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Texas Instruments LM2597HVN-5.0
- Part No.:
- LM2597HVN-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2597HVN-5.0.pdf
- Description:
- IC REG BUCK 5V 500MA 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,297
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Product details
Overview
LM2597HVN-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 ±4% output voltage tolerance over line and load, input voltage range up to 60 V (HV version), and integrated soft-start/shutdown control. It targets industrial power conversion where compact size, high efficiency (>82% at 12 VIN/0.5 A), and robust thermal protection are required.
For engineers reviewing the LM2597HVN-5.0 datasheet, LM2597HVN-5.0 pinout, LM2597HVN-5.0 application, or LM2597HVN-5.0 equivalent, key selection criteria include its 60 V max input rating, 0.5 A regulated output capability, 150 kHz fixed-frequency operation enabling small external magnetics, and built-in thermal shutdown/current limiting for reliable operation in harsh environments.
Technical Context
The LM2597HVN-5.0 integrates a PWM controller, power switch, oscillator, error amplifier, and protection circuitry into a single 8-pin surface-mount package. Its 150 kHz fixed-frequency architecture simplifies EMI filtering and enables use of standard off-the-shelf inductors (e.g., 100 µH for 12 VIN/5 VOUT). The internal bias supply (VBS) pin improves efficiency at high input voltages by powering internal circuitry independently of VIN.
It features a two-stage current limit for the output switch, thermal shutdown, and an out-of-regulation error flag with programmable delay. Soft-start is implemented via an internal current source charging an external capacitor on the SS/SD pin, while shutdown is activated below 0.6 V on that same pin.
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 feedback resistors. |
| Max Input Voltage | 60 V - supports wide-input industrial, automotive, and telecom applications without pre-regulation. |
| Output Current | 0.5 A continuous - sufficient for powering microcontrollers, sensors, and interface ICs directly. |
| Switching Frequency | 150 kHz fixed - enables compact LC filter design using standard low-cost inductors and capacitors. |
| Efficiency | 82% at 12 VIN, 5 VOUT, 0.5 A - reduces thermal load and eliminates need for heatsinks in most PCB layouts. |
| Quiescent Current | 140 µA typical in shutdown - minimizes battery drain in always-on systems. |
| Duty Cycle Range | 0–100% - allows regulation down to near-VIN dropout, supporting wide input/output ratios. |
Pinout & Package
LM2597HVN-5.0 is housed in an 8-pin SOIC (D) package (Package Number D0008A), with exposed thermal pad for enhanced heat dissipation. Pinout is validated per TI SNVS119C Figure 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input Power Supply | Accepts 4.5–60 V DC; requires local 47–68 µF low-ESR input capacitor. |
| SW | Switch Node | Drives external catch diode and inductor; high dv/dt node requiring short PCB traces. |
| GND | Power Ground | Common return for input, output, and internal circuits; must be low-impedance copper plane. |
| FB | Feedback Input | Internally connected to 5 V reference; not used in fixed-output versions - left open or grounded per datasheet. |
| SD/SS | Shutdown/Soft-start | Pulled low (<0.6 V) disables regulator; externally capacitor-controlled ramp for controlled startup. |
| FLAG | Error Flag Output | Open-drain output pulled low when output drops >4% below nominal - enables system monitoring. |
| DELAY | Flag Delay Control | Sets delay time before FLAG asserts during undervoltage - prevents false triggers during transients. |
| VBS | Bias Supply | Provides dedicated internal bias; improves efficiency above 20 VIN by reducing VIN current draw. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Soft-start | Internal current source charges external capacitor on SD/SS pin - eliminates output overshoot and inrush current. |
| Out-of-Regulation Flag | Open-drain FLAG pin with programmable delay via DELAY pin - enables fault logging and system-level safety response. |
| High-Voltage Input Support | 60 V absolute maximum input rating (LM2597HV variant) - eliminates need for external pre-regulators in 48 V industrial systems. |
| Thermal Shutdown + Current Limit | Two-stage current limit plus junction temperature cutoff at +150 °C - protects device and system under overload/short-circuit. |
| VBS Bias Supply | Dedicated bias rail decouples internal circuitry from VIN - maintains high efficiency (>80%) even at 48 VIN. |
Applications
| Industrial Sensor Node Power | Automotive Body Control Module |
|---|---|
Use Scenario: Powering 3.3 V/5 V microcontrollers, analog front-ends, and CAN transceivers in distributed sensor nodes operating from 24 V or 48 V rails. IC Role / Device Role / Timing Role: Primary buck regulator converting unregulated vehicle or factory bus voltage to clean, regulated 5 V supply. Use Value: 60 V input rating enables direct connection to 48 V systems; 82% efficiency minimizes self-heating in sealed enclosures. | Use Scenario: Generating 5 V for body control units (BCUs) in 12 V/24 V automotive platforms with cold-crank and load-dump immunity requirements. IC Role / Device Role / Timing Role: Main 5 V DC-DC converter supplying core logic, memory, and I/O buffers in BCU ECUs. Use Value: 150 kHz fixed frequency simplifies EMI compliance; thermal shutdown ensures reliability during extended under-hood operation. |
| Programmable Logic Controller (PLC) I/O Module | Telecom Remote Radio Unit (RRU) |
