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Texas Instruments LM2594HVM-3.3/NOPB
- Part No.:
- LM2594HVM-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2594HVM-3.3/NOPB.pdf
- Description:
- IC REG BUCK 3.3V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,904
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Product details
Overview
LM2594HVM-3.3/NOPB from Texas Instruments is a nonsynchronous step-down DC-DC converter IC delivering 3.3 V at up to 0.5 A, with input voltage support up to 60 V, fixed 150-kHz switching frequency, 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 LM2594HVM-3.3/NOPB datasheet, LM2594HVM-3.3/NOPB pinout, LM2594HVM-3.3/NOPB application, or LM2594HVM-3.3/NOPB equivalent, key selection criteria include HV input rating (60 V), thermal shutdown protection, TTL-compatible ON/OFF control, low 85 μA standby current, and SOIC-8 package compatibility with standard PCB layout practices.
Technical Context
The LM2594HVM-3.3/NOPB integrates a PWM controller, power switch, oscillator, and feedback comparator in a monolithic buck topology. Its internal 150-kHz oscillator enables predictable EMI behavior, while the two-stage current-limit protection reduces switching frequency under overload to limit power dissipation.
It operates in continuous conduction mode by default but supports discontinuous mode at light loads via inductor selection. The feedback pin senses output voltage through an internal 1.23 V reference, and the ON/OFF pin provides logic-level shutdown with 1.3 V threshold and 85 μA standby current draw when asserted high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±4% over full line/load/temperature range - ensures stable MCU core supply without external resistor network. |
| Max Input Voltage | 60 V - supports wide-range industrial inputs including 48 V nominal systems with transients. |
| Output Current | 0.5 A DC - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Switching Frequency | 150 kHz ±15% - balances efficiency, inductor size, and EMI filtering requirements. |
| Quiescent Current | 140–250 μA - enables low-power operation in battery-backed or always-on monitoring circuits. |
| Standby Current | 85 μA - allows deep-sleep system states with minimal leakage during ON/OFF pin assertion. |
| Saturation Voltage | 0.9–1.2 V at 0.5 A - defines conduction loss and impacts thermal design margin at full load. |
| Thermal Protection | Internal overtemperature shutdown - prevents latch-up or damage during sustained overload or poor heatsinking. |
Pinout & Package
LM2594HVM-3.3/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 only. |
| 4 | Feedback | Input sensing node tied to output via resistive divider in adjustable versions; internally connected to 3.3 V regulation circuitry in this fixed version. |
| 5 | ON/OFF | Logic-level shutdown control: <1.3 V = ON, >1.3 V = OFF; draws ≤15 μA when active, 85 μA in standby. |
| 6 | Ground | Power and signal reference return path; requires low-impedance connection to minimize noise coupling. |
| 7 | +VIN | Main power input (4.5–60 V); requires local 68 μF tantalum or equivalent low-ESR capacitor for transient suppression. |
| 8 | Output | Switch node connecting internal NPN transistor collector; drives external catch diode and inductor; exhibits high dv/dt during switching. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3 V Output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity in space-constrained designs. |
| 60 V Input Rating | Enables direct integration into 48 V industrial bus systems without preregulation, simplifying power architecture. |
| TTL-Compatible Shutdown | Allows seamless interfacing with microcontroller GPIOs or system-level enable signals without level-shifting circuitry. |
| Internal Frequency Compensation | Removes need for external compensation components, accelerating design cycle and improving stability across operating conditions. |
| Thermal & Current Limit Protection | Provides self-recovery fault handling during short-circuit or overtemperature events without external supervision. |
| Standard Inductor Compatibility | Supports widely available off-the-shelf 100 μH inductors, lowering sourcing risk and procurement lead time. |
Applications
| Industrial Sensor Node Power | 48 V Fieldbus Interface Supply |
|---|---|
Use Scenario: Powering analog sensor front-ends and low-power MCUs in factory automation nodes exposed to 48 V DC fieldbus rails with voltage spikes. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting 48 V bus to clean 3.3 V for mixed-signal SoCs and ADCs. Use Value: Withstands 60 V max input and delivers ±4% regulated output, ensuring reliable operation during brownouts and surges common in industrial environments. | Use Scenario: Generating local 3.3 V supply for RS-485 transceivers and CAN controllers on programmable logic controllers (PLCs) with 48 V backplane power. IC Role / Device Role / Timing Role: Point-of-load converter providing isolated-domain logic supply with fast transient response to communication bursts. Use Value: 150-kHz fixed frequency enables predictable filter design, while 85 μA standby current supports low-power sleep modes between data transmissions. |
| Ruggedized IoT Gateway Power | Legacy Equipment Retrofit Supply |
