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Texas Instruments LM2594HVM-5.0
- Part No.:
- LM2594HVM-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2594HVM-5.0.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,063
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Product details
Overview
LM2594HVM-5.0 from Texas Instruments is a nonsynchronous step-down DC-DC converter IC designed for high-input-voltage industrial and automotive power supplies. It delivers 0.5-A regulated 5.0-V output from input voltages up to 60 V, features 150-kHz fixed-frequency operation, ±4% output voltage accuracy over line/load/temperature, and integrated thermal shutdown and current-limit protection. It is used in on-card switching regulators requiring robust input transient tolerance.
For engineers reviewing the LM2594HVM-5.0 datasheet, LM2594HVM-5.0 pinout, LM2594HVM-5.0 application, or LM2594HVM-5.0 equivalent, key selection criteria include input voltage range (4.5–60 V), output current capability (0.5 A), quiescent current in standby (85 μA), oscillator frequency tolerance (±15%), and SOIC-8 package compatibility with standard PCB layout practices.
Technical Context
The LM2594HVM-5.0 implements a monolithic buck topology with an internal NPN switch, fixed 150-kHz oscillator, and voltage-mode control loop. Its feedback pin senses output via internal 1.23-V reference, enabling precise regulation without external resistors for the 5.0-V fixed version.
It supports TTL-compatible ON/OFF control with 1.3-V threshold, operates in discontinuous conduction mode at light loads, and integrates two-stage current limiting-peak limit (~0.8 A) and foldback-to protect under short-circuit conditions while maintaining thermal safety up to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line, load, and temperature range - ensures stable logic supply without trimming. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-range industrial inputs including 24-V and 48-V rails with margin. |
| Max Output Current | 0.5 A DC - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Oscillator Frequency | 150 kHz ±15% - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity. |
| Standby Quiescent Current | 85 μA typical - minimizes battery drain in always-on monitoring circuits during shutdown. |
| Saturation Voltage | 1.1 V max at 0.5 A - defines minimum dropout and impacts efficiency at low VIN; requires careful thermal design in SOIC-8. |
| Feedback Reference | 1.23 V internal - eliminates external resistor divider for fixed-output versions, reducing BOM count and layout sensitivity. |
Pinout & Package
LM2594HVM-5.0 is supplied in an 8-pin SOIC (D) package with 4.90 mm × 3.91 mm body size and standard 1.27-mm lead pitch. Thermal resistance is 150°C/W junction-to-ambient on JEDEC 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | No Connection | Internally unconnected; must be soldered to PCB ground plane for thermal relief only. |
| 4 | Feedback | Not used in LM2594HVM-5.0 (fixed 5-V version); tied internally to output divider - leave floating or connect to GND per layout best practice. |
| 5 | ON/OFF | TTL-compatible enable input; <1.3 V = ON, >1.3 V = OFF; pulls total supply current to ~85 μA in shutdown. |
| 6 | Ground | Power and signal reference return; requires low-impedance connection to minimize noise coupling into feedback path. |
| 7 | +VIN | Main input supply pin; requires local 68-μF tantalum or low-ESR ceramic bypass capacitor within 5 mm. |
| 8 | Output | Switch node; connects to external catch diode anode and inductor; high dv/dt demands minimal copper area to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated thermal shutdown | Activates at ~150°C junction temperature and latches off until thermal recovery - prevents permanent damage during overload or poor heatsinking. |
| Two-stage current limiting | Peak limit (~0.8 A) followed by foldback reduces power dissipation during sustained short-circuit - extends safe operating time without external circuitry. |
| Fixed-frequency oscillator | 150-kHz operation enables predictable EMI spectrum and simplifies filter design versus variable-frequency alternatives. |
| Low-component-count design | Requires only four external parts: input capacitor, output capacitor, inductor, and catch diode - accelerates prototyping and reduces BOM cost. |
| Wide-input HV capability | 60-V absolute maximum rating supports 48-V industrial buses and automotive cold-crank transients up to 60 V. |
Applications
| Industrial Sensor Node Power | Automotive Body Control Module |
|---|---|
Use Scenario: Powering 3.3-V microcontroller, analog front-end, and CAN transceiver from a 24-V vehicle battery with load-dump transients. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24-V nominal (up to 60-V transient) to stable 5.0-V rail for downstream LDOs and digital logic. Use Value: 60-V input rating withstands ISO 7637-2 pulse 5a (load dump), and 85-μA standby current enables low-power sleep modes without auxiliary bias supply. | Use Scenario: On-board 5-V supply for door module MCU and window motor driver logic in 12-V/24-V dual-voltage commercial vehicles. IC Role / Device Role / Timing Role: Buck converter providing isolated 5-V rail with ON/OFF control synchronized to vehicle ignition state. Use Value: TTL-compatible enable allows direct connection to microcontroller GPIO; ±4% output accuracy ensures reliable I²C/SPI communication without recalibration. |
| Programmable Logic Controller I/O Card | Outdoor Telecom Remote Unit |
