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Texas Instruments TL2575HV-33IKTTR
- Part No.:
- TL2575HV-33IKTTR
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
TL2575HV-33IKTTR.pdf
- Description:
- IC REG BUCK 3.3V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:771
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Product details
Overview
TL2575HV-33IKTTR from Texas Instruments is a fixed-output 3.3-V, 1-A step-down (buck) switching voltage regulator in TO-263-5 package, featuring 4.75–60 V input range, ±5% output regulation over line/load/temperature, 52-kHz fixed-frequency operation, and TTL-compatible ON/OFF shutdown. It delivers high efficiency up to 88% and integrates thermal shutdown, cycle-by-cycle current limiting, and internal compensation for industrial power supplies.
For engineers reviewing the TL2575HV-33IKTTR datasheet, TL2575HV-33IKTTR pinout, TL2575HV-33IKTTR application, or TL2575HV-33IKTTR equivalent, key selection criteria include its 60-V max input rating, 3.3-V fixed output with tight regulation, low 50-μA standby current, integrated 1-A switch, and compatibility with standard off-the-shelf inductors in minimal external-component designs.
Technical Context
The TL2575HV-33IKTTR implements a synchronous-buck topology using an internal N-channel MOSFET switch driven by a fixed 52-kHz oscillator and error amplifier referenced to a 1.23-V bandgap. Its control loop employs internal frequency compensation and cycle-by-cycle current limiting to maintain stability across wide input (4.75–60 V) and load (0–1 A) ranges.
It operates in continuous conduction mode under full load and transitions to discontinuous mode below ~200 mA. Shutdown is asserted via TTL-level high signal on the ON/OFF pin, reducing quiescent current to 50 μA typical while disabling switching and output regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±5% over line, load, and temperature - ensures stable rail for microcontrollers and logic without external feedback resistors. |
| Input Voltage Range | 4.75 V to 60 V - supports wide industrial DC inputs including 24-V, 48-V, and battery-backed systems. |
| Max Output Current | 1 A continuous - sufficient to power FPGA I/O banks, sensor interfaces, or multiple MCU peripherals. |
| Switching Frequency | 52 kHz typical - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity. |
| Standby Current | 50 μA typical - minimizes system-level power loss during sleep or fault states. |
| Efficiency | Up to 88% at 12-V input / 1-A load - reduces thermal load versus linear regulators and eliminates heatsink in many applications. |
| Protection Features | Thermal shutdown + cycle-by-cycle current limiting - prevents damage during overload, short-circuit, or high-temperature operation. |
Pinout & Package
TL2575HV-33IKTTR 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 | Accepts unregulated DC input from 4.75 V to 60 V; requires local 100-μF electrolytic bypass capacitor. |
| OUTPUT (Pin 2) | Regulated Output | Delivers 3.3-V, up to 1-A regulated output; connects to output inductor and bulk capacitor. |
| GND (Pin 3) | Power Ground | Main return path for input/output currents; must be low-impedance and tied to thermal pad for thermal performance. |
| FEEDBACK (Pin 4) | Regulation Sense | Internally connected to 3.3-V output; no external resistor required for fixed version. |
| ON/OFF (Pin 5) | Shutdown Control | TTL-compatible digital input: <1.6 V = active, >2.2 V = standby; pulls up to VIN if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1-A Power Switch | Eliminates need for external MOSFET and gate driver, reducing BOM count and layout area. |
| Internal Frequency Compensation | Enables stable operation with only four external components (input cap, output cap, inductor, diode) - no loop tuning required. |
| Fixed 3.3-V Output | Guarantees precise rail without resistor divider errors, drift, or noise susceptibility - ideal for sensitive analog/digital interfaces. |
| TTL Shutdown Interface | Allows seamless integration with microcontroller GPIOs or system-level power sequencing without level-shifting circuitry. |
| Wide 4.75–60 V Input Range | Supports direct connection to automotive battery (cold-crank), industrial 24/48-V rails, and telecom backup supplies. |
Applications
| Industrial Motor Drives | Grid Infrastructure Monitoring |
|---|---|
Use Scenario: Powering gate drivers, isolation amplifiers, and MCU cores in variable-frequency drives operating from 24-V or 48-V DC bus. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator supplying isolated control logic and sensing circuitry. Use Value: Withstands 60-V transients common in motor drive DC-link environments and maintains regulation during load dumps. | Use Scenario: Providing stable 3.3-V supply to RTUs, PMUs, and communication modules in substation automation cabinets. IC Role / Device Role / Timing Role: Main DC-DC converter powering ARM-based processors and RS-485 transceivers in outdoor-rated enclosures. Use Value: Operates reliably from –40°C to +125°C junction temperature and tolerates wide input fluctuations from solar/battery hybrid sources. |
| Factory Automation PLCs | Building Management Systems |
Use Scenario: Generating 3.3-V rail for programmable logic controllers handling I/O expansion, Ethernet PHYs, and real-time OS execution. IC Role / Device Role / Timing Role: High-current, low-noise power stage delivering clean supply to timing-critical digital subsystems. Use Value: Delivers 1-A continuous current with <±5% regulation across 4.75–60 V input - accommodates brownout and surge conditions per IEC 61000-4-5. | Use Scenario: Supplying HVAC controllers, smart sensors, and wireless gateways deployed in commercial HVAC ducts and lighting panels. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC solution replacing linear regulators to eliminate heatsinks in space-constrained enclosures. Use Value: Achieves up to 88% efficiency at full load - reduces internal cabinet temperature rise and extends 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 |
|---|---|---|---|
| LM2575HV-3.3 | Same 3.3-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-33IKTTR layouts but may require minor loop stability verification due to different phase margin profile. | Select LM2575HV-3.3 only when legacy design reuse or second-source qualification is required; verify startup behavior under light load. |
| TPS54332DR | 3.3-V adjustable output (requires external resistors), 3-A capability, 2.95–60 V input, 1-MHz switching - smaller solution size but higher cost and design complexity. | Not drop-in: requires redesign of feedback network, inductor, and compensation; suited for higher-current or space-constrained applications. | Choose TPS54332DR only when >1-A output or faster transient response is needed; not suitable for direct replacement without layout changes. |
Compared with LM2575HV-3.3 and TPS54332DR, TL2575HV-33IKTTR offers optimal balance of simplicity (no feedback resistors), proven thermal robustness in TO-263, and industry-standard 52-kHz frequency - making it preferred for cost-sensitive, high-reliability industrial power stages where 1-A output suffices.
