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Texas Instruments LM2594HVMX-5.0
- Part No.:
- LM2594HVMX-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2594HVMX-5.0.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,756
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Product details
Overview
LM2594HVMX-5.0 from Texas Instruments is a monolithic nonsynchronous step-down (buck) 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 fixed 150-kHz switching frequency - used in industrial power supplies, automotive subsystems, and distributed point-of-load regulation.
For engineers reviewing the LM2594HVMX-5.0 datasheet, LM2594HVMX-5.0 pinout, LM2594HVMX-5.0 application, or LM2594HVMX-5.0 equivalent, key selection criteria include HV input capability (60 V max), TTL-compatible ON/OFF control, thermal shutdown protection, 85 μA standby current, and SOIC-8 surface-mount packaging for board space-constrained designs.
Technical Context
The LM2594HVMX-5.0 integrates a PWM controller, power switch, oscillator, and feedback comparator in a single chip. It operates in continuous conduction mode by default, supports discontinuous mode at light loads, and uses internal frequency compensation to eliminate external compensation components.
Its ON/OFF pin enables logic-level shutdown with 1.3 V threshold, and its feedback pin monitors output via internal 1.23 V reference. The device implements two-stage current limiting and thermal shutdown for fault protection, with saturation voltage of 1.1 V typical at 0.5 A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures stable rail for microcontrollers and analog circuitry without external resistor divider. |
| Max Input Voltage | 60 V - supports wide-input industrial and automotive battery-supplied systems including 24 V and 48 V nominal buses. |
| Output Current | 0.5 A DC - sufficient for powering small processors, sensors, and interface ICs without external boost stages. |
| Switching Frequency | 150 kHz ±15% - enables use of low-cost, standard off-the-shelf inductors and reduces EMI filtering complexity vs. MHz-range converters. |
| Quiescent Current | 140–250 μA (TJ = 25°C to 125°C) - minimizes no-load power loss in always-on subsystems such as CAN nodes or remote sensors. |
| Standby Current | 85 μA typical with ON/OFF pin high - allows deep-sleep operation while retaining fast wake-up response. |
| Thermal Protection | Internal thermal shutdown - prevents damage during sustained overload or poor heatsinking in enclosed enclosures. |
Pinout & Package
LM2594HVMX-5.0 is supplied in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, surface-mount package with exposed pad not present. Pin 1–3 are no-connect (NC) but require PCB soldering for thermal conduction; pins 4–8 define functional interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | No Connection | Internally unconnected; must be soldered to PCB copper for mechanical stability and thermal transfer. |
| 4 | Feedback | Input sensing node tied directly to output for fixed 5.0 V version - no external resistors required. |
| 5 | ON/OFF | Logic-level shutdown control: <1.3 V = ON, >1.3 V = OFF - compatible with MCU GPIO or open-collector drivers. |
| 6 | Ground | Power and signal reference return path - requires low-impedance connection to minimize noise coupling into feedback loop. |
| 7 | +VIN | Main power input - requires local 68 μF tantalum or equivalent low-ESR capacitor to handle pulsed switch current. |
| 8 | Output | Switch node connecting to external diode and inductor - high dv/dt node; PCB trace area must be minimized to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0 V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity in cost-sensitive applications. |
| TTL-compatible ON/OFF | Enables direct interfacing with 3.3 V or 5 V logic without level-shifting, simplifying system power sequencing. |
| 150-kHz fixed-frequency oscillator | Ensures predictable EMI profile and compatibility with standard inductor values, avoiding custom magnetics. |
| Thermal + current-limit protection | Provides autonomous fault recovery without external monitoring circuitry - critical for unattended industrial equipment. |
| Only four external components required | Reduces design time and failure points: input cap, output cap, inductor, and catch diode - ideal for rapid prototyping. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Converting 24 V truck battery to regulated 5 V for microcontroller and CAN transceiver. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, stabilized 5 V rail with HV input tolerance and thermal robustness. Use Value: Withstands load-dump transients up to 60 V and maintains regulation across −40°C to +125°C ambient. | Use Scenario: Powering door lock actuator logic and sensor interface in centralized body control unit. IC Role / Device Role / Timing Role: Point-of-load converter delivering clean 5 V from 12 V battery bus with low quiescent current. Use Value: 85 μA standby current extends battery life during vehicle sleep mode without compromising wake-up latency. |
| Programmable Logic Controller I/O Card | Outdoor IoT Sensor Node |
