My Inquiry
My Account
Texas Instruments LM2576HVT-12
_4040208^C.jpg)
- Part No.:
- LM2576HVT-12
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5
- Datasheet:
-
LM2576HVT-12.pdf
- Description:
- IC REG BUCK 12V 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,792
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2576HVT-12 from Texas Instruments is a monolithic 3-A non-synchronous step-down DC-DC regulator in TO-220 (KC) package, delivering fixed 12 V output with ±4% tolerance over line and load, supporting 40–60 V input range, and operating at 52 kHz fixed frequency for motor drives and industrial power supplies.
For engineers reviewing the LM2576HVT-12 datasheet, LM2576HVT-12 pinout, LM2576HVT-12 application, or LM2576HVT-12 equivalent, key selection considerations include HV input rating (60 V max), thermal performance (RθJA = 32.4°C/W in KC), shutdown current (50 µA typ), cycle-by-cycle current limiting (4.2–6.9 A), and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2576HVT-12 integrates a high-side NPN switch, fixed-frequency oscillator (47–58 kHz), error amplifier, bandgap reference (1.23 V), and thermal shutdown circuitry. It operates in continuous conduction mode under full load and transitions to discontinuous mode at light loads without instability.
Its control architecture uses voltage-mode PWM with internal current limiting and undervoltage lockout. The ON/OFF pin enables TTL-compatible shutdown with 1.2 V logic-low threshold and 1.4 V logic-high threshold, supporting delayed start-up and system-level sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over full temperature and load range - ensures stable rail for microcontrollers and analog circuitry without external feedback resistors. |
| Input Voltage Range | 40 V to 60 V - supports wide-input industrial and automotive battery-supplied systems where transient spikes exceed 40 V. |
| Output Current | 3 A DC continuous - sufficient to power multiple downstream ICs or small motors without external current boosting. |
| Oscillator Frequency | 52 kHz typical (47–58 kHz) - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity vs. MHz-range converters. |
| Standby Current | 50 µA typical - allows low-power system sleep modes without compromising fast wake-up response. |
| Saturation Voltage | 1.8 V max at 3 A - defines minimum dropout voltage (VIN(min) ≈ VOUT + VCE(sat)) and impacts thermal dissipation in high-VIN/low-VOUT applications. |
| Current Limit | 4.2–6.9 A - provides robust short-circuit protection while allowing safe inrush during cold start without false triggering. |
Pinout & Package
LM2576HVT-12 is supplied in KC (TO-220, 5-pin) package with integrated heat slug connected to GROUND; body size 10.16 mm × 8.51 mm; requires heatsink mounting for >1.5 A continuous operation at ambient >50°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | High-side switch collector input | Connects directly to unregulated DC input; must be decoupled with low-ESR capacitor placed <5 mm from pin to minimize switching noise injection. |
| 2 - OUTPUT | Switch emitter output node | Drives external inductor and catch diode anode; high dv/dt node requiring tight layout and ground plane isolation to reduce EMI. |
| 3 - GROUND | Power and signal reference | Low-impedance return path for input capacitor, feedback divider, and heatsink; must be tied to thermal pad and PCB ground plane with multiple vias. |
| 4 - FEEDBACK | Regulation error sense input | Internally referenced to 1.23 V; for fixed 12 V version, this pin is internally connected to output - no external divider required. |
| 5 - ON/OFF | TTL-compatible enable control | Logic-low (<1.2 V) enables regulation; logic-high (>1.4 V) disables switch and reduces quiescent current to 50 µA - used for system power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12 V output | Eliminates external feedback resistor network, reducing BOM count and layout sensitivity while ensuring ±4% accuracy across −40°C to +125°C. |
| 60 V maximum input | Enables direct connection to 48 V industrial buses or automotive systems with load-dump transients up to 60 V without external clamping. |
| Cycle-by-cycle current limit | Prevents inductor saturation and MOSFET failure during output shorts by limiting peak switch current to 4.2–6.9 A independent of duty cycle. |
| Thermal shutdown | Activates at 150°C junction temperature and latches off until cooldown - protects against sustained overload or inadequate heatsinking. |
| 52 kHz fixed-frequency operation | Allows predictable EMI filtering design and compatibility with low-cost, high-current toroidal inductors optimized for 50 kHz range. |
Applications
| Industrial Motor Control | Server PSU Auxiliary Rail |
|---|---|
Use Scenario: Powering gate drivers and logic circuits for 24–48 V brushed DC motors in PLC-controlled factory equipment. IC Role / Device Role / Timing Role: Primary 12 V buck regulator supplying isolated I/O modules and encoder interfaces. Use Value: 60 V input rating withstands motor back-EMF spikes; 3 A output supports multiple driver ICs; thermal shutdown prevents field failures during jam conditions. |
Use Scenario: Generating stable 12 V auxiliary supply for fan controllers, SMBus interfaces, and LED indicators in merchant server PSUs. IC Role / Device Role / Timing Role: Secondary regulated rail derived from main 48 V bus, synchronized via fixed 52 kHz clock for predictable noise spectrum. Use Value: Low standby current (50 µA) extends system sleep time; TO-220 package simplifies heatsink integration into dense PSU layouts. |
| Appliance Main Power | Test Equipment Bias Supply |
Use Scenario: Converting rectified AC line (≈320 V DC after bridge) down to 12 V for MCU, display, and sensor subsystems in smart washing machines. IC Role / Device Role / Timing Role: Isolated offline secondary-side regulator following flyback transformer, providing clean 12 V for digital control core. Use Value: High efficiency (88% at 15 VIN/3 A) reduces thermal load in sealed enclosures; ±4% output tolerance ensures reliable ADC reference stability. |
