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Texas Instruments TL2575-15IKTTR
- Part No.:
- TL2575-15IKTTR
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
TL2575-15IKTTR.pdf
- Description:
- IC REG BUCK 15V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:2,319
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Product details
Overview
TL2575-15IKTTR from Texas Instruments is a fixed-output 15-V, 1-A step-down (buck) switching voltage regulator in TO-263-5 (KTT) package. It operates from 18 V to 40 V input, delivers ±5% output regulation over line, load, and temperature, and achieves up to 88% efficiency at 1-A load with 18-V input. It is used in industrial power supplies where compact, heatsink-free 15-V DC rails are required.
For engineers reviewing the TL2575-15IKTTR datasheet, TL2575-15IKTTR pinout, TL2575-15IKTTR application, or TL2575-15IKTTR equivalent, key selection criteria include its 52-kHz fixed-frequency operation, TTL-compatible ON/OFF control with 50-μA standby current, integrated thermal shutdown and cycle-by-cycle current limiting, and compatibility with standard off-the-shelf inductors.
Technical Context
The TL2575-15IKTTR integrates a 1-A N-channel MOSFET switch, fixed-gain error amplifier, 1.23-V bandgap reference, and 52-kHz oscillator to implement a voltage-mode controlled buck converter. Its feedback loop uses internal frequency compensation and requires no external compensation components.
It supports manual shutdown via the ON/OFF pin, entering standby mode with ≤200-μA quiescent current. Protection features include thermal shutdown, cycle-by-cycle current limiting, and built-in reset logic that reduces oscillator frequency under overload to limit power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 15 V ±5% over full operating range - ensures stable rail for analog front-ends or logic interfaces without external resistive divider. |
| Output current | 1 A continuous - supports moderate-power loads such as sensors, actuators, or isolated gate drivers without derating. |
| Input voltage range | 18 V to 40 V - compatible with 24-V industrial bus systems and accommodates wide line variations. |
| Switching frequency | 52 kHz typical - enables use of low-cost, high-saturation-current inductors and simplifies EMI filtering design. |
| Efficiency | 88% typical at 18-V input, 1-A load - reduces thermal load and eliminates need for heatsink in most PCB layouts. |
| Standby current | 50 μA typical - enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Protection | Thermal shutdown + cycle-by-cycle current limiting - prevents damage during short-circuit or overload without external circuitry. |
Pinout & Package
TL2575-15IKTTR is housed in a TO-263-5 (KTT) thermally enhanced surface-mount package (10.16 mm × 8.93 mm), with exposed metal tab electrically connected to GND for improved heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated DC input | Accepts 18–40 V supply; requires local 100-μF electrolytic bypass capacitor placed adjacent to pin. |
| OUTPUT (Pin 2) | Regulated 15-V output | Drives load directly; connects to output inductor and catch diode anode; must be decoupled with ≥330-μF low-ESR capacitor. |
| GND (Pin 3) | Power and signal ground | Common return for input/output paths and IC internal circuits; tied to exposed thermal pad for thermal conduction. |
| FEEDBACK (Pin 4) | Output voltage sensing | Internally connected to 15-V output; no external resistor network required - simplifies layout and improves stability. |
| ON/OFF (Pin 5) | TTL-compatible enable/disable | Pull to GND for normal operation; apply ≥2.2 V to enter standby mode with 50-μA quiescent current. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 15-V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity while guaranteeing ±5% regulation across –40°C to +125°C. |
| Integrated 1-A switch | Enables complete buck regulator with only four external components (inductor, diode, input/output capacitors), lowering design risk and bill-of-materials cost. |
| 52-kHz fixed-frequency oscillator | Provides predictable EMI profile and simplifies filter design versus variable-frequency alternatives; avoids subharmonic oscillation in continuous conduction mode. |
| TTL shutdown capability | Allows system-level power sequencing and low-power states without additional level-shifting circuitry or external FETs. |
| Thermal and current protection | Self-contained safety mechanisms prevent latch-up or destruction during transient overloads or ambient temperature excursions - no external sensing needed. |
Applications
| Industrial Motor Drives | Factory Automation Controllers |
|---|---|
|
Use Scenario: Powering gate drivers and position sensor interfaces in servo amplifiers operating from 24-V DC bus. IC Role / Device Role / Timing Role: Primary 15-V bias rail generator for isolated IGBT/MOSFET gate drivers and analog signal conditioning stages. Use Value: Delivers regulated 15 V at 1 A with 88% efficiency, eliminating linear regulator heat buildup and enabling compact PCB layout near motor control ICs. |
Use Scenario: Supplying programmable logic controller (PLC) I/O modules requiring stable 15-V auxiliary power. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter providing noise-immune 15-V rail for analog input circuitry and optocoupler biasing. Use Value: Maintains ±5% output regulation across 18–40 V input and –40°C to +85°C ambient, ensuring consistent ADC reference and isolation barrier performance. |
| Grid Infrastructure Monitoring | Building Management Systems |
|
Use Scenario: Powering RTU (remote terminal unit) telemetry circuitry in outdoor substations with wide ambient temperature swings. IC Role / Device Role / Timing Role: Main 15-V supply for microcontroller peripherals, RS-485 transceivers, and precision voltage references. Use Value: Operates reliably from –40°C to +125°C junction temperature with integrated thermal shutdown, avoiding field failures due to enclosure heating. |
Use Scenario: Generating 15-V power for HVAC actuator controllers and environmental sensor nodes in commercial buildings. IC Role / Device Role / Timing Role: Compact, heatsink-free DC-DC stage converting 24-V building bus to 15-V for analog sensor signal chains. Use Value: Achieves 88% efficiency at full load, minimizing self-heating in enclosed DIN-rail enclosures and extending component lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575HVS-15 | Same 15-V fixed output, but rated for 60-V max input (HV variant); higher RθJA (35°C/W vs. 26.5°C/W in KTT package). | Better suited for 48-V telecom or solar-input systems; less thermally efficient in space-constrained industrial PCBs. | Choose LM2575HVS-15 only if input exceeds 40 V; otherwise TL2575-15IKTTR offers superior thermal performance in TO-263. |
| TPS5430DDAR | Adjustable 0.8–35 V output, 3-A rating, 500-kHz switching; requires external feedback resistors and compensation. | Supports dynamic voltage scaling and higher current, but increases design complexity and component count. | Select TPS5430DDAR when adjustable output or >1-A load is required; TL2575-15IKTTR remains optimal for simple, fixed 15-V, 1-A needs. |
Compared with LM2575HVS-15 and TPS5430DDAR, TL2575-15IKTTR provides the lowest design effort for fixed 15-V/1-A conversion, combining minimal external parts, proven thermal behavior in TO-263, and guaranteed ±5% regulation without trimming or calibration.