Use Scenario: Generating 5-V logic supply on DIN-rail mounted PLC I/O card powered from 48-V DC distribution bus. IC Role / Device Role / Timing Role: High-efficiency preregulator feeding multiple LDOs for analog and digital subsystems. Use Value: 82% efficiency at 12-V input/0.5-A load reduces thermal load on densely packed PCB; SOIC-8 footprint allows standard automated assembly. | Use Scenario: Powering remote radio unit FPGA, RF synthesizer, and Ethernet PHY from solar-charged 48-V battery bank with wide temperature range (-40°C to +85°C). IC Role / Device Role / Timing Role: Main DC-DC stage delivering regulated 5-V rail with guaranteed operation across full industrial temperature range. Use Value: Specified performance over -40°C to +125°C junction temperature ensures reliability in uncooled outdoor enclosures; 150-kHz switching avoids critical RF bands. |
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 pinout, but rated for 40-V max input (not 60 V); lower thermal resistance (95°C/W in PDIP) but larger package. | Not suitable for 48-V systems with transients exceeding 40 V; preferred only where space allows PDIP and input stays ≤40 V. | Select LM2594HVM-5.0 when input transients exceed 40 V; choose LM2594MX-5.0 only for cost-sensitive 24-V-only designs with ample board area. |
| LMR36506RNXR | Synchronous buck with 3–65-V input, 0.6-A output, 2.1-MHz switching, and integrated MOSFETs - no external diode required. | Enables smaller solution size and higher efficiency (>90%), but requires more complex layout and lacks direct pin compatibility. | Choose LMR36506RNXR for new designs prioritizing size/efficiency; retain LM2594HVM-5.0 for legacy SOIC-8 layouts, 60-V transient immunity, or diode-based cost optimization. |
Compared with LM2594MX-5.0, LM2594HVM-5.0 provides 20-V higher input tolerance critical for 48-V industrial systems, while compared with LMR36506RNXR, it offers proven SOIC-8 drop-in replacement capability without redesigning magnetics or gate-drive paths.
Availability
LM2594HVM-5.0 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, and programmable logic controller I/O cards requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2594HVM-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 LM2594HV product line was designed specifically for ruggedized step-down regulation in industrial and transportation systems where input voltage can exceed 40 V - emphasizing fault tolerance, thermal robustness, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM2594HVM-5.0?
The LM2594HVM-5.0 has an absolute maximum input voltage rating of 60 V, with recommended operating range from 4.5 V to 60 V. This makes it suitable for 48-V industrial buses and automotive applications subject to load-dump transients. Operation above 60 V risks permanent damage, and the device includes internal protection to prevent latch-up under brief overvoltage events.
Does LM2594HVM-5.0 require an external feedback resistor network?
No, LM2594HVM-5.0 does not require external feedback resistors because it is a fixed 5.0-V output version. The internal feedback divider is trimmed to 1.23 V reference, eliminating BOM components and layout sensitivity. Pin 4 (Feedback) is unused and may be left floating or grounded per TI layout guidelines - unlike the adjustable LM2594HV-ADJ variant.
Can LM2594HVM-5.0 be used in an inverting (positive-to-negative) configuration?
Yes, LM2594HVM-5.0 can be configured as a positive-to-negative inverter, generating −5 V from a positive input. However, this requires bootstrapping the ground pin to the negative output and using additional diodes (D1, D3) per Figure 8-5 in the datasheet. The ON/OFF threshold shifts to ~13 V in this topology, and startup current peaks near 0.8 A - requiring careful input capacitor sizing.
What thermal considerations apply to LM2594HVM-5.0 in SOIC-8 package?
LM2594HVM-5.0 in SOIC-8 has a junction-to-ambient thermal resistance of 150°C/W on a JEDEC 4-layer board. At 0.5-A load and 24-V input, power dissipation exceeds 1 W - requiring either generous copper pour on layer 2/3, thermal vias under the exposed pad (if present), or derating above 70°C ambient. Thermal shutdown activates at ~150°C junction temperature and holds until cooldown.
Is LM2594HVM-5.0 pin-compatible with other LM2594xx variants?
Yes, LM2594HVM-5.0 shares identical SOIC-8 pinout and function mapping with all LM2594xx family members, including LM2594MX-5.0 (40-V version) and LM2594HVM-ADJ (adjustable version). Pin 4 (Feedback) is internally connected to the output divider in fixed versions and unused in adjustable versions - allowing direct PCB reuse across variants with only BOM changes.
LM2594HVM-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2594HVM-5.0 FAQ
1.How can I place an order for LM2594HVM-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2594HVM-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 LM2594HVM-5.0 reliable?
The price and inventory of LM2594HVM-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 LM2594HVM-5.0 is usually 5 days.
3.What payment methods are accepted for LM2594HVM-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2594HVM-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2594HVM-5.0?
LM2594HVM-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2594HVM-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 LM2594HVM-5.0?
For technical support, including LM2594HVM-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2594HVM-5.0 requirements.
6.How does Aetrix verify that LM2594HVM-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2594HVM-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 LM2594HVM-5.0 meets industry standards.
7.What is the process for return or replacement of LM2594HVM-5.0?
All LM2594HVM-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2594HVM-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 LM2594HVM-5.0 part is unused and in its original packaging.
Return procedure for LM2594HVM-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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