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Texas Instruments LM2596T-5.0/NOPB
- Part No.:
- LM2596T-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2596T-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:114
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Product details
Overview
LM2596T-5.0/NOPB from Texas Instruments is a monolithic 150-kHz nonsynchronous buck DC-DC converter delivering up to 3 A at fixed 5-V output, with input voltage range up to 40 V, ±4% output voltage tolerance, and thermal/current-limit protection. It serves as the primary step-down regulator in industrial power supplies and embedded system rails.
For engineers reviewing the LM2596T-5.0/NOPB datasheet, LM2596T-5.0/NOPB pinout, LM2596T-5.0/NOPB application, or LM2596T-5.0/NOPB equivalent, key selection criteria include its 3-A load capability, TO-220-5 package thermal performance, TTL-compatible ON/OFF control, and fixed 5-V output without external feedback resistors.
Technical Context
The LM2596T-5.0/NOPB integrates a PWM controller, power switch, and internal frequency compensation operating at a fixed 150-kHz switching frequency. Its architecture uses external diode, inductor, and capacitors to form a complete buck topology with discontinuous or continuous conduction mode support.
It features undervoltage lockout, thermal shutdown, and two-stage current limiting-peak limit at 3.6–6.9 A and foldback reduction under overload. The ON/OFF pin enables logic-level shutdown with 80 μA standby current and 1.3-V threshold voltage referenced to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over line/load/temperature (–40°C to 125°C) |
| Max Output Current | 3 A DC continuous load capability with thermal derating above 25°C ambient |
| Input Voltage Range | 4.5 V to 40 V DC - supports wide-input industrial and automotive battery-fed systems |
| Switching Frequency | 150 kHz ±15% - enables use of standard off-the-shelf 100–220 μH inductors |
| Efficiency | 80% typical at VIN = 12 V, IOUT = 3 A - reduces heat sink requirements in compact enclosures |
| Quiescent Current | 80 μA in shutdown (ON/OFF pin >1.3 V), 5–10 mA in active operation |
| Protection Features | Thermal shutdown, peak current limit (3.6–7.5 A), and safe SOA for short-circuit conditions |
Pinout & Package
LM2596T-5.0/NOPB is supplied in a 5-pin TO-220 (NDH) package with tab connected to Pin 3 (Ground), enabling direct heatsink mounting. Body size is 14.986 mm × 10.16 mm, and the tab provides low thermal resistance (RθJC = 2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 4.5–40 V DC; requires local 100-μF electrolytic + 0.1-μF ceramic bypass capacitor |
| 2 - OUTPUT | Internal switch node | Drives external catch diode and inductor; high dv/dt node requiring minimal PCB copper area |
| 3 - GROUND | Circuit reference and thermal path | Common return for input/output capacitors and heatsink interface; connects to metal tab |
| 4 - FEEDBACK | Regulation sense input | Internally tied to 5-V divider; not accessible - fixed-output version has no external feedback connection |
| 5 - ON/OFF | Logic-enable control | TTL-compatible shutdown: <1.3 V = ON, >1.3 V = OFF; pulls to ground for always-on operation |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5-V output | Eliminates external resistor divider, reducing BOM count and layout sensitivity in cost-sensitive designs |
| 150-kHz fixed-frequency operation | Enables predictable EMI filtering and compatibility with low-cost, high-saturation-current inductors |
| TTL shutdown with 80-μA standby | Supports low-power sleep modes in battery-backed or energy-conscious systems without auxiliary circuitry |
| Integrated thermal and current protection | Prevents catastrophic failure during overload or poor heatsinking - no external sensing components required |
| TO-220-5 package with grounded tab | Provides mechanical robustness and direct thermal path to heatsink - simplifies thermal design vs. SMT alternatives |
Applications
| Industrial Power Supplies | Embedded System Rails |
|---|---|
Use Scenario: Converting 24-V DC bus to stable 5-V rail for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary non-isolated step-down regulator providing regulated 5-V power to microcontrollers and digital logic. Use Value: Delivers 3-A continuous current with <±4% regulation across –40°C to 85°C ambient, meeting industrial temperature requirements without derating. |
Use Scenario: Generating 5-V supply for ARM-based edge computing gateways with fanless enclosure constraints. IC Role / Device Role / Timing Role: High-efficiency buck converter powering SoC core and peripheral domains from wide-input 12–36-V source. Use Value: 80% efficiency at full load minimizes internal temperature rise; TO-220 tab allows direct heatsink attachment within tight board space. |
| Appliance Control Boards | Home Theater Power Stages |
Use Scenario: Providing clean 5-V rail for MCU, display drivers, and communication ICs in smart refrigerator control boards. IC Role / Device Role / Timing Role: Main system regulator handling transient loads from relay actuation and display backlight switching. Use Value: Built-in current limiting and thermal shutdown prevent latch-up during motor startup surges or capacitor inrush events. |
