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Texas Instruments LM2576HVS-15
- Part No.:
- LM2576HVS-15
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2576HVS-15.pdf
- Description:
- IC REG BUCK 15V 3A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,998
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Product details
Overview
LM2576HVS-15 from Texas Instruments is a monolithic 3-A non-synchronous step-down DC-DC regulator in TO-220-5 (KC) package, delivering fixed 15-V output with ±4% regulation over line and load, 40–60 V input range, and 52-kHz fixed-frequency operation. It serves as a high-efficiency replacement for linear regulators in industrial power supplies requiring robust thermal performance and minimal external components.
For engineers reviewing the LM2576HVS-15 datasheet, LM2576HVS-15 pinout, LM2576HVS-15 application, or LM2576HVS-15 equivalent, key selection considerations include its HV-rated 60-V max input, integrated cycle-by-cycle current limiting, thermal shutdown protection, TTL-compatible ON/OFF control, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2576HVS-15 implements a fixed-frequency buck topology with internal 52-kHz oscillator, bandgap reference, error amplifier, and NPN power switch. Its control loop uses voltage-mode feedback via the FEEDBACK pin, with ±4% output tolerance across −40°C to +125°C junction temperature.
It features undervoltage lockout behavior tied to VIN threshold, cycle-by-cycle peak current limiting (typ. 5.8 A), and thermal shutdown activation at ~150°C. Shutdown mode draws only 50 μA standby current when ON/OFF pin is pulled high (>1.4 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15 V ±4% over full line/load/temperature range - ensures stable rail for logic, analog, or motor drive stages without external resistor network. |
| Max Input Voltage | 60 V - supports wide-input industrial, telecom, or automotive-derived supplies without pre-regulation. |
| Output Current | 3 A continuous - sufficient for powering multiple ICs, small motors, or sensor subsystems from single-stage conversion. |
| Oscillator Frequency | 52 kHz (±10%) - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity vs. MHz-range converters. |
| Efficiency | 88% at VIN = 18 V, IOUT = 3 A - minimizes thermal load and eliminates need for heatsink in many medium-power applications. |
| Standby Current | 50 μA typical - enables low-power system-level sleep modes without compromising fast wake-up response. |
| Saturation Voltage | 1.8 V max at 3 A - defines minimum dropout (VIN ≥ VOUT + VSAT ≈ 16.8 V), constraining usable input range at full load. |
Pinout & Package
LM2576HVS-15 is housed in KC (TO-220-5) package with 10.16 mm × 8.51 mm body size and integral heat slug connected to GROUND. The tab must be thermally coupled to PCB copper or external heatsink for reliable 3-A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power input | Connects to high-side transistor collector; requires short, low-inductance path to input capacitor to minimize switching noise and voltage spikes. |
| 2 - OUTPUT | Switching node | Emitter of internal NPN switch; drives external inductor and catch diode cathode - critical for EMI layout and thermal management. |
| 3 - GROUND | Power ground | Reference for internal circuitry and power stage; must tie directly to input/output capacitor grounds with minimal trace length. |
| 4 - FEEDBACK | Voltage sense | Internally referenced to 1.23 V; for fixed 15-V version, this pin connects directly to output capacitor - no divider required. |
| 5 - ON/OFF | Enable control | TTL-compatible digital input: <1.2 V = active, >1.4 V = shutdown; floating state disables device - requires pull-down for default-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated thermal shutdown | Activates at ~150°C junction temperature to prevent permanent damage during overload or poor heatsinking. |
| Cycle-by-cycle current limiting | Limits peak switch current to ~5.8 A, protecting internal transistor and external inductor during short-circuit or startup surge. |
| Fixed 52-kHz oscillator | Eliminates need for external timing components and simplifies EMI compliance testing versus variable-frequency designs. |
| Low quiescent current | 5 mA typical operating IQ enables efficient light-load performance without burst-mode complexity. |
| Standard inductor compatibility | Optimized for widely available 150 µH shielded power inductors - reduces BOM cost and design iteration time. |
Applications
| Industrial Motor Drives | Test & Measurement PSU |
|---|---|
Use Scenario: Powering gate drivers and logic for 24-V DC brushless motor controllers in factory automation systems. IC Role / Device Role / Timing Role: Primary 15-V intermediate rail generator stepping down 48-V bus with high transient immunity and thermal resilience. Use Value: Delivers clean, regulated 15 V at 3 A without heatsink under continuous load - reducing board area and assembly cost vs. linear solutions. | Use Scenario: Generating stable 15-V bias for precision op-amps, ADC references, and signal conditioning circuits in benchtop analyzers. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter providing low-noise, well-regulated supply isolated from noisy AC-DC front-end. Use Value: ±4% output tolerance and 88% efficiency ensure minimal self-heating and drift during extended calibration cycles. |
| Merchant Network PSU | Appliance Control Boards |
