) package with exposed heatsink surface electrically connected to Pin 3 (GND). The package is Pb-free, MSL Level 1, and rated for −40°C to +125°C operating junction temperature.
| 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 5 V; PCB copper area must be minimized to reduce EMI coupling into sensitive analog circuits. |
| 3 - GND | Circuit ground / heatsink connection | Common reference for all internal circuitry; metal tab is electrically tied to this pin - must be thermally and electrically connected to heatsink. |
| 4 - Feedback | Internal voltage divider tap | Internally connected to 5 V output; not accessible externally - no external resistors needed for fixed-output operation. |
| 5 - ON/OFF | TTL-compatible enable/disable control | Logic-high (>2.4 V) disables regulator (IQ ≈ 80 µA); logic-low (<1.0 V) enables operation - supports system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5 V output | Eliminates external feedback resistors, reduces component count to just 4 external parts (inductor, diode, input/output caps), and improves long-term stability vs. resistor-based adjustment. |
| Integrated protection | Combines cycle-by-cycle current limiting, thermal shutdown, and safe ON/OFF logic interface - enables robust operation in overload or short-circuit conditions without external supervision circuitry. |
| High efficiency at 1 A | 77% typical efficiency at 12 V input/5 V output/1 A load reduces power dissipation to ~1.15 W - often permits operation without heatsink below 65°C ambient. |
| Standard inductor compatibility | Optimized for widely available 330 µH inductors (e.g., Renco RL1952, Pulse PE-52627) - avoids custom magnetics and accelerates design validation. |
| Industrial temperature range | Specified from −40°C to +125°C junction temperature - suitable for automotive under-hood, industrial motor drives, and outdoor equipment applications. |
Applications
| Industrial Power Supply | Microcontroller Board Power |
|---|---|
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 step-down regulator providing isolated, efficient, and protected 5 V rail. Use Value: Delivers 1.0 A at 77% efficiency with built-in current limiting and thermal shutdown - replaces linear regulators requiring large heatsinks and improves system reliability. |
Use Scenario: On-board power for ARM Cortex-M or RISC-V development boards with mixed 5 V peripherals (USB, displays, ADCs). IC Role / Device Role / Timing Role: Fixed-output DC-DC converter supplying clean, regulated 5 V from wide-input 9–36 V wall adapters or batteries. Use Value: Simplified layout (no feedback resistors), TO-220 heatsink integration, and 52 kHz switching enable compact, cost-effective, and thermally robust board-level power. |
| Battery Charger Auxiliary Rail | Legacy Equipment Retrofit |
Use Scenario: Generating 5 V auxiliary supply for charging controller logic and status LEDs in 12–28 V Li-ion battery packs. IC Role / Device Role / Timing Role: Efficient pre-regulator stepping down high-voltage battery stack to logic-level voltage. Use Value: Wide 4.75–40 V input range accommodates full battery SOC swing; 80 µA shutdown current extends standby time between charge cycles. |
Use Scenario: Replacing obsolete 7805 linear regulators in aging industrial instrumentation with higher efficiency and thermal margin. IC Role / Device Role / Timing Role: Drop-in compatible buck converter upgrade offering 3× higher efficiency and reduced thermal stress on PCB. Use Value: Same TO-220 footprint and 5 V output; eliminates heatsink requirements in many cases due to lower power dissipation at 1 A load. |
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-5.0 | Same electrical specs but obsolete marking; TV suffix indicates tape-and-reel packaging and updated process - identical pinout, thermal performance, and functional behavior. | No difference in application; both support same external components and PCB layout. | Select LM2575TV-5G for new designs requiring current production status, RoHS compliance, and traceable sourcing. |
| MP1584EN-LF-Z | Higher switching frequency (1.5 MHz), smaller external components, but requires external feedback resistors and lacks integrated thermal foldback. | Better suited for space-constrained designs; less tolerant of sustained overload than LM2575TV-5G's robust thermal shutdown. | Choose MP1584EN-LF-Z only when board area is critical and thermal fault handling is managed externally. |
Compared with LM2575T-5.0, LM2575TV-5G offers verified current production and packaging consistency; compared with MP1584EN-LF-Z, it trades higher-frequency miniaturization for inherent thermal robustness, fixed-output simplicity, and proven field reliability in industrial environments.
