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Texas Instruments LM2575HVT-5.0/LB03
- Part No.:
- LM2575HVT-5.0/LB03
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2575HVT-5.0/LB03.pdf
- Description:
- IC REG BUCK 5V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,928
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Product details
Overview
LM2575HVT-5.0/LB03 from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in a 5-lead TO-220 package, delivering a fixed 5.0V ±4% output across 8V–60V input range, with 52 kHz fixed-frequency operation and integrated thermal shutdown, cycle-by-cycle current limiting, and TTL-compatible shutdown control. It replaces linear regulators in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2575HVT-5.0/LB03 datasheet, LM2575HVT-5.0/LB03 pinout, LM2575HVT-5.0/LB03 application, or LM2575HVT-5.0/LB03 equivalent, this device is selected for high-input-voltage DC-DC conversion where input transients exceed 40V, board space is constrained, and thermal management must avoid external heatsinks under 1A continuous load.
Technical Context
The LM2575HVT-5.0/LB03 implements a fixed-frequency PWM buck topology with internal 52 kHz oscillator, N-channel DMOS output switch, and built-in error amplifier referenced to 1.23V feedback threshold. Its high-voltage rating (60V max input) enables direct use in 48V telecom, automotive battery-supplied, and industrial 24/36V systems without pre-regulation.
It features cycle-by-cycle current limiting (1.7–3.2A peak), thermal shutdown at ~150°C junction temperature, and 50 μA standby current when the ON/OFF pin is pulled high. The TO-220 package provides θJA = 45°C/W with 4 in² copper area, supporting 1A continuous output without forced air cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over 0.2–1A load and 8–60V input - ensures stable logic rail generation without trimming resistors. |
| Input Voltage Range | 8V to 60V - supports wide-range unregulated inputs including 48V telecom, 36V industrial, and automotive cold-crank (up to 60V transient). |
| Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and interface ICs without derating in ambient ≤50°C. |
| Switching Frequency | 52 kHz fixed - enables use of low-cost, standard 330 μH inductors and simplifies EMI filtering versus higher-frequency alternatives. |
| Efficiency | 77% at VIN=12V, IOUT=1A - reduces thermal load by >50% vs. linear regulators, eliminating need for heatsink in many applications. |
| Shutdown Current | 50 μA typical - enables ultra-low-power sleep modes in battery-backed or energy-harvesting systems. |
| Thermal Protection | Internal thermal shutdown at ~150°C junction - prevents catastrophic failure during overload or poor PCB layout. |
Pinout & Package
LM2575HVT-5.0/LB03 uses a 5-lead TO-220 package (Package Number NDH0005D), with the tab electrically connected to Pin 2 (Output) and thermally coupled to the PCB copper pour for heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 8–60V unregulated DC; requires ≥100 μF/75V input capacitor placed within 1 cm for stability. |
| 2 (OUT) | Regulated output & power switch drain | Delivers 5.0V/1A; connects directly to inductor and output capacitor; tab is bonded to this pin for thermal conduction. |
| 3 (GND) | Power and signal ground reference | Common return for input/output capacitors, feedback network, and ON/OFF control; must be single-point grounded near IC. |
| 4 (FEEDBACK) | Output voltage sense (not used in fixed 5V version) | Internally tied to 5V output; left unconnected - no external resistor divider required for this variant. |
| 5 (ON/OFF) | TTL-compatible enable/disable control | Pull ≥2.2V to enable regulation; pull ≤0.8V to enter 50 μA standby mode - supports remote power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| High-voltage input capability | 60V absolute maximum input enables direct integration into 48V systems without front-end buck pre-regulator. |
| Integrated protection | Combines cycle-by-cycle current limiting, thermal shutdown, and safe operating area (SOA) design to survive short-circuit and overload events. |
| Minimal external parts | Requires only four components: input cap, output cap, inductor, and catch diode - reduces BOM cost and layout complexity. |
| Standard inductor compatibility | Optimized for off-the-shelf 330 μH inductors (e.g., Pulse PE-52627), avoiding custom magnetics and accelerating design cycle. |
| TTL shutdown interface | 50 μA standby current and logic-level compatible ON/OFF pin simplify integration with microcontroller GPIOs or system supervisors. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converts 24V vehicle battery or 48V industrial bus to clean 5V for MCU, CAN transceivers, and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated 5V rail with transient immunity up to 60V. Use Value: Eliminates need for discrete MOSFET + controller solution, reducing component count and improving reliability in harsh environments. |
Use Scenario: Powers infotainment head-unit logic circuits from variable automotive battery (9–16V nominal, up to 60V during load dump). IC Role / Device Role / Timing Role: High-input-voltage step-down regulator with fast transient response to handle engine cranking dips and alternator surges. Use Value: Maintains regulated 5V output during 60V transients without external clamping, simplifying front-end protection design. |
| Telecom Remote Radio Unit | Energy Meter Auxiliary Supply |
|
Use Scenario: Derives 5V from -48V telecom supply using buck-boost configuration (with external inverting topology). IC Role / Device Role / Timing Role: Core switching regulator reconfigured as positive-to-negative converter for isolated auxiliary rails. Use Value: Leverages existing 52 kHz oscillator and current-limit architecture to generate negative bias without adding controller IC. |
Use Scenario: Supplies 5V to metrology ASIC and RTC in smart electricity meters powered from 230VAC via bridge rectifier and bulk cap. IC Role / Device Role / Timing Role: Pre-regulator stepping down rectified 325VDC peak to 5V, preceding low-noise LDO for precision analog circuitry. Use Value: Handles wide input range (8–60V after initial dropper) while maintaining ±4% output accuracy critical for meter calibration integrity. |
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-5.0 | 40V max input (vs. 60V); identical pinout, package, and 5V output spec. | Not suitable for 48V systems or automotive load-dump conditions exceeding 45V. | Select LM2575HVT-5.0/LB03 when input may reach 60V; choose LM2575T-5.0 only for ≤40V nominal inputs. |
| LM2596S-5.0 | Higher 3A output current, 150 kHz switching frequency, SO-8 package - requires different inductor and layout. | Better suited for compact designs needing >1A or lower output ripple; not drop-in compatible due to pinout and frequency mismatch. | Use LM2596S-5.0 only when upgrading current capability or footprint; LM2575HVT-5.0/LB03 remains optimal for legacy TO-220 layouts and 60V tolerance. |
Compared with LM2575T-5.0, LM2575HVT-5.0/LB03 adds 20V input headroom critical for automotive and telecom; compared with LM2596S-5.0, it trades higher current for proven ruggedness, simpler magnetics, and TO-220 thermal performance in high-ambient environments.
