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Texas Instruments TL2575-ADJIKTTR
- Part No.:
- TL2575-ADJIKTTR
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
TL2575-ADJIKTTR.pdf
- Description:
- IC REG BUCK ADJ 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:2,364
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Product details
Overview
TL2575-ADJIKTTR from Texas Instruments is an adjustable 1-A step-down (buck) switching voltage regulator with internal 1-A MOSFET switch, 1.23-V reference, and fixed 52-kHz oscillator. It operates from 4.75 V to 40 V input, delivers output from 1.23 V to 37 V, and achieves up to 88% efficiency in buck configurations for industrial power rails and motor drive bias supplies.
For engineers reviewing the TL2575-ADJIKTTR datasheet, TL2575-ADJIKTTR pinout, TL2575-ADJIKTTR application, or TL2575-ADJIKTTR equivalent, this page provides verified package mapping (TO-263-5), confirmed feedback regulation accuracy (±4%), validated thermal shutdown behavior, and real-world design values for ON/OFF control, saturation voltage, and standby current.
Technical Context
The TL2575-ADJIKTTR integrates a fixed-frequency PWM controller, cycle-by-cycle current limiting, internal 1.23-V band-gap reference, and thermal shutdown circuitry. Its error amplifier compares feedback voltage against the 1.23-V reference to adjust duty cycle via a comparator-driven switch driver.
It uses external resistive feedback (R1/R2) to set output voltage per VOUT = 1.23 V × (1 + R2/R1), supports TTL-compatible ON/OFF shutdown with 50-μA standby current, and maintains ±4% regulation across –40°C to +125°C junction temperature and full line/load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A continuous - supports single-rail industrial loads without external pass devices |
| Input Voltage Range | 4.75 V to 40 V - compatible with 5 V, 12 V, 24 V, and 36 V DC bus systems |
| Adjustable Output Range | 1.23 V to 37 V - enables custom bias voltages for analog circuits, sensors, and logic |
| Oscillator Frequency | 52 kHz (typical) - fixed frequency simplifies EMI filtering and inductor selection |
| Feedback Reference | 1.23 V ±1.5% - sets precision output scaling with external resistor divider |
| Standby Quiescent Current | 50 μA (typical) - enables low-power shutdown in battery-backed or energy-sensitive systems |
| Saturation Voltage | 1.2 V (max at 1 A) - defines minimum dropout and conduction loss under full load |
| Regulation Accuracy | ±4% over line, load, and temperature - ensures stable output without post-regulation |
Pinout & Package
TL2575-ADJIKTTR is packaged in TO-263-5 (KTT) with exposed thermal pad, 10.16 mm × 8.93 mm body size, and surface-mount footprint optimized for high-current thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated DC input supply | Accepts 4.75–40 V; requires local 100-μF input capacitor for stability |
| OUTPUT (Pin 2) | Switched output node | Drives external inductor and catch diode; connects to output filter capacitor |
| GND (Pin 3) | Power ground reference | Common return for input/output capacitors, feedback network, and thermal pad |
| FEEDBACK (Pin 4) | Resistive divider input | Connects between R1 (to GND) and R2 (to OUTPUT); sets VOUT = 1.23 V × (1 + R2/R1) |
| ON/OFF (Pin 5) | TTL-compatible enable/disable control | Pull ≤1.0 V to enable; apply ≥2.2 V to enter 50-μA standby mode |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1-A power switch | Eliminates need for external MOSFET and gate driver in 1-A buck designs |
| Fixed 52-kHz oscillator | Enables predictable EMI profile and consistent inductor sizing across production units |
| Cycle-by-cycle current limiting | Prevents switch damage during short-circuit or overload without external sensing |
| Thermal shutdown protection | Halts operation above 150°C junction temperature; auto-resumes after cooldown |
| Internal frequency compensation | Reduces external component count-only four components required for basic operation |
Applications
| Industrial Motor Drive Bias | Factory Automation Power Rail |
|---|---|
Use Scenario: Providing isolated 5-V or 12-V bias for gate drivers and logic in 24-V DC-powered servo controllers. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated rail directly from main DC bus. Use Value: Replaces linear regulators to eliminate heatsinks and reduce board area by >60% while maintaining ±4% output stability. |
Use Scenario: Generating 3.3-V or 5-V supply for PLC I/O modules operating from 24-V field wiring. IC Role / Device Role / Timing Role: Fixed or adjustable step-down converter powering microcontrollers and communication interfaces. Use Value: Delivers 1-A output with 88% efficiency at 24-V input, reducing thermal load in enclosed control cabinets. |
| Grid Infrastructure Monitoring | Building Automation Sensor Hub |
Use Scenario: Powering RTU telemetry circuits in outdoor substations where input varies from 12–40 V due to battery/solar hybrid sources. IC Role / Device Role / Timing Role: Wide-input buck regulator enabling single-design compatibility across multiple power sources. Use Value: Maintains regulation across full 4.75–40 V range with only passive external components-no firmware or configuration needed. |
Use Scenario: Supplying 3.3-V rail to multi-sensor nodes (temperature, humidity, CO₂) in HVAC ducts with 24-V building power. IC Role / Device Role / Timing Role: Adjustable-output regulator configured for precise 3.3-V or 5-V outputs per sensor requirements. Use Value: Achieves ±4% output accuracy over –40°C to +85°C ambient, ensuring ADC reference stability without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575-ADJ | Same pinout and functional architecture; lower max input (40 V vs. TL2575-ADJ's 40 V), identical 1.23-V reference and 52-kHz oscillator | No HV variant; lacks TL2575HV-ADJ's 60-V input capability - not suitable for 48-V telecom or grid-edge designs | Select LM2575-ADJ only when cost sensitivity outweighs need for TI's extended thermal spec (–40°C to 125°C virtual junction) |
| MP1584EN-LF-Z | Higher switching frequency (1.5 MHz), smaller external components, but no integrated thermal shutdown reset hysteresis and 0.8-V reference | Requires different feedback divider and layout; unsuitable for legacy drop-in replacement due to different pinout and control loop behavior | Choose MP1584EN-LF-Z only for new compact designs prioritizing size over proven industrial reliability and thermal fault recovery |
Compared with LM2575-ADJ and MP1584EN-LF-Z, TL2575-ADJIKTTR offers guaranteed 125°C virtual junction operation, integrated thermal shutdown with automatic recovery, and documented 52-kHz EMI profile-critical for EN 55022 Class B compliance in industrial enclosures.
