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Texas Instruments TL2575HV-33IN
- Part No.:
- TL2575HV-33IN
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
TL2575HV-33IN.pdf
- Description:
- IC REG BUCK 3.3V 1A 16PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,386
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Product details
Overview
TL2575HV-33IN from Texas Instruments is a fixed-output 3.3-V, 1-A step-down (buck) switching voltage regulator IC with integrated 1-A power switch, 4.75–60 V input range, ±5% output regulation over line/load/temperature, and 52-kHz fixed-frequency operation. It delivers high-efficiency DC/DC conversion for industrial power rails requiring robust input voltage tolerance and thermal resilience.
For engineers reviewing the TL2575HV-33IN datasheet, TL2575HV-33IN pinout, TL2575HV-33IN application, or TL2575HV-33IN equivalent, key selection criteria include its 60-V absolute maximum input rating, ON/OFF shutdown capability (50-μA standby), thermal shutdown protection, cycle-by-cycle current limiting, and compatibility with standard off-the-shelf inductors in minimal-component buck designs.
Technical Context
The TL2575HV-33IN implements a fixed-frequency, current-mode buck regulator architecture with internal 52-kHz oscillator, integrated N-channel MOSFET switch, and fixed-gain error amplifier referenced to a 1.23-V bandgap. Its feedback loop is internally compensated and requires only a direct connection from OUTPUT to FEEDBACK for fixed 3.3-V operation.
It operates across –40°C to +125°C virtual junction temperature, supports manual shutdown via TTL-compatible ON/OFF pin (VIH ≥ 2.2 V, VIL ≤ 1.2 V), and features cycle-by-cycle current limiting, thermal shutdown, and automatic foldback under overload-reducing oscillator frequency to ~18 kHz and duty cycle to ~2% during fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±5% over full line (4.75–60 V), load (0.2–1 A), and temperature (–40 to 125°C) range |
| Input Voltage Range | 4.75 V to 60 V - enables direct regulation from 48-V telecom, industrial, or battery-derived supplies without pre-regulation |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems |
| Switching Frequency | 52 kHz typical - balances EMI control, inductor size, and efficiency; fixed-frequency simplifies EMI filtering design |
| Standby Current | 50 μA typical at shutdown - supports low-power sleep modes in battery-backed or energy-conscious systems |
| Efficiency | Up to 88% typical - reduces thermal load vs. linear regulators; eliminates heatsink in many 1-A applications |
| Protection Features | Thermal shutdown, cycle-by-cycle current limiting, and automatic frequency/duty-cycle foldback during overload or short-circuit |
Pinout & Package
TL2575HV-33IN is available in PDIP-16 (19.31 mm × 6.35 mm), TO-263-5 (KTT), and TO-220-5 (KV) packages. The IN suffix denotes the PDIP-16 variant per TI's orderable addendum.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Unregulated DC input supply (4.75–60 V); requires local 100-μF electrolytic bypass capacitor |
| OUTPUT (Pin 2) | Regulated Output | 3.3-V switched output node; connects to inductor, catch diode anode, and output capacitor positive terminal |
| GND (Pin 3) | Power Ground | Main power return path; must be low-impedance and thermally coupled to PCB copper pour for thermal management |
| FEEDBACK (Pin 4) | Voltage Sense | Internally connected to 3.3-V output for fixed version; no external resistor network required |
| ON/OFF (Pin 5) | Shutdown Control | TTL-compatible enable input; <1.2 V = active, >2.2 V = shutdown (50-μA IQ) |
| NC (Pins 6–15) | No Connect | Not bonded; must remain unconnected and un-routed on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1-A Power Switch | Eliminates external MOSFET and gate driver; reduces BOM count and layout complexity in buck converters |
| Wide 4.75–60 V Input Range | Supports direct regulation from 24-V, 36-V, and 48-V industrial bus rails without intermediate pre-regulators |
| Fixed 3.3-V Output with ±5% Regulation | Meets I/O voltage requirements of ARM Cortex-M, FPGA I/O banks, and industrial communication interfaces (RS-485, CAN) |
| TTL Shutdown with 50-μA Standby | Enables system-level power sequencing and ultra-low-power sleep states in battery or energy-harvesting applications |
| Internal Frequency Compensation | Requires only four external components (CIN, COUT, L, D) - accelerates design cycle and improves stability margin across operating conditions |
Applications
| Industrial Motor Drive Power Supply | Smart Grid Sensor Node |
|---|---|
Use Scenario: Powers logic and analog circuitry (MCU, ADC, isolation drivers) in 24-V or 48-V motor control modules where input transients exceed 40 V. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator delivering stable rail for real-time control firmware and precision signal conditioning. Use Value: Withstands 60-V abs max input and includes thermal/current protection-ensures uninterrupted operation during bus voltage surges or stall-induced current spikes. | Use Scenario: Supplies 3.3-V rail to wireless sensor nodes deployed in outdoor substations or distribution cabinets with wide ambient temperature swings. IC Role / Device Role / Timing Role: High-reliability DC/DC converter operating from lithium-thionyl chloride or supercapacitor backup sources with variable voltage decay. Use Value: –40°C to 125°C rated operation and 50-μA shutdown current extend field lifetime and support cold-weather deployment without derating. |
| Factory Automation I/O Module | Building Management System Controller |
