My Inquiry
My Account
Texas Instruments LM2594HVM-5.0/NOPB
- Part No.:
- LM2594HVM-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2594HVM-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,020
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2594HVM-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 4.5–60 V input range, 150-kHz fixed-frequency operation, ±4% output voltage tolerance, 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 LM2594HVM-5.0/NOPB datasheet, LM2594HVM-5.0/NOPB pinout, LM2594HVM-5.0/NOPB application, or LM2594HVM-5.0/NOPB equivalent, key selection criteria include HV input capability (60 V max), TTL-compatible ON/OFF control, 85 μA standby current, SOIC-8 package compatibility, and fixed 5-V output without external feedback resistors.
Technical Context
The LM2594HVM-5.0/NOPB integrates a PWM controller, power switch, oscillator, and error amplifier in a monolithic buck topology. Its internal 150-kHz oscillator enables predictable EMI behavior and simplifies filter design, while the two-stage current-limit circuit provides robust overload handling without external sensing.
It operates in discontinuous or continuous conduction mode depending on load and inductor selection, with self-protection features including thermal shutdown and overtemperature cutoff. The HV variant supports up to 60 V input, enabling direct connection to unregulated 48-V telecom or industrial bus rails without pre-regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over line/load/temperature - eliminates need for feedback resistor network and ensures stable rail for microcontrollers and analog circuitry. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-range industrial inputs including 24-V, 36-V, and 48-V systems without external LDO pre-regulation. |
| Max Output Current | 0.5 A DC - sufficient for powering multiple low-power peripherals or single-core MCUs with integrated analog functions. |
| Switching Frequency | 150 kHz (±15%) - balances efficiency and external component size; enables use of standard off-the-shelf 100–220 μH inductors. |
| Standby Quiescent Current | 85 μA typical - enables low-power sleep modes in battery-backed or energy-harvesting applications. |
| Thermal Shutdown Threshold | 150 °C junction - protects against sustained overload or poor heatsinking in enclosed enclosures. |
| ON/OFF Logic Threshold | 1.3 V (ON), 2.0 V (OFF) - compatible with 3.3-V and 5-V logic families without level-shifting circuitry. |
Pinout & Package
LM2594HVM-5.0/NOPB is supplied 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 | NC | No internal connection; must be soldered to PCB ground plane for optimal thermal transfer per TI recommendation. |
| 4 | Feedback | Internally tied to 5-V reference; unused in fixed-output version but must remain unconnected (not grounded). |
| 5 | ON/OFF | TTL-compatible enable input: <1.3 V = ON, >2.0 V = OFF; draws only 5–15 μA during shutdown. |
| 6 | Ground | Main power and signal return path; requires low-impedance connection to minimize switching noise coupling. |
| 7 | +VIN | Main input supply pin; requires local 68-μF tantalum or low-ESR electrolytic bypass capacitor to suppress transients. |
| 8 | Output | Internal NPN switch collector node; switches between ~−0.5 V and (+VIN − 1.2 V); connects to catch diode anode and inductor. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5-V output | Eliminates external feedback resistors, reducing BOM count and layout sensitivity while guaranteeing ±4% regulation across temperature and load. |
| HV input rating (60 V) | Enables direct interface with 48-V industrial buses or automotive cold-crank scenarios without upstream pre-regulators. |
| 150-kHz fixed oscillator | Provides deterministic switching frequency for EMI filtering and avoids subharmonic instability common in variable-frequency converters. |
| TTL shutdown with 85-μA IQ | Supports system-level power sequencing and ultra-low-power sleep states without external bias circuitry. |
| Integrated thermal/current protection | Prevents catastrophic failure under short-circuit or overheating conditions without requiring external fault-detection circuitry. |
Applications
| Industrial Sensor Node Power | 48-V Telecom Pre-regulator |
|---|---|
|
Use Scenario: Powering a wireless vibration sensor with MCU, ADC, and RF transceiver from a 48-V field bus. IC Role / Device Role / Timing Role: Primary buck regulator converting 48-V to stable 5-V rail; handles transient surges during motor startup. Use Value: 60-V input rating avoids need for discrete pre-regulator stage, reducing board area and component count by 30% versus dual-stage solutions. |
Use Scenario: Generating 5-V intermediate rail for downstream LDOs and digital logic in telecom shelf management units. IC Role / Device Role / Timing Role: High-reliability preregulator feeding multiple point-of-load converters; operates continuously at 40°C ambient. Use Value: 0.5-A output and 82% efficiency at 12-V input support multi-rail distribution while maintaining thermal margin below 95°C junction. |
| On-Board 5-V System Rail | Inverting −5-V Analog Supply |
|
Use Scenario: Providing clean 5-V supply for FPGA I/O banks and USB PHY in embedded control modules. IC Role / Device Role / Timing Role: Main system buck converter; synchronized via external clock not supported - operates autonomously at 150 kHz. Use Value: Fixed-output architecture ensures consistent startup timing and eliminates feedback loop tuning effort during qualification. |
Use Scenario: Generating isolated −5-V rail for op-amp biasing in precision instrumentation front-ends. IC Role / Device Role / Timing Role: Inverting buck-boost converter configured with external diodes and inductor; uses same 5-V fixed-output IC. Use Value: Leverages identical LM2594HVM-5.0/NOPB die for both positive and negative rails, simplifying inventory and validation across dual-polarity designs. |
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 | Standard-voltage version (4.5–40 V input); lacks HV rating; otherwise identical pinout, specs, and SOIC-8 package. | Suitable only for ≤40 V input systems; not rated for 48-V industrial or telecom applications. | Select LM2594MX-5.0/NOPB only when input never exceeds 40 V and cost is prioritized over voltage margin. |
| LMR36506RNXR | Synchronous buck converter (3–65 V), 0.6-A, 2.1-MHz, 92% peak efficiency, integrated MOSFETs, smaller solution size. | Requires different layout, no external diode needed, higher frequency demands tighter layout; not drop-in compatible. | Choose LMR36506RNXR for new designs targeting higher efficiency, smaller footprint, and reduced BOM - not for LM2594HVM-5.0/NOPB replacement. |
Compared with LM2594HVM-5.0/NOPB, LM2594MX-5.0/NOPB offers identical functionality at lower cost but sacrifices 20-V input headroom, while LMR36506RNXR delivers superior efficiency and integration at the expense of pinout compatibility and increased design complexity.
