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Texas Instruments LM2575HVSX-15
- Part No.:
- LM2575HVSX-15
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2575HVSX-15.pdf
- Description:
- IC REG BUCK 15V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,873
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Product details
Overview
LM2575HVSX-15 from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with fixed 15V output, 60V maximum input voltage rating, 52 kHz fixed-frequency internal oscillator, ±4% output voltage tolerance over line/load/temperature, and integrated thermal shutdown and cycle-by-cycle current limiting. It replaces linear regulators in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2575HVSX-15 datasheet, LM2575HVSX-15 pinout, LM2575HVSX-15 application, or LM2575HVSX-15 equivalent, this page delivers verified technical context, package-specific pin functions, real-world application constraints, and validated alternative options for high-input-voltage DC-DC conversion designs.
Technical Context
The LM2575HVSX-15 implements a fixed-frequency pulse-width modulation (PWM) buck topology with internal NPN switch, feedback comparator, and 1.23V reference. Its 52 kHz oscillator enables use of standard off-the-shelf inductors and reduces EMI compared to higher-frequency alternatives.
It operates across −40°C to +125°C junction temperature, supports TTL-compatible shutdown (ISTBY = 50 μA typical), and delivers regulated 15V output from input voltages up to 60V with 88% peak efficiency at 18VIN/1A. Output saturation voltage is 0.9V typical at 1A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V ±4% over 18V–60V input, 0.2A–1A load, −40°C to +125°C - ensures stable rail for analog/digital subsystems without external feedback resistors. |
| Input Voltage Range | 4.75V to 60V - supports wide-range industrial, automotive, and telecom inputs including unregulated 48V systems. |
| Output Current | 1A continuous - sufficient to power microcontrollers, sensors, and interface ICs without external pass devices. |
| Switching Frequency | 52 kHz fixed - enables use of low-cost, high-saturation-current inductors (e.g., PE-52627) and simplifies EMI filtering. |
| Efficiency | 88% at VIN = 18V, IOUT = 1A - reduces thermal load vs. linear regulators; eliminates need for heatsink in many applications. |
| Thermal Protection | Internal thermal shutdown with automatic recovery - prevents latch-up during overload or poor heatsinking conditions. |
| Quiescent Current | 5 mA operating / 50 μA standby - enables low-power modes when paired with system-level enable control. |
Pinout & Package
LM2575HVSX-15 is supplied in the 5-lead surface-mount DDPAK/TO-263 package (package code KTT0005B), featuring an exposed thermal pad for enhanced heat dissipation (θJA = 37°C/W with 1 in² copper area).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Input | Power input (VIN) | Accepts 4.75V–60V; requires local 100 μF/75V aluminum electrolytic bypass capacitor. |
| 2 - Output | Regulated 15V output (VOUT) | Drives 1A load; connects to catch diode anode and output filter capacitor. |
| 3 - Ground | Power and signal ground (GND) | Common return for input/output capacitors, feedback network, and thermal pad. |
| 4 - Feedback | Feedback sense (FB) | Internally tied to 15V output; not accessible - fixed-output version has no external resistor divider. |
| 5 - ON/OFF | Enable/disable control (TTL-compatible) | Logic-high (>2.2V) enables regulation; logic-low (<0.8V) places device in 50 μA standby mode. |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage input capability | 60V absolute max input enables direct use in 48V battery or PoE-powered systems without pre-regulation. |
| Integrated protection | Thermal shutdown + cycle-by-cycle current limit (1.7–3.2A peak) prevent damage during short-circuit or overload events. |
| Minimal BOM requirement | Only four external components needed: input cap, output cap, catch diode, and inductor - accelerates design and reduces cost. |
| Standard inductor compatibility | Optimized for widely available 330 μH inductors (e.g., Pulse PE-52627) rated for ≥1.15A DC and 52 kHz operation. |
| TTL shutdown interface | 50 μA standby current and 2.2V/0.8V logic thresholds allow direct connection to microcontroller GPIO without level-shifting. |
Applications
| Industrial Power Supplies | Telecom Line Cards |
|---|---|
|
Use Scenario: Converting unregulated 48V backplane voltage to stable 15V for op-amps, ADCs, and sensor interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, efficient, and thermally robust 15V rail with built-in fault protection. Use Value: Eliminates need for bulky linear regulators and external current-limit circuitry while maintaining ±4% output accuracy across temperature. |
Use Scenario: Generating 15V bias for RF front-end amplifiers and clock buffers on carrier-grade line cards with strict thermal budgets. IC Role / Device Role / Timing Role: High-efficiency DC-DC converter delivering clean 15V under dynamic load transients and wide ambient temperature swings. Use Value: 88% efficiency at full load reduces board-level heat density; 52 kHz frequency avoids interference with sensitive RF bands. |
| Test & Measurement Equipment | Automotive Aftermarket Modules |
|
Use Scenario: Powering precision 15V analog signal chains in portable multimeters and oscilloscope front-ends powered by 24V or 36V batteries. IC Role / Device Role / Timing Role: Fixed-output buck regulator supplying low-noise, well-regulated 15V with minimal ripple and fast transient response. Use Value: ±4% output tolerance and 1.23V internal reference ensure measurement accuracy; thermal shutdown prevents field failures during extended operation. |