Use Scenario: Generates 3.3-V supply for programmable logic controllers (PLCs) and digital I/O expansion cards powered from 24-V DC industrial power supplies. IC Role / Device Role / Timing Role: Main point-of-load regulator converting noisy 24-V factory bus to clean, regulated 3.3-V for FPGA configuration and Ethernet PHYs. Use Value: Fixed 3.3-V output with ±5% regulation ensures reliable boot and communication across varying load steps and input ripple. | Use Scenario: Powers HVAC controllers, occupancy sensors, and DALI lighting interfaces in commercial buildings where 24-V AC/DC supplies exhibit wide voltage variation. IC Role / Device Role / Timing Role: Robust buck regulator handling brownouts and surges common in shared building power infrastructure. Use Value: 60-V input rating and cycle-by-cycle current limiting prevent latch-up during transformer inrush or wiring faults-improving system uptime. |
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; but uses different internal compensation and has higher quiescent current (11 mA vs. 5–10 mA) | Lacks ON/OFF shutdown pin; requires external enable circuitry for low-power modes | Choose LM2575HV-3.3 only if legacy design reuse or cost sensitivity outweighs need for integrated shutdown control. |
| TPS54302DDCR | 3.3-V adjustable output (via resistors), 3-A rating, 60-V max input, 400-kHz switching, and integrated soft-start; smaller 8-pin SOIC package | Higher switching frequency enables smaller magnetics; lacks built-in thermal foldback behavior of TL2575HV family | Prefer TPS54302DDCR when board space is constrained and higher output current headroom is needed-but verify loop stability with external compensation. |
Compared with LM2575HV-3.3 and TPS54302DDCR, TL2575HV-33IN offers unique integration of TTL shutdown, fixed 3.3-V output with no external resistors, and proven thermal foldback behavior-making it optimal for cost-sensitive, thermally demanding industrial buck applications where simplicity and ruggedness are prioritized over footprint or frequency agility.
Availability
TL2575HV-33IN is available at Aetrix Electronics and suitable for industrial motor drives, smart grid sensor nodes, factory automation I/O modules, and building management system controllers requiring stable component supply across extended temperature and voltage ranges.
Supply support for TL2575HV-33IN 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 industrial and automotive power solutions.
The TL2575HV product line was designed specifically for rugged, low-component-count buck conversion in industrial environments-emphasizing wide-input-voltage tolerance, integrated protection, and ease of implementation without external compensation.
FAQ
What is the maximum input voltage rating for TL2575HV-33IN?
The TL2575HV-33IN has an absolute maximum input voltage rating of 60 V, with recommended operating range from 4.75 V to 60 V. This high input rating allows direct regulation from 48-V industrial buses, telecom supplies, or battery stacks without pre-regulation stages. Exceeding 60 V risks permanent damage, per TI's Absolute Maximum Ratings table.
Does TL2575HV-33IN require external feedback resistors?
No, TL2575HV-33IN does not require external feedback resistors. As a fixed 3.3-V output variant, its FEEDBACK pin is internally configured to sense the output directly-requiring only a short trace from OUTPUT to FEEDBACK (Pin 4). External resistors are only needed for the adjustable (ADJ) versions of the TL2575HV family.
How does the ON/OFF pin function on TL2575HV-33IN?
The ON/OFF pin (Pin 5) provides TTL-compatible shutdown control: grounding or applying <1.2 V enables normal operation, while applying >2.2 V places TL2575HV-33IN into standby mode with 50-μA typical quiescent current. The pin must not be left floating and may be pulled up to VIN through a resistor for default-on behavior.
What thermal protection mechanisms are built into TL2575HV-33IN?
TL2575HV-33IN integrates thermal shutdown that disables the internal switch when junction temperature exceeds ~150°C. Upon cooling, it automatically recovers. Additionally, under overload or short-circuit, it employs cycle-by-cycle current limiting and reduces oscillator frequency to ~18 kHz with duty cycle foldback to ~2%, lowering average power dissipation and preventing thermal runaway.
Can TL2575HV-33IN operate without a heatsink?
Yes, TL2575HV-33IN can operate without an external heatsink in many applications due to its high efficiency (up to 88%) and thermal design. In PDIP-16 (IN suffix), RθJA is 67°C/W; with adequate PCB copper area (≥4 cm² thermal pad connected to GND), it sustains 1-A load at ambient ≤60°C. For sustained 1-A operation above 60°C ambient or in enclosed enclosures, a small heatsink or forced airflow is recommended.
TL2575HV-33IN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- 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):
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
TL2575HV-33IN FAQ
1.How can I place an order for TL2575HV-33IN through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575HV-33IN 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-33IN reliable?
The price and inventory of TL2575HV-33IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575HV-33IN is usually 5 days.
3.What payment methods are accepted for TL2575HV-33IN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575HV-33IN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575HV-33IN?
TL2575HV-33IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575HV-33IN 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-33IN?
For technical support, including TL2575HV-33IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575HV-33IN requirements.
6.How does Aetrix verify that TL2575HV-33IN is sourced from the original manufacturer or authorized distributors?
All TL2575HV-33IN 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-33IN meets industry standards.
7.What is the process for return or replacement of TL2575HV-33IN?
All TL2575HV-33IN units undergo pre-shipment inspection (PSI). If there is an issue with TL2575HV-33IN, 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-33IN part is unused and in its original packaging.
Return procedure for TL2575HV-33IN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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