My Inquiry
My Account
Texas Instruments LM2595T-5.0/LF02
- Part No.:
- LM2595T-5.0/LF02
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2595T-5.0/LF02.pdf
- Description:
- IC REG BUCK 5V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,106
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2595T-5.0/LF02 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 switching regulators and preregulators for linear supplies.
For engineers reviewing the LM2595T-5.0/LF02 datasheet, LM2595T-5.0/LF02 pinout, LM2595T-5.0/LF02 application, or LM2595T-5.0/LF02 equivalent, key selection criteria include verified 5 V fixed output accuracy, TO-220-5 package thermal performance, ON/OFF logic control threshold (1.3 V), and compatibility with standard off-the-shelf inductors and catch diodes.
Technical Context
The LM2595T-5.0/LF02 integrates a PWM controller, power switch, and internal frequency compensation operating at a fixed 150 kHz (±15% over temperature). It uses external components - one inductor, one catch diode, and two capacitors - to form a complete buck topology with discontinuous or continuous conduction mode capability.
Its feedback loop senses output voltage via an internal 1.23 V reference and resistor divider network; the ON/OFF pin enables TTL-compatible shutdown with 85 μA standby current. Protection includes two-stage current limiting (1.2–2.4 A peak) and thermal shutdown at 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5 V ±4% over full line/load/temperature range - ensures stable rail for microcontrollers and analog circuitry without external resistors. |
| Max Output Current | 1 A DC - supports mid-power embedded systems without external current boosting. |
| Input Voltage Range | 4.5 V to 40 V - accommodates wide industrial input sources including 12 V, 24 V, and 36 V battery or bus rails. |
| Switching Frequency | 150 kHz (110–173 kHz over temperature) - enables use of compact, low-cost 10–100 μH inductors with minimal EMI filtering. |
| Efficiency | 82% at VIN = 12 V, IOUT = 1 A - reduces thermal load compared to linear regulators in similar applications. |
| Standby Current | 85 μA typical at shutdown - preserves battery life in always-on or low-power wake-up systems. |
| Thermal Shutdown | Active at TJ ≥ 150°C - prevents permanent damage during overload or poor heatsinking conditions. |
Pinout & Package
LM2595T-5.0/LF02 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 area for heat dissipation. No heatsink required below 50°C ambient at ≤1 A load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Output | Internal switch drain | Swings between (VIN − VSAT) and ≈ –0.5 V; requires minimal PCB copper area to reduce EMI coupling into sensitive circuits. |
| 2 - +VIN | Power input | Accepts 4.5–40 V; must be bypassed with low-ESR capacitor near the pin to supply high di/dt switching current. |
| 3 - Ground | Reference and thermal path | Common return for all internal circuitry; tab connection provides primary thermal conduction path to PCB. |
| 4 - Feedback | Voltage sense input | Monitors regulated 5 V output via internal 1.23 V reference; open for fixed-output versions - no external divider needed. |
| 5 - ON/OFF | Logic enable/disable | TTL-compatible control: <1.3 V = ON, >1.3 V = OFF; draws only 5–15 μA when active, enabling low-power system sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5 V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity while guaranteeing ±4% regulation across –40°C to +125°C. |
| 150-kHz fixed oscillator | Enables predictable EMI spectrum and consistent filter design using standard, low-cost inductors instead of custom magnetics. |
| TTL shutdown interface | Allows direct connection to microcontroller GPIO or system supervisor ICs without level-shifting circuitry. |
| Integrated protection | Combines cycle-by-cycle current limiting and thermal shutdown - avoids need for external fault monitoring or discrete protection ICs. |
| Minimal external parts | Requires only four components (inductor, diode, input cap, output cap) - accelerates design validation and reduces board space vs. controller-based solutions. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Converting 24 V vehicle battery to stable 5 V for MCU, CAN transceivers, and sensors in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, noise-immune 5 V rail with built-in transient suppression and thermal resilience. Use Value: Operates reliably across –40°C to +125°C ambient, withstands load dump pulses up to 40 V, and maintains regulation during cold-crank (down to 4.5 V). | Use Scenario: On-board 5 V supply for infotainment head unit logic, display backlight drivers, and USB peripherals. IC Role / Device Role / Timing Role: High-efficiency preregulator stepping down 12 V battery voltage before LDOs, reducing heat generation and improving system efficiency. Use Value: 82% efficiency at 1 A eliminates need for large heatsinks; ON/OFF pin enables synchronized power sequencing with main SoC. |
| Programmable Logic Controller (PLC) I/O Card | Medical Diagnostic Handheld |
Use Scenario: Generating clean 5 V for digital isolators, ADC references, and fieldbus interface ICs on modular PLC backplanes. IC Role / Device Role / Timing Role: Isolated DC-DC stage delivering regulated 5 V with low ripple and fast transient response to support real-time I/O timing. Use Value: Fixed 5 V output eliminates calibration drift from resistor tolerances; thermal shutdown prevents latch-up during short-circuit faults on field wiring. | Use Scenario: Battery-powered handheld ultrasound or glucose meter requiring long runtime and precise analog front-end biasing. IC Role / Device Role / Timing Role: Main system regulator converting single-cell Li-ion (3.0–4.2 V) or dual-cell alkaline (1.8–3.2 V) to stable 5 V for processor and sensor interfaces. Use Value: 85 μA shutdown current extends battery life in sleep mode; 4.5 V minimum input supports operation down to nearly depleted cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2595SX-5.0 | TO-263-5 surface-mount package; identical electrical specs and pinout but different thermal profile (RθJA = 50°C/W vs. 50°C/W on 1-in² copper). | Suitable for automated SMT assembly; requires PCB thermal relief design for heatsinking instead of mechanical mounting. | Select LM2595SX-5.0 when board space is constrained and reflow compatibility is required. |
| LM2596-5.0 | Higher 150 kHz oscillator tolerance (±15% vs. ±15%), same 5 V output, but improved efficiency (up to 88%) and lower quiescent current (50 μA vs. 85 μA). | Better suited for battery-sensitive designs; shares same footprint and pinout but requires updated inductor selection per datasheet. | Choose LM2596-5.0 for new designs where higher efficiency and lower standby draw are critical. |
Compared with LM2595T-5.0/LF02, LM2595SX-5.0 offers identical regulation and protection in a surface-mount format ideal for volume production, while LM2596-5.0 delivers measurable efficiency gains and lower IQ - both require no schematic changes but may need minor layout or thermal adjustments.
