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Texas Instruments TL2575HV-12IKTTR
- Part No.:
- TL2575HV-12IKTTR
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
TL2575HV-12IKTTR.pdf
- Description:
- IC REG BUCK 12V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:357
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Product details
Overview
TL2575HV-12IKTTR from Texas Instruments is a fixed-output 12-V, 1-A step-down (buck) switching voltage regulator in TO-263-5 package. It operates from 4.75 V to 60 V input, delivers ±5% output regulation over line/load/temperature, features 52-kHz fixed-frequency operation, thermal shutdown, and TTL-compatible ON/OFF control - used in industrial power supplies requiring high-input-voltage DC-DC conversion.
For engineers reviewing the TL2575HV-12IKTTR datasheet, TL2575HV-12IKTTR pinout, TL2575HV-12IKTTR application, or TL2575HV-12IKTTR equivalent, key selection criteria include its 60-V max input rating, 12-V fixed output with no external feedback resistors, cycle-by-cycle current limiting, 50-μA standby current, and compatibility with standard off-the-shelf inductors and Schottky diodes.
Technical Context
The TL2575HV-12IKTTR integrates a 1-A N-channel MOSFET switch, fixed-gain error amplifier, 1.23-V bandgap reference, and 52-kHz oscillator - all enabling self-contained buck regulation without external compensation. Its internal cycle-by-cycle current limiting and thermal shutdown provide robust fault protection during overload or overtemperature events.
It uses a voltage-mode PWM control architecture with internal frequency compensation, requiring only four external components (input/output capacitors, inductor, catch diode) for full operation. The ON/OFF pin accepts TTL/CMOS logic levels to enable or disable switching, reducing quiescent current to 50 μA in standby mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±5% over line, load, and temperature - eliminates need for external feedback divider. |
| Input Voltage Range | 4.75 V to 60 V - supports wide-range industrial, automotive, and grid infrastructure inputs. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and analog circuitry in embedded systems. |
| Switching Frequency | 52 kHz typical - enables use of low-cost, standard inductors (e.g., 330 µH) and simplifies EMI filtering. |
| Standby Current | 50 µA typical - allows low-power shutdown in battery-backed or energy-sensitive applications. |
| Efficiency | Up to 88% at 12 V out / 15 V in / 1 A load - reduces thermal load vs. linear regulators and often eliminates heatsink requirement. |
| Protection Features | Thermal shutdown + cycle-by-cycle current limiting - prevents damage during short-circuit or overtemperature conditions without external circuitry. |
Pinout & Package
TL2575HV-12IKTTR is housed in a TO-263-5 (KTT) thermally enhanced surface-mount package with exposed metal tab for PCB heat sinking. Body size is 10.16 mm × 8.93 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Unregulated DC input connection; must be decoupled with ≥100 µF electrolytic capacitor near the pin. |
| OUTPUT (Pin 2) | Regulated Output | 12-V switched output node; connects to inductor and output capacitor; carries peak switch current. |
| GND (Pin 3) | Ground Reference | Power ground return for internal circuits and switch; requires low-impedance PCB plane connection. |
| FEEDBACK (Pin 4) | Internal Feedback Node | Internally connected to 12-V output; no external resistor required - pin must be tied directly to OUTPUT for fixed-voltage operation. |
| ON/OFF (Pin 5) | Enable Control | TTL/CMOS-compatible shutdown input; <1.6 V enables regulation, >2.2 V disables switching and enters 50-µA standby mode. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12-V Output | Eliminates external feedback resistors and associated layout sensitivity - improves production consistency and reduces BOM count. |
| 60-V Absolute Max Input | Supports transient-tolerant designs in 48-V industrial buses, solar charge controllers, and railway power systems without external clamping. |
| Integrated 1-A Switch | Removes need for external MOSFET and gate driver - simplifies layout, reduces footprint, and ensures matched timing between control and power stages. |
| 52-kHz Fixed Oscillator | Enables predictable EMI profile and compatibility with low-cost, widely available inductors - avoids variable-frequency noise spread complications. |
| TTL Shutdown | Allows microcontroller or system-level power sequencing via logic-level signal - supports low-power sleep modes without auxiliary bias circuitry. |
Applications
| Industrial Motor Drives | Grid Infrastructure Monitoring |
|---|---|
Use Scenario: Powering gate drivers and isolated ADCs in 3-phase motor inverters operating from 48-V DC bus with voltage transients up to 60 V. IC Role / Device Role / Timing Role: Primary 12-V buck regulator supplying isolated IGBT/SiC driver bias and sensor interface circuitry. Use Value: 60-V input rating withstands bus transients; 1-A output supports multiple downstream rails via LDOs; 52-kHz switching enables compact magnetics. | Use Scenario: Providing stable 12-V supply to RTUs and PMUs in substation automation systems powered by 48-V telecom-style backup batteries. IC Role / Device Role / Timing Role: Main DC-DC converter converting fluctuating battery voltage (42–58 V) into regulated 12-V for microprocessor and communication modules. Use Value: ±5% regulation maintains MCU operation across full battery discharge curve; thermal shutdown protects during enclosure overheating. |
| Factory Automation PLCs | Building Management Systems |
Use Scenario: Generating 12-V rail for digital I/O modules and fieldbus transceivers in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Central point-of-load regulator feeding multiple isolated CAN and RS-485 interfaces. Use Value: ON/OFF pin enables centralized power cycling during firmware updates; 1-A capacity supports up to eight isolated transceivers. | Use Scenario: Powering HVAC controllers and smart sensor nodes in commercial buildings where input derives from 24–60 V PoE++ or centralized DC distribution. IC Role / Device Role / Timing Role: Primary buck converter delivering 12-V to MCU, wireless SoC, and analog front-end. Use Value: 50-μA standby current extends battery backup runtime; fixed 12-V output avoids calibration drift from resistor tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575HV-12 | Same 12-V fixed output, 1-A rating, and 60-V max input; differs in internal compensation network and slightly higher quiescent current (8 mA vs. 5–10 mA). | Compatible in most TL2575HV-12IKTTR layouts but may require minor loop stability verification due to different phase margin. | Select when legacy LM2575HV design reuse is prioritized over TI's newer thermal performance and tighter load regulation. |
| MP1584EN-LF-Z | Adjustable 0.8–28 V output, 3-A capability, 45 V max input, and 1.5-MHz switching - no fixed 12-V variant; requires external feedback resistors. | Suitable for space-constrained designs needing higher current or smaller inductors, but adds BOM complexity and layout sensitivity. | Choose for new designs requiring >1 A or higher switching frequency; avoid if fixed 12-V simplicity and proven reliability are critical. |
Compared with LM2575HV-12 and MP1584EN-LF-Z, TL2575HV-12IKTTR offers superior load regulation (±5% vs. ±7%), lower standby current (50 µA vs. 55 µA), and integrated thermal protection with no external components - making it optimal for industrial applications demanding long-term reliability and minimal design iteration.
