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Texas Instruments LM2597HVMX-5.0
- Part No.:
- LM2597HVMX-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2597HVMX-5.0.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,329
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Product details
Overview
LM2597HVMX-5.0 from Texas Instruments is a monolithic 150 kHz step-down (buck) switching voltage regulator delivering a fixed 5.0 V output at up to 0.5 A, with input voltage support up to 60 V, ±4% output voltage tolerance over line and load, and integrated soft-start/shutdown control. It targets industrial power conversion where high input voltage tolerance and minimal external components are required.
For engineers reviewing the LM2597HVMX-5.0 datasheet, LM2597HVMX-5.0 pinout, LM2597HVMX-5.0 application, or LM2597HVMX-5.0 equivalent, key selection considerations include its 60 V max input rating, 0.5 A regulated output capability, 150 kHz fixed-frequency operation enabling compact magnetics, and built-in thermal shutdown and current limiting for robust system-level power design.
Technical Context
The LM2597HVMX-5.0 integrates a 0.5 A N-channel DMOS switch, 150 kHz oscillator, internal frequency compensation, and feedback error amplifier in a single IC. Its HV variant supports up to 60 V input, enabling direct regulation from 48 V telecom or automotive battery rails without pre-regulation.
It employs standard buck topology with external catch diode, inductor, and input/output capacitors. The bias supply (VBS) pin improves efficiency at high VIN by powering internal circuitry independently, reducing quiescent current dependency on input voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures stable logic supply without external resistor network. |
| Max Input Voltage | 60 V - supports direct connection to 48 V systems and transient-tolerant industrial inputs. |
| Output Current | 0.5 A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Switching Frequency | 150 kHz fixed - enables use of low-cost, widely available 100–220 μH inductors and reduces EMI filtering complexity. |
| Quiescent Current | 140 μA typical in shutdown - minimizes standby power loss in battery-backed or energy-sensitive applications. |
| Efficiency | 82% at VIN = 12 V, IOUT = 0.5 A - balances thermal performance and board area vs. linear regulators in medium-power conversion. |
| Thermal Resistance | 150 °C/W (D package) - requires minimal copper pour for thermal management at full load in ambient ≤85 °C. |
Pinout & Package
LM2597HVMX-5.0 is housed in an 8-pin SOIC (D) surface-mount package (Package Number D0008A), optimized for automated assembly and moderate power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts 4.5 V to 60 V DC; requires local 47–68 μF low-ESR input capacitor for stability and ripple suppression. |
| OUT | Switch Node | Drives external catch diode and inductor; high dv/dt node requiring short PCB traces and ground shielding. |
| GND | Power & Signal Ground | Common return for input, output, and internal circuits; must be low-impedance plane adjacent to IC footprint. |
| FB | Feedback Input | Not used in fixed-output LM2597HVMX-5.0; internally connected to output divider - leave unconnected. |
| SD/SS | Shutdown/Soft-Start Control | Pulled low (≤0.6 V) disables regulator; open or ≥2 V enables with 1.6 μA soft-start current for controlled ramp-up. |
| FLAG | Error Flag Output | Open-drain active-low signal indicating output undervoltage (≤92% nominal); sinks 3 mA when asserted. |
| DELAY | Flag Delay Control | Adjusts flag response time via external capacitor; 1.25 V threshold sets delay timing for transient immunity. |
| VBS | Bias Supply Input | Provides dedicated 2–4.4 V supply for internal circuitry; improves efficiency and reduces IQ at high VIN. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.5 A DMOS Switch | Eliminates need for external MOSFET and gate driver, reducing BOM count and layout complexity. |
| 60 V Absolute Max Input Rating | Enables single-stage conversion from 48 V industrial buses without front-end buck or Zener clamping. |
| VBS Bias Supply Pin | Decouples internal logic supply from VIN, maintaining low 140 μA shutdown current even at 60 V input. |
| Out-of-Regulation FLAG with Adjustable Delay | Provides system-level fault signaling with programmable immunity to brief load transients via external capacitor. |
| Thermal Shutdown + Two-Stage Current Limit | Protects against sustained overload and short-circuit conditions without external sensing components. |
Applications
| Industrial 48 V DC-DC Conversion | Automotive Body Control Module Supply |
|---|---|
Use Scenario: Converting 48 V rail to 5 V for PLC I/O modules, sensor interfaces, and communication gateways in factory automation. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 5 V supply with high input voltage tolerance and fault reporting. Use Value: Eliminates need for cascaded converters, reducing component count and improving overall system efficiency by ~12% vs. two-stage 48 V → 12 V → 5 V designs. | Use Scenario: Powering microcontroller, CAN transceiver, and EEPROM in body control units exposed to 12 V/24 V battery variations and load dump transients. IC Role / Device Role / Timing Role: Main 5 V power source with 60 V input rating handling ISO 7637-2 pulse 5a (75 V/100 ms) without derating. Use Value: Maintains regulation during cold-crank (down to 4.5 V) and load dump events, ensuring uninterrupted MCU operation without external TVS or LDO post-regulation. |
| Telecom Remote Radio Unit (RRU) Bias Supply | Test Equipment Auxiliary Power Rail |
