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Texas Instruments LM2594HVM-12/NOPB
- Part No.:
- LM2594HVM-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2594HVM-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,479
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Product details
Overview
LM2594HVM-12/NOPB from Texas Instruments is a monolithic nonsynchronous step-down (buck) DC-DC switching regulator delivering 12 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 on-board power supply in industrial control modules requiring robust input voltage handling and minimal external components.
For engineers reviewing the LM2594HVM-12/NOPB datasheet, LM2594HVM-12/NOPB pinout, LM2594HVM-12/NOPB application, or LM2594HVM-12/NOPB equivalent, key selection criteria include HV input capability (60 V max), thermal shutdown protection, TTL-compatible ON/OFF control, 85 μA standby current, and SOIC-8 surface-mount packaging for automated assembly.
Technical Context
The LM2594HVM-12/NOPB integrates a PWM controller, power switch, oscillator, error amplifier, and thermal/current protection circuitry in a single die. Its internal 150-kHz oscillator enables predictable EMI behavior and simplifies filter design, while the fixed 12-V output eliminates external feedback resistors.
It operates in continuous conduction mode across its rated load range and features an internal current-limiting mechanism that reduces switching frequency under overload - not just hard current limiting - providing graceful degradation during fault conditions without latch-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over full temperature and load range - ensures stable rail for microcontrollers and analog circuitry without trimming. |
| Max Input Voltage | 60 V - supports wide-range industrial supplies including 48-V nominal systems with transients. |
| Output Current | 0.5 A DC - sufficient for powering multiple low-power ICs or sensors from a single regulator stage. |
| Switching Frequency | 150 kHz ±15% - balances efficiency, inductor size, and EMI filtering requirements. |
| Standby Current | 85 μA typical - enables low-power sleep modes in battery-backed or energy-conscious systems. |
| Thermal Shutdown | Active at ~150°C junction - prevents damage during sustained overload or poor heatsinking. |
| ON/OFF Threshold | 1.3 V logic level - compatible with standard CMOS/TTL outputs for system-level power sequencing. |
Pinout & Package
LM2594HVM-12/NOPB is supplied in an 8-pin SOIC (D) package with 4.90 mm × 3.91 mm body size and standard 1.27-mm pitch. The package includes exposed pad thermal enhancement per TI's recommended layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | No Connection | Internally unconnected; must be soldered to PCB ground plane for thermal conduction. |
| 4 | Feedback | Not used in fixed 12-V version; internally tied to output divider - leave floating or grounded per layout best practice. |
| 5 | ON/OFF | Logic-controlled enable: <1.3 V = ON, >1.3 V = OFF; draws <15 μA when active. |
| 6 | Ground | Power and signal reference; requires low-impedance connection to PCB ground plane. |
| 7 | +VIN | Main input supply (4.5–60 V); requires local 68-μF tantalum or equivalent low-ESR capacitor. |
| 8 | Output | Switch node - connects to external catch diode and inductor; high dV/dt requires minimized trace area. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 12-V Output | Eliminates external resistor network, reducing BOM count and improving long-term output stability. |
| 150-kHz Fixed Oscillator | Enables consistent EMI profile and predictable inductor sizing without frequency drift or spread-spectrum complexity. |
| TTL-Compatible Enable | Direct interface with MCU GPIO or system supervisor ICs without level-shifting circuitry. |
| Two-Stage Current Limit | Reduces switching frequency under overload instead of immediate shutdown - maintains partial regulation during transient faults. |
| Internal Compensation | Allows stable operation with standard off-the-shelf inductors and capacitors - no external compensation network required. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated digital I/O drivers and analog sensor interfaces in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary 12-V buck regulator supplying downstream LDOs and isolated gate drivers. Use Value: Withstands 60-V input transients common in 24-V industrial buses and maintains regulation during brownouts down to 4.5 V. | Use Scenario: Generating 12-V rail for microcontroller peripherals and CAN transceivers in vehicle door modules. IC Role / Device Role / Timing Role: On-card switching regulator replacing linear regulators to reduce heat and improve efficiency. Use Value: 85 μA standby current enables low-power wake-on-CAN functionality without compromising battery life. |
| Medical Diagnostic Sensor Hub | Outdoor Telecom Remote Unit |