Use Scenario: Secondary 15-V rail in 1U server PSUs supporting fan controllers, BMCs, and LED indicators. IC Role / Device Role / Timing Role: High-reliability buck regulator handling wide input transients (e.g., 36–60 V) from redundant DC distribution buses. Use Value: 60-V HV rating and built-in current/thermal protection enable drop-in use without derating in multi-rail architectures. | Use Scenario: Powering microcontroller, display backlight, and relay drivers in smart washing machine control modules. IC Role / Device Role / Timing Role: Main 15-V system rail derived from unregulated 40–55 V battery or rectified mains supply. Use Value: Requires only four external components (input cap, inductor, diode, output cap) - accelerating certification and reducing component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576T-15 | Standard-voltage version (max 40 V input) vs. HV 60 V rating; identical pinout, package, and 15-V output spec. | Suitable only where input never exceeds 40 V - not safe for 48-V telecom or industrial bus applications. | Select LM2576T-15 only if input voltage is strictly limited to ≤40 V and cost sensitivity outweighs safety margin. |
| LM76003QRNLRQ1 | Synchronous 3.5-A buck with 3.5–60 V input, 300 kHz–2.2 MHz programmable frequency, and integrated high-/low-side MOSFETs. | Requires no external diode, offers higher efficiency (>92%), but needs more complex layout and external compensation. | Choose LM76003QRNLRQ1 when efficiency >90%, smaller solution size, or automotive qualification (AEC-Q100) are mandatory. |
Compared with LM2576HVS-15, LM2576T-15 sacrifices input voltage headroom for lower cost, while LM76003QRNLRQ1 trades simplicity and ruggedness for higher integration and efficiency - making LM2576HVS-15 optimal for cost-sensitive, thermally constrained, or legacy-design refreshes needing proven reliability.
Availability
LM2576HVS-15 is available at Aetrix Electronics and suitable for industrial motor drives, test equipment power supplies, merchant network infrastructure, and appliance control boards requiring stable component supply across long production lifecycles.
Supply support for LM2576HVS-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 LM2576 series was designed as a robust, easy-to-use SIMPLE SWITCHER® solution for replacing linear regulators in medium-power industrial and commercial applications - emphasizing fault protection, thermal resilience, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM2576HVS-15?
The LM2576HVS-15 has an absolute maximum input voltage of 63 V and a recommended operating maximum of 60 V. This HV rating distinguishes it from standard LM2576 variants (40 V max) and enables direct use with 48-V industrial buses, telecom supplies, and automotive-derived inputs without pre-regulation. Always observe derating guidelines per ambient temperature and heatsinking.
Does LM2576HVS-15 require an external feedback resistor network?
No, the LM2576HVS-15 is a fixed 15-V output variant - its internal feedback divider is factory-trimmed, and the FEEDBACK pin (Pin 4) must be connected directly to the output capacitor. External resistors are only required for the adjustable (ADJ) version. Incorrect connection of feedback components on LM2576HVS-15 will disrupt regulation.
How does the ON/OFF pin function on LM2576HVS-15?
The ON/OFF pin (Pin 5) provides TTL-compatible enable control: logic-low (<1.2 V) enables regulation, while logic-high (>1.4 V) places LM2576HVS-15 in shutdown mode drawing only 50 μA. The pin must never be left floating - a 10-kΩ pull-down resistor ensures default-on operation. This feature supports system-level power sequencing and low-power standby states.
What thermal performance can be expected from LM2576HVS-15 in TO-220 package?
In the KC (TO-220-5) package, LM2576HVS-15 has a junction-to-ambient thermal resistance (RθJA) of 32.4°C/W with proper PCB copper and optional heatsink. At 3-A load and 18-V input, dissipation is ~5.4 W - resulting in ~175°C rise above ambient without heatsinking. A modest heatsink or ≥2 in² copper pour reduces junction temperature to safe levels (<125°C) for continuous operation.
Can LM2576HVS-15 be used in synchronous rectification configurations?
No, LM2576HVS-15 is a non-synchronous buck controller with an internal NPN switch and requires an external catch diode (e.g., 1N5822). It does not support synchronous rectification - no gate-drive outputs or timing signals for an external low-side MOSFET are provided. For synchronous operation, consider alternatives like LM76003 or LMR51430.
LM2576HVS-15 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):
- 15V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- 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)
LM2576HVS-15 FAQ
1.How can I place an order for LM2576HVS-15 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2576HVS-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 LM2576HVS-15 reliable?
The price and inventory of LM2576HVS-15 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2576HVS-15 is usually 5 days.
3.What payment methods are accepted for LM2576HVS-15?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2576HVS-15 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2576HVS-15?
LM2576HVS-15 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2576HVS-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 LM2576HVS-15?
For technical support, including LM2576HVS-15 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2576HVS-15 requirements.
6.How does Aetrix verify that LM2576HVS-15 is sourced from the original manufacturer or authorized distributors?
All LM2576HVS-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 LM2576HVS-15 meets industry standards.
7.What is the process for return or replacement of LM2576HVS-15?
All LM2576HVS-15 units undergo pre-shipment inspection (PSI). If there is an issue with LM2576HVS-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 LM2576HVS-15 part is unused and in its original packaging.
Return procedure for LM2576HVS-15:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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