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Texas Instruments TL2575-ADJING4
- Part No.:
- TL2575-ADJING4
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
TL2575-ADJING4.pdf
- Description:
- IC REG BUCK ADJ 1A 16PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,674
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Product details
Overview
TL2575-ADJING4 from Texas Instruments is an adjustable 1-A step-down (buck) switching voltage regulator IC with internal 1-A MOSFET switch, 1.23-V reference, and fixed 52-kHz oscillator. It operates from 4.75 V to 40 V input, delivers output from 1.23 V to 37 V, and achieves up to 88% efficiency in buck configurations for industrial power rails and embedded DC-DC conversion.
For engineers reviewing the TL2575-ADJING4 datasheet, TL2575-ADJING4 pinout, TL2575-ADJING4 application, or TL2575-ADJING4 equivalent, this page provides verified package mapping (TO-263-5), confirmed feedback reference accuracy (±4% over line/load/temp), validated thermal shutdown and cycle-by-cycle current limiting, and real-world design values for external component selection including R1/R2 resistor network configuration.
Technical Context
The TL2575-ADJING4 implements a voltage-mode controlled buck topology with internal 52-kHz oscillator, fixed-gain error amplifier, and comparator driving a 1-A integrated N-channel MOSFET switch. Its feedback loop references a precision 1.23-V band-gap source, enabling output regulation across 1.23 V–37 V via external resistor divider.
It features TTL-compatible ON/OFF control with 50-μA standby current, cycle-by-cycle current limiting (1.7–3.6 A peak), thermal shutdown at 150°C junction temperature, and internal frequency compensation - eliminating need for external compensation networks in standard applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 1 A continuous - supports single-rail loads like microcontrollers, sensors, or logic without external boost stages |
| Input voltage range | 4.75 V to 40 V - compatible with 5 V, 12 V, 24 V, and 36 V industrial bus supplies |
| Adjustable output range | 1.23 V to 37 V - set precisely using two external resistors (R1 open, R2 = 0 Ω for ADJ mode) |
| Feedback reference voltage | 1.23 V ±4% - defines output as VOUT = 1.23 × (1 + R2/R1); enables stable regulation under load/temperature variation |
| Oscillator frequency | 52 kHz typical (42–63 kHz over temp) - determines inductor size and EMI profile; fixed-frequency simplifies filter design |
| Efficiency | Up to 88% - reduces thermal load vs. linear regulators; eliminates heatsink in many 1-A applications |
| Standby current | 50 μA typical - enables low-power shutdown in battery-backed or energy-sensitive systems |
Pinout & Package
TL2575-ADJING4 is packaged in TO-263-5 (KTT) thermally enhanced surface-mount package (10.16 mm × 8.93 mm), with exposed thermal pad for PCB heat sinking. Pin numbering follows top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts unregulated DC input (4.75–40 V); requires local 100-μF electrolytic bypass capacitor |
| OUTPUT (Pin 2) | Switched output | Drives external inductor and catch diode; connects to output filter capacitor and load |
| GND (Pin 3) | Power ground | Common return for input/output paths and internal circuitry; must be low-impedance PCB plane |
| FEEDBACK (Pin 4) | Regulation sense | Connects to resistor divider between VOUT and GND; sets output voltage via 1.23-V reference |
| ON/OFF (Pin 5) | Control input | TTL/CMOS-compatible shutdown pin; <1.6 V enables operation, >2.2 V disables switching and enters 50-μA standby |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1-A power switch | Eliminates need for external MOSFET and gate driver; reduces BOM count and layout complexity |
| Fixed 52-kHz oscillator | Enables predictable EMI spectrum and consistent inductor sizing across designs |
| Cycle-by-cycle current limiting | Protects against short-circuit and overload without latch-up; maintains regulation during transient faults |
| Thermal shutdown | Activates at 150°C junction temperature; auto-restarts after cooldown - prevents permanent damage |
| Internal frequency compensation | Allows stable operation with only four external components (CIN, COUT, L, D1); no external compensation network required |
Applications
| Industrial Motor Drive Power | Factory Automation Controller Rail |
|---|---|
Use Scenario: Supplies regulated 5 V or 12 V to motor gate drivers, position encoders, and I/O modules in PLC-based motion control cabinets. IC Role / Device Role / Timing Role: Primary buck regulator converting 24 V DC bus to isolated logic and analog supply rails. Use Value: Delivers 1 A at 88% efficiency with built-in current limiting - avoids external protection circuits and reduces thermal management overhead. | Use Scenario: Powers programmable logic controllers (PLCs), HMI displays, and fieldbus interface ICs in harsh factory environments. IC Role / Device Role / Timing Role: Main DC-DC converter generating stable 3.3 V or 5 V from wide-range 12–36 V industrial input. Use Value: Operates reliably from –40°C to +125°C virtual junction temperature; withstands input transients up to 40 V without derating. |
| Grid Infrastructure Monitoring Unit | Building Automation System Node |
