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Texas Instruments LM2594HVN-5.0
- Part No.:
- LM2594HVN-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2594HVN-5.0.pdf
- Description:
- IC REG BUCK 5V 500MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,529
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Product details
Overview
LM2594HVN-5.0 from Texas Instruments is a nonsynchronous step-down DC-DC converter IC delivering 5.0 V at up to 0.5 A, with input voltage support up to 60 V, ±4% output voltage tolerance over line and load, and 150-kHz fixed-frequency operation. It serves as a primary buck regulator in industrial power supplies requiring high-input-voltage tolerance and minimal external components.
For engineers reviewing the LM2594HVN-5.0 datasheet, LM2594HVN-5.0 pinout, LM2594HVN-5.0 application, or LM2594HVN-5.0 equivalent, key selection criteria include HV input capability (60 V max), thermal shutdown protection, TTL-compatible ON/OFF control, and SOIC-8 surface-mount packaging for board space-constrained designs.
Technical Context
The LM2594HVN-5.0 integrates a PWM controller, power switch, oscillator, and feedback comparator in a monolithic buck topology. Its internal 150-kHz oscillator enables predictable EMI behavior and simplifies filter design, while the two-stage current-limit protection provides robust overload handling without external sensing.
It operates in discontinuous conduction mode (DCM) at light loads and transitions to continuous conduction mode (CCM) above ~200 mA. The fixed 5.0-V output eliminates external feedback resistors, and the ON/OFF pin supports logic-level shutdown with 85 μA standby current-critical for low-power system states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures stable microcontroller or analog circuit supply without trimming. |
| Max Input Voltage | 60 V - supports wide-range industrial, automotive, or telecom inputs without pre-regulation. |
| Output Current | 0.5 A DC - sufficient for powering multiple low-power peripherals or small FPGA I/O banks. |
| Switching Frequency | 150 kHz ±15% - balances efficiency, inductor size, and EMI filtering requirements. |
| Standby Current | 85 μA typical - enables ultra-low-power sleep modes in battery-backed or energy-harvesting systems. |
| Saturation Voltage | 1.1 V max at 0.5 A - defines minimum dropout and impacts thermal dissipation under heavy load. |
| Thermal Shutdown | Active at 150°C junction - prevents catastrophic failure during sustained overload or poor heatsinking. |
Pinout & Package
LM2594HVN-5.0 is housed in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body, with exposed pad not present. Pin 1–3 are no-connect (NC) but must be soldered for thermal transfer; pins 4–8 define core switching functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | No Connection | Internally unconnected; PCB soldering improves thermal conduction to board copper. |
| 4 | Feedback | Not used in fixed-output version; left open or grounded per layout guidelines. |
| 5 | ON/OFF | TTL-compatible shutdown input; <1.3 V enables regulation, >1.3 V disables with 85 μA standby draw. |
| 6 | Ground | Power and signal reference; requires low-impedance connection to minimize noise coupling. |
| 7 | +VIN | Main input supply (4.5–60 V); requires local 68-μF tantalum bypass capacitor for stability. |
| 8 | Output | Internal switch node; connects to external catch diode and inductor; high dv/dt demands minimized trace area. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0-V output | Eliminates external resistor divider, reducing BOM count and calibration drift in production. |
| 150-kHz internal oscillator | Enables use of standard off-the-shelf inductors and simplifies EMI compliance testing. |
| TTL shutdown capability | Allows direct interfacing with microcontroller GPIOs without level-shifting circuitry. |
| Thermal shutdown + current limit | Provides self-protection against short-circuit, overtemperature, and inductor saturation faults. |
| Only four external components required | Reduces design time and layout complexity: input cap, output cap, inductor, catch diode. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Converting 24-V vehicle battery or 48-V industrial rail to stable 5-V logic supply for MCU and sensors. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 5-V rail with HV tolerance and fault protection. Use Value: Enables single-stage conversion from high-input rails without pre-regulator losses or complexity. | Use Scenario: Powering CAN transceivers, door lock actuators, and interior lighting controllers in 12-V/24-V automotive systems. IC Role / Device Role / Timing Role: Step-down regulator delivering 5-V supply with transient immunity and thermal resilience. Use Value: Withstands load-dump spikes up to 60 V and maintains regulation during cold-crank conditions. |
| Programmable Logic Controller (PLC) | Point-of-Load Converter for Legacy Equipment |
Use Scenario: Generating isolated 5-V auxiliary supply from 24-V or 48-V backplane in modular PLC I/O modules. IC Role / Device Role / Timing Role: Non-isolated buck regulator supporting distributed power architecture with minimal footprint. Use Value: SOIC-8 package fits dense PCB layouts; 0.5-A output powers multiple digital isolators and interface ICs. | Use Scenario: Retrofitting aging test equipment or instrumentation with modern, efficient 5-V supply replacing linear regulators. IC Role / Device Role / Timing Role: High-efficiency replacement for 7805-style linear regulators in legacy 5-V applications. Use Value: Delivers >82% efficiency at 12-V input vs. <40% for linear regulators-reducing heat sink size and system temperature rise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2594MX-5.0 | Same architecture and specs, but in PDIP-8 package (9.81 mm × 6.35 mm) - larger footprint, higher thermal resistance (95°C/W vs. 150°C/W). | Preferred for through-hole prototyping or legacy wave-solder assembly; unsuitable for compact SMT production. | Select LM2594MX-5.0 only when PDIP mechanical compatibility or manual rework is required. |
| LMR36506RNXR | Synchronous buck, 3–65 V input, 0.6 A, 2.1-MHz switching - smaller solution size, higher efficiency (>90%), integrated MOSFETs. | Requires different layout, inductor, and compensation; not drop-in due to different pinout and control scheme. | Choose LMR36506RNXR for new designs prioritizing efficiency, size, and modern feature set - not for LM2594HVN-5.0 replacement. |
Compared with LM2594HVN-5.0, LM2594MX-5.0 offers identical electrical performance in a through-hole package with inferior thermal performance, while LMR36506RNXR delivers superior efficiency and integration but demands full redesign - making LM2594HVN-5.0 optimal for cost-sensitive, HV-tolerant, SMT-based legacy upgrades.