Availability
TL2575-15IKTTR is available at Aetrix Electronics and suitable for industrial motor drives, factory automation controllers, grid infrastructure monitoring, and building management systems requiring stable component supply and long-term manufacturability.
Supply support for TL2575-15IKTTR 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 specializing in analog, embedded processing, and power management technologies, with decades of leadership in power conversion ICs.
The TL2575 family was designed as a drop-in replacement for linear regulators in medium-power industrial and automation applications, delivering high efficiency and simplified design through integrated switching and protection functions.
FAQ
What is the maximum input voltage rating for TL2575-15IKTTR?
The TL2575-15IKTTR has a maximum input voltage rating of 40 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. For applications requiring higher input (e.g., 48-V systems), the TL2575HV-15IKTTR variant - rated for up to 60 V - should be used instead. The TL2575-15IKTTR is optimized for 18–40 V industrial bus inputs and must not be substituted with HV variants without verifying pin compatibility and thermal limits.
Does TL2575-15IKTTR require external feedback resistors?
No, TL2575-15IKTTR does not require external feedback resistors. As a fixed-output variant, its FEEDBACK pin is internally connected to the 15-V output stage. External resistors are only needed for the adjustable TL2575-ADJ version. This internal connection eliminates resistor tolerance errors and layout sensitivity, contributing to the guaranteed ±5% output regulation across temperature and load conditions.
How does the ON/OFF pin function on TL2575-15IKTTR?
The ON/OFF pin on TL2575-15IKTTR is TTL-compatible: grounding or applying <1.2 V enables normal operation, while applying ≥2.2 V places the device in standby mode with ≤200-μA quiescent current. The pin must not be left floating; it may be pulled up to VIN via a 100-kΩ resistor. This feature enables precise system-level power sequencing and low-power sleep states without external MOSFET switches.
What package type is used for TL2575-15IKTTR?
TL2575-15IKTTR is supplied in the TO-263-5 (KTT) package - a thermally enhanced surface-mount variant measuring 10.16 mm × 8.93 mm with an exposed GND-connected thermal pad. This package provides a junction-to-ambient thermal resistance (RθJA) of 26.5°C/W, significantly lower than the PDIP or TO-220 versions, making it ideal for high-reliability industrial PCBs where airflow is limited and heatsinking is impractical.
Can TL2575-15IKTTR replace a linear regulator in existing designs?
Yes, TL2575-15IKTTR can directly replace linear regulators like LM7815 in many applications, provided input voltage exceeds 18 V and external components (inductor, diode, input/output capacitors) are added. Its 88% efficiency eliminates heatsink requirements common with linear regulators dissipating >3 W, reducing board area and improving system reliability. Layout changes are required to accommodate the buck topology, but no modifications to downstream 15-V circuitry are needed.
TL2575-15IKTTR 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):
- 15V
- 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)
TL2575-15IKTTR FAQ
1.How can I place an order for TL2575-15IKTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575-15IKTTR 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 TL2575-15IKTTR reliable?
The price and inventory of TL2575-15IKTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575-15IKTTR is usually 5 days.
3.What payment methods are accepted for TL2575-15IKTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575-15IKTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575-15IKTTR?
TL2575-15IKTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575-15IKTTR 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 TL2575-15IKTTR?
For technical support, including TL2575-15IKTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575-15IKTTR requirements.
6.How does Aetrix verify that TL2575-15IKTTR is sourced from the original manufacturer or authorized distributors?
All TL2575-15IKTTR 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 TL2575-15IKTTR meets industry standards.
7.What is the process for return or replacement of TL2575-15IKTTR?
All TL2575-15IKTTR units undergo pre-shipment inspection (PSI). If there is an issue with TL2575-15IKTTR, 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 TL2575-15IKTTR part is unused and in its original packaging.
Return procedure for TL2575-15IKTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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