Availability
TL2575-ADJIKTTR is available at Aetrix Electronics and suitable for industrial motor drives, factory automation power rails, and grid infrastructure monitoring systems requiring stable component supply, long-lifecycle assurance, and traceable sourcing.
Supply support for TL2575-ADJIKTTR 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
Texas Instruments is a global semiconductor leader focused on analog and embedded processing technologies, with decades of expertise in power management ICs for industrial, automotive, and enterprise applications.
TL2575-ADJIKTTR belongs to TI's legacy buck regulator product line designed specifically for robust, low-component-count DC-DC conversion in harsh environments-emphasizing thermal resilience, wide input range, and integrated protection.
FAQ
What is the maximum input voltage rating for TL2575-ADJIKTTR?
The absolute maximum input voltage for TL2575-ADJIKTTR is 42 V, with recommended operating range from 4.75 V to 40 V. Exceeding 42 V risks permanent damage. This distinguishes it from the TL2575HV-ADJ variant, which supports up to 60 V input. Always include input transient suppression if operating near the 40-V upper limit in TL2575-ADJIKTTR designs.
How do I configure TL2575-ADJIKTTR for a 12-V output?
To configure TL2575-ADJIKTTR for 12-V output, connect a resistor divider between OUTPUT and GND, with FEEDBACK tied to the node between them. Use R1 = 1 kΩ to GND and R2 = 8.84 kΩ to OUTPUT, per TI's published design table. The output satisfies VOUT = 1.23 V × (1 + R2/R1). Verify with load testing across temperature and line variation.
Does TL2575-ADJIKTTR require an external compensation network?
No, TL2575-ADJIKTTR includes internal frequency compensation and requires no external compensation components. Its fixed 52-kHz oscillator and integrated error amplifier are pre-tuned for stability with standard 330-μH inductors and aluminum electrolytic output capacitors. Only the feedback resistors, input/output capacitors, inductor, and catch diode are mandatory external parts.
What is the thermal performance of TL2575-ADJIKTTR in TO-263-5 package?
In the TO-263-5 (KTT) package, TL2575-ADJIKTTR has a junction-to-ambient thermal resistance (RθJA) of 26.5°C/W and junction-to-case (bottom) resistance of 0.38°C/W. With proper PCB copper pour under the thermal pad, it sustains 1-A continuous output at 125°C virtual junction temperature. Derate linearly above 25°C ambient per the thermal curves in the datasheet.
Can TL2575-ADJIKTTR be used in inverting buck-boost topology?
Yes, TL2575-ADJIKTTR supports inverting buck-boost configuration per TI's application notes. In this mode, OUTPUT becomes the switching node, GND serves as the negative output rail, and the feedback network references the inverted output. Input voltage range remains 4.75–40 V, but output polarity is inverted and absolute magnitude is limited by component stress and layout parasitics.
TL2575-ADJIKTTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
TL2575-ADJIKTTR FAQ
1.How can I place an order for TL2575-ADJIKTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575-ADJIKTTR 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 TL2575-ADJIKTTR reliable?
The price and inventory of TL2575-ADJIKTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575-ADJIKTTR is usually 5 days.
3.What payment methods are accepted for TL2575-ADJIKTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575-ADJIKTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575-ADJIKTTR?
TL2575-ADJIKTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575-ADJIKTTR 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 TL2575-ADJIKTTR?
For technical support, including TL2575-ADJIKTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575-ADJIKTTR requirements.
6.How does Aetrix verify that TL2575-ADJIKTTR is sourced from the original manufacturer or authorized distributors?
All TL2575-ADJIKTTR 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 TL2575-ADJIKTTR meets industry standards.
7.What is the process for return or replacement of TL2575-ADJIKTTR?
All TL2575-ADJIKTTR units undergo pre-shipment inspection (PSI). If there is an issue with TL2575-ADJIKTTR, 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 TL2575-ADJIKTTR part is unused and in its original packaging.
Return procedure for TL2575-ADJIKTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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