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Texas Instruments TL2575-12IKTTR
- Part No.:
- TL2575-12IKTTR
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
TL2575-12IKTTR.pdf
- Description:
- IC REG BUCK 12V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:290
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Product details
Overview
TL2575-12IKTTR from Texas Instruments is a fixed-output 12-V, 1-A step-down (buck) switching voltage regulator in TO-263-5 (KTT) package. It operates from 15 V to 40 V input, delivers ±4.2% output regulation over line/load/temperature, and integrates a 52-kHz oscillator, cycle-by-cycle current limiting, and thermal shutdown. It serves as the primary DC-DC conversion stage in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the TL2575-12IKTTR datasheet, TL2575-12IKTTR pinout, TL2575-12IKTTR application, or TL2575-12IKTTR equivalent, key selection criteria include its 12-V fixed output with ±4.2% tolerance, 1-A continuous load capability, 88% typical efficiency at 15-VIN/1-A, TTL-compatible ON/OFF control with 50-μA standby current, and TO-263 thermal performance (RθJA = 26.5°C/W).
Technical Context
The TL2575-12IKTTR implements a monolithic buck converter architecture with an integrated 1-A N-channel MOSFET switch, fixed-frequency 52-kHz PWM controller, and internal 1.23-V bandgap reference. Regulation is achieved via feedback of the output voltage to the error amplifier through a direct connection from OUTPUT to FEEDBACK pin - no external resistors required for the fixed 12-V version.
It features cycle-by-cycle current limiting, thermal shutdown triggered at 150°C junction temperature, and a dedicated ON/OFF pin enabling TTL-level shutdown with 50-μA standby quiescent current. The device requires only four external components: input capacitor, output capacitor, catch diode, and power inductor - all standard off-the-shelf parts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4.2% (11.4–12.6 V) across –40°C to 125°C, 15–40 VIN, 0.2–1 A load - ensures stable rail for microcontrollers and analog circuitry without trimming. |
| Output Current | 1 A continuous - supports single-rail power delivery for mid-power embedded systems without external current boosting. |
| Input Voltage Range | 15 V to 40 V - compatible with 24-V industrial buses and wide-range unregulated supplies, excluding HV variant. |
| Switching Frequency | 52 kHz (typical), 42–63 kHz (full temp range) - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity vs. MHz-class regulators. |
| Efficiency | 88% typical at 15 VIN, 1 A load - minimizes thermal dissipation; eliminates heatsink in most PCB layouts with adequate copper area. |
| Standby Current | 50 μA typical at OFF state - enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Junction Temperature | –40°C to 125°C operating range - qualified for industrial and factory automation environments with extended thermal cycling. |
Pinout & Package
TL2575-12IKTTR is housed in a thermally enhanced TO-263-5 (KTT) surface-mount package (10.16 mm × 8.93 mm body, exposed thermal pad). The 5-pin configuration supports high-current routing and efficient PCB heat spreading.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated DC input supply | Accepts 15–40 V; requires ≥100 µF low-ESR aluminum electrolytic capacitor placed adjacent to pin for stability and ripple suppression. |
| OUTPUT (Pin 2) | Regulated 12-V output node | Delivers up to 1 A; connects directly to FEEDBACK pin for fixed-voltage operation and to output capacitor (≥330 µF) and inductor. |
| GND (Pin 3) | Power ground reference | Common return for VIN, OUTPUT, and ON/OFF; must be tied to large copper pour under exposed thermal pad for thermal management. |
| FEEDBACK (Pin 4) | Voltage sense input | Internally connected to 12-V output for fixed version; open-circuit or resistor-connected only in adjustable variants - not used externally here. |
| ON/OFF (Pin 5) | TTL-compatible enable/disable control | Pull to GND (≤1 V) for normal operation; apply ≥2.2 V to enter 50-μA standby mode - supports system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1-A power switch | Eliminates need for external MOSFET and gate driver - reduces BOM count and layout area while maintaining robust short-circuit protection. |
| Fixed 12-V output with no external resistors | Removes tuning uncertainty and resistor tolerance errors; simplifies design validation and production calibration. |
| 52-kHz fixed-frequency operation | Enables predictable EMI spectrum and compatibility with low-cost, high-current inductors (e.g., 330 µH) without frequency jitter concerns. |
| Cycle-by-cycle current limiting | Prevents destructive overcurrent during startup, overload, or output short - maintains safe operation without latch-off or manual reset. |
| Thermal shutdown with automatic recovery | Halts switching at 150°C junction temperature and resumes when cooled below hysteresis threshold - protects against sustained overloads. |
Applications
| Industrial Motor Drives | Factory Automation Controllers |
|---|---|
|
Use Scenario: Powering logic, sensors, and gate drivers in 24-V DC-fed motor control modules. IC Role / Device Role / Timing Role: Primary 12-V buck regulator supplying MCU, isolated I/O, and optocoupler bias rails. Use Value: Delivers 1 A at 88% efficiency with no heatsink needed on 2-oz copper; withstands 40-V transients common in relay-coil switching environments. |
Use Scenario: Generating stable 12-V rail for PLC backplane modules and distributed I/O terminals. IC Role / Device Role / Timing Role: Central DC-DC converter converting 24-V field bus to regulated 12-V for FPGA configuration, ADC references, and communication PHYs. Use Value: ±4.2% output regulation ensures consistent timing margins for SPI/I²C peripherals across –40°C to 85°C ambient. |
| Grid Infrastructure Monitoring | Building Management Systems |
|
