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Texas Instruments LM2594HVMX-5.0/NOPB
- Part No.:
- LM2594HVMX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2594HVMX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,762
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Product details
Overview
LM2594HVMX-5.0/NOPB from Texas Instruments is a nonsynchronous step-down DC-DC converter IC delivering 5.0 V fixed output at up to 0.5 A, with input voltage support up to 60 V, 150-kHz fixed-frequency operation, and ±4% output voltage tolerance over line and load. It serves as a primary buck regulator in industrial power supplies requiring high-input-voltage resilience.
For engineers reviewing the LM2594HVMX-5.0/NOPB datasheet, LM2594HVMX-5.0/NOPB pinout, LM2594HVMX-5.0/NOPB application, or LM2594HVMX-5.0/NOPB equivalent, key selection criteria include HV input range (4.5–60 V), thermal shutdown protection, TTL-compatible ON/OFF control, low 85-μA standby current, and SOIC-8 surface-mount package compatibility.
Technical Context
The LM2594HVMX-5.0/NOPB integrates a PWM controller, power switch, oscillator, and error amplifier in a single monolithic IC. Its internal 150-kHz oscillator enables predictable EMI behavior and simplifies external filter design, while the two-stage current-limit protection and thermal shutdown ensure robust fault handling without external circuitry.
It operates in continuous conduction mode by default but supports discontinuous mode at light loads, with saturation voltage of 1.1 V max at 0.5 A and feedback reference voltage of 1.23 V. The ON/OFF pin accepts logic-level signals (1.3 V threshold) for precise system-level power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full temperature and load range - ensures stable rail for microcontrollers and analog circuitry without external resistive divider. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-range industrial inputs including 24-V, 36-V, and 48-V nominal systems with margin. |
| Max Output Current | 0.5 A DC - sufficient for powering multiple low-power peripherals or acting as preregulator for LDOs. |
| Switching Frequency | 150 kHz (±15%) - balances efficiency, inductor size, and EMI filtering requirements; avoids AM radio band. |
| Quiescent Current | 140–250 μA (TJ = 25°C to 125°C) - enables low-power standby modes in battery-backed or energy-conscious systems. |
| Standby Current | 85 μA typical when ON/OFF pin >1.3 V - allows deep sleep states with minimal system leakage. |
| Saturation Voltage | 1.1 V max at 0.5 A - directly impacts conduction loss and thermal rise; determines minimum dropout headroom. |
| Feedback Reference | 1.23 V ±2.5% - sets regulation accuracy for adjustable variants; not used internally in fixed-5V version but defines architecture compatibility. |
Pinout & Package
LM2594HVMX-5.0/NOPB is supplied in an 8-pin SOIC (D) surface-mount package with 4.90 mm × 3.91 mm body size and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | No Connection | Internally unconnected; must be soldered to PCB ground plane for optimal thermal transfer per TI recommendation. |
| 4 | Feedback | Not used in fixed-5V version; internally tied to internal resistor divider - leaves pin electrically floating but requires no external connection. |
| 5 | ON/OFF | Logic-controlled enable: <1.3 V = ON, >1.3 V = OFF; supports system-level power sequencing and low-IQ shutdown. |
| 6 | Ground | Power and signal reference return path; must be connected to low-impedance ground plane to minimize noise and thermal resistance. |
| 7 | +VIN | Main input supply pin; requires local 68-μF tantalum or equivalent low-ESR capacitor to suppress switching transients. |
| 8 | Output | Internal power switch collector; connects to external catch diode and inductor; high dv/dt node requiring minimized PCB copper area. |
Key Features
| Feature | Design Value |
|---|---|
| High-Voltage Input Support | 60 V max input enables direct use in 48-V industrial, telecom, and automotive subsystems without pre-regulation. |
| TTL-Compatible Enable | ON/OFF pin accepts standard logic levels (0–5 V), allowing direct interface with microcontrollers or FPGA I/O without level-shifting. |
| Integrated Protection | Thermal shutdown and peak-current limiting eliminate need for external fault-handling circuitry, reducing BOM count and layout complexity. |
| Low Standby Power | 85-μA typical shutdown current extends battery life in portable or backup-power applications where intermittent operation is required. |
| Minimal External Components | Requires only four external parts (inductor, diode, input/output capacitors) - accelerates design cycle and improves reliability vs. discrete solutions. |
| Fixed-Frequency Operation | 150-kHz internal oscillator ensures consistent EMI profile and simplifies compliance testing versus variable-frequency alternatives. |
Applications
| Industrial Sensor Node Power | Automotive Body Control Module |
|---|---|
Use Scenario: Powering 3.3-V microcontroller, RS-485 transceiver, and analog sensor front-end from a 24-V vehicle battery with transient spikes up to 40 V. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 5-V intermediate rail for downstream LDOs and digital logic. Use Value: 60-V input rating withstands load-dump transients; 0.5-A output supports concurrent peripheral operation; SOIC-8 footprint enables compact PCB layout. | Use Scenario: Generating stable 5-V supply for CAN transceivers and EEPROM in under-hood ECUs exposed to ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: High-reliability step-down converter operating in continuous conduction mode with thermal shutdown for fault containment. Use Value: Guaranteed 0.5-A output across −40°C to +125°C; ±4% output tolerance maintains CAN bus timing margins; 85-μA standby current reduces quiescent drain during sleep mode. |
| Programmable Logic Controller (PLC) I/O Module | Industrial IoT Gateway Power |
