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onsemi LM2575TV-ADJG
- Part No.:
- LM2575TV-ADJG
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2575TV-ADJG.pdf
- Description:
- IC REG BUCK ADJ 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:137
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Product details
Overview
LM2575TV-ADJG from onsemi is a monolithic step-down (buck) switching regulator IC with adjustable output voltage (1.23 V to 37 V), 1.0 A guaranteed output current, 52 kHz fixed-frequency internal oscillator, and integrated thermal shutdown and cycle-by-cycle current limiting. It operates across 4.75 V–40 V input range and is used in compact DC/DC power supplies for industrial control and embedded systems.
For engineers reviewing the LM2575TV-ADJG datasheet, pinout, applications, or equivalent options, key selection criteria include feedback reference voltage tolerance (±4% over temperature), ON/OFF logic compatibility (TTL), standby quiescent current (80 µA typ), and TO-220-5 package thermal performance (RθJC = 5.0 °C/W).
Technical Context
The LM2575TV-ADJG implements a voltage-mode controlled buck converter with an internal 1.23 V bandgap reference, error amplifier, 52 kHz oscillator, and 1.0 A NPN switch. Its feedback pin (Pin 4) directly connects to the external resistor divider, enabling precise output programming without internal scaling.
It features cycle-by-cycle current limiting (1.7–3.2 A peak), thermal shutdown activation at ~150 °C junction temperature, and TTL-compatible ON/OFF control (VIL ≤ 1.2 V, VIH ≥ 2.2 V). The device maintains ±4% output voltage regulation over line, load, and temperature (−40 °C to +125 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.0 A continuous - supports medium-power loads without external pass devices. |
| Input Voltage Range | 4.75 V to 40 V - accommodates wide-range unregulated inputs including 12 V, 24 V, and 36 V industrial rails. |
| Feedback Reference Voltage | 1.23 V ±4% - sets output via R1/R2 divider; enables 1.23–37 V adjustment with <1% resistor tolerance. |
| Oscillator Frequency | 52 kHz ±10% (±2% over 0–125 °C) - fixed frequency simplifies EMI filtering and inductor selection. |
| Standby Quiescent Current | 80 µA typical - enables low-power shutdown mode suitable for battery-backed or energy-sensitive systems. |
| Saturation Voltage | 1.0 V typical at 1.0 A - defines minimum dropout headroom and impacts efficiency at low VOUT/VIN ratios. |
| Thermal Resistance (Junction-to-Case) | 5.0 °C/W - allows direct heatsink mounting to Pin 3 (GND) for high-power operation without PCB copper area dependency. |
Pinout & Package
LM2575TV-ADJG uses the TO-220-5 (Case 314B) package with heatsink surface electrically connected to Pin 3 (GND). The exposed tab provides low-thermal-resistance path to external heatsink.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. Vin | Positive input supply | Accepts 4.75–40 V unregulated DC; requires local 100 µF low-ESR bypass capacitor to suppress switching transients. |
| 2. Output | Emitter of internal NPN switch | Drives inductor; saturation voltage ≤1.2 V limits conduction loss; PCB copper area must be minimized to reduce noise coupling. |
| 3. GND | Circuit ground / heatsink connection | Common return for all internal circuits; tab is internally bonded to this pin for thermal transfer to external heatsink. |
| 4. Feedback | Error amplifier non-inverting input | Directly senses output via external R1/R2 divider; high-impedance node requiring short trace routing to avoid noise pickup. |
| 5. ON/OFF | Logic-controlled enable/disable | TTL-compatible input; ≤1.2 V enables regulation, ≥2.2 V disables output and reduces IQ to 80 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage range | 1.23 V to 37 V with ±4% accuracy - supports single-bom flexibility across multiple system voltage rails. |
| Integrated protection | Cycle-by-cycle current limiting + thermal shutdown - eliminates need for external fault-handling circuitry in most applications. |
| Low-component-count design | Only 4 external parts required (inductor, diode, input/output capacitors) - reduces BOM cost and layout complexity. |
| High-efficiency conversion | Up to 88% efficiency (e.g., 12 VIN → 12 VOUT, 1 A) - significantly reduces heat generation vs. linear regulators. |
| TTL shutdown capability | 80 µA standby current with logic-level control - enables microcontroller-based power sequencing and sleep-mode management. |
Applications
| Industrial Power Supply | Embedded System DC/DC Converter |
|---|---|
|
Use Scenario: On-board 5 V or 12 V rail generation from 24 V factory bus in PLC I/O modules. IC Role / Device Role / Timing Role: Primary step-down regulator providing stable, regulated output with built-in current and thermal protection. Use Value: Eliminates need for heatsink in 1 A applications due to 5.0 °C/W RθJC and high efficiency, reducing board space and cost. |
Use Scenario: Local 3.3 V supply for microcontroller, sensors, and communication interfaces in edge-node gateways. IC Role / Device Role / Timing Role: Adjustable-output buck regulator enabling flexible voltage configuration without redesigning power stage. Use Value: 1.23 V reference and ±4% tolerance allow accurate output setting using standard 1% resistors, ensuring reliable MCU operation. |
| Battery Charger Pre-regulator | Positive-to-Negative Converter |
|
Use Scenario: Efficient pre-regulation stage before linear charger IC in 12 V lead-acid or LiFePO4 battery chargers. IC Role / Device Role / Timing Role: High-efficiency buck converter stepping down variable solar or adapter input to constant intermediate voltage. Use Value: 40 V max input and 1.0 A output support wide-input charging sources while minimizing power loss and thermal stress. |
Use Scenario: Generating −5 V or −12 V from positive supply in analog signal conditioning circuits. IC Role / Device Role / Timing Role: Buck-boost topology implementation using LM2575TV-ADJG in inverting configuration with external diode and capacitor polarity reversal. Use Value: Fixed 52 kHz frequency ensures predictable EMI profile and simplifies filter design for bipolar output generation. |
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-ADJ | Same electrical specs; TO-220-5 package but no "G" suffix - indicates non-Pb-free variant per onsemi marking convention. | No functional difference; identical pinout, thermal, and electrical behavior - only RoHS compliance differs. | Select LM2575TV-ADJG for Pb-free compliance and automotive-grade moisture sensitivity level (MSL 1). |
| MP1584EN-LF-Z | Higher switching frequency (1.5 MHz), smaller external components, but lower max input (28 V) and no integrated thermal shutdown latch. | Better suited for space-constrained designs; less robust under sustained overload or high ambient temperature. | Choose LM2575TV-ADJG when reliability under fault conditions, wide input range, or legacy design continuity are priorities. |
Compared with LM2575T-ADJ, LM2575TV-ADJG adds Pb-free compliance and MSL 1 rating; compared with MP1584EN-LF-Z, it trades higher-frequency size reduction for superior fault protection, wider input range, and proven thermal robustness in industrial environments.