Use Scenario: Providing clean 12-V supply to precision ADC front-ends and op-amp signal chains in portable diagnostic equipment. IC Role / Device Role / Timing Role: Efficient preregulator feeding low-noise LDOs for analog signal conditioning stages. Use Value: ±4% output tolerance and excellent line regulation ensure stable reference voltages across varying battery or adapter inputs. | Use Scenario: Converting 48-V telecom plant voltage to 12-V for RF amplifiers and monitoring circuitry in unshielded outdoor base station enclosures. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator with thermal shutdown for harsh ambient environments. Use Value: 150°C thermal shutdown and SOIC-8 package with thermal pad support reliable operation at −40°C to +125°C ambient. |
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-12/NOPB | Same architecture and pinout, but rated for 40-V max input (non-HV variant). | Suitable only for ≤40-V input systems; lacks transient robustness for 48-V industrial or telecom rails. | Select LM2594MX-12/NOPB only if input never exceeds 40 V and cost is prioritized over margin. |
| LMR36506RNXR | Synchronous buck, 3–65 V input, 0.6-A, 2.1-MHz switching, integrated FETs, smaller solution size. | Requires different layout, higher-frequency EMI filtering, and lacks direct pin compatibility. | Choose LMR36506RNXR for new designs needing higher efficiency (>90%), smaller footprint, and modern synchronous topology. |
Compared with LM2594HVM-12/NOPB, LM2594MX-12/NOPB offers identical functionality at lower cost but reduced input voltage margin, while LMR36506RNXR delivers superior efficiency and integration at the expense of redesign effort and non-drop-in replacement.
Availability
LM2594HVM-12/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply, long-lifecycle support, and proven reliability in harsh environments.
Supply support for LM2594HVM-12/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 over 90 years of innovation history.
The LM2594HV product line was designed for rugged, cost-sensitive DC-DC conversion in industrial, automotive, and telecom infrastructure where wide-input-voltage capability and minimal external components are critical.
FAQ
What is the maximum input voltage rating for LM2594HVM-12/NOPB?
The LM2594HVM-12/NOPB has a maximum input voltage rating of 60 V, confirmed in the Absolute Maximum Ratings table and explicitly designated as the "HV" (High Voltage) variant. This allows safe operation with 48-V nominal systems including transients and surges common in industrial and telecom applications. Operation above 60 V risks permanent damage.
Does LM2594HVM-12/NOPB require external feedback resistors?
No, LM2594HVM-12/NOPB does not require external feedback resistors because it is a fixed-output 12-V version. The feedback divider is fully internal, simplifying design and eliminating resistor tolerance and drift effects. Pin 4 (Feedback) is unused and may be left floating or grounded per TI's layout recommendations.
What package type is used for LM2594HVM-12/NOPB?
LM2594HVM-12/NOPB uses an 8-pin SOIC (D) package with dimensions 4.90 mm × 3.91 mm and 1.27-mm lead pitch. It is RoHS-compliant and features an exposed thermal pad for enhanced heat dissipation, as documented in TI's Mechanical, Packaging, and Orderable Information section.
How does the ON/OFF pin function on LM2594HVM-12/NOPB?
The ON/OFF pin (Pin 5) provides TTL-compatible enable control: pulling below 1.3 V (typical) turns the regulator ON, while pulling above 1.3 V shuts it down, reducing quiescent current to 85 μA. If unused, it can be tied directly to ground to maintain always-ON operation - no pull-up or pull-down resistors are required.
Is LM2594HVM-12/NOPB pin-compatible with other LM2594 variants?
Yes, LM2594HVM-12/NOPB is pin-compatible with all other LM2594xx variants in the same SOIC-8 package, including LM2594MX-12/NOPB and LM2594HVM-ADJ/NOPB. Pin functions, layout, and thermal pad placement are identical - only the internal feedback network differs between fixed and adjustable versions.
LM2594HVM-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 12V
- 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-12/NOPB FAQ
1.How can I place an order for LM2594HVM-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2594HVM-12/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 LM2594HVM-12/NOPB reliable?
The price and inventory of LM2594HVM-12/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2594HVM-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2594HVM-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2594HVM-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2594HVM-12/NOPB?
LM2594HVM-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2594HVM-12/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 LM2594HVM-12/NOPB?
For technical support, including LM2594HVM-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2594HVM-12/NOPB requirements.
6.How does Aetrix verify that LM2594HVM-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2594HVM-12/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 LM2594HVM-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2594HVM-12/NOPB?
All LM2594HVM-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2594HVM-12/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 LM2594HVM-12/NOPB part is unused and in its original packaging.
Return procedure for LM2594HVM-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2594HVM-12/NOPB Tags
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