Use Scenario: Replacing aging linear regulators in outdoor wireless gateways where ambient temperature exceeds 85°C and input varies from 36–57 V. IC Role / Device Role / Timing Role: High-efficiency switching regulator replacing inefficient 78xx series, reducing thermal load in sealed enclosures. Use Value: Internal thermal shutdown and 0.5 A capability sustain operation at 125°C junction temperature, extending product lifetime in thermally constrained deployments. | Use Scenario: Upgrading obsolete 24 V-to-3.3 V power stages in legacy test equipment where board space prohibits redesign but reliability must improve. IC Role / Device Role / Timing Role: Drop-in compatible replacement for LM2594-3.3 variants using same SOIC-8 footprint and external component values. Use Value: Pinout and electrical behavior match legacy LM2594-3.3 parts, enabling field upgrades without PCB rework or firmware changes. |
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-3.3/NOPB | Same architecture and specs, but rated for 40 V max input (non-HV variant). | Not suitable for 48 V bus systems; limited to 36 V nominal inputs. | Select only if input never exceeds 40 V and cost sensitivity outweighs HV margin. |
| LMR36506RNXR | Synchronous buck, 3–65 V input, 0.6 A, 2.1 MHz switching, integrated FETs. | Higher efficiency (>90%), smaller solution size, but requires different layout and compensation. | Choose for new designs prioritizing efficiency and compactness; not drop-in compatible due to different pinout and control scheme. |
Compared with LM2594HVM-3.3/NOPB, the LM2594MX-3.3/NOPB lacks HV input capability and cannot replace it in 48 V applications, while the LMR36506RNXR offers superior performance but demands full schematic and layout revision - making LM2594HVM-3.3/NOPB optimal for HV-retrofit and cost-sensitive industrial use cases.
Availability
LM2594HVM-3.3/NOPB is available at Aetrix Electronics and suitable for industrial sensor nodes, 48 V fieldbus interfaces, ruggedized IoT gateways, and legacy equipment retrofit programs requiring stable component supply across extended lifecycle windows.
Supply support for LM2594HVM-3.3/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 was designed specifically for industrial and automotive applications demanding robust 60 V input capability, simple external component count, and proven reliability in harsh operating environments.
FAQ
What is the maximum input voltage rating for LM2594HVM-3.3/NOPB?
The LM2594HVM-3.3/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 TI datasheet SNVS118F. This HV rating distinguishes it from the standard LM2594-3.3 variant (40 V max) and enables direct use with 48 V industrial buses. Exceeding 60 V risks permanent device damage.
Does LM2594HVM-3.3/NOPB require external compensation components?
No, LM2594HVM-3.3/NOPB features internal frequency compensation, eliminating the need for external capacitors or resistors in the feedback loop. This simplifies design, reduces BOM count, and improves stability across temperature and load variations - a key advantage over controllers requiring external compensation networks.
Can LM2594HVM-3.3/NOPB be used in an inverting (positive-to-negative) configuration?
Yes, LM2594HVM-3.3/NOPB can be configured as a positive-to-negative converter per Figure 8-5 in the datasheet. However, its fixed 3.3 V output limits inversion to −3.3 V; the adjustable version (LM2594HVM-ADJ) is recommended for other negative voltages. Critical design considerations include input-output voltage sum ≤60 V and use of Schottky or fast-recovery diodes.
What is the typical quiescent current of LM2594HVM-3.3/NOPB in normal operation?
The typical quiescent current of LM2594HVM-3.3/NOPB is 140–250 μA across the full operating temperature range, as specified in Section 7.9 of the datasheet. This value reflects current drawn during active regulation (not shutdown), enabling low-power operation in always-on monitoring systems without compromising regulation accuracy.
Is LM2594HVM-3.3/NOPB pin-compatible with other LM2594 variants in SOIC-8 package?
Yes, LM2594HVM-3.3/NOPB shares identical pinout and SOIC-8 package dimensions with all other LM2594xx variants (e.g., LM2594MX-3.3/NOPB, LM2594HVM-5.0/NOPB), as verified in the Pin Configuration and Functions section (Figure 6-1 and Table 6-1). This enables direct substitution within the same family when input voltage and output requirements align.
LM2594HVM-3.3/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):
- 3.3V
- 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-3.3/NOPB FAQ
1.How can I place an order for LM2594HVM-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2594HVM-3.3/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-3.3/NOPB reliable?
The price and inventory of LM2594HVM-3.3/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-3.3/NOPB is usually 5 days.
3.What payment methods are accepted for LM2594HVM-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2594HVM-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2594HVM-3.3/NOPB?
LM2594HVM-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2594HVM-3.3/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-3.3/NOPB?
For technical support, including LM2594HVM-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2594HVM-3.3/NOPB requirements.
6.How does Aetrix verify that LM2594HVM-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2594HVM-3.3/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-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM2594HVM-3.3/NOPB?
All LM2594HVM-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2594HVM-3.3/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-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM2594HVM-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2594HVM-3.3/NOPB Tags
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