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Texas Instruments LM2575HVS-12
- Part No.:
- LM2575HVS-12
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2575HVS-12.pdf
- Description:
- IC REG BUCK 12V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:3,503
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Product details
Overview
LM2575HVS-12 from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in a 5-lead surface-mount TO-263 (DDPAK) package, delivering a fixed 12V output with ±4% tolerance across 15V–60V input and 0.2A–1A load. It integrates oscillator, PWM controller, and high-current NPN switch, enabling compact, high-efficiency power conversion without external compensation.
For engineers reviewing the LM2575HVS-12 datasheet, LM2575HVS-12 pinout, LM2575HVS-12 application, or LM2575HVS-12 equivalent, key selection considerations include its 60V max input rating, 52 kHz fixed-frequency operation, thermal shutdown, cycle-by-cycle current limiting, TTL-compatible shutdown, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2575HVS-12 implements a current-mode controlled buck topology with internal 52 kHz oscillator and integrated 3.0A peak-current-rated NPN power switch. Feedback is taken directly from the output via an internal 1.23V reference, eliminating external resistor dividers for fixed-output variants.
It operates in continuous conduction mode (CCM) over full load range, features built-in thermal shutdown at 150°C junction temperature, and provides 50 μA standby current during TTL-level shutdown activation. The HV variant supports up to 60V input, distinguishing it from standard LM2575-N (40V max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±4% over 0.2A–1A load and 15V–60V input - ensures stable rail for industrial logic and analog circuitry without trimming. |
| Input Voltage Range | 15V to 60V DC - supports wide-input applications including 24V/48V industrial buses and automotive battery-supervised systems. |
| Output Current | 1A continuous - sufficient to power microcontrollers, sensors, and peripheral ICs without external pass devices. |
| Switching Frequency | 52 kHz fixed - enables use of low-cost, high-saturation-current toroidal or drum-core inductors with minimal EMI filtering. |
| Efficiency | 88% at VIN = 15V, IOUT = 1A - reduces thermal load vs. linear regulators; eliminates need for heatsink in many PCB layouts. |
| Thermal Resistance | θJA = 37°C/W (with ≥1 in² copper pour) - enables reliable 1A operation at ambient up to 85°C without forced air. |
| Shutdown Current | 50 μA typical - supports low-power sleep modes in battery-backed or energy-conscious systems. |
Pinout & Package
LM2575HVS-12 uses a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), featuring an exposed thermal pad for enhanced heat dissipation. Pin 1 is Input, Pin 2 is Output, Pin 3 is Ground, Pin 4 is Feedback (internally tied for fixed 12V version), and Pin 5 is ON/OFF control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Unregulated DC input | Accepts 15–60V; requires local 47–100 μF electrolytic bypass capacitor to suppress switching transients. |
| Pin 2 (OUT) | Regulated 12V output | Drives 1A load; connects to output inductor and catch diode anode; requires 220–470 μF low-ESR output capacitor. |
| Pin 3 (GND) | Power and signal ground | Common return for input cap, output cap, and feedback network; must be low-inductance single-point connection. |
| Pin 4 (FEEDBACK) | Internal voltage reference node | Internally connected to 1.23V reference for fixed 12V version; no external components required. |
| Pin 5 (ON/OFF) | TTL-compatible enable/disable | Logic-high (>2.2V) enables regulation; logic-low (<0.8V) disables output and reduces quiescent current to 50 μA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated NPN power switch | 3.0A peak current rating with 0.9V saturation voltage - minimizes conduction loss and simplifies layout vs. external MOSFET solutions. |
| Fixed-frequency PWM control | 52 kHz oscillator with ±10% tolerance - enables predictable EMI filtering and avoids audible noise in sensitive environments. |
| Comprehensive protection | Thermal shutdown + cycle-by-cycle current limiting - prevents damage during overload, short-circuit, or inadequate heatsinking. |
| Low-component-count design | Only 4 external parts required (inductor, catch diode, input cap, output cap) - accelerates prototyping and reduces BOM cost. |
| Standard inductor compatibility | Optimized for off-the-shelf 330 μH inductors (e.g., Pulse PE-52627) - eliminates custom magnetics and supply-chain risk. |
Applications
| Industrial Power Supply | Automotive Subsystem Regulator |
|---|---|
|
Use Scenario: Providing clean 12V rail from 24V truck battery to power CAN transceivers and microcontroller peripherals under cold-crank and load-dump conditions. IC Role / Device Role / Timing Role: Primary buck regulator converting unregulated vehicle battery voltage to stable 12V system rail. Use Value: 60V input rating withstands ISO 7637-2 load-dump spikes; 88% efficiency reduces thermal stress in sealed enclosures. |
Use Scenario: Generating 12V for infotainment display backlight drivers and sensor interface circuits in passenger cabin modules. IC Role / Device Role / Timing Role: High-reliability DC-DC converter supplying regulated power to mixed-signal subsystems. Use Value: TTL shutdown enables coordinated power sequencing with main MCU; thermal shutdown protects against prolonged high-ambient exposure. |
| Programmable Logic Controller (PLC) I/O Module | Test & Measurement Equipment |
|
