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Texas Instruments LM2575HVS-15/NOPB
- Part No.:
- LM2575HVS-15/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2575HVS-15/NOPB.pdf
- Description:
- IC REG BUCK 15V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:247
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Product details
Overview
LM2575HVS-15/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with fixed 15V output, 60V maximum input voltage, 52 kHz fixed-frequency internal oscillator, thermal shutdown and current limiting, and TTL-compatible shutdown control. It delivers stable 15V power for industrial power supplies requiring high-input-voltage DC-DC conversion.
For engineers reviewing the LM2575HVS-15/NOPB datasheet, LM2575HVS-15/NOPB pinout, LM2575HVS-15/NOPB application, or LM2575HVS-15/NOPB equivalent, key selection criteria include input voltage range up to 60V, ±4% output voltage tolerance at 15V, 1A continuous output current capability, TO-263 (DDPAK) surface-mount package thermal performance, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2575HVS-15/NOPB integrates a PWM controller, power switch, oscillator, error amplifier, and protection circuitry into a single IC. Its fixed-frequency 52 kHz operation enables predictable EMI filtering and simplifies inductor selection using standardized parts.
It operates in continuous conduction mode with cycle-by-cycle current limiting and thermal shutdown. The feedback loop uses an internal 1.23V reference and requires no external compensation, supporting stable regulation across 18V–60V input and 0.2A–1A load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V ±4% over 18V–60V input and 0.2A–1A load - ensures stable rail for downstream logic or analog circuitry without adjustment. |
| Max Input Voltage | 60V - supports wide-range industrial, automotive, or telecom inputs without external pre-regulation. |
| Output Current | 1A continuous - sufficient to power multiple ICs or small subsystems directly. |
| Oscillator Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors and reduces EMI filter complexity. |
| Efficiency | 88% at VIN = 18V, IOUT = 1A - minimizes power loss and thermal stress in compact layouts. |
| Shutdown Current | 50 μA typical - enables low-power standby modes in battery-backed or energy-conscious systems. |
| Junction-to-Ambient θJA | 37°C/W with ≥1 in² PCB copper - defines thermal design margin for surface-mount board-level cooling without heatsink. |
Pinout & Package
LM2575HVS-15/NOPB is housed in a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), featuring exposed thermal pad for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Input | Unregulated DC input supply | Accepts 18V–60V; must be bypassed with ≥47 μF aluminum electrolytic capacitor near pin. |
| 2 - Output | Regulated 15V switching node | Drives external catch diode and LC filter; high di/dt requires short, low-inductance routing. |
| 3 - Ground | Power and signal reference | Must connect directly to thermal pad and low-impedance ground plane to ensure stability and thermal performance. |
| 4 - Feedback | Output voltage sense (not used in fixed-output versions) | Internally connected to 15V divider; left unconnected - not accessible externally on LM2575HVS-15/NOPB. |
| 5 - ON/OFF | TTL-compatible enable/disable control | 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 power switch | Internal NPN transistor with 1.4V saturation voltage at 1A - eliminates external MOSFET and gate driver. |
| Fixed-frequency oscillator | 52 kHz internal clock - avoids external timing components and ensures consistent ripple frequency for EMI compliance. |
| Thermal shutdown + current limit | Automatic foldback under overload or overtemperature - protects IC and system without external circuitry. |
| TTL shutdown interface | 50 μA standby current with logic-level control - enables microcontroller-based power sequencing and sleep management. |
| Standard inductor compatibility | Optimized for off-the-shelf 330 μH inductors (e.g., Pulse PE-52627) - accelerates design and reduces BOM cost. |
Applications
| Industrial Power Supply | Telecom Line Card |
|---|---|
Use Scenario: Converting 48V telecom distribution bus to 15V intermediate rail for analog front-end circuitry. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 15V output with built-in fault protection. Use Value: Eliminates need for external current sensing or thermal monitoring while maintaining ±4% output accuracy across temperature and line variation. |
Use Scenario: Generating 15V bias for op-amps and ADC drivers on high-density line cards with strict thermal constraints. IC Role / Device Role / Timing Role: Surface-mount DC-DC converter leveraging TO-263 thermal pad for conduction cooling. Use Value: Achieves 88% efficiency at full load with 37°C/W θJA, enabling operation without heatsink in confined card slots. |
| Test Equipment Power Module | Motor Drive Auxiliary Supply |
Use Scenario: Providing clean, stable 15V for precision DACs and reference buffers in automated test systems. IC Role / Device Role / Timing Role: Fixed-output buck regulator with low output ripple (<1% typical) and fast transient response. Use Value: Delivers ±4% output tolerance and <50 μA shutdown current, supporting both active measurement and low-power standby modes. |