Use Scenario: Converting 48-V DC distribution bus to 5-V rail for FPGA configuration, Ethernet PHY, and opto-isolator drivers in modular PLC backplanes. IC Role / Device Role / Timing Role: Nonsynchronous buck regulator serving as first-stage conversion before precision LDOs clean noise-sensitive rails. Use Value: 150-kHz fixed frequency enables predictable EMI filtering; SOIC-8 package supports automated assembly; thermal shutdown prevents latch-up during field short-circuits. | Use Scenario: Providing 5-V power to Wi-Fi/BLE SoC, flash memory, and environmental sensors in edge gateway enclosures with limited airflow. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC converter enabling fanless operation via efficient heat dissipation through PCB copper. Use Value: 140–250 μA quiescent current minimizes self-heating; 95°C/W junction-to-ambient thermal resistance (PDIP) or 150°C/W (SOIC) supports derated 0.5-A operation in confined spaces. |
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/NOPB | Lower 40-V max input voltage; identical pinout, package, and electrical specs except VIN rating. | Suitable only for ≤40-V systems (e.g., 24-V industrial); cannot replace LM2594HVMX-5.0/NOPB in 48-V or load-dump scenarios. | Select when input never exceeds 40 V and cost sensitivity outweighs HV margin. |
| LMR36506RNXR | Synchronous buck, 3–65 V input, 0.6-A output, 2.1-MHz switching, integrated FETs, smaller solution size. | Enables higher efficiency (>90%), reduced EMI, and smaller inductors; requires different compensation and layout due to higher frequency. | Choose for new designs prioritizing efficiency, size, and modern topology - not drop-in compatible. |
Compared with LM2594MX-5.0/NOPB, the LM2594HVMX-5.0/NOPB adds 20-V input headroom critical for transient-heavy environments; compared with LMR36506RNXR, it offers proven reliability, simpler design, and lower component count at the expense of efficiency and footprint.
Availability
LM2594HVMX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, programmable logic controller I/O modules, and industrial IoT gateway power supplies requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2594HVMX-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 experience in high-reliability power conversion ICs.
The LM2594HV product line was designed for rugged, high-input-voltage DC-DC conversion in industrial, automotive, and telecom infrastructure where simplicity, thermal robustness, and long-term availability are essential.
FAQ
What is the maximum input voltage rating for LM2594HVMX-5.0/NOPB?
The LM2594HVMX-5.0/NOPB supports a maximum input voltage of 60 V, making it suitable for applications with high-voltage transients such as 48-V industrial buses or automotive load-dump conditions. This distinguishes it from the standard LM2594MX-5.0/NOPB, which is rated for 40 V max. Always observe absolute maximum ratings to avoid permanent damage to the LM2594HVMX-5.0/NOPB.
Does LM2594HVMX-5.0/NOPB require an external feedback resistor network?
No - the LM2594HVMX-5.0/NOPB is a fixed 5.0-V output variant with internal resistor divider; pin 4 (Feedback) is unused and left unconnected. Unlike the adjustable LM2594HVMX-ADJ version, the LM2594HVMX-5.0/NOPB delivers its regulated output without external programming components, simplifying design and improving accuracy stability.
How does the ON/OFF pin function on LM2594HVMX-5.0/NOPB?
The ON/OFF pin (pin 5) provides logic-level enable control: pulling it below ~1.3 V turns the LM2594HVMX-5.0/NOPB ON, while pulling it above ~1.3 V places it in low-quiescent standby mode (85 μA typical). If unused, the pin may be tied to ground to ensure always-on operation. This feature enables precise power sequencing in multi-rail systems using the LM2594HVMX-5.0/NOPB.
What package type is used for LM2594HVMX-5.0/NOPB?
The LM2594HVMX-5.0/NOPB is supplied in an 8-pin SOIC (D) surface-mount package with 4.90 mm × 3.91 mm body dimensions and standard JEDEC MS-012AC outline. This package supports automated assembly and provides adequate thermal performance for 0.5-A operation when mounted on a 4-layer PCB with proper copper pour, as specified in the LM2594HVMX-5.0/NOPB thermal data.
Is LM2594HVMX-5.0/NOPB RoHS compliant and lead-free?
Yes - the /NOPB suffix explicitly indicates that LM2594HVMX-5.0/NOPB is lead-free and RoHS compliant per Texas Instruments' packaging standards. It meets EU Directive 2011/65/EU and is suitable for environmentally regulated industrial and consumer applications. Full compliance documentation is available in TI's official product change notices for the LM2594HVMX-5.0/NOPB.
LM2594HVMX-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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):
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2594HVMX-5.0/NOPB FAQ
1.How can I place an order for LM2594HVMX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2594HVMX-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 LM2594HVMX-5.0/NOPB reliable?
The price and inventory of LM2594HVMX-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 LM2594HVMX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2594HVMX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2594HVMX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2594HVMX-5.0/NOPB?
LM2594HVMX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2594HVMX-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 LM2594HVMX-5.0/NOPB?
For technical support, including LM2594HVMX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2594HVMX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2594HVMX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2594HVMX-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 LM2594HVMX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2594HVMX-5.0/NOPB?
All LM2594HVMX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2594HVMX-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 LM2594HVMX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2594HVMX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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