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Texas Instruments LM2595T-5.0
- Part No.:
- LM2595T-5.0
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2595T-5.0.pdf
- Description:
- IC REG BUCK 5V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,836
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Product details
Overview
LM2595T-5.0 from Texas Instruments is a monolithic 150-kHz nonsynchronous step-down DC-DC converter delivering up to 1 A output current with fixed 5 V output, ±4% output voltage tolerance over line and load, 4.5–40 V input range, and integrated thermal shutdown and current-limit protection - used in on-card power supplies for industrial control modules.
For engineers reviewing the LM2595T-5.0 datasheet, LM2595T-5.0 pinout, LM2595T-5.0 application, or LM2595T-5.0 equivalent, key selection criteria include output voltage accuracy at full load, thermal performance in TO-220 without heatsink below 50°C, standby current under TTL shutdown, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2595T-5.0 implements a fixed-frequency (150 kHz) PWM buck topology with internal oscillator, frequency compensation, and a single N-channel DMOS power switch. It operates in continuous conduction mode by default but supports discontinuous mode at light loads via inductor selection.
Feedback is implemented through a resistive divider network connected to the Feedback pin, referenced to an internal 1.23 V bandgap reference. Shutdown is TTL-compatible via the ON/OFF pin, which pulls regulator quiescent current down to 85 μA when driven above 1.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5 V ±4% over full line/load/temperature range - ensures stable logic supply for microcontrollers without external adjustment. |
| Max Output Current | 1 A DC - supports moderate-power digital subsystems such as sensor interfaces or communication peripherals. |
| Input Voltage Range | 4.5 V to 40 V - enables direct operation from 12 V or 24 V industrial rails, automotive batteries, or unregulated AC/DC adapters. |
| Switching Frequency | 150 kHz (±15%) - allows use of compact, low-cost 10–100 μH inductors and reduces EMI compared to lower-frequency alternatives. |
| Efficiency | 82% at VIN = 12 V, IOUT = 1 A - minimizes thermal dissipation in space-constrained PCB layouts. |
| Standby Quiescent Current | 85 μA typical at shutdown - extends battery life in always-on monitoring systems with periodic wake-up cycles. |
| Thermal Protection | Internal junction temperature shutdown at 150°C - prevents catastrophic failure during overload or poor heatsinking. |
Pinout & Package
LM2595T-5.0 is supplied in a 5-pin TO-220 package (NDH variant), with exposed tab electrically connected to Pin 3 (Ground) for thermal conduction and mechanical mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Output | Switch node | Drives external catch diode and inductor; voltage swings between (VIN − VSAT) and ≈ –0.5 V - requires minimal PCB copper area to reduce EMI coupling. |
| 2 - +VIN | Power input | Accepts 4.5–40 V DC; requires local low-ESR bypass capacitor to supply high di/dt switching current and suppress transients. |
| 3 - Ground | Reference and thermal path | Common return for all internal circuits; tab connection provides primary thermal conduction path to heatsink or copper pour. |
| 4 - Feedback | Voltage sense input | Monitors regulated output via resistor divider; internal 1.23 V reference sets 5 V output - open-circuit disables regulation. |
| 5 - ON/OFF | Logic enable/disable | TTL-compatible shutdown control; <1.3 V enables, >1.3 V disables - can be tied to GND for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated thermal shutdown | Automatically disables switching at 150°C junction temperature - eliminates need for external thermal sensors in sealed enclosures. |
| Two-stage current limiting | Peak switch current limit of 1.5 A (typical) with frequency foldback under overload - sustains safe operation during short-circuit events without latch-up. |
| Low-component-count design | Requires only four external components (inductor, diode, input/output capacitors) - accelerates prototyping and reduces BOM cost and footprint. |
| Fixed 5 V output version | No feedback resistor network required - eliminates tuning errors and improves production yield for standardized 5 V rail generation. |
| Standard inductor compatibility | Optimized for widely available 10–100 μH shielded power inductors - avoids proprietary magnetics and simplifies sourcing. |
Applications
| Industrial Sensor Node Power | Embedded Controller Pre-regulator |
|---|---|
Use Scenario: Powering 3.3 V microcontroller, analog front-end, and RS-485 transceiver from a 24 V field bus. IC Role / Device Role / Timing Role: Primary step-down regulator generating clean 5 V intermediate rail for LDO post-regulation. Use Value: Delivers 1 A at 82% efficiency with no heatsink required below 50°C ambient - reduces system size and thermal management complexity. | Use Scenario: Supplying 5 V to a linear regulator that powers noise-sensitive ADC circuitry. IC Role / Device Role / Timing Role: Efficient preregulator lowering 12 V input to 5 V before low-noise LDO filtering. Use Value: Reduces LDO power dissipation by >70% versus direct 12 V-to-3.3 V linear regulation - extends reliability and enables smaller LDO packages. |
| On-Card DC-DC Conversion | Positive-to-Negative Converter |
