Texas Instruments TL2575HV-15IKTTR

Overview

TL2575HV-15IKTTR from Texas Instruments is a fixed-output 15-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, and temperature, and integrates a 1-A switch, 52-kHz oscillator, thermal shutdown, and cycle-by-cycle current limiting. It is used in industrial power supplies requiring high-input-voltage DC-DC conversion with minimal external components.

For engineers reviewing the TL2575HV-15IKTTR datasheet, TL2575HV-15IKTTR pinout, TL2575HV-15IKTTR application, or TL2575HV-15IKTTR equivalent, key selection criteria include its 60-V max input rating, 15-V fixed output, ON/OFF logic control, thermal protection behavior, and compatibility with standard 330-µH inductors and Schottky catch diodes.

Technical Context

The TL2575HV-15IKTTR implements a fixed-frequency, current-mode buck regulator architecture with internal 1.23-V bandgap reference and fixed-gain error amplifier. Its 52-kHz oscillator drives an integrated N-channel MOSFET switch capable of 1-A continuous output, with duty cycle up to 98% and saturation voltage ≤1.2 V at 1 A.

It features TTL-compatible ON/OFF pin control enabling standby mode with 50-μA typical quiescent current, plus built-in thermal shutdown and cycle-by-cycle current limiting that reduces oscillator frequency to ~18 kHz under overload. Feedback is internally connected for fixed 15-V operation - no external resistors required.

Key Specifications

Pinout & Package

TL2575HV-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.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck regulator applications.

Compared with LM2596HV-15 and TPS54160DGQ, TL2575HV-15IKTTR delivers verified 15-V fixed output with zero external feedback components, lower EMI due to 52-kHz operation, and simpler thermal management - making it optimal for cost-sensitive, high-reliability industrial 15-V rails where output voltage stability is non-negotiable.

Availability

TL2575HV-15IKTTR is available at Aetrix Electronics and suitable for industrial motor drives, grid infrastructure monitoring, factory automation PLC I/O, and building management systems requiring stable component supply across extended temperature and high-input-voltage conditions.

Supply support for TL2575HV-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 headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and communications markets.

TL2575HV-15IKTTR belongs to TI's legacy buck regulator product line, engineered specifically for rugged, low-component-count DC-DC conversion in industrial power supplies where reliability, wide input range, and fixed-output simplicity are prioritized over programmability.

FAQ

What is the maximum input voltage supported by TL2575HV-15IKTTR?

The TL2575HV-15IKTTR supports a maximum input voltage of 60 V, as specified in its absolute maximum ratings. This rating applies across the full operating temperature range and enables use in 48-V industrial systems with headroom for transients. Exceeding 60 V risks permanent device damage, regardless of duration or duty cycle. The recommended operating range remains 4.75 V to 60 V for reliable 15-V output regulation.

Does TL2575HV-15IKTTR require external feedback resistors to set the 15-V output?

No, TL2575HV-15IKTTR does not require external feedback resistors. It is a factory-configured fixed-output variant with internal feedback connection to the 15-V output node. Pin 4 (FEEDBACK) is internally tied and must not be externally modified. This eliminates resistor tolerance errors and PCB layout sensitivity, ensuring ±5% output accuracy over line, load, and temperature without user calibration.

How does the ON/OFF pin function on TL2575HV-15IKTTR?

The ON/OFF pin (Pin 5) of TL2575HV-15IKTTR enables TTL-compatible shutdown: grounding or applying <1.2 V activates normal operation, while applying >2.2 V places the device in standby mode with 50-μA typical quiescent current. The pin must never be left floating; a 10-kΩ pull-down resistor is recommended for robust default-on behavior. This feature supports system-level power sequencing and low-power sleep states.

What thermal performance can be expected from TL2575HV-15IKTTR in TO-263-5 package?

In the TO-263-5 (KTT) package, TL2575HV-15IKTTR has a junction-to-ambient thermal resistance (R_θJA) of 26.5°C/W when mounted on a 1-in² 2-oz copper pad with thermal vias. At 1-A load and 30-V input, power dissipation is ~15 W, resulting in ~400°C rise above ambient - confirming mandatory heatsinking or airflow. The exposed GND tab must be soldered to a large copper area to achieve rated thermal performance; insufficient copper degrades R_θJA significantly.

Can TL2575HV-15IKTTR be used in inverting buck-boost configurations?

Yes, TL2575HV-15IKTTR can be configured as an inverting buck-boost regulator per TI's application notes, though its fixed 15-V output is then inverted to –15 V. This requires repositioning the inductor and diode, grounding the OUTPUT pin, and routing the negative output from VIN. Efficiency drops ~5–10% versus buck mode, and output current capability is reduced due to increased conduction losses. The 60-V input rating remains valid, supporting |V_IN| up to 60 V in this topology.