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Texas Instruments LM2596T-5.0
- Part No.:
- LM2596T-5.0
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2596T-5.0.pdf
- Description:
- IC REG BUCK 5V 3A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,985
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Product details
Overview
LM2596T-5.0 from Texas Instruments is a monolithic 150-kHz nonsynchronous buck DC-DC converter delivering up to 3 A output current with fixed 5.0-V output, ±4% tolerance over line and load, 4.5–40 V input range, and integrated thermal/current protection. It serves as the primary voltage regulator in mid-power embedded power supplies.
For engineers reviewing the LM2596T-5.0 datasheet, LM2596T-5.0 pinout, LM2596T-5.0 application, or LM2596T-5.0 equivalent, key selection criteria include its fixed 5-V output, TO-220-5 package thermal performance, 80 μA shutdown quiescent current, and compatibility with standard off-the-shelf inductors and catch diodes.
Technical Context
The LM2596T-5.0 implements a fixed-frequency (150 kHz) pulse-width modulation control architecture with internal compensation, enabling stable regulation using only four external components. Its internal NPN switch features 1.4 V typical saturation voltage at 3 A and a two-stage current limit (4.5 A typical peak) for fault protection.
Operation includes TTL-compatible ON/OFF control (1.3 V threshold), undervoltage lockout behavior, and discontinuous conduction mode capability at light loads. Thermal shutdown activates at 150°C junction temperature, and the device maintains ±4% output accuracy across –40°C to +125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% (ensures stable logic supply for microcontrollers and peripherals) |
| Max Output Current | 3 A DC (supports mid-power systems like industrial controllers and audio amplifiers) |
| Input Voltage Range | 4.5 V to 40 V (accepts wide-range unregulated inputs including 12/24 V rails and automotive batteries) |
| Switching Frequency | 150 kHz ±15% (enables use of compact, low-cost 33–100 μH inductors) |
| Quiescent Current | 80 μA in shutdown (minimizes standby power in battery-backed systems) |
| Efficiency | 80% typical at 12 VIN/3 A (reduces thermal load vs. linear regulators) |
| Thermal Shutdown | 150°C junction (prevents damage during overload or poor heatsinking) |
| Package | TO-220-5 (vertical mount, 50°C/W θJA on 1-in² copper, enables direct heatsink attachment) |
Pinout & Package
LM2596T-5.0 is supplied in a 5-pin TO-220 (NDH) package with vertical lead bend, 14.986 mm × 10.16 mm body size, and electrically isolated tab (connected to Pin 3 Ground). The tab must be thermally coupled to a heatsink for operation above ~1.5 A continuous load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 4.5–40 V; requires local 100-μF electrolytic bypass capacitor to handle high di/dt switching currents |
| 2 - OUTPUT | Internal switch collector | Swings between ~VIN−1.4 V and −0.5 V; PCB copper area must be minimized to reduce EMI coupling |
| 3 - GROUND | Circuit reference | Common return for input/output capacitors, feedback network, and heatsink mounting; connects to isolated tab |
| 4 - FEEDBACK | Voltage sense input | Internally tied to 5.0 V output; no external resistor divider required for fixed-version operation |
| 5 - ON/OFF | Logic enable/disable | Pull ≤1.3 V to enable; pull ≥1.3 V to enter 80-μA shutdown; can be grounded for always-on operation |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0-V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity |
| 150-kHz fixed oscillator | Enables predictable EMI filtering and consistent inductor sizing across designs |
| TTL-compatible ON/OFF control | Allows direct interfacing with microcontroller GPIO without level-shifting circuitry |
| Integrated thermal & current limiting | Provides self-protection during short-circuit, overload, or inadequate heatsinking without external circuitry |
| Standard inductor compatibility | Supports widely available 33–100 μH shielded power inductors (e.g., Coilcraft XAL, Bourns SRR) |
| Low component count | Requires only input cap, output cap, catch diode, and inductor-no compensation network needed |
Applications
| Industrial PLC I/O Module | Automotive Infotainment Power |
|---|---|
Use Scenario: Regulating 12 V vehicle battery to clean 5 V for USB host controllers and display logic in head units. IC Role / Device Role / Timing Role: Primary non-isolated step-down regulator supplying core logic voltage with transient immunity against load-dump events. Use Value: Delivers 3 A at 80% efficiency while surviving 40 V input transients and maintaining ±4% output accuracy across –40°C to +85°C. | Use Scenario: Providing stable 5 V to microcontroller, CAN transceiver, and sensor interface circuits in programmable logic controllers. IC Role / Device Role / Timing Role: Central power management IC converting unregulated 24 V industrial rail to noise-immune digital supply. Use Value: Enables compact design with TO-220 heatsink mounting and eliminates need for external current-sense or thermal monitoring circuitry. |
| Home Theater Audio Amplifier | Point-of-Sale Terminal |