Use Scenario: Generating local 5 V rail on a dense FPGA carrier board with limited board area. IC Role / Device Role / Timing Role: Compact, self-contained buck converter replacing multi-chip discrete solutions. Use Value: TO-220 package with integrated control and power switch occupies <1 cm² footprint - frees routing layers for high-speed signals. | Use Scenario: Creating –5 V supply for op-amp biasing or legacy interface ICs from existing +12 V rail. IC Role / Device Role / Timing Role: Inverting buck-boost configuration using LM2595T-5.0's internal switch and ground-referenced feedback. Use Value: Enables bipolar supply generation without dedicated inverting IC - leverages same BOM and layout for multiple rail types. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596T-5.0 | Higher 150 kHz oscillator tolerance (±15% vs ±15%), identical pinout and function, but improved line regulation (0.2% vs 0.5%) and higher efficiency (88% at 12 V→5 V/1 A). | Preferred where tighter output voltage stability and lower thermal rise are critical; requires same external components. | Select LM2596T-5.0 for new designs requiring marginally better regulation or efficiency; LM2595T-5.0 remains valid for cost-sensitive or legacy-replacement use. |
| MP1584EN-LF-Z | Higher switching frequency (1.5 MHz), smaller external components, but requires external compensation and lacks integrated thermal shutdown flag. | Better suited for ultra-compact layouts where PCB area is constrained; not drop-in due to different pinout and control architecture. | Choose MP1584EN-LF-Z only when board space is severely limited and design team has experience with high-frequency buck loop compensation. |
Compared with LM2596T-5.0, LM2595T-5.0 offers proven robustness and simpler layout at slightly lower efficiency; versus MP1584EN-LF-Z, it trades higher-frequency integration for plug-and-play reliability and built-in fault protection - making LM2595T-5.0 optimal for industrial environments prioritizing long-term stability over miniaturization.
Availability
LM2595T-5.0 is available at Aetrix Electronics and suitable for industrial sensor nodes, embedded controller power rails, and on-card DC-DC conversion requiring stable component supply across extended product lifecycles.
Supply support for LM2595T-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 company specializing in analog and embedded processing technologies, with leadership in power management ICs since the 1970s.
The LM2595 series belongs to TI's SIMPLE SWITCHER® portfolio - designed specifically for ease-of-use, minimal external component count, and rugged operation in industrial and automotive power supply applications.
FAQ
What is the maximum input voltage rating for the LM2595T-5.0?
The LM2595T-5.0 has an absolute maximum input voltage rating of 45 V, with recommended operating range from 4.5 V to 40 V. Exceeding 40 V continuously risks premature device failure due to increased stress on the internal power switch and thermal limitations - always verify transient conditions with input clamping or filtering when used near the upper limit.
Does the LM2595T-5.0 require an external feedback resistor network?
No, the LM2595T-5.0 does not require external feedback resistors because it integrates the voltage divider for the fixed 5 V output. The internal reference and resistor network are trimmed during manufacturing to achieve ±4% output accuracy - eliminating calibration steps and reducing BOM count versus adjustable versions like LM2595T-ADJ.
Can the LM2595T-5.0 operate without a heatsink?
Yes, the LM2595T-5.0 in TO-220 package typically operates without a heatsink at full 1 A load when ambient temperature stays below 50°C and input voltage is ≤12 V. At higher input voltages or elevated ambient temperatures, thermal derating applies - consult the RθJA values (50°C/W on 1-in² copper) and junction temperature calculations in the datasheet to confirm safe operation for your specific layout.
What happens to the LM2595T-5.0 during thermal shutdown?
When the LM2595T-5.0 junction temperature reaches approximately 150°C, internal thermal shutdown disables the power switch and halts switching operation. The device remains in this state until junction temperature falls by ~15°C, then automatically resumes regulation - no external reset or power cycle is needed. This protects against permanent damage during sustained overload or inadequate cooling.
Is the LM2595T-5.0 pin-compatible with other LM2595 variants?
Yes, all LM2595 variants - including LM2595T-3.3, LM2595T-12, LM2595T-ADJ, and LM2595T-5.0 - share identical 5-pin TO-220 and TO-263 pinouts and electrical interfaces. This allows direct substitution in existing designs when changing output voltage requirements, provided external components (especially feedback network for adjustable versions) are updated accordingly.
LM2595T-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- 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:
- 1A
- 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
LM2595T-5.0 FAQ
1.How can I place an order for LM2595T-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2595T-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 LM2595T-5.0 reliable?
The price and inventory of LM2595T-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 LM2595T-5.0 is usually 5 days.
3.What payment methods are accepted for LM2595T-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2595T-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2595T-5.0?
LM2595T-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2595T-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 LM2595T-5.0?
For technical support, including LM2595T-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2595T-5.0 requirements.
6.How does Aetrix verify that LM2595T-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2595T-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 LM2595T-5.0 meets industry standards.
7.What is the process for return or replacement of LM2595T-5.0?
All LM2595T-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2595T-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 LM2595T-5.0 part is unused and in its original packaging.
Return procedure for LM2595T-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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