Use Scenario: Generating stable 5 V for FPGA configuration, ADC reference, and RF front-end bias in outdoor 48 V-powered RRUs. IC Role / Device Role / Timing Role: High-reliability buck converter operating continuously at −40 °C to +85 °C with thermal shutdown protection. Use Value: Achieves >80% efficiency across full temperature range, minimizing heat buildup in sealed enclosures and extending thermal margin by 15 °C vs. linear solutions. | Use Scenario: Providing clean, well-regulated 5 V for digital logic and analog subsystems in benchtop test instruments with multi-rail power requirements. IC Role / Device Role / Timing Role: Secondary regulated supply derived from main 24 V or 48 V system rail, featuring soft-start to prevent inrush-induced voltage droop. Use Value: Soft-start current of 1.6 μA ensures controlled 5 V ramp within 5 ms, preventing false resets in downstream logic during power-up sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2597MX-5.0 | Lower 40 V max input rating; identical pinout, features, and 5 V output spec. | Suitable only for ≤36 V systems; not rated for 48 V telecom or industrial bus inputs. | Select when input never exceeds 40 V and cost sensitivity outweighs HV margin. |
| LM2678-5.0 | Higher 5 A output current, 260 kHz switching, different pinout, no VBS or FLAG pins. | Requires redesign of PCB layout and external compensation; better for high-current loads but lacks fault signaling. | Choose for >0.5 A loads or higher efficiency at 12 V input; avoid if FLAG monitoring or 60 V operation is required. |
Compared with LM2597MX-5.0, the LM2597HVMX-5.0 adds 20 V input headroom critical for 48 V systems; versus LM2678-5.0, it trades current capacity for integrated fault reporting and simpler layout-making it optimal for space-constrained, fault-aware 0.5 A applications.
Availability
LM2597HVMX-5.0 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and telecom infrastructure requiring stable component supply with long-term lifecycle assurance.
Supply support for LM2597HVMX-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 expertise in switching regulator design.
The LM2597HV product line delivers rugged, easy-to-use buck regulators targeting high-input-voltage applications such as industrial controls, telecom power, and automotive subsystems where reliability and minimal external components are essential.
FAQ
What is the maximum input voltage rating for the LM2597HVMX-5.0?
The LM2597HVMX-5.0 has an absolute maximum input voltage rating of 60 V, with specified operating range from 4.5 V to 60 V. This HV rating distinguishes it from the standard LM2597MX-5.0 (40 V max) and enables direct regulation from 48 V systems. Exceeding 60 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does the LM2597HVMX-5.0 require external feedback resistors to set the output voltage?
No. The LM2597HVMX-5.0 is a fixed-output variant with internal resistor divider configured for 5.0 V. The FB pin is not connected externally and must remain unpopulated. Using external resistors would disrupt regulation and is incompatible with this part number - only the adjustable LM2597HVMX-ADJ version supports external feedback networks.
How does the VBS pin improve efficiency in the LM2597HVMX-5.0?
The VBS pin supplies dedicated bias power to internal circuitry, decoupling it from the high VIN rail. At 60 V input, this reduces operating quiescent current from ~5 mA (without VBS) to ~2 mA, directly improving light-load efficiency. TI specifies VBS operates from 2 V to 4.4 V, so a simple resistive divider from VIN or local LDO is recommended for optimal performance.
Can the FLAG pin of the LM2597HVMX-5.0 be used without connecting the DELAY capacitor?
Yes. The FLAG pin functions as an open-drain error indicator without the DELAY capacitor, asserting low when output drops below 92% of nominal (i.e., <4.6 V). Adding a capacitor to DELAY introduces a programmable delay (via RC time constant) to prevent false triggering during brief load transients - but omission yields immediate fault response, which is valid for applications requiring fastest possible undervoltage detection.
What package type is used for the LM2597HVMX-5.0, and is it RoHS compliant?
The LM2597HVMX-5.0 uses an 8-pin SOIC (D) surface-mount package (TI Package Number D0008A), with 1.27 mm lead pitch and standard JEDEC MO-002AC dimensions. Per TI's official product folder and packaging documentation, this device is RoHS compliant and halogen-free, meeting IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3) for reflow compatibility.
LM2597HVMX-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
LM2597HVMX-5.0 FAQ
1.How can I place an order for LM2597HVMX-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2597HVMX-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 LM2597HVMX-5.0 reliable?
The price and inventory of LM2597HVMX-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 LM2597HVMX-5.0 is usually 5 days.
3.What payment methods are accepted for LM2597HVMX-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2597HVMX-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2597HVMX-5.0?
LM2597HVMX-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2597HVMX-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 LM2597HVMX-5.0?
For technical support, including LM2597HVMX-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2597HVMX-5.0 requirements.
6.How does Aetrix verify that LM2597HVMX-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2597HVMX-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 LM2597HVMX-5.0 meets industry standards.
7.What is the process for return or replacement of LM2597HVMX-5.0?
All LM2597HVMX-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2597HVMX-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 LM2597HVMX-5.0 part is unused and in its original packaging.
Return procedure for LM2597HVMX-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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