Availability
LM2595T-5.0/LF02 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and medical handheld devices requiring stable component supply, long-term lifecycle continuity, and traceable sourcing.
Supply support for LM2595T-5.0/LF02 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 over 50 years of innovation in high-reliability power conversion ICs.
The LM2595 series belongs to TI's SIMPLE SWITCHER® portfolio - designed specifically for ease-of-use, minimal external component count, and robust operation in industrial, automotive, and consumer power applications.
FAQ
What is the maximum input voltage rating for LM2595T-5.0/LF02?
The absolute maximum input voltage for LM2595T-5.0/LF02 is 45 V, but the recommended operating range is 4.5 V to 40 V. Exceeding 40 V continuously risks exceeding internal power dissipation limits and triggering thermal shutdown. The device is commonly used with 12 V, 24 V, and 36 V industrial or automotive inputs, and its 40 V upper limit accommodates transient surges like load dump in automotive environments.
Does LM2595T-5.0/LF02 require external feedback resistors to set the output voltage?
No, LM2595T-5.0/LF02 does not require external feedback resistors. As a fixed 5 V output version, it internally connects the feedback node to a precision 1.23 V reference, eliminating the need for external resistor dividers. Pin 4 (Feedback) is left unconnected in standard operation - simplifying layout, reducing part count, and avoiding resistor tolerance-induced output drift.
Can LM2595T-5.0/LF02 be used in an inverting (positive-to-negative) configuration?
Yes, LM2595T-5.0/LF02 can be configured as a positive-to-negative inverting regulator, generating –5 V from a positive input. This requires reconfiguring the ground and feedback connections per TI's Figure 18 application circuit. Note that startup current demand increases significantly, and the ON/OFF pin threshold shifts to ~13 V in this topology - requiring level-shifting for proper shutdown control.
What is the thermal resistance (RθJA) of LM2595T-5.0/LF02 in its TO-220 package?
For LM2595T-5.0/LF02 in the TO-220-5 (NDH) package, RθJA is 50°C/W when mounted on a printed-circuit board with approximately 1 in² of 1-oz copper area. With 2.5 in² of copper, RθJA improves to 30°C/W, and with double-sided 3 in² copper, it reaches 20°C/W. These values assume standard JEDEC 4-layer test board conditions - actual performance depends on PCB layout, copper thickness, and heatsinking.
Is LM2595T-5.0/LF02 RoHS compliant and lead-free?
Yes, LM2595T-5.0/LF02 is RoHS compliant and lead-free. The "/LF02" suffix explicitly denotes lead-free, halogen-free, and RoHS-compliant packaging per TI's product marking convention. It meets JEDEC J-STD-020 moisture sensitivity level (MSL) 3 and is qualified for industrial temperature range (–40°C to +125°C).
LM2595T-5.0/LF02 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):
- 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/LF02 FAQ
1.How can I place an order for LM2595T-5.0/LF02 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2595T-5.0/LF02 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/LF02 reliable?
The price and inventory of LM2595T-5.0/LF02 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/LF02 is usually 5 days.
3.What payment methods are accepted for LM2595T-5.0/LF02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2595T-5.0/LF02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2595T-5.0/LF02?
LM2595T-5.0/LF02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2595T-5.0/LF02 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/LF02?
For technical support, including LM2595T-5.0/LF02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2595T-5.0/LF02 requirements.
6.How does Aetrix verify that LM2595T-5.0/LF02 is sourced from the original manufacturer or authorized distributors?
All LM2595T-5.0/LF02 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/LF02 meets industry standards.
7.What is the process for return or replacement of LM2595T-5.0/LF02?
All LM2595T-5.0/LF02 units undergo pre-shipment inspection (PSI). If there is an issue with LM2595T-5.0/LF02, 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/LF02 part is unused and in its original packaging.
Return procedure for LM2595T-5.0/LF02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2595T-5.0/LF02 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
