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Texas Instruments TL2575-12IKV
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- Part No.:
- TL2575-12IKV
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
TL2575-12IKV.pdf
- Description:
- IC REG BUCK 12V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,332
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Product details
Overview
TL2575-12IKV from Texas Instruments is a fixed-output 12-V, 1-A step-down (buck) switching voltage regulator in TO-220 staggered-leads package. It delivers ±5% output regulation over line, load, and temperature, operates from 15 V to 40 V input, features integrated 1-A switch, 52-kHz fixed-frequency oscillator, and thermal/current-limit protection - used in industrial power supplies requiring compact, efficient DC-DC conversion.
For engineers reviewing the TL2575-12IKV datasheet, TL2575-12IKV pinout, TL2575-12IKV application, or TL2575-12IKV equivalent, key selection considerations include its 12-V fixed output, 40-V max input, ON/OFF shutdown capability, thermal shutdown behavior, and compatibility with standard 330-µH inductors and Schottky catch diodes in minimal-component buck designs.
Technical Context
The TL2575-12IKV implements a current-mode controlled buck topology with internal 1-A N-channel MOSFET switch, fixed 52-kHz oscillator, and cycle-by-cycle current limiting. Its error amplifier compares feedback voltage against a 1.23-V internal bandgap reference to regulate output via PWM duty cycle adjustment.
It integrates thermal shutdown, internal frequency compensation, and TTL-compatible ON/OFF control pin enabling <50-μA standby current. The device requires only four external components for operation: input capacitor, output capacitor, catch diode, and power inductor - no external compensation network needed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±5% over full line/load/temperature range - ensures stable rail for microcontrollers and sensors without external resistive divider. |
| Max Input Voltage | 40 V - supports wide-input industrial and automotive battery-derived supplies (e.g., 24-V nominal systems with transients). |
| Output Current | 1 A continuous - sufficient to power multiple ICs or small motors without external pass devices. |
| Oscillator Frequency | 52 kHz typical - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity vs. MHz-range regulators. |
| Standby Current | 50 μA typical at shutdown - minimizes system-level quiescent drain in battery-backed or always-on applications. |
| Efficiency | 88% typical at 15-VIN/1-A - reduces thermal load vs. linear regulators, often eliminating heatsink requirements. |
| Protection | Thermal shutdown + cycle-by-cycle current limiting - prevents damage during overload or short-circuit without latch-off. |
Pinout & Package
TL2575-12IKV uses the KV (TO-220 staggered leads) package: 5-pin, 10.16 mm × 8.82 mm body, with exposed tab electrically connected to GND for thermal conduction and mechanical mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated DC input | Accepts 15–40 V supply; requires ≥100 µF input capacitor placed adjacent to pin for stability and ripple suppression. |
| OUTPUT (Pin 2) | Regulated 12-V output | Delivers up to 1 A; connects to output inductor and catch diode anode; traces must handle peak switch current. |
| GND (Pin 3) | Power ground | Common return for input/output paths and thermal pad; must be low-impedance plane for noise control and thermal dissipation. |
| FEEDBACK (Pin 4) | Output voltage sense | Internally tied to 12-V output; no external resistor required - simplifies layout and eliminates divider drift errors. |
| ON/OFF (Pin 5) | Shutdown control | TTL-compatible input: <1.2 V = active, >2.2 V = standby; pull-down recommended if unused to prevent floating. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12-V output | Eliminates external feedback resistors - improves accuracy, reduces BOM count, and avoids resistor tolerance/temperature drift effects. |
| Integrated 1-A switch | Removes need for external MOSFET and gate driver - cuts board area, simplifies thermal design, and ensures matched timing. |
| 52-kHz fixed-frequency operation | Enables predictable EMI spectrum and consistent inductor sizing - avoids variable-frequency jitter and simplifies filter design. |
| TTL shutdown (50-μA standby) | Allows system-level power sequencing and low-power sleep modes - critical for energy-sensitive industrial controllers. |
| Thermal + current-limit protection | Self-protecting under fault conditions without external circuitry - enhances reliability in unattended equipment like remote sensors. |
Applications
| Industrial Motor Drives | Building Automation Controllers |
|---|---|
Use Scenario: Powering logic and gate drivers in 24-V DC motor control modules for HVAC actuators and valve positioners. IC Role / Device Role / Timing Role: Primary 12-V buck regulator supplying MCU, op-amps, and half-bridge drivers from noisy 24-V bus. Use Value: 88% efficiency minimizes heat rise in sealed enclosures; thermal shutdown prevents latch-up during stall conditions. | Use Scenario: Providing regulated 12-V rail for wireless sensor nodes and programmable logic controllers in smart lighting and access control panels. IC Role / Device Role / Timing Role: System power management IC delivering stable 12-V output with ON/OFF control synchronized to occupancy detection signals. Use Value: 50-μA standby current extends battery life in backup-powered nodes; ±5% regulation maintains ADC reference accuracy across temperature. |
| Grid Infrastructure Monitoring | Factory Automation I/O Modules |
Use Scenario: Converting 48-V telecom-style DC input to 12-V for data acquisition front-ends in substation condition monitoring units. IC Role / Device Role / Timing Role: Isolated secondary-side regulator powering analog signal chains and isolated UART transceivers. Use Value: 40-V max input accommodates 48-V bus transients; fixed 12-V output ensures consistent bias for precision op-amps and ADCs. | Use Scenario: Supplying 12-V logic power to digital input/output expansion modules interfacing with PLC backplanes. IC Role / Device Role / Timing Role: Point-of-load regulator converting 24-V field bus to clean 12-V for FPGA configuration, level shifters, and optocoupler LEDs. Use Value: Integrated current limiting protects against shorted I/O lines; TO-220 package allows direct heatsinking to chassis for high ambient temps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575-12 | Same pinout, identical 12-V fixed output, but lower 40-V max input (vs. TL2575-12IKV's 40-V), same 1-A rating and 52-kHz frequency. | No HV variant; not rated for 40-V sustained input - unsuitable where input may reach 40 V continuously. | Select LM2575-12 only if input stays ≤36 V and legacy TI second-source qualification is required. |
| MP1584EN-LF-Z | Adjustable output (1.23–28 V), 3-A rating, 1.5-MHz switching, SOIC-8 package - higher efficiency at light loads but requires external feedback resistors and compensation. | Lacks fixed 12-V option and thermal shutdown flag; smaller package limits power dissipation at full 1-A load. | Choose MP1584EN-LF-Z when higher density, adjustable output, or faster transient response is prioritized over simplicity and ruggedness. |
Compared with LM2575-12, TL2575-12IKV offers identical functionality with documented 40-V absolute maximum input rating; versus MP1584EN-LF-Z, it trades higher integration and thermal robustness for fixed-output simplicity and TO-220 thermal handling - making TL2575-12IKV optimal for cost-sensitive, thermally demanding industrial buck applications.