Use Scenario: Supplying 5-V bias for HDMI port controllers, audio DACs, and IR receivers in AV receivers and soundbars. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from noisy main 12-V supply using simple buck topology. Use Value: Fixed 5-V output eliminates feedback tuning; 150-kHz switching avoids audible noise while enabling compact LC filter design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596SX-5.0/NOPB | Same electrical specs but in TO-263-5 (KTT) surface-mount package; RθJA = 30–50°C/W depending on PCB copper area | Required for automated SMT assembly; lower profile but higher thermal reliance on PCB layout | Select when board space or reflow compatibility outweighs ease of manual heatsink mounting. |
| LMR51430RNXR | Synchronous buck, 4.5–36-V input, 3-A, 500-kHz/1.1-MHz selectable frequency, integrated MOSFETs, 92% peak efficiency | Higher efficiency, smaller solution size, but requires more complex layout and external compensation | Select when efficiency >90% or footprint reduction is critical; not drop-in compatible due to different pinout and control scheme. |
Compared with LM2596T-5.0/NOPB, LM2596SX-5.0/NOPB offers identical regulation performance in an SMT package ideal for volume production, while LMR51430RNXR delivers significantly higher efficiency and integration at the cost of design complexity and non-interchangeable footprint.
Availability
LM2596T-5.0/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, embedded system rails, and appliance control boards requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM2596T-5.0/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 solutions.
The LM2596 series belongs to TI's SIMPLE SWITCHER® portfolio, designed specifically for cost-sensitive, medium-power DC-DC applications where ease of use, minimal external components, and rugged operation are prioritized over ultra-high efficiency or ultra-small footprint.
FAQ
What is the maximum input voltage rating for LM2596T-5.0/NOPB?
The absolute maximum input voltage for LM2596T-5.0/NOPB is 45 V, but the recommended operating range is 4.5 V to 40 V DC. Operation above 40 V risks exceeding internal transistor breakdown limits and invalidates guaranteed performance specifications. Always include input transient suppression if used in automotive or industrial environments with potential load-dump spikes.
Does LM2596T-5.0/NOPB require external feedback resistors?
No, LM2596T-5.0/NOPB does not require external feedback resistors. It is a fixed-output variant with internal resistor divider set to 5.0 V, eliminating the need for external components on the feedback pin. This simplifies layout, improves reliability, and ensures consistent regulation without resistor tolerance drift affecting output accuracy.
Can LM2596T-5.0/NOPB be used in an inverting configuration to generate –5 V?
Yes, LM2596T-5.0/NOPB can be configured as an inverting regulator to produce –5 V output, as documented in TI's SNVS124G datasheet Figure 8-5. This requires bootstrapping the ground pin to the negative output and adding external diodes (D1, D3) and modified capacitor values. Startup current exceeds 4 A briefly, so delayed start-up via the ON/OFF pin is strongly recommended.
What thermal performance can be expected from LM2596T-5.0/NOPB in TO-220 package?
In the TO-220-5 (NDH) package, LM2596T-5.0/NOPB achieves RθJC = 2°C/W to the tab and RθJA ≈ 50°C/W with 1 in² of 1-oz copper on a single-layer board. With a properly mounted heatsink (e.g., 10°C/W), it sustains 3 A continuously at 25°C ambient. Derating begins above 60°C ambient unless additional copper or airflow is provided.
Is LM2596T-5.0/NOPB RoHS compliant and lead-free?
Yes, LM2596T-5.0/NOPB is RoHS compliant and lead-free. The "/NOPB" suffix explicitly denotes lead-free packaging per JEDEC J-STD-609, with matte tin lead finish and halogen-free molding compound. It meets TI's environmental standards for industrial and consumer applications without exemption requests.
LM2596T-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
LM2596T-5.0/NOPB FAQ
1.How can I place an order for LM2596T-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2596T-5.0/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 LM2596T-5.0/NOPB reliable?
The price and inventory of LM2596T-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2596T-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2596T-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2596T-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2596T-5.0/NOPB?
LM2596T-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2596T-5.0/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 LM2596T-5.0/NOPB?
For technical support, including LM2596T-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2596T-5.0/NOPB requirements.
6.How does Aetrix verify that LM2596T-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2596T-5.0/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 LM2596T-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2596T-5.0/NOPB?
All LM2596T-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2596T-5.0/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 LM2596T-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2596T-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2596T-5.0/NOPB Tags
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