Availability
LM2575TV-5G is available at Aetrix Electronics and suitable for industrial power supplies, microcontroller board power, battery charger auxiliary rails, and legacy equipment retrofits requiring stable component supply, long lifecycle support, and consistent thermal performance across temperature extremes.
Supply support for LM2575TV-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 manufacturer specializing in energy-efficient power management, analog, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The LM2575 series was designed as a rugged, easy-to-use monolithic buck regulator family targeting cost-sensitive, high-reliability industrial and automotive applications where simplicity, thermal resilience, and long-term supply stability are critical.
FAQ
What is the maximum input voltage rating for LM2575TV-5G?
The absolute maximum input voltage for LM2575TV-5G 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 designs using 36 V nominal inputs (e.g., 10S Li-ion), LM2575TV-5G provides sufficient headroom while maintaining regulation and thermal safety.
Does LM2575TV-5G require external feedback resistors to set its output voltage?
No - LM2575TV-5G is the fixed 5.0 V version; its feedback network is fully internal. Pin 4 (Feedback) is internally connected to the 5 V output node and is not intended for external connection. This eliminates resistor tolerance errors, temperature drift, and layout sensitivity associated with adjustable versions like LM2575ADJ.
Can LM2575TV-5G operate without a heatsink?
Yes, under light-to-moderate loads and ambient temperatures ≤ 65°C. At 1.0 A output with 12 V input, power dissipation is ~1.15 W. With RJA = 65°C/W (no heatsink), junction rise is ~75°C - acceptable if ambient stays below 50°C. For continuous 1 A operation above 65°C ambient, the TO-220 tab (Pin 3) must be mounted to a heatsink to maintain TJ ≤ 125°C.
What type of catch diode is recommended for LM2575TV-5G?
A Schottky diode rated ≥ 1.2× the max load current (≥1.2 A) and ≥1.25× the max input voltage (≥50 V for 40 V input) is recommended. The 1N5819 (1 A, 40 V) is validated in the datasheet's typical application circuit for ≤20 V input. For 24–40 V inputs, use 3 A/60 V Schottkys like MBR360 or SR360 to ensure adequate reverse voltage margin and low forward drop.
Is LM2575TV-5G pin-compatible with other LM2575 variants?
Yes - all LM2575 variants (3.3 V, 5 V, 12 V, 15 V, ADJ) share identical TO-220-5 (314B) and D2PAK (936A) pinouts and electrical interfaces. Pin 1 = Vin, Pin 2 = Output, Pin 3 = GND, Pin 4 = Feedback, Pin 5 = ON/OFF. However, feedback configuration differs: fixed versions tie Pin 4 internally, while adjustable versions require external R1/R2.
LM2575TV-5G 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):
- 5V
- 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-5G FAQ
1.How can I place an order for LM2575TV-5G through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575TV-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 LM2575TV-5G reliable?
The price and inventory of LM2575TV-5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575TV-5G is usually 5 days.
3.What payment methods are accepted for LM2575TV-5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575TV-5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575TV-5G?
LM2575TV-5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575TV-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 LM2575TV-5G?
For technical support, including LM2575TV-5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575TV-5G requirements.
6.How does Aetrix verify that LM2575TV-5G is sourced from the original manufacturer or authorized distributors?
All LM2575TV-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 LM2575TV-5G meets industry standards.
7.What is the process for return or replacement of LM2575TV-5G?
All LM2575TV-5G units undergo pre-shipment inspection (PSI). If there is an issue with LM2575TV-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 LM2575TV-5G part is unused and in its original packaging.
Return procedure for LM2575TV-5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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