Availability
LM2594HVM-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, telecom power subsystems, and embedded sensor node designs requiring stable component supply with long-term manufacturability.
Supply support for LM2594HVM-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, embedded processing, and power management technologies, with decades of experience in reliable power conversion ICs.
The LM2594HV product line was designed for rugged industrial and telecom applications demanding wide-input-voltage step-down regulation without complex external circuitry or thermal derating.
FAQ
What is the maximum input voltage rating for LM2594HVM-5.0/NOPB?
The LM2594HVM-5.0/NOPB supports an absolute maximum input voltage of 60 V, confirmed in Section 7.1 Absolute Maximum Ratings of the official datasheet. This HV rating distinguishes it from the standard LM2594 (40 V max) and enables direct use with 48-V industrial buses. Operation above 40 V requires the HV variant; using LM2594MX-5.0/NOPB in such systems risks permanent damage. The device maintains full 0.5-A output capability across its entire 4.5–60 V operating range.
Does LM2594HVM-5.0/NOPB require external feedback resistors to set the output voltage?
No, LM2594HVM-5.0/NOPB does not require external feedback resistors. As a fixed 5-V output variant, its feedback node is internally connected to a precision 5-V reference, eliminating the need for external resistor dividers. Pin 4 (Feedback) is unused and must be left floating - grounding or connecting it externally will disrupt regulation. This simplifies layout, improves reliability, and ensures ±4% output accuracy across temperature and load without calibration.
Can LM2594HVM-5.0/NOPB be used in an inverting configuration to generate −5 V?
Yes, LM2594HVM-5.0/NOPB can be configured as an inverting regulator to produce −5 V, as documented in Figure 8-5 of the datasheet. This requires external diodes (D1, D3), an inductor, and careful grounding of the IC's ground pin to the negative output. The 60-V input rating allows safe operation with input-to-output differential voltages up to 60 V, making it suitable for generating −5 V from 24-V or 48-V sources. Startup current peaks near 0.8 A, so input capacitance must be sized accordingly.
What is the quiescent current of LM2594HVM-5.0/NOPB in shutdown mode?
In shutdown mode (ON/OFF pin held >2.0 V), LM2594HVM-5.0/NOPB draws 85 μA typical standby quiescent current, per Section 7.9 Electrical Characteristics. This value is measured at TJ = 25°C with VIN = 60 V and is guaranteed to remain ≤250 μA across the full −40°C to +125°C junction temperature range. This ultra-low shutdown current supports battery-powered systems requiring months of standby life without significant drain.
Is LM2594HVM-5.0/NOPB pin-compatible with other LM2594 variants?
Yes, LM2594HVM-5.0/NOPB is pin-compatible with all other LM2594xx variants in the SOIC-8 (D) package, including LM2594MX-5.0/NOPB, LM2594HVM-3.3/NOPB, and LM2594HVM-12/NOPB. Pin functions, spacing, thermal pad requirements, and PCB footprint are identical. However, the HV and standard versions differ in maximum input voltage rating (60 V vs. 40 V), and fixed-output variants share the same pinout but cannot be interchanged without verifying input voltage compliance.
LM2594HVM-5.0/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):
- 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/NOPB FAQ
1.How can I place an order for LM2594HVM-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2594HVM-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 LM2594HVM-5.0/NOPB reliable?
The price and inventory of LM2594HVM-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 LM2594HVM-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2594HVM-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2594HVM-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2594HVM-5.0/NOPB?
LM2594HVM-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2594HVM-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 LM2594HVM-5.0/NOPB?
For technical support, including LM2594HVM-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2594HVM-5.0/NOPB requirements.
6.How does Aetrix verify that LM2594HVM-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2594HVM-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 LM2594HVM-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2594HVM-5.0/NOPB?
All LM2594HVM-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2594HVM-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 LM2594HVM-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2594HVM-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2594HVM-5.0/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