Availability
LM2594HVN-5.0 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and programmable logic controller (PLC) modules requiring stable component supply, long-lifecycle assurance, and proven reliability in harsh environments.
Supply support for LM2594HVN-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, embedded processing, and power management technologies, with decades of experience in high-reliability power conversion solutions.
The LM2594HV product line was designed for rugged, high-input-voltage DC-DC conversion in industrial, automotive, and telecom infrastructure where simplicity, fault tolerance, and wide VIN range are critical.
FAQ
What is the maximum input voltage rating for LM2594HVN-5.0?
The LM2594HVN-5.0 has an absolute maximum input voltage rating of 60 V, with recommended operating range from 4.5 V to 60 V. This HV rating makes it suitable for applications such as 48-V industrial systems or automotive load-dump scenarios. Exceeding 60 V risks permanent damage, and operation below 4.5 V may prevent startup. Always verify input transient conditions against this limit in final design validation.
Does LM2594HVN-5.0 require external feedback resistors?
No, LM2594HVN-5.0 does not require external feedback resistors because it is a fixed 5.0-V output variant. The feedback network is fully internal, eliminating resistor tolerance errors and layout sensitivity. Pin 4 (Feedback) is unused and should be left open or grounded per TI layout recommendations - unlike adjustable versions such as LM2594HVN-ADJ, which require external resistor dividers.
What package type is used for LM2594HVN-5.0?
LM2594HVN-5.0 uses the 8-pin SOIC (D) surface-mount package with nominal body dimensions of 4.90 mm × 3.91 mm. It is distinct from the PDIP-8 (P) variant (LM2594MX-5.0). The SOIC package supports automated SMT assembly and offers better thermal performance in PCB-mounted configurations than PDIP, though both share identical electrical specifications.
How does the ON/OFF pin function on LM2594HVN-5.0?
The ON/OFF pin (Pin 5) on LM2594HVN-5.0 provides TTL-compatible shutdown control: pulling it below ~1.3 V enables regulation, while pulling it above ~1.3 V disables the switcher and reduces quiescent current to 85 μA typical. If unused, it can be tied directly to ground to ensure always-on operation. The pin tolerates up to 25 V, enabling simple interface with microcontrollers or discrete logic without level shifters.
What protection features are built into LM2594HVN-5.0?
LM2594HVN-5.0 integrates thermal shutdown (activates at 150°C junction temperature), two-stage current limiting (peak switch current limit ~0.8 A), and undervoltage lockout. These protections operate autonomously without external components. During overload, the device reduces switching frequency before entering thermal shutdown - preventing damage during sustained fault conditions while maintaining safe operating area compliance.
LM2594HVN-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LM2594HVN-5.0 FAQ
1.How can I place an order for LM2594HVN-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2594HVN-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 LM2594HVN-5.0 reliable?
The price and inventory of LM2594HVN-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 LM2594HVN-5.0 is usually 5 days.
3.What payment methods are accepted for LM2594HVN-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2594HVN-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2594HVN-5.0?
LM2594HVN-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2594HVN-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 LM2594HVN-5.0?
For technical support, including LM2594HVN-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2594HVN-5.0 requirements.
6.How does Aetrix verify that LM2594HVN-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2594HVN-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 LM2594HVN-5.0 meets industry standards.
7.What is the process for return or replacement of LM2594HVN-5.0?
All LM2594HVN-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2594HVN-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 LM2594HVN-5.0 part is unused and in its original packaging.
Return procedure for LM2594HVN-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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