Availability
TL2575-12IKV is available at Aetrix Electronics and suitable for industrial motor drives, building automation controllers, grid infrastructure monitoring, and factory automation I/O modules requiring stable component supply, long-term manufacturability, and proven thermal resilience.
Supply support for TL2575-12IKV 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, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion ICs.
The TL2575 product line was designed for cost-effective, thermally robust DC-DC conversion in industrial, automation, and infrastructure applications - emphasizing simplicity, ruggedness, and minimal external component count.
FAQ
What is the maximum input voltage rating for TL2575-12IKV?
The TL2575-12IKV has an absolute maximum input voltage rating of 42 V and a recommended operating maximum of 40 V. This allows reliable operation from 24-V or 36-V industrial bus systems with transient headroom. Exceeding 40 V continuously risks exceeding thermal limits or triggering internal protection - always verify worst-case input conditions in the final design before selecting TL2575-12IKV.
Does TL2575-12IKV require external feedback resistors?
No, TL2575-12IKV does not require external feedback resistors. As a fixed 12-V output variant, the FEEDBACK pin is internally connected to the OUTPUT pin. This eliminates resistor tolerance errors, temperature drift, and layout sensitivity - directly contributing to the ±5% output regulation specification across line, load, and temperature. TL2575-12IKV achieves this simplicity without sacrificing accuracy or stability.
How does the ON/OFF pin function on TL2575-12IKV?
The ON/OFF pin on TL2575-12IKV is a TTL-compatible shutdown control: grounding or applying <1.2 V enables normal operation; applying >2.2 V places TL2575-12IKV into standby mode with ~50-μA quiescent current. The pin must not be left floating - a 10-kΩ pull-down resistor is recommended for default-on behavior. This feature enables precise system-level power sequencing and low-power sleep states in battery or energy-harvesting applications using TL2575-12IKV.
What thermal performance can be expected from TL2575-12IKV in TO-220 package?
In the KV (TO-220 staggered leads) package, TL2575-12IKV has a junction-to-ambient thermal resistance (RθJA) of 26.5°C/W. At 1-A load and 40-V input, typical power dissipation is ~2.8 W - resulting in ~74°C junction rise above ambient. With proper PCB copper area (≥2 in² 2-oz copper connected to GND tab) and optional heatsink, TL2575-12IKV reliably operates within its –40°C to 125°C virtual junction range. Thermal shutdown activates at 150°C to prevent damage.
Which external components are mandatory for TL2575-12IKV operation?
Four mandatory external components are required for TL2575-12IKV: (1) ≥100-µF aluminum electrolytic input capacitor (CIN) near VIN pin, (2) ≥330-µF output capacitor (COUT) near OUTPUT pin, (3) Schottky catch diode (e.g., 1N5819) rated ≥3-A PIV, and (4) 330-µH power inductor rated ≥1.5-A saturation current. No external compensation or feedback resistors are needed - this minimal BOM is a core design advantage of TL2575-12IKV.
TL2575-12IKV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Bulk
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-5
TL2575-12IKV FAQ
1.How can I place an order for TL2575-12IKV through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575-12IKV 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 TL2575-12IKV reliable?
The price and inventory of TL2575-12IKV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575-12IKV is usually 5 days.
3.What payment methods are accepted for TL2575-12IKV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575-12IKV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575-12IKV?
TL2575-12IKV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575-12IKV 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 TL2575-12IKV?
For technical support, including TL2575-12IKV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575-12IKV requirements.
6.How does Aetrix verify that TL2575-12IKV is sourced from the original manufacturer or authorized distributors?
All TL2575-12IKV 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 TL2575-12IKV meets industry standards.
7.What is the process for return or replacement of TL2575-12IKV?
All TL2575-12IKV units undergo pre-shipment inspection (PSI). If there is an issue with TL2575-12IKV, 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 TL2575-12IKV part is unused and in its original packaging.
Return procedure for TL2575-12IKV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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