Availability
TL2575HV-33IKTTR is available at Aetrix Electronics and suitable for industrial motor drives, grid infrastructure monitoring, and factory automation PLCs requiring stable component supply across extended temperature and voltage ranges.
Supply support for TL2575HV-33IKTTR 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 ICs, with leadership in high-reliability industrial and automotive solutions.
The TL2575HV product line was designed to replace three-terminal linear regulators in industrial power conversion, delivering 1-A buck regulation with minimal external components and 60-V input tolerance for harsh environments.
FAQ
What is the maximum input voltage rating for TL2575HV-33IKTTR?
The TL2575HV-33IKTTR supports a maximum input voltage of 60 V, as specified in its absolute maximum ratings. This high-voltage capability allows direct operation from 48-V industrial buses, automotive battery systems (including cold-crank conditions), and telecom power supplies without pre-regulation. Operation above 60 V risks permanent device damage and is strictly prohibited.
Does TL2575HV-33IKTTR require external feedback resistors to set the output voltage?
No, TL2575HV-33IKTTR does not require external feedback resistors. As a fixed-output variant, its internal feedback network is trimmed to deliver 3.3 V ±5% over line, load, and temperature. Pin 4 (FEEDBACK) is internally connected to the OUTPUT pin, eliminating resistor selection, placement, and drift concerns - simplifying design and improving long-term accuracy.
How does the ON/OFF pin function on TL2575HV-33IKTTR?
The ON/OFF pin (Pin 5) provides TTL-compatible shutdown control for TL2575HV-33IKTTR: applying <1.6 V enables normal regulation, while >2.2 V places the device in standby mode with 50-μA typical quiescent current. The pin must not be left floating; if unused, it should be tied to VIN through a pullup resistor to ensure reliable startup and prevent unintended shutdown.
What package type and thermal characteristics apply to TL2575HV-33IKTTR?
TL2575HV-33IKTTR uses the TO-263-5 (KTT) package with an exposed thermal pad. Its junction-to-ambient thermal resistance (RθJA) is 26.5°C/W, and junction-to-case (bottom) resistance is 0.38°C/W - enabling efficient heat transfer to the PCB copper pour. This allows 1-A continuous operation at +125°C junction temperature without external heatsinking in properly laid-out designs.
Can TL2575HV-33IKTTR be used in inverting buck-boost configurations?
Yes, TL2575HV-33IKTTR can be configured as an inverting buck-boost regulator per TI's application documentation. In this topology, the OUTPUT pin becomes the negative output rail, GND serves as the reference, and the inductor/diode orientation is modified. Output voltage magnitude remains 3.3 V, but polarity is inverted - useful for generating negative bias rails in op-amp or ADC circuits without additional ICs.
TL2575HV-33IKTTR 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):
- 3.3V
- 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-33IKTTR FAQ
1.How can I place an order for TL2575HV-33IKTTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575HV-33IKTTR 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-33IKTTR reliable?
The price and inventory of TL2575HV-33IKTTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575HV-33IKTTR is usually 5 days.
3.What payment methods are accepted for TL2575HV-33IKTTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575HV-33IKTTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575HV-33IKTTR?
TL2575HV-33IKTTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575HV-33IKTTR 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-33IKTTR?
For technical support, including TL2575HV-33IKTTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575HV-33IKTTR requirements.
6.How does Aetrix verify that TL2575HV-33IKTTR is sourced from the original manufacturer or authorized distributors?
All TL2575HV-33IKTTR 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-33IKTTR meets industry standards.
7.What is the process for return or replacement of TL2575HV-33IKTTR?
All TL2575HV-33IKTTR units undergo pre-shipment inspection (PSI). If there is an issue with TL2575HV-33IKTTR, 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-33IKTTR part is unused and in its original packaging.
Return procedure for TL2575HV-33IKTTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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