Availability
LM2575TV-ADJG is available at Aetrix Electronics and suitable for industrial power supplies, embedded DC/DC converters, battery charger pre-regulators, and positive-to-negative converters requiring stable component supply and long-term manufacturability.
Supply support for LM2575TV-ADJG 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 sensor technologies for automotive, industrial, and cloud infrastructure markets.
The LM2575 series was designed as a cost-optimized, easy-to-use monolithic buck regulator family targeting medium-current (1 A) industrial and embedded power applications where simplicity, reliability, and thermal robustness are critical.
FAQ
What is the maximum input voltage rating for LM2575TV-ADJG?
The absolute maximum input voltage for LM2575TV-ADJG 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 reduce reliability. The device is commonly used with 12 V, 24 V, and 36 V unregulated inputs, and its 40 V limit supports transient ride-through in industrial environments. Always verify input ripple and surge margins in final design.
How do I set the output voltage of LM2575TV-ADJG?
LM2575TV-ADJG output voltage is set using two external resistors (R1 and R2) forming a voltage divider from output to feedback (Pin 4) and ground. Use the formula VOUT = 1.23 V × (1 + R2/R1), with R1 between 1.0 kΩ and 5.0 kΩ. For example, R1 = 1.2 kΩ and R2 = 3.9 kΩ yields ~5.2 V. Select 1% metal-film resistors for best temperature stability and accuracy, as confirmed in the LM2575 datasheet Figure 14 and Design Procedure section.
Does LM2575TV-ADJG require a heatsink in 1 A operation?
LM2575TV-ADJG does not require a heatsink in many 1 A applications due to its 5.0 °C/W junction-to-case thermal resistance and high efficiency (e.g., 77% at 12 VIN → 5 VOUT). However, heatsinking is recommended when ambient temperature exceeds 60 °C, input-to-output differential is large (>20 V), or continuous full-load operation is expected. Mounting the TO-220 tab (Pin 3) to a 25 cm² aluminum heatsink typically keeps junction temperature below 125 °C.
What diode should be used with LM2575TV-ADJG?
A Schottky diode rated for ≥1.2× the load current and ≥1.25× the maximum input voltage is recommended for LM2575TV-ADJG. For example, with 24 VIN and 1 A load, use a 30 V, 2 A Schottky like 1N5822 or MBR2030CT. The datasheet specifies 1N5819 for lower-current cases. Low forward voltage (<0.5 V) minimizes conduction loss and improves efficiency; fast recovery is unnecessary due to the 52 kHz fixed frequency.
Is LM2575TV-ADJG pin-compatible with other LM2575 variants?
Yes, LM2575TV-ADJG shares identical pinout, package (TO-220-5), and electrical interface with all fixed-output LM2575T-3.3, LM2575T-5.0, LM2575T-12, LM2575T-15, and LM2575T-ADJ variants. The only differences are internal feedback network (fixed versions) versus external divider (adjustable), and RoHS compliance ('V' suffix). No PCB layout change is needed when substituting among these TO-220-5 versions.
LM2575TV-ADJG 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
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 37V
- 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-ADJG FAQ
1.How can I place an order for LM2575TV-ADJG through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575TV-ADJG 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-ADJG reliable?
The price and inventory of LM2575TV-ADJG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575TV-ADJG is usually 5 days.
3.What payment methods are accepted for LM2575TV-ADJG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575TV-ADJG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575TV-ADJG?
LM2575TV-ADJG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575TV-ADJG 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-ADJG?
For technical support, including LM2575TV-ADJG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575TV-ADJG requirements.
6.How does Aetrix verify that LM2575TV-ADJG is sourced from the original manufacturer or authorized distributors?
All LM2575TV-ADJG 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-ADJG meets industry standards.
7.What is the process for return or replacement of LM2575TV-ADJG?
All LM2575TV-ADJG units undergo pre-shipment inspection (PSI). If there is an issue with LM2575TV-ADJG, 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-ADJG part is unused and in its original packaging.
Return procedure for LM2575TV-ADJG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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