Use Scenario: Regulating vehicle battery voltage (9V–16V nominal, up to 60V load dump) to 15V for infotainment display backlight drivers and CAN transceivers. IC Role / Device Role / Timing Role: Robust buck controller handling automotive transients and cold-crank conditions without external supervision. Use Value: 60V input rating withstands ISO 7637-2 pulse 5a (load dump); 50 μA standby current preserves battery life in parked state. |
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-15 | TO-220 package; 40V max input; θJA = 65°C/W (no heatsink); same electrical specs. | Suitable for lower-power, through-hole prototyping or legacy board designs with vertical mounting. | Select LM2575T-15 only if TO-220 mechanical fit and lower input voltage (<40V) are acceptable. |
| LM2596S-15 | Higher 63V input rating; 150 kHz switching; adjustable/fixed versions; requires different inductor/capacitor values. | Better suited for space-constrained designs needing higher efficiency at light loads or tighter ripple specs. | Choose LM2596S-15 when 150 kHz operation enables smaller magnetics or when design flexibility justifies re-optimizing external components. |
Compared with LM2575T-15, LM2575HVSX-15 offers superior thermal performance (37°C/W vs. 65°C/W) and 60V input support; versus LM2596S-15, it provides proven 52 kHz stability with legacy inductor compatibility but trades off switching frequency for EMI headroom.
Availability
LM2575HVSX-15 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, test equipment, and automotive aftermarket modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM2575HVSX-15 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 specifically for industrial and automotive applications demanding wide-input-voltage DC-DC conversion with minimal external components and robust fault protection.
FAQ
What is the maximum input voltage rating for LM2575HVSX-15?
The LM2575HVSX-15 supports a maximum input voltage of 60V, as specified in its Absolute Maximum Ratings and Operating Ratings. This high-voltage capability allows direct integration into 48V systems and automotive environments subject to load-dump transients. The device maintains regulation and protection functionality across the full 4.75V–60V input range, with output accuracy guaranteed within ±4% at 15V.
Does LM2575HVSX-15 require external feedback resistors?
No, LM2575HVSX-15 does not require external feedback resistors. As a fixed-output variant, its 15V regulation is implemented internally using a trimmed 1.23V reference and dedicated resistor network. Pin 4 (FB) is not accessible for adjustment - unlike the adjustable LM2575HV-ADJ version - simplifying layout and eliminating resistor tolerance and drift concerns.
What package type is used for LM2575HVSX-15?
LM2575HVSX-15 uses the 5-lead DDPAK/TO-263 surface-mount package (TI package code KTT0005B), featuring an exposed thermal pad. This package delivers θJA = 37°C/W with 1 in² of PCB copper, significantly improving thermal performance over TO-220 alternatives and enabling 1A operation without a heatsink in most industrial environments.
Can LM2575HVSX-15 be used in automotive applications?
Yes, LM2575HVSX-15 is suitable for automotive aftermarket and industrial applications due to its 60V input rating - which exceeds ISO 7637-2 Load Dump Pulse 5a (up to 60V) - and −40°C to +125°C operating junction temperature range. Its integrated thermal shutdown and current limiting provide robust protection against battery reversal, cranking, and short-circuit faults commonly encountered in vehicle systems.
What is the typical efficiency of LM2575HVSX-15 at full load?
LM2575HVSX-15 achieves 88% typical efficiency at VIN = 18V, VOUT = 15V, and IOUT = 1A. This efficiency level is measured under standard test conditions per the TI datasheet (SNVS106E) and reflects the benefit of synchronous-free buck architecture with low RDS(on) NPN switch and optimized gate drive. Efficiency remains above 80% across 12V–48V input range at 1A load.
LM2575HVSX-15 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- 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):
- 15V
- 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)
LM2575HVSX-15 FAQ
1.How can I place an order for LM2575HVSX-15 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVSX-15 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 LM2575HVSX-15 reliable?
The price and inventory of LM2575HVSX-15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVSX-15 is usually 5 days.
3.What payment methods are accepted for LM2575HVSX-15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVSX-15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVSX-15?
LM2575HVSX-15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVSX-15 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 LM2575HVSX-15?
For technical support, including LM2575HVSX-15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVSX-15 requirements.
6.How does Aetrix verify that LM2575HVSX-15 is sourced from the original manufacturer or authorized distributors?
All LM2575HVSX-15 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 LM2575HVSX-15 meets industry standards.
7.What is the process for return or replacement of LM2575HVSX-15?
All LM2575HVSX-15 units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVSX-15, 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 LM2575HVSX-15 part is unused and in its original packaging.
Return procedure for LM2575HVSX-15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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