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Texas Instruments LM2594HVN-5.0/NOPB
- Part No.:
- LM2594HVN-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2594HVN-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:271
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Product details
Overview
LM2594HVN-5.0/NOPB from Texas Instruments is a nonsynchronous step-down DC-DC converter IC delivering 5 V at up to 0.5 A, with input voltage support up to 60 V, ±4% output voltage tolerance over line and load, 150-kHz fixed-frequency operation, and thermal/current-limit protection. It serves as a primary buck regulator in industrial power supplies requiring high-input-voltage resilience.
For engineers reviewing the LM2594HVN-5.0/NOPB datasheet, LM2594HVN-5.0/NOPB pinout, LM2594HVN-5.0/NOPB application, or LM2594HVN-5.0/NOPB equivalent, key selection criteria include HV input rating (60 V), fixed 5-V output, SOIC-8 package compatibility, TTL shutdown capability, and 85 μA standby current - all critical for ruggedized embedded power design.
Technical Context
The LM2594HVN-5.0/NOPB integrates a PWM controller, power switch, oscillator, and feedback comparator in a single monolithic IC. Its architecture uses external diode, inductor, and capacitors to implement a standard buck topology with discontinuous or continuous conduction mode operation.
It features internal frequency compensation, undervoltage lockout (UVLO) inherent to HV version startup behavior, and a dedicated ON/OFF pin enabling logic-level shutdown with 1.3 V threshold. The feedback loop senses output via internal 5-V reference, eliminating external resistor dividers for fixed-output variants.
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 downstream logic or analog circuitry 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 microcontrollers, sensors, or interface ICs in space-constrained designs. |
| Switching Frequency | 150 kHz (±15%) - enables use of low-cost, standard off-the-shelf inductors and reduces EMI filtering complexity. |
| Standby Current | 85 μA typical - minimizes system power draw during sleep or fault states in battery-backed applications. |
| Thermal Protection | Internal overtemperature shutdown - prevents damage under sustained overload or poor heatsinking conditions. |
| Current Limit | 0.65–1.3 A peak - provides robust short-circuit protection while allowing safe inrush during cold start. |
Pinout & Package
LM2594HVN-5.0/NOPB is housed in an 8-pin SOIC (D) package with 4.90 mm × 3.91 mm body size and standard surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | No Connection | Internally unconnected; must be soldered to PCB ground plane for thermal relief but carry no signal. |
| 4 | Feedback | Not used in fixed 5-V version; internally tied to reference - leave floating or grounded per layout best practice. |
| 5 | ON/OFF | Logic-controlled shutdown input; <1.3 V = ON, >1.3 V = OFF - enables system-level power sequencing. |
| 6 | Ground | Main power and signal return path - requires low-impedance connection to minimize noise coupling. |
| 7 | +VIN | Main input supply pin - requires local 68-μF tantalum bypass capacitor to handle high di/dt switching currents. |
| 8 | Output | Switch node - connects to external catch diode and inductor; high dv/dt demands minimal copper area to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5-V Output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity in cost-sensitive designs. |
| TTL-Compatible Shutdown | Enables direct interfacing with MCU GPIOs or system supervisors without level-shifting circuitry. |
| Only Four External Components | Requires only diode, inductor, input cap, and output cap - accelerates prototyping and lowers design risk. |
| Internal Compensation | Removes need for external compensation network, simplifying stability tuning across operating conditions. |
| High-Efficiency Operation | 82% typical efficiency at 12-V input/0.5-A load - reduces thermal load and improves power density in enclosed systems. |
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 non-synchronous buck regulator providing isolated, regulated 5-V rail for digital subsystems. Use Value: 60-V input rating withstands load-dump events; 85-μA standby current extends battery life during vehicle sleep mode. | Use Scenario: Generating 5-V supply for CAN controller and EEPROM in a junction box exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Fixed-output step-down converter operating across −40°C to +125°C ambient with no external trim components. Use Value: ±4% output tolerance ensures reliable logic-level compliance over full temperature range without recalibration. |
| Programmable Logic Controller I/O Card | Telecom Remote Radio Unit |
Use Scenario: Converting 48-V DC distribution bus to 5-V for FPGA configuration and peripheral drivers on modular I/O boards. IC Role / Device Role / Timing Role: High-input-voltage buck regulator supporting hot-swap and brownout recovery in DIN-rail mounted PLCs. Use Value: 150-kHz switching frequency allows compact magnetics and predictable EMI profile for CE-compliant enclosure design. | Use Scenario: Providing 5-V bias for RF front-end amplifiers and ADCs in outdoor base station radios powered from −48-V telecom supply. IC Role / Device Role / Timing Role: Pre-regulator stepping −48-V to 5-V via inverting topology (using LM2594HVN-5.0/NOPB in inverted configuration). Use Value: Internal 1.23-V feedback reference enables precise negative rail generation; ON/OFF pin supports remote power cycling. |
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 | Same architecture and pinout, but rated for 40-V max input (non-HV variant) | Not suitable for >40-V input rails; lower thermal margin in high-VIN applications | Select LM2594HVN-5.0/NOPB when input may exceed 40 V; otherwise LM2594MX-5.0/NOPB offers identical functionality at lower cost. |
| LMR36506RNXR | Synchronous buck, 3–65 V input, 0.6-A, integrated FETs, 2.1-MHz switching | Higher efficiency (>90%), smaller solution size, but requires different layout and control loop design | Choose LMR36506RNXR for new designs prioritizing efficiency and board area; LM2594HVN-5.0/NOPB remains optimal for legacy compatibility and simplicity. |
Compared with LM2594MX-5.0/NOPB, LM2594HVN-5.0/NOPB adds 20-V headroom for transient-tolerant operation; versus LMR36506RNXR, it trades higher efficiency and integration for proven reliability, minimal external parts, and straightforward thermal management in existing SOIC footprints.