Use Scenario: Generating 5 V for digital I/O isolation and communication ICs on modular PLC backplane. IC Role / Device Role / Timing Role: Compact, rugged DC-DC stage replacing linear regulators to improve efficiency and reduce heat dissipation. Use Value: 82% efficiency at 12 VIN/0.5 AOUT cuts board temperature rise versus 7805-based solutions. | Use Scenario: Powering LoRaWAN transceiver and environmental sensors in solar-charged outdoor enclosure. IC Role / Device Role / Timing Role: Main power converter accepting variable 15–55 V PV input and delivering stable 5 V output. Use Value: 60 V absolute maximum input rating accommodates open-circuit PV voltage spikes without derating. |
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 | Lower max input voltage (40 V vs. 60 V); identical pinout, package, and electrical specs otherwise. | Suitable only for ≤40 V input systems (e.g., standard 24 V industrial rails without transients). | Select LM2594MX-5.0 when input never exceeds 40 V and cost is prioritized over transient margin. |
| LMR36506RNXR | Synchronous buck, 3–65 V input, 0.6 A, 2.1 MHz switching, integrated FETs - smaller solution size, higher efficiency (92%), but requires more external components. | Better suited for space-constrained, high-efficiency designs where PCB area and thermal performance are critical. | Choose LMR36506RNXR for new designs requiring >90% efficiency and minimal footprint; LM2594HVMX-5.0 remains optimal for legacy compatibility and simplicity. |
Compared with LM2594MX-5.0, LM2594HVMX-5.0 adds 20 V headroom for transient immunity; compared with LMR36506RNXR, it trades higher efficiency and frequency for lower BOM count, zero external compensation, and proven reliability in long-lifecycle industrial deployments.
Availability
LM2594HVMX-5.0 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and outdoor embedded systems requiring stable component supply, long-term lifecycle assurance, and extended temperature operation.
Supply support for LM2594HVMX-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 ICs.
The LM2594HVMX-5.0 belongs to TI's SIMPLE SWITCHER® family - designed specifically for ease-of-use, minimal external component count, and robust operation in harsh environments without requiring expert power design knowledge.
FAQ
What is the maximum input voltage rating for LM2594HVMX-5.0?
The LM2594HVMX-5.0 has an absolute maximum input voltage rating of 60 V, making it suitable for applications with high-voltage transients such as automotive load dump or industrial 48 V systems. Its recommended operating range is 4.5 V to 60 V, and exceeding 60 V risks permanent damage per Absolute Maximum Ratings.
Does LM2594HVMX-5.0 require external feedback resistors?
No, LM2594HVMX-5.0 does not require external feedback resistors because it is a fixed-output 5.0 V version. The internal feedback network is trimmed to deliver 5.0 V ±4% across line, load, and temperature - eliminating resistor selection, placement, and tolerance errors common in adjustable variants.
Can LM2594HVMX-5.0 be used in an inverting (positive-to-negative) configuration?
Yes, LM2594HVMX-5.0 can be configured as a positive-to-negative converter (e.g., +24 V to −5 V) using the inverting topology shown in TI's datasheet Figure 8-5. This requires re-referencing the ground and feedback pins, adding external diodes, and observing the 60 V total voltage limit across VIN and ground pins.
What is the typical efficiency of LM2594HVMX-5.0 at full load?
LM2594HVMX-5.0 achieves 82% typical efficiency at 12 V input and 0.5 A output load, as specified in Section 7.6 of the datasheet. Efficiency varies with input voltage and load - e.g., ~80% at 7 VIN, ~75% at 24 VIN - due to fixed switching losses and diode conduction characteristics.
Is LM2594HVMX-5.0 RoHS compliant and lead-free?
Yes, LM2594HVMX-5.0 is RoHS compliant and lead-free, packaged in a green SOIC-8 (D) package per TI's current manufacturing standards. The "MX" suffix denotes tape-and-reel packaging with Pb-free terminal finish, and full compliance documentation is available in TI's official product folder and material declarations.
LM2594HVMX-5.0 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:
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2594HVMX-5.0 FAQ
1.How can I place an order for LM2594HVMX-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2594HVMX-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 LM2594HVMX-5.0 reliable?
The price and inventory of LM2594HVMX-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 LM2594HVMX-5.0 is usually 5 days.
3.What payment methods are accepted for LM2594HVMX-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2594HVMX-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2594HVMX-5.0?
LM2594HVMX-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2594HVMX-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 LM2594HVMX-5.0?
For technical support, including LM2594HVMX-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2594HVMX-5.0 requirements.
6.How does Aetrix verify that LM2594HVMX-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2594HVMX-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 LM2594HVMX-5.0 meets industry standards.
7.What is the process for return or replacement of LM2594HVMX-5.0?
All LM2594HVMX-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2594HVMX-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 LM2594HVMX-5.0 part is unused and in its original packaging.
Return procedure for LM2594HVMX-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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