Availability
TL2575HV-12IKTTR is available at Aetrix Electronics and suitable for industrial motor drives, grid infrastructure monitoring, and factory automation PLCs requiring stable component supply with extended temperature support and high-input-voltage resilience.
Supply support for TL2575HV-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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management ICs for industrial, automotive, and communications markets.
The TL2575HV product line was designed specifically for rugged, high-input-voltage DC-DC conversion in industrial power supplies - emphasizing simplicity, reliability, and minimal external component count over high-frequency optimization.
FAQ
What is the maximum input voltage rating for TL2575HV-12IKTTR?
The TL2575HV-12IKTTR has an absolute maximum input voltage rating of 60 V, with recommended operating range from 4.75 V to 60 V. This high-voltage capability makes it suitable for 48-V industrial systems, solar charge controllers, and railway applications where input transients exceed standard 40-V buck regulator limits. Operation above 60 V risks permanent device damage per the datasheet's Absolute Maximum Ratings table.
Does TL2575HV-12IKTTR require external feedback resistors to set its output voltage?
No, TL2575HV-12IKTTR does not require external feedback resistors. As a fixed-output variant, its internal feedback network is trimmed to deliver 12 V ±5%, and the FEEDBACK pin (Pin 4) must be connected directly to the OUTPUT pin. Adding external resistors would disrupt regulation and is neither supported nor recommended - unlike the adjustable TL2575HV-ADJ version.
How does the ON/OFF pin function on TL2575HV-12IKTTR?
The ON/OFF pin (Pin 5) provides TTL-compatible enable/disable control: applying <1.6 V (typically grounded) enables regulation, while applying >2.2 V (e.g., 3.3 V or 5 V logic high) places TL2575HV-12IKTTR into standby mode with 50-μA typical quiescent current. The pin must not be left floating; a pull-up to VIN is acceptable per the datasheet. This feature enables precise system-level power sequencing and low-power sleep states.
What thermal performance can be expected from TL2575HV-12IKTTR in TO-263-5 package?
In the TO-263-5 (KTT) package, TL2575HV-12IKTTR 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 area (≥4 cm² 2-oz copper under exposed tab), it sustains 1-A continuous output at ambient temperatures up to 85°C without forced airflow. Thermal shutdown activates at 150°C junction temperature, protecting against sustained overload or inadequate heatsinking.
Which external components are mandatory for basic operation of TL2575HV-12IKTTR?
Four mandatory external components are required: (1) input capacitor (≥100 µF aluminum electrolytic), (2) output capacitor (≥330 µF aluminum electrolytic), (3) power inductor (330 µH, rated ≥1.5 A saturation current), and (4) Schottky catch diode (e.g., 1N5819 or equivalent). These form the core buck converter topology; omitting any compromises regulation, efficiency, or reliability - as confirmed in Figure 7-1 and Section 9.1 of the TI datasheet SLVS638D.
TL2575HV-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):
- 60V
- 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)
TL2575HV-12IKTTR FAQ
1.How can I place an order for TL2575HV-12IKTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575HV-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 TL2575HV-12IKTTR reliable?
The price and inventory of TL2575HV-12IKTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575HV-12IKTTR is usually 5 days.
3.What payment methods are accepted for TL2575HV-12IKTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575HV-12IKTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575HV-12IKTTR?
TL2575HV-12IKTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575HV-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 TL2575HV-12IKTTR?
For technical support, including TL2575HV-12IKTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575HV-12IKTTR requirements.
6.How does Aetrix verify that TL2575HV-12IKTTR is sourced from the original manufacturer or authorized distributors?
All TL2575HV-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 TL2575HV-12IKTTR meets industry standards.
7.What is the process for return or replacement of TL2575HV-12IKTTR?
All TL2575HV-12IKTTR units undergo pre-shipment inspection (PSI). If there is an issue with TL2575HV-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 TL2575HV-12IKTTR part is unused and in its original packaging.
Return procedure for TL2575HV-12IKTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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