Use Scenario: Providing isolated 5 V supply for digital I/O conditioning circuits in modular PLC backplanes powered from 24–48 V DC. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering stable 5 V to optocouplers, level shifters, and status LEDs. Use Value: ±4% output tolerance guarantees logic-level compatibility across temperature; low 140 µA shutdown current extends backup battery life. | Use Scenario: Converting -48 V telecom rectified supply (via intermediate +48 V) to 5 V for FPGA configuration, clock buffers, and monitoring ICs in outdoor RRUs. IC Role / Device Role / Timing Role: Secondary buck stage after primary isolation, delivering precise 5 V to sensitive RF subsystems. Use Value: FLAG/DELAY functionality enables real-time health monitoring; VBS pin sustains efficiency across wide input variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-5.0 | Same 5 V fixed output, but 150 kHz frequency and 3 A rating; larger TO-263 package; no VBS or FLAG pins. | Lacks error flag and bias supply - unsuitable for safety-monitored or high-input-voltage designs. | Select if higher output current (3 A) is needed and monitoring/efficiency at high VIN are not critical. |
| TPS54302DDCR | 3 A synchronous buck, 2.5–6 V input, 5 V output; 2.5 MHz switching; integrated FETs; no FLAG/VBS. | Lower input voltage range (max 6 V) - incompatible with 24 V+ systems; higher frequency demands tighter layout. | Choose for space-constrained, low-input-voltage applications where synchronous efficiency outweighs HV capability. |
Compared with LM2596S-5.0 and TPS54302DDCR, the LM2597HVN-5.0 uniquely combines 60 V input support, integrated fault flagging, and VBS-enhanced efficiency-making it optimal for industrial and telecom power where input range and system monitoring are essential.
Availability
LM2597HVN-5.0 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, PLC I/O modules, and telecom remote radio units requiring stable component supply and long-term production continuity.
Supply support for LM2597HVN-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 high-reliability power conversion ICs.
The LM2597/LM2597HV series was designed specifically for cost-sensitive, high-input-voltage DC-DC conversion in industrial, automotive, and telecom infrastructure-emphasizing simplicity, ruggedness, and minimal external component count.
FAQ
What is the maximum input voltage rating for the LM2597HVN-5.0?
The LM2597HVN-5.0 has a maximum input voltage rating of 60 V, confirmed in the Absolute Maximum Ratings table of TI's SNVS119C datasheet. This distinguishes it from the standard LM2597 (45 V max) and enables direct operation from 48 V industrial or telecom supplies without pre-regulation. Operating beyond 60 V risks permanent damage.
Does the LM2597HVN-5.0 require external feedback resistors to set its output voltage?
No, the LM2597HVN-5.0 does not require external feedback resistors. As a fixed-output variant, its 5.0 V regulation is achieved internally; the FB pin is unused and must be left open or grounded per TI's recommended layout guidelines in SNVS119C Section 8.1. This simplifies design and improves stability versus adjustable versions.
How does the VBS pin improve efficiency in the LM2597HVN-5.0?
The VBS pin on the LM2597HVN-5.0 provides a dedicated bias supply for internal circuitry, decoupling it from the main VIN rail. As shown in TI's electrical characteristics (Section 6.6), this reduces quiescent current draw from VIN at high input voltages - sustaining 82% efficiency at 12 VIN and maintaining usable efficiency even at 48 VIN, unlike non-VBS buck regulators.
Can the LM2597HVN-5.0 be used in automotive cold-crank conditions?
Yes, the LM2597HVN-5.0 supports automotive cold-crank operation. Its operating input range starts at 4.5 V, and it maintains regulation down to ~5.5 V input while delivering 5 V output (per dropout behavior in Figure 9). Combined with 60 V max rating, it handles both cold-crank dips and load-dump transients when paired with appropriate input clamping and filtering per TI Application Report SLVA312.
What thermal considerations apply to the LM2597HVN-5.0 in continuous 0.5 A operation?
In continuous 0.5 A operation at 12 VIN/5 VOUT, the LM2597HVN-5.0 dissipates ~3.5 W (calculated from 82% efficiency). With its SOIC-D package θJA of 150 °C/W, a 40 °C ambient yields ~95 °C junction rise - within the +150 °C max. TI recommends ≥1 in² copper pour under the exposed pad and adjacent GND planes to ensure safe thermal margin per Section 8.2 of SNVS119C.
LM2597HVN-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LM2597HVN-5.0 FAQ
1.How can I place an order for LM2597HVN-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2597HVN-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 LM2597HVN-5.0 reliable?
The price and inventory of LM2597HVN-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 LM2597HVN-5.0 is usually 5 days.
3.What payment methods are accepted for LM2597HVN-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2597HVN-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2597HVN-5.0?
LM2597HVN-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2597HVN-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 LM2597HVN-5.0?
For technical support, including LM2597HVN-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2597HVN-5.0 requirements.
6.How does Aetrix verify that LM2597HVN-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2597HVN-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 LM2597HVN-5.0 meets industry standards.
7.What is the process for return or replacement of LM2597HVN-5.0?
All LM2597HVN-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2597HVN-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 LM2597HVN-5.0 part is unused and in its original packaging.
Return procedure for LM2597HVN-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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