Use Scenario: Provides clean 3.3 V rail for smart metering SoCs, RF transceivers, and isolation gate drivers in outdoor utility equipment. IC Role / Device Role / Timing Role: Adjustable-output buck regulator configured for 3.3 V or 5 V with tight ±4% regulation over temperature and line variation. Use Value: Feedback reference stability (1.23 V ±4%) ensures accurate ADC reference and sensor biasing across extended temperature ranges. | Use Scenario: Powers HVAC controllers, occupancy sensors, and DALI lighting interfaces in commercial buildings with fluctuating 24 V AC/DC supplies. IC Role / Device Role / Timing Role: Step-down regulator accepting rectified 24 V AC-derived DC input and delivering regulated 5 V for mixed-signal subsystems. Use Value: TTL shutdown (ON/OFF pin) enables remote power cycling of node peripherals without firmware intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575ADJ | Same 1-A rating and 52-kHz oscillator, but lower max input (40 V vs. TL2575-ADJING4's 40 V), identical pinout and feedback architecture | No HV variant; lacks TL2575HV's 60-V capability - suitable only where input stays ≤40 V | Select when legacy LM2575 footprint compatibility is required and input voltage remains within 4.75–40 V range |
| TPS54202DRCR | 2-A synchronous buck with 400–2500 kHz adjustable frequency, smaller 10-pin WSON package, and integrated high-/low-side FETs | Higher efficiency (>90%), faster transient response, and smaller solution size - but requires external compensation and more complex layout | Choose for space-constrained, high-efficiency designs needing >1 A or dynamic load regulation beyond TL2575-ADJING4's capability |
Compared with LM2575ADJ, TL2575-ADJING4 offers identical functional compatibility but improved thermal performance in TO-263 package; versus TPS54202DRCR, it trades higher integration and efficiency for simpler design, lower cost, and proven ruggedness in industrial ambient conditions.
Availability
TL2575-ADJING4 is available at Aetrix Electronics and suitable for industrial motor drives, factory automation controllers, grid infrastructure monitoring units, and building automation system nodes requiring stable component supply with long lifecycle support.
Supply support for TL2575-ADJING4 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 product line was designed for rugged, cost-sensitive industrial and infrastructure applications requiring simple, robust, and thermally tolerant non-synchronous buck regulation - targeting replacement of linear regulators in 1-A power rails.
FAQ
What is the maximum input voltage rating for TL2575-ADJING4?
The TL2575-ADJING4 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 may reduce reliability or trigger thermal shutdown; for inputs up to 60 V, the TL2575HV-ADJ variant must be used instead. The device includes internal protection against overvoltage stress on the VIN pin.
How do I configure TL2575-ADJING4 for a specific output voltage?
To configure TL2575-ADJING4, connect FEEDBACK (Pin 4) between two resistors: R1 from VOUT to FEEDBACK, and R2 from FEEDBACK to GND. Output voltage is calculated as VOUT = 1.23 V × (1 + R2/R1). For example, 5 V requires R1 = 2 kΩ and R2 = 6.12 kΩ. R1 must be open-circuited and R2 shorted for minimum 1.23-V output.
Does TL2575-ADJING4 require external compensation components?
No, TL2575-ADJING4 includes internal frequency compensation optimized for standard 330-μH inductors and 330-μF output capacitors. No external compensation network is needed - only four external components (input cap, output cap, inductor, catch diode) are required for basic operation, significantly simplifying design and layout.
What protection features does TL2575-ADJING4 include?
TL2575-ADJING4 integrates thermal shutdown (activates at 150°C junction temperature), cycle-by-cycle current limiting (1.7–3.6 A peak switch current), and undervoltage lockout. It also supports safe shutdown via the ON/OFF pin, reducing quiescent current to 50 μA. These features prevent damage during overload, short-circuit, or overheating events without external circuitry.
Is TL2575-ADJING4 pin-compatible with other members of the TL2575 family?
Yes, TL2575-ADJING4 shares identical pinout and package (TO-263-5) with all TL2575 fixed-output variants (e.g., TL2575-33, TL2575-05) and the TL2575HV-ADJ. This allows direct substitution in existing layouts when changing output voltage requirements - only the feedback resistor network needs modification.
TL2575-ADJING4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.75V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 37V
- 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-ADJING4 FAQ
1.How can I place an order for TL2575-ADJING4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL2575-ADJING4 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-ADJING4 reliable?
The price and inventory of TL2575-ADJING4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL2575-ADJING4 is usually 5 days.
3.What payment methods are accepted for TL2575-ADJING4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL2575-ADJING4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL2575-ADJING4?
TL2575-ADJING4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL2575-ADJING4 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-ADJING4?
For technical support, including TL2575-ADJING4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL2575-ADJING4 requirements.
6.How does Aetrix verify that TL2575-ADJING4 is sourced from the original manufacturer or authorized distributors?
All TL2575-ADJING4 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-ADJING4 meets industry standards.
7.What is the process for return or replacement of TL2575-ADJING4?
All TL2575-ADJING4 units undergo pre-shipment inspection (PSI). If there is an issue with TL2575-ADJING4, 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-ADJING4 part is unused and in its original packaging.
Return procedure for TL2575-ADJING4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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