Use Scenario: Deriving 15V gate drive or logic supply from 60V DC bus in BLDC motor controllers. IC Role / Device Role / Timing Role: High-input-voltage buck stage powering isolated gate drivers and MCU peripherals. Use Value: Withstands 60V max input and includes cycle-by-cycle current limiting - prevents latch-up during motor stall or short-circuit events. |
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 through-hole package; higher θJA (65°C/W); same electrical specs. | Requires heatsink above ~0.5A in free-air; less suitable for dense SMT layouts. | Select when manual assembly, prototyping, or legacy through-hole compatibility is required. |
| LM2596S-15 | Higher 3A output current; 150 kHz switching; different pinout and external compensation. | Enables smaller magnetics but demands careful loop compensation and layout for stability. | Select when >1A load or tighter size constraints justify redesign effort and validation. |
Compared with LM2575T-15, LM2575HVS-15/NOPB offers superior thermal performance in SMT form; compared with LM2596S-15, it trades higher current and frequency for simpler design, proven reliability, and drop-in compatibility with existing LM2575 layouts.
Availability
LM2575HVS-15/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, test equipment modules, and motor drive auxiliary supplies requiring stable component supply and long-term manufacturability.
Supply support for LM2575HVS-15/NOPB 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 robust, cost-effective DC-DC conversion in harsh environments-targeting industrial, telecom, and instrumentation applications where wide input range and integrated protection are critical.
FAQ
What is the maximum input voltage rating for LM2575HVS-15/NOPB?
The LM2575HVS-15/NOPB has a maximum input voltage rating of 60V, as specified in its Absolute Maximum Ratings table. This HV variant extends beyond the standard LM2575's 40V limit, making it suitable for 48V telecom, industrial 24/48V systems, and automotive applications with load-dump transients. Operation above 60V risks permanent damage.
Does LM2575HVS-15/NOPB require external compensation components?
No, LM2575HVS-15/NOPB does not require external compensation components. It features internal frequency compensation optimized for stable operation with standard external components: a 330 μH inductor, Schottky catch diode, and aluminum electrolytic input/output capacitors. This simplifies design and reduces BOM count versus adjustable or higher-frequency regulators.
What is the thermal resistance (θJA) of LM2575HVS-15/NOPB in typical PCB layout?
The LM2575HVS-15/NOPB has a junction-to-ambient thermal resistance (θJA) of 37°C/W when mounted on a PCB with ≥1 square inch of copper area thermally connected to its exposed DDPAK pad. This value assumes standard FR-4 board material and no external heatsink - enabling 1A continuous operation without forced air or heatsink in well-designed layouts.
Can LM2575HVS-15/NOPB be used in adjustable-output configurations?
No, LM2575HVS-15/NOPB is a fixed-output variant with internal 15V feedback divider. Its Feedback (pin 4) is not accessible externally and is permanently tied to the internal resistor network. For adjustable output, use LM2575HVS-ADJ/NOPB instead, which provides access to the 1.23V reference and external resistor programming.
What type of catch diode is recommended for LM2575HVS-15/NOPB?
A Schottky diode rated for ≥1.2× the maximum load current (≥1.2A) and ≥1.25× the maximum input voltage (≥75V) is recommended for LM2575HVS-15/NOPB. Common selections include MBR340 (40V, 3A) for lower-input designs or SR5100 (100V, 5A) for full 60V operation. Fast recovery diodes like UF5408 may be used if Schottky voltage drop is not critical.
LM2575HVS-15/NOPB 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:
- Active
- 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)
LM2575HVS-15/NOPB FAQ
1.How can I place an order for LM2575HVS-15/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVS-15/NOPB 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-15/NOPB reliable?
The price and inventory of LM2575HVS-15/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVS-15/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVS-15/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVS-15/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVS-15/NOPB?
LM2575HVS-15/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVS-15/NOPB 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-15/NOPB?
For technical support, including LM2575HVS-15/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVS-15/NOPB requirements.
6.How does Aetrix verify that LM2575HVS-15/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVS-15/NOPB 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-15/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVS-15/NOPB?
All LM2575HVS-15/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVS-15/NOPB, 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-15/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVS-15/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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