Use Scenario: Generating 5 V bias for preamp stages and digital control logic in Class-D amplifier subsystems. IC Role / Device Role / Timing Role: Secondary regulated supply decoupled from main 12/24 V amplifier rail to prevent audio noise coupling. Use Value: 150-kHz switching frequency allows effective LC filtering to achieve <10 mVpp ripple, preserving signal integrity. | Use Scenario: Powering barcode scanner, touchscreen controller, and secure element in retail EPOS terminals. IC Role / Device Role / Timing Role: Single-chip solution replacing linear regulators to improve thermal margin in sealed enclosures. Use Value: 80 μA shutdown current extends battery backup runtime during AC loss; TO-220 package simplifies mechanical integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-5.0 | TO-263-5 surface-mount package; 30°C/W θJA with 2.5-in² copper; identical electrical specs | Suitable for automated SMT assembly and higher-density layouts; lower profile than TO-220 | Select LM2596S-5.0 when board space is constrained and reflow soldering is used. |
| LMR51430RGER | Synchronous 3-A buck; 4.5–36 V input; 500 kHz/1.1 MHz selectable; 92% efficiency; requires external compensation | Higher efficiency and smaller passive components but needs more design effort and layout care | Choose LMR51430RGER for new designs requiring >90% efficiency or footprint reduction, not drop-in replacement. |
Compared with LM2596T-5.0, LM2596S-5.0 offers identical regulation performance in a surface-mount form factor ideal for volume production, while LMR51430RGER delivers significantly higher efficiency and frequency flexibility at the cost of increased design complexity and no pin compatibility.
Availability
LM2596T-5.0 is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment, and consumer audio applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2596T-5.0 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.
The LM2596 series belongs to TI's SIMPLE SWITCHER® portfolio, designed specifically for cost-sensitive, medium-power DC-DC conversion where ease of use, reliability, and minimal external component count are critical.
FAQ
What is the maximum input voltage rating for LM2596T-5.0?
The absolute maximum input voltage for LM2596T-5.0 is 45 V, but the recommended operating range is 4.5 V to 40 V. Operation above 40 V risks exceeding internal transistor breakdown limits and may trigger thermal shutdown before catastrophic failure. For automotive applications with load-dump transients, external clamping (e.g., TVS diode) is advised to keep VIN within 40 V.
Does LM2596T-5.0 require an external feedback resistor network?
No, LM2596T-5.0 does not require external feedback resistors because it integrates the voltage divider for the fixed 5.0-V output. Pin 4 (FEEDBACK) is internally connected to the output, eliminating tuning components and layout sensitivity. This differs from the adjustable LM2596 version, which requires two external resistors to set VOUT.
Can LM2596T-5.0 be used in an inverting (buck-boost) configuration?
Yes, LM2596T-5.0 can be configured as an inverting regulator to generate –5 V from a positive input, as documented in TI's SNVS124G datasheet Figure 8-5. This requires re-referencing the ground pin to the negative output and adding isolation diodes. The ON/OFF threshold shifts to ~13 V in this topology, and startup current demands increase significantly.
What thermal management is required for LM2596T-5.0 at full 3-A load?
At 3 A continuous load with 12 V input, LM2596T-5.0 dissipates ~2.1 W. With its TO-220 package θJA of 50°C/W, junction temperature rise exceeds 100°C above ambient-requiring a heatsink. A 10°C/W heatsink reduces θJA to ~20°C/W, keeping TJ below 125°C at 25°C ambient. Mounting the isolated tab directly to a metal chassis is also effective.
Is LM2596T-5.0 RoHS compliant and halogen-free?
Yes, LM2596T-5.0 is RoHS compliant and halogen-free per TI's official product change notices and packaging data. The TO-220-5 NDH package uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/85% RH.
LM2596T-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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):
- 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 FAQ
1.How can I place an order for LM2596T-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2596T-5.0 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 reliable?
The price and inventory of LM2596T-5.0 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 is usually 5 days.
3.What payment methods are accepted for LM2596T-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2596T-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2596T-5.0?
LM2596T-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2596T-5.0 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?
For technical support, including LM2596T-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2596T-5.0 requirements.
6.How does Aetrix verify that LM2596T-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2596T-5.0 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 meets industry standards.
7.What is the process for return or replacement of LM2596T-5.0?
All LM2596T-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2596T-5.0, 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 part is unused and in its original packaging.
Return procedure for LM2596T-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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