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Texas Instruments LM2595T-5.0/NOPB
- Part No.:
- LM2595T-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2595T-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:889
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Product details
Overview
LM2595T-5.0/NOPB from Texas Instruments is a monolithic 150-kHz nonsynchronous step-down DC-DC converter delivering up to 1 A at fixed 5 V output, with ±4% output voltage tolerance over line and load, 4.5–40 V input range, and thermal/current-limit protection. It serves as an efficient buck regulator in industrial power supplies and embedded system rails.
For engineers reviewing the LM2595T-5.0/NOPB datasheet, LM2595T-5.0/NOPB pinout, LM2595T-5.0/NOPB application, or LM2595T-5.0/NOPB equivalent, key selection criteria include its fixed 5-V output, TO-220-5 package thermal performance, 85 μA standby current under TTL shutdown, and compatibility with standard off-the-shelf inductors for rapid design implementation.
Technical Context
The LM2595T-5.0/NOPB integrates a PWM controller, power switch, and internal frequency compensation operating at a fixed 150 kHz (±15% over temperature). Its nonsynchronous architecture uses an external catch diode and requires only four external components: input capacitor, output capacitor, inductor, and feedback network (not needed for fixed-output versions).
It implements undervoltage lockout via the ON/OFF pin with 1.3 V threshold, supports delayed start-up using RC timing on that pin, and provides two-stage current limiting-first stage limits peak switch current to 1.2–2.4 A, second stage reduces oscillator frequency under overload. Thermal shutdown activates at 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures stable rail without external resistor divider. |
| Max Output Current | 1 A DC continuous - supports medium-power microcontrollers, sensors, and logic rails without derating at ≤50°C ambient. |
| Input Voltage Range | 4.5 V to 40 V - accommodates 5 V, 12 V, 24 V, and unregulated battery or adapter inputs. |
| Switching Frequency | 150 kHz (110–173 kHz over temp) - enables use of compact, low-cost 100–330 μH inductors with minimal EMI filtering. |
| Standby Quiescent Current | 85 μA typical at 25°C - enables low-power sleep modes in battery-backed systems. |
| Efficiency | 82% typical at VIN = 12 V, IOUT = 1 A - reduces thermal load vs. linear regulators in high-dropout scenarios. |
| Saturation Voltage | 1.2 V max at IOUT = 1 A - defines minimum dropout (VIN ≥ VOUT + VSAT ≈ 6.2 V) and conduction loss. |
| Thermal Resistance | RθJA = 50°C/W on 1-in² PCB copper - allows operation at full load without heatsink below 50°C ambient. |
Pinout & Package
LM2595T-5.0/NOPB is supplied in a 5-pin TO-220 package (NDH variant), with the tab electrically connected to Pin 3 (Ground) and thermally coupled to the PCB copper pour for heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Internal Switch Drain | High-frequency switching node; connects to inductor and catch diode anode - requires minimal PCB copper area to reduce EMI coupling. |
| 2 (+VIN) | Power Input | Connects to input capacitor (low-ESR aluminum/tantalum); must be placed adjacent to IC to suppress switching transients. |
| 3 (GND) | Circuit Ground | Reference for all internal circuitry and thermal path; tab is GND - must be soldered to ≥1-in² copper pour for thermal management. |
| 4 (FB) | Feedback Input | Internally tied to 5-V reference; left unconnected for fixed-output version - unused pin but must remain floating or grounded per layout guidelines. |
| 5 (ON/OFF) | Shutdown Control | TTL-compatible enable: <1.3 V = ON, >1.3 V = OFF; draws ≤200 μA in shutdown - supports system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5-V Output | Eliminates external resistor divider, reducing BOM count and improving long-term output stability vs. adjustable variants. |
| 150-kHz Fixed Oscillator | Enables predictable EMI spectrum and simplifies filter design compared to variable-frequency controllers. |
| TTL Shutdown with 85-μA Standby | Permits precise system-level power gating while minimizing quiescent drain in always-on subsystems. |
| Integrated Thermal & Current Protection | Prevents catastrophic failure during overload or poor heatsinking - no external sensing or latch circuitry required. |
| TO-220-5 Package with GND Tab | Provides mechanical robustness and direct thermal path to PCB, enabling full 1-A operation without external heatsink at moderate ambient temperatures. |
| Requires Only 4 External Components | Reduces design cycle time and layout complexity - input cap, output cap, inductor, and catch diode are the sole external requirements. |
Applications
| Industrial Power Supply | Embedded Microcontroller Rail |
|---|---|
Use Scenario: Converting 24 V factory bus to regulated 5 V for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, stable 5-V supply with line/load regulation < ±0.5%. Use Value: Delivers 1 A continuously at 82% efficiency, reducing heat generation versus linear regulators and eliminating need for heatsinks in DIN-rail enclosures. | Use Scenario: Powering ARM Cortex-M4-based edge gateway with real-time Ethernet and USB peripherals. IC Role / Device Role / Timing Role: Main 5-V system rail generator with fast transient response to CPU burst loads. Use Value: 150-kHz switching enables small 100-μH shielded inductor and low-profile 22-μF tantalum output capacitor, fitting tight board space constraints. |
| Automotive Body Control Module | Test & Measurement Equipment |