Use Scenario: Delivering isolated 12V to analog input/output channels in DIN-rail mounted PLC modules operating from 48V DC field bus. IC Role / Device Role / Timing Role: On-card step-down regulator powering precision ADCs, DACs, and isolation amplifiers. Use Value: ±4% output tolerance ensures accurate sensor scaling; 1A capability supports multiple channel drivers simultaneously. |
Use Scenario: Supplying stable 12V to op-amp front-ends and FPGA configuration circuitry in portable bench instruments. IC Role / Device Role / Timing Role: Compact, efficient pre-regulator preceding low-noise LDOs for analog signal chains. Use Value: Surface-mount TO-263 package saves board space; 52 kHz switching allows small passive component footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575T-12 | TO-220 through-hole package; 40V max input; θJA = 65°C/W (no heatsink) | Suitable for prototyping or low-volume through-hole assemblies; limited to 40V input systems | Select when mechanical mounting constraints favor through-hole or input voltage stays ≤40V. |
| LM2596S-12 | Higher 63V input rating; 1.5A output; 150 kHz switching; different pinout and compensation | Enables smaller inductors/caps but requires redesign of feedback and loop compensation network | Choose for higher current or tighter size targets, accepting layout and stability validation effort. |
Compared with LM2575T-12, LM2575HVS-12 offers superior thermal performance and 60V input capability in surface-mount form; versus LM2596S-12, it trades higher frequency and current for proven stability, simpler design, and direct drop-in replacement in legacy LM2575 layouts.
Availability
LM2575HVS-12 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2575HVS-12 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 power conversion ICs.
The LM2575HV product line was designed for ruggedized step-down regulation in industrial, transportation, and telecom infrastructure where wide input range and robust protection are mandatory - LM2575HVS-12 delivers this functionality in a thermally optimized surface-mount package.
FAQ
What is the maximum input voltage supported by the LM2575HVS-12?
The LM2575HVS-12 supports a maximum input voltage of 60V DC, as specified in its Absolute Maximum Ratings and Operating Ratings. This distinguishes it from the standard LM2575-N (40V max) and makes it suitable for 48V industrial buses and automotive load-dump tolerant designs. Operation above 60V risks permanent device damage.
Does the LM2575HVS-12 require external feedback resistors to set the 12V output?
No, the LM2575HVS-12 is a fixed-output variant - its internal feedback divider is factory-trimmed to deliver 12V ±4%. Pin 4 (FEEDBACK) is internally connected to the 1.23V reference and requires no external components. External resistors are only needed for adjustable versions like LM2575HV-ADJ.
Can the LM2575HVS-12 be used in a synchronous rectification configuration?
No, the LM2575HVS-12 uses an internal NPN bipolar transistor as the main switch and requires an external Schottky catch diode (e.g., SR103 or MBR340). It does not support synchronous rectification - the output stage is inherently non-synchronous, and no gate drive signals are exposed for an external MOSFET.
What is the recommended minimum output capacitance for stable operation of the LM2575HVS-12?
Texas Instruments recommends 220 μF to 470 μF aluminum electrolytic capacitors for the LM2575HVS-12 output, rated for ≥25V. Lower values may cause instability or excessive ripple; the 330 μF value shown in Figure 25 is validated for 12V output. Low-ESR construction is critical to maintain loop stability and minimize voltage droop under load transients.
How does thermal performance differ between the LM2575HVS-12 and the through-hole LM2575T-12?
The LM2575HVS-12 in TO-263 package achieves θJA = 37°C/W with ≥1 in² PCB copper area, while the LM2575T-12 in TO-220 achieves θJA = 65°C/W with minimal copper. This 43% lower thermal resistance allows the LM2575HVS-12 to sustain 1A continuously at higher ambient temperatures without a heatsink - a key advantage in dense, sealed enclosures.
LM2575HVS-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 60V
- 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:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
LM2575HVS-12 FAQ
1.How can I place an order for LM2575HVS-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVS-12 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 LM2575HVS-12 reliable?
The price and inventory of LM2575HVS-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVS-12 is usually 5 days.
3.What payment methods are accepted for LM2575HVS-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVS-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVS-12?
LM2575HVS-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVS-12 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 LM2575HVS-12?
For technical support, including LM2575HVS-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVS-12 requirements.
6.How does Aetrix verify that LM2575HVS-12 is sourced from the original manufacturer or authorized distributors?
All LM2575HVS-12 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 LM2575HVS-12 meets industry standards.
7.What is the process for return or replacement of LM2575HVS-12?
All LM2575HVS-12 units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVS-12, 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 LM2575HVS-12 part is unused and in its original packaging.
Return procedure for LM2575HVS-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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