Availability
LM2575HVT-5.0/LB03 is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, telecom remote radio units, and energy meter auxiliary supplies requiring stable component supply across extended product lifecycles.
Supply support for LM2575HVT-5.0/LB03 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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM2575HV product line was designed specifically for high-input-voltage industrial, automotive, and telecom applications where robustness, simplicity, and long-term availability outweigh the need for ultra-high efficiency or miniaturization.
FAQ
What is the maximum input voltage rating for LM2575HVT-5.0/LB03?
The LM2575HVT-5.0/LB03 has an absolute maximum input voltage of 63V and is specified for continuous operation up to 60V. This distinguishes it from the standard LM2575 series (40V max), making it suitable for 48V systems and automotive load-dump conditions. Operation beyond 60V risks permanent damage, even momentarily.
Does LM2575HVT-5.0/LB03 require external feedback resistors to set the 5V output?
No. The LM2575HVT-5.0/LB03 is a fixed-output variant - its internal feedback divider is factory-trimmed to deliver 5.0V ±4%. Pin 4 (FEEDBACK) is internally connected to the output and must remain unconnected; adding external resistors will disrupt regulation and is not supported.
Can LM2575HVT-5.0/LB03 be used in a buck-boost configuration?
Yes - the LM2575HVT-5.0/LB03 can be configured as a buck-boost (inverting) regulator per TI Application Note SLVA017. In that topology, it generates a negative output from a positive input, leveraging the same 52 kHz oscillator and current-limit protection. Layout and component selection differ significantly from buck mode.
What thermal performance can be expected from LM2575HVT-5.0/LB03 in a TO-220 package?
With 4 in² of 2-oz copper on the PCB connected to the tab (Pin 2), the LM2575HVT-5.0/LB03 achieves θJA = 45°C/W. At 1A output and 12V input, power dissipation is ~1.8W; junction temperature rise is ~81°C above ambient - well within the 125°C max operating limit if ambient stays below 44°C.
Is LM2575HVT-5.0/LB03 RoHS compliant and lead-free?
Yes - LM2575HVT-5.0/LB03 is manufactured in accordance with TI's current RoHS-compliant and lead-free standards. The "LB03" suffix denotes the flow code for lead-free, halogen-free packaging per TI specification, and the device meets JEDEC J-STD-020 moisture sensitivity level 3.
LM2575HVT-5.0/LB03 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5 Formed Leads
- 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- 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
LM2575HVT-5.0/LB03 FAQ
1.How can I place an order for LM2575HVT-5.0/LB03 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVT-5.0/LB03 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 LM2575HVT-5.0/LB03 reliable?
The price and inventory of LM2575HVT-5.0/LB03 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVT-5.0/LB03 is usually 5 days.
3.What payment methods are accepted for LM2575HVT-5.0/LB03?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVT-5.0/LB03 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVT-5.0/LB03?
LM2575HVT-5.0/LB03 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVT-5.0/LB03 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 LM2575HVT-5.0/LB03?
For technical support, including LM2575HVT-5.0/LB03 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVT-5.0/LB03 requirements.
6.How does Aetrix verify that LM2575HVT-5.0/LB03 is sourced from the original manufacturer or authorized distributors?
All LM2575HVT-5.0/LB03 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 LM2575HVT-5.0/LB03 meets industry standards.
7.What is the process for return or replacement of LM2575HVT-5.0/LB03?
All LM2575HVT-5.0/LB03 units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVT-5.0/LB03, 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 LM2575HVT-5.0/LB03 part is unused and in its original packaging.
Return procedure for LM2575HVT-5.0/LB03:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2575HVT-5.0/LB03 Tags
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