Use Scenario: Generating 5 V from 12 V vehicle battery for CAN transceivers and EEPROM programming circuits. IC Role / Device Role / Timing Role: Pre-regulator feeding low-noise LDOs, handling wide input transients (up to 40 V load dump). Use Value: 40 V absolute max input rating and built-in thermal shutdown ensure reliability during cold-crank and load-dump events without external protection. | Use Scenario: Providing clean 5-V bias for precision ADC front-ends and op-amp signal chains in portable DMMs. IC Role / Device Role / Timing Role: High-efficiency intermediate rail with low standby current for battery-operated instruments. Use Value: 85 μA shutdown current extends battery life between measurements; ±4% output tolerance meets 12-bit ADC reference accuracy requirements. |
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/NOPB | Higher 3-A output capability, 150-kHz frequency, same pinout and footprint - but larger die size and higher RDS(on). | Better suited for higher-current rails (e.g., FPGA core supplies); requires larger inductor and heatsinking at full load. | Select when >1 A output or improved thermal margin is required; not drop-in due to higher peak currents and layout adjustments. |
| MP1584EN-LF-Z | 3-A synchronous buck, 1.5-MHz switching, smaller SO-8EP package - no external diode needed, lower quiescent current (20 μA). | Enables ultra-compact designs with reduced BOM count; lacks integrated thermal shutdown latch and has tighter input voltage range (4.5–28 V). | Choose for space-constrained, high-efficiency applications where synchronous rectification and higher frequency are advantageous. |
Compared with LM2595T-5.0/NOPB, LM2596T-5.0/NOPB offers higher current headroom at the cost of larger thermal footprint, while MP1584EN-LF-Z delivers superior efficiency and miniaturization but sacrifices ruggedness in automotive transients and ease of thermal management.
Availability
LM2595T-5.0/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, embedded microcontroller rails, automotive body control modules, and test & measurement equipment requiring stable component supply across extended product lifecycles.
Supply support for LM2595T-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 ICs.
The LM2595 series belongs to TI's SIMPLE SWITCHER® portfolio - designed specifically for engineers needing robust, easy-to-implement DC-DC buck regulators with minimal external components and proven field reliability in industrial and automotive environments.
FAQ
What is the maximum input voltage rating for LM2595T-5.0/NOPB?
The LM2595T-5.0/NOPB has an absolute maximum input voltage rating of 45 V, with recommended operating range from 4.5 V to 40 V. Exceeding 40 V during normal operation risks violating safe operating area limits, especially under high ambient temperatures or heavy load conditions. The device includes internal protection, but sustained operation above 40 V may compromise long-term reliability and is outside specified performance guarantees.
Does LM2595T-5.0/NOPB require an external feedback resistor network?
No, LM2595T-5.0/NOPB does not require an external feedback resistor network. As a fixed-output 5-V variant, its feedback reference is internally trimmed and connected - Pin 4 (FB) is unused and must be left floating or grounded per TI layout recommendations. This eliminates resistor tolerance errors and simplifies design versus the adjustable LM2595 version.
Can LM2595T-5.0/NOPB operate without a heatsink?
Yes, LM2595T-5.0/NOPB can operate without an external heatsink when mounted on a PCB with ≥1 in² of 1-oz copper connected to its GND tab, provided ambient temperature remains ≤50°C and output current is ≤1 A. Thermal resistance is 50°C/W under those conditions, resulting in ~50°C junction rise - well within the 150°C maximum. At higher ambient or continuous full-load conditions, additional copper or a small heatsink is advised.
What type of catch diode is recommended for LM2595T-5.0/NOPB?
Texas Instruments recommends a Schottky diode rated for ≥3 A average current and ≥60 V PIV for LM2595T-5.0/NOPB. A 3-A, 40-V Schottky (e.g., SB340) is optimal for 12-V input applications due to low forward voltage (~0.45 V), minimizing conduction loss and improving efficiency. Fast recovery diodes may be used for higher input voltages (>24 V) where Schottky leakage becomes problematic, but they increase switching losses.
Is LM2595T-5.0/NOPB RoHS compliant and lead-free?
Yes, LM2595T-5.0/NOPB is RoHS compliant and lead-free. The "/NOPB" suffix explicitly denotes "No Lead (Pb)-Free", indicating compliance with EU RoHS Directive 2011/65/EU and TI's green packaging standards. The TO-220 package uses matte tin lead finish and halogen-free molding compound, with full material declarations available in TI's official product change notifications.
LM2595T-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:
- 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/NOPB FAQ
1.How can I place an order for LM2595T-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2595T-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 LM2595T-5.0/NOPB reliable?
The price and inventory of LM2595T-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 LM2595T-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2595T-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2595T-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2595T-5.0/NOPB?
LM2595T-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2595T-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 LM2595T-5.0/NOPB?
For technical support, including LM2595T-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2595T-5.0/NOPB requirements.
6.How does Aetrix verify that LM2595T-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2595T-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 LM2595T-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2595T-5.0/NOPB?
All LM2595T-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2595T-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 LM2595T-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2595T-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2595T-5.0/NOPB Tags
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