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Texas Instruments TL2575-12IN
- Part No.:
- TL2575-12IN
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
TL2575-12IN.pdf
- Description:
- IC REG BUCK 12V 1A 16PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,789
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Product details
Overview
TL2575-12IN from Texas Instruments is a fixed-output 12-V, 1-A step-down (buck) switching voltage regulator in a PDIP-16 package, featuring ±5% output regulation over line, load, and temperature, 4.75 V to 40 V input range, and 52-kHz fixed-frequency operation. It delivers high-efficiency power conversion for industrial control and motor drive subsystems requiring stable mid-voltage rails.
For engineers reviewing the TL2575-12IN datasheet, TL2575-12IN pinout, TL2575-12IN application, or TL2575-12IN equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, and real-world implementation guidance for buck converter design with integrated switch and ON/OFF control.
Technical Context
The TL2575-12IN integrates a 1-A N-channel MOSFET switch, fixed-gain error amplifier, 1.23-V band-gap reference, and 52-kHz oscillator to implement a self-contained buck regulator. Its internal cycle-by-cycle current limiting and thermal shutdown enable robust operation without external protection circuitry.
It operates in continuous conduction mode under full load and transitions to discontinuous mode at light loads (~200 mA), supporting flexible inductor selection. The FEEDBACK pin is internally connected to the 12-V output divider, eliminating external resistors - unlike the adjustable variant - and simplifying layout for fixed-voltage applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±5% (11.4–12.6 V) across –40°C to 125°C junction temp, full line/load range |
| Max Output Current | 1 A DC load capability with integrated switch; cycle-by-cycle current limiting prevents damage during overload |
| Input Voltage Range | 4.75 V to 40 V - supports wide industrial DC inputs including 24-V and 36-V bus systems |
| Switching Frequency | 52 kHz typical (42–63 kHz over temp) - enables use of standard off-the-shelf inductors (e.g., 330 µH) |
| Efficiency | Up to 88% at 12 VOUT/1 A with 15 VIN - reduces thermal load vs. linear regulators, often eliminating heatsink need |
| Standby Current | 50 µA typical when ON/OFF pin driven high - enables low-power sleep modes in battery-backed systems |
| Thermal Protection | Internal thermal shutdown activates at 150°C junction temperature, with automatic recovery on cooldown |
Pinout & Package
TL2575-12IN is packaged in a 16-pin plastic dual in-line package (PDIP-N), 19.31 mm × 6.35 mm body size, with through-hole mounting and GND pins on both sides for thermal and noise performance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Main unregulated DC input (4.75–40 V); requires local 100-µF electrolytic bypass capacitor |
| 2 | OUTPUT | Regulated 12-V output node; connects to output inductor and capacitor; carries full 1-A load current |
| 3 | GND | Power ground return for switch, feedback, and bias circuits; must be low-impedance PCB plane |
| 4 | FEEDBACK | Internally tied to 12-V output divider; no external resistor required - distinguishes fixed from ADJ versions |
| 5 | ON/OFF | TTL-compatible shutdown control: <1.2 V = active, >2.2 V = standby (50-µA IQ); not left floating |
| 6–8, 10–11, 14–15 | NC | No internal connection; electrically isolated; may be used as thermal pads or routing relief |
| 9, 12–13, 16 | GND | Additional ground terminals - all must be connected to common system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1-A switch | Eliminates external MOSFET and gate driver, reducing BOM count and layout complexity for 12-V/1-A buck designs |
| Fixed 12-V output | Factory-trimmed resistor network ensures ±5% accuracy without user calibration or external components |
| 52-kHz fixed oscillator | Enables predictable EMI profile and compatibility with low-cost, widely available 330-µH power inductors |
| TTL ON/OFF control | Supports system-level power sequencing and low-power sleep states with only 50-µA standby current |
| Thermal + current protection | Auto-recovering thermal shutdown and cycle-by-cycle current limiting prevent failure during fault conditions |
Applications
| Industrial Motor Drives | Building Automation Controllers |
|---|---|
|
Use Scenario: Powering microcontroller, sensor interface, and gate driver ICs in variable-frequency AC drives operating from 24-V DC bus. IC Role / Device Role / Timing Role: Primary 12-V intermediate rail regulator delivering clean, regulated power to logic and analog subsystems. Use Value: 88% efficiency at 1 A reduces heat generation in enclosed enclosures; 40-V max input accommodates 24-V bus transients. |
Use Scenario: Supplying HVAC controllers, occupancy sensors, and actuator drivers deployed in commercial buildings with 12–36-V DC distribution. IC Role / Device Role / Timing Role: Fixed-output buck converter generating stable 12-V rail from wide-input building power infrastructure. Use Value: ±5% regulation ensures reliable operation across temperature (-40°C to 125°C), critical for unconditioned ceiling-mounted units. |
| Grid Infrastructure Monitoring | Factory Automation I/O Modules |
|