Use Scenario: Delivering precise 12 V bias to op-amps, relays, and calibration DACs in portable multimeters and benchtop power analyzers. IC Role / Device Role / Timing Role: Low-noise local regulator decoupled from noisy main supply, minimizing measurement drift and offset errors. Use Value: Fixed-output architecture eliminates resistor tolerance drift; 52 kHz switching allows compact LC filter (20 µH + 2000 µF) achieving <5 mVpp ripple. |
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-12 | Max input voltage 40 V (vs. 60 V); identical pinout, package, and electrical specs otherwise. | Not suitable for 48 V bus systems with transients >40 V; acceptable for 24 V industrial or 12 V automotive applications. | Select LM2576T-12 only when input never exceeds 40 V - avoids over-spec'ing HV variant and reduces cost. |
| LM2596T-12 | Higher switching frequency (150 kHz), lower quiescent current (5 mA active), but lower max output current (3 A vs. 3 A same, yet derated above 85°C). | Better suited for space-constrained designs needing smaller inductors; less thermally robust at full load in sealed enclosures. | Choose LM2596T-12 when board area is critical and ambient temperature stays below 70°C; LM2576HVT-12 preferred for high-temp reliability. |
Compared with LM2576T-12, the LM2576HVT-12 adds 20 V headroom for transient immunity without changing layout or thermal design; versus LM2596T-12, it trades higher EMI filter size for superior thermal margin and proven ruggedness in industrial environments.
Availability
LM2576HVT-12 is available at Aetrix Electronics and suitable for industrial motor control, server auxiliary power, appliance main rails, and test equipment bias supplies requiring stable component supply across multi-year production cycles.
Supply support for LM2576HVT-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 and embedded processing technologies, with decades of expertise in power management ICs for industrial, automotive, and computing markets.
The LM2576 series was designed as a robust, easy-to-use replacement for linear regulators in medium-power DC-DC conversion, emphasizing fault protection, minimal external components, and compatibility with standard magnetics.
FAQ
What is the maximum input voltage rating for LM2576HVT-12?
The LM2576HVT-12 has a maximum input voltage rating of 60 V, verified per Absolute Maximum Ratings (Section 6.1). This HV rating distinguishes it from the standard LM2576T-12 (40 V max) and enables use in 48 V systems with load-dump transients. Operation beyond 60 V risks permanent damage; always include input clamping if transients may exceed this limit.
Does LM2576HVT-12 require external feedback resistors?
No, the LM2576HVT-12 is a fixed-output variant with internal feedback divider set for 12 V. Pin 4 (FEEDBACK) is internally connected to the output, eliminating external resistors. This simplifies layout, improves accuracy (±4% over temp/load), and removes resistor tolerance and drift as error sources - confirmed in Section 6.7 and Figure 5-1 of the datasheet.
How does the ON/OFF pin function on LM2576HVT-12?
The ON/OFF pin (Pin 5) provides TTL-compatible enable control: logic-low (<1.2 V) enables regulation; logic-high (>1.4 V) places LM2576HVT-12 in shutdown with 50 µA typical standby current. It is not open-drain - must be actively driven or pulled to GND/VIN. Leaving it floating causes undefined behavior and is prohibited per Section 5 and 7.4.1.
What thermal performance can be expected from LM2576HVT-12 in TO-220 package?
In KC (TO-220) package, LM2576HVT-12 has RθJA = 32.4°C/W (Section 6.4). At 3 A output with 48 V input and 12 V output, power dissipation is ~10.8 W - resulting in ~350°C rise above ambient without heatsink. A 10°C/W heatsink reduces junction rise to ~140°C, staying within 150°C max. Thermal shutdown activates if TJ exceeds 150°C.
Is LM2576HVT-12 RoHS compliant and lead-free?
Yes, LM2576HVT-12 is RoHS compliant and lead-free, as confirmed in TI's official packaging and ordering information (Section 10, SNVS107G). The KC package uses matte tin lead finish, and the device meets JEDEC J-STD-020 moisture sensitivity level 3. Full compliance documentation is available in TI's Quality & Environmental section for this part number.
LM2576HVT-12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-220-5
- 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:
- 3A
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LM2576HVT-12 FAQ
1.How can I place an order for LM2576HVT-12 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2576HVT-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 LM2576HVT-12 reliable?
The price and inventory of LM2576HVT-12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2576HVT-12 is usually 5 days.
3.What payment methods are accepted for LM2576HVT-12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2576HVT-12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2576HVT-12?
LM2576HVT-12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2576HVT-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 LM2576HVT-12?
For technical support, including LM2576HVT-12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2576HVT-12 requirements.
6.How does Aetrix verify that LM2576HVT-12 is sourced from the original manufacturer or authorized distributors?
All LM2576HVT-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 LM2576HVT-12 meets industry standards.
7.What is the process for return or replacement of LM2576HVT-12?
All LM2576HVT-12 units undergo pre-shipment inspection (PSI). If there is an issue with LM2576HVT-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 LM2576HVT-12 part is unused and in its original packaging.
Return procedure for LM2576HVT-12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2576HVT-12 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