Use Scenario: Powering RTUs and smart meter auxiliary circuits in outdoor substations with wide ambient temperature swings. IC Role / Device Role / Timing Role: Isolated 12-V supply feeding isolated RS-485 transceivers and precision analog front-ends. Use Value: Operates continuously from –40°C to 125°C junction; 50-μA standby enables battery-backed sleep mode during grid outage detection. |
Use Scenario: Providing 12-V power to HVAC controllers, occupancy sensors, and digital thermostats in commercial buildings. IC Role / Device Role / Timing Role: Main DC-DC stage converting 24-V PoE-derived or transformer-rectified input to clean 12-V system rail. Use Value: Requires only four passive components - accelerates certification testing for UL 60730 safety compliance in Class 2 power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575HVS-12 | Higher 60-V max input (HV variant); identical 12-V fixed output, 1-A rating, and TO-263-5 package. | Suitable for 48-V telecom or solar-input systems where input may exceed 40 V transiently. | Select LM2575HVS-12 only if input voltage exceeds 40 V; otherwise TL2575-12IKTTR offers lower cost and same performance at ≤40 V. |
| TPS54202DDCR | 2-A synchronous buck; 4.5–28-V input; 500-kHz switching; requires external compensation; smaller SOT-23-6 package. | Better suited for space-constrained, higher-efficiency designs needing >1 A or <28-V input. | Choose TPS54202DDCR for compact, high-density boards with 12-V output and >1-A demand; TL2575-12IKTTR remains optimal for ruggedized 24-V industrial inputs with minimal component count. |
Compared with LM2575HVS-12 and TPS54202DDCR, TL2575-12IKTTR provides the best balance of rugged 40-V input tolerance, proven thermal reliability in TO-263, and lowest external part count for fixed 12-V industrial power - without requiring compensation design or synchronous layout constraints.
Availability
TL2575-12IKTTR is available at Aetrix Electronics and suitable for industrial motor drives, factory automation controllers, and grid infrastructure monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TL2575-12IKTTR 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 specializing in analog and embedded processing technologies, with decades of expertise in power management ICs for industrial, automotive, and enterprise applications.
The TL2575 product line delivers highly integrated, easy-to-use buck regulators targeting cost-sensitive, high-reliability industrial power supplies - designed to replace linear regulators while minimizing design effort and external component count.
FAQ
What is the maximum input voltage rating for TL2575-12IKTTR?
The absolute maximum input voltage for TL2575-12IKTTR is 42 V, with recommended operating range from 15 V to 40 V. Exceeding 40 V risks violating recommended conditions and may trigger thermal shutdown or reduce long-term reliability. For 48-V or 60-V input systems, TI's TL2575HV-12IKTTR variant is specified up to 60 V input.
Does TL2575-12IKTTR require external feedback resistors?
No. TL2575-12IKTTR is a fixed-output variant: the FEEDBACK pin is internally connected to the 12-V output stage, so no external resistors are needed. External resistors are only required for the adjustable TL2575-ADJ version. Connecting resistors to TL2575-12IKTTR's FEEDBACK pin would disrupt regulation and is not supported.
What is the thermal resistance (RθJA) of TL2575-12IKTTR in its TO-263 package?
The junction-to-ambient thermal resistance (RθJA) for TL2575-12IKTTR in the KTT (TO-263-5) package is 26.5°C/W under standard JEDEC 2-layer board conditions. This value assumes proper PCB layout with ≥4 cm² of 2-oz copper connected to the exposed thermal pad - critical to achieving full 1-A output without derating.
Can TL2575-12IKTTR be used in inverting buck-boost configurations?
Yes - the TL2575-12IKTTR datasheet explicitly lists "inverting buck-boost power supplies" among its applications. When configured as an inverter, it generates a negative output (e.g., –12 V) from a positive input. However, the fixed 12-V feedback network is optimized for positive buck operation; inverting use requires careful attention to diode orientation, grounding, and loop stability per Figure 9-2 in the datasheet.
What is the typical efficiency of TL2575-12IKTTR at full 1-A load?
TL2575-12IKTTR achieves 88% typical efficiency at 15-V input and 1-A output load, as measured per the datasheet's electrical characteristics table. Efficiency drops to ~77% at 40-V input due to higher switching losses and duty-cycle limitations, and rises slightly at lighter loads. Real-world efficiency depends on external component selection (e.g., Schottky diode VF, inductor DCR).
TL2575-12IKTTR 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- 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)
TL2575-12IKTTR FAQ
1.How can I place an order for TL2575-12IKTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575-12IKTTR 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 TL2575-12IKTTR reliable?
The price and inventory of TL2575-12IKTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575-12IKTTR is usually 5 days.
3.What payment methods are accepted for TL2575-12IKTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575-12IKTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575-12IKTTR?
TL2575-12IKTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575-12IKTTR 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 TL2575-12IKTTR?
For technical support, including TL2575-12IKTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575-12IKTTR requirements.
6.How does Aetrix verify that TL2575-12IKTTR is sourced from the original manufacturer or authorized distributors?
All TL2575-12IKTTR 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 TL2575-12IKTTR meets industry standards.
7.What is the process for return or replacement of TL2575-12IKTTR?
All TL2575-12IKTTR units undergo pre-shipment inspection (PSI). If there is an issue with TL2575-12IKTTR, 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 TL2575-12IKTTR part is unused and in its original packaging.
Return procedure for TL2575-12IKTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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