Availability
LM2594HVN-5.0/NOPB 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 high-input-voltage conditions.
Supply support for LM2594HVN-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 and embedded processing technologies, with decades of expertise in power management ICs.
The LM2594HV product line delivers rugged, easy-to-use step-down regulators targeting industrial, automotive, and telecom applications where high input voltage, reliability, and minimal external components are essential.
FAQ
What is the maximum input voltage rating for LM2594HVN-5.0/NOPB?
The LM2594HVN-5.0/NOPB supports a maximum input voltage of 60 V, as confirmed in the Absolute Maximum Ratings table and Recommended Operating Conditions section of the official datasheet. This HV rating distinguishes it from the standard LM2594MX-5.0/NOPB (40 V max) and enables use in applications with high transient voltages such as automotive load-dump or industrial 48-V systems. Exceeding 60 V risks permanent device damage.
Does LM2594HVN-5.0/NOPB require external feedback resistors to set its output voltage?
No, LM2594HVN-5.0/NOPB does not require external feedback resistors. As a fixed 5.0-V output variant, it integrates the feedback divider internally. Pin 4 (Feedback) is unused and may be left floating or grounded per layout guidelines. This eliminates resistor tolerance errors and simplifies design - a key advantage over adjustable versions like LM2594HVK-ADJ/NOPB, which require two external resistors to program VOUT.
What package type is used for LM2594HVN-5.0/NOPB, and is it RoHS compliant?
LM2594HVN-5.0/NOPB is supplied in an 8-pin SOIC (D) package with 4.90 mm × 3.91 mm body size and is RoHS compliant and lead-free, as indicated by the "/NOPB" suffix per Texas Instruments' packaging nomenclature. The "N" denotes lead-free finish, and "OPB" confirms exemption from certain RoHS substance restrictions is not claimed - meaning full compliance with EU Directive 2011/65/EU.
How does the ON/OFF pin function on LM2594HVN-5.0/NOPB?
The ON/OFF pin (Pin 5) of LM2594HVN-5.0/NOPB provides logic-level shutdown control: pulling it below ~1.3 V (vs. GND) enables regulation, while pulling it above ~1.3 V disables switching and reduces quiescent current to 85 μA typical. It accepts voltages up to 25 V and draws only 5–15 μA, enabling direct drive from microcontrollers or system supervisors without buffering. If unused, tie to GND to ensure always-on operation.
Can LM2594HVN-5.0/NOPB be used in an inverting (positive-to-negative) configuration?
Yes, LM2594HVN-5.0/NOPB can be configured as a positive-to-negative inverter - for example, generating −5 V from a +12-V input - by re-biasing the GND pin to the output rail and grounding the FB pin. TI's datasheet Figure 8-5 documents this topology explicitly for LM2594-5 variants. Critical considerations include using a Schottky catch diode, selecting appropriate input/output capacitance, and adding D3 to clamp positive output overshoot during startup.
LM2594HVN-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LM2594HVN-5.0/NOPB FAQ
1.How can I place an order for LM2594HVN-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2594HVN-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 LM2594HVN-5.0/NOPB reliable?
The price and inventory of LM2594HVN-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 LM2594HVN-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2594HVN-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2594HVN-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2594HVN-5.0/NOPB?
LM2594HVN-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2594HVN-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 LM2594HVN-5.0/NOPB?
For technical support, including LM2594HVN-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2594HVN-5.0/NOPB requirements.
6.How does Aetrix verify that LM2594HVN-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2594HVN-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 LM2594HVN-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2594HVN-5.0/NOPB?
All LM2594HVN-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2594HVN-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 LM2594HVN-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2594HVN-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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