Use Scenario: Powering RTU telemetry modules and isolation amplifiers in outdoor substation monitoring equipment. IC Role / Device Role / Timing Role: Input-stage DC-DC regulator converting 48-V telecom-style backup supply to 12-V system rail. Use Value: 40-V absolute max input withstands surge events per IEC 61000-4-5; thermal shutdown protects against solar-heated enclosures. |
Use Scenario: Providing auxiliary 12-V power to digital I/O expansion modules in PLC backplanes with fluctuating 24-V field power. IC Role / Device Role / Timing Role: Robust point-of-load regulator maintaining 12-V integrity despite noisy 24-V supply ripple and load steps. Use Value: Integrated current limiting prevents latch-up during short-circuited field wiring; ON/OFF pin enables hot-swap sequencing. |
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. TL2575-12IN's 40-V rating); 52-kHz frequency; same 1-A rating | Valid drop-in replacement where TI second-source qualification is required; identical thermal specs and layout | Select LM2575-12 only if dual-sourcing from National Semiconductor legacy inventory is needed; otherwise TL2575-12IN preferred for TI support continuity |
| MP1584EN-LF-Z | 3-A rated, 1.5-MHz switching, SOIC-8 package; requires external feedback resistors; no ON/OFF pin | Better suited for space-constrained, higher-current designs; lacks TTL shutdown and fixed 12-V option | Choose MP1584EN-LF-Z only when >1-A output or 1.5-MHz EMI filtering is mandatory; TL2575-12IN remains optimal for proven 1-A fixed-voltage reliability |
Compared with LM2575-12, TL2575-12IN offers identical functionality with updated TI manufacturing and documentation support; versus MP1584EN-LF-Z, it trades higher current and frequency for simplified fixed-output design, integrated shutdown, and through-hole manufacturability.
Availability
TL2575-12IN 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 and long-term production continuity.
Supply support for TL2575-12IN 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 ICs, with decades of expertise in high-reliability power conversion solutions.
The TL2575 family was designed as a robust, easy-to-use replacement for three-terminal linear regulators in industrial and automotive power supplies, emphasizing integration, thermal resilience, and minimal external component count.
FAQ
What is the maximum input voltage rating for TL2575-12IN?
The TL2575-12IN has an absolute maximum input voltage of 42 V and a recommended operating range of 4.75 V to 40 V. Exceeding 40 V continuously risks exceeding thermal limits or triggering internal protection; operation up to 42 V is only allowed as a non-repetitive stress condition per datasheet Absolute Maximum Ratings.
Does TL2575-12IN require external feedback resistors?
No, TL2575-12IN does not require external feedback resistors. As a fixed-output variant, its internal resistor divider is factory-trimmed to deliver 12 V; the FEEDBACK pin is pre-connected internally and must be tied directly to the OUTPUT pin per the datasheet - no external R1/R2 network is needed.
How does the ON/OFF pin function on TL2575-12IN?
The ON/OFF pin on TL2575-12IN enables TTL-compatible shutdown: grounding or applying <1.2 V activates regulation, while >2.2 V places the device in standby mode with 50-µA quiescent current. The pin must never be left floating and may be pulled up to VIN via a 10-kΩ resistor for default-on operation.
What package type is TL2575-12IN supplied in?
TL2575-12IN is supplied exclusively in the 16-pin plastic dual in-line package (PDIP-N), with dimensions 19.31 mm × 6.35 mm. It is not available in TO-220 or TO-263 variants - those packages correspond to other TL2575 part numbers (e.g., TL2575-12KTT).
What is the thermal resistance (RθJA) of TL2575-12IN in its PDIP package?
The junction-to-ambient thermal resistance (RθJA) for TL2575-12IN in the PDIP-16 package is 67°C/W, measured under standard JEDEC JESD51-2 conditions. This value assumes a 1-inch² copper pad on a single-layer board; actual thermal performance improves significantly with multi-layer PCBs and added copper area.
TL2575-12IN 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):
- 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:
- 16-PDIP
TL2575-12IN FAQ
1.How can I place an order for TL2575-12IN through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575-12IN 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 TL2575-12IN reliable?
The price and inventory of TL2575-12IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575-12IN is usually 5 days.
3.What payment methods are accepted for TL2575-12IN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575-12IN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575-12IN?
TL2575-12IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575-12IN 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 TL2575-12IN?
For technical support, including TL2575-12IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575-12IN requirements.
6.How does Aetrix verify that TL2575-12IN is sourced from the original manufacturer or authorized distributors?
All TL2575-12IN 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 TL2575-12IN meets industry standards.
7.What is the process for return or replacement of TL2575-12IN?
All TL2575-12IN units undergo pre-shipment inspection (PSI). If there is an issue with TL2575-12IN, 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 TL2575-12IN part is unused and in its original packaging.
Return procedure for TL2575-12IN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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