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Texas Instruments LM2597HVMX-5.0/NOPB
- Part No.:
- LM2597HVMX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2597HVMX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
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Product details
Overview
LM2597HVMX-5.0/NOPB from Texas Instruments is a nonsynchronous step-down DC-DC converter IC delivering 5.0 V fixed output at up to 0.5 A, operating from 4.5 V to 60 V input, with 150-kHz fixed-frequency switching, ±4% output voltage tolerance over line/load/temperature, and integrated soft-start/shutdown control. It serves as a primary buck regulator in industrial power supplies and automotive subsystems.
For engineers reviewing the LM2597HVMX-5.0/NOPB datasheet, LM2597HVMX-5.0/NOPB pinout, LM2597HVMX-5.0/NOPB application, or LM2597HVMX-5.0/NOPB equivalent, key selection criteria include its 60-V HV input rating, bias supply (VBS) pin for efficiency optimization at high VIN/low VOUT, error flag with delay timing, thermal shutdown, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2597HVMX-5.0/NOPB implements a monolithic buck topology with internal NPN switch, fixed 150-kHz oscillator, and voltage-mode control. Its feedback loop references a 1.23-V internal bandgap, enabling precise 5.0-V regulation via internal resistor divider - no external resistors required.
It integrates dual-function Shutdown/Soft-Start (SD/SS) pin for logic-level enable/disable and controlled output ramp-up via external capacitor, plus an open-collector Error_Flag output activated when VOUT drops below 95% of nominal, with programmable delay via external capacitor on the Delay pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line, load, and temperature range - ensures stable microcontroller or sensor rail without external feedback components. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-input applications including 24-V and 48-V industrial buses and automotive cold-crank conditions. |
| Max Output Current | 0.5 A DC - sufficient for powering FPGA I/O banks, MCU cores, or multiple peripheral ICs in compact designs. |
| Switching Frequency | 150 kHz (±15%) - enables use of low-cost, high-saturation-current through-hole or SMT inductors with minimal EMI filtering. |
| Quiescent Current | Typ. 140 μA in standby (HV version) - extends battery life in always-on monitoring systems. |
| Saturation Voltage | 1.1 V max at 0.5 A - defines conduction loss and impacts minimum dropout; requires careful thermal design at high VIN/VOUT ratios. |
| Efficiency | 82% typ. at 12 VIN/5 VOUT/0.5 A - improves thermal performance and reduces board-level heat sinking requirements. |
Pinout & Package
LM2597HVMX-5.0/NOPB is supplied in an 8-pin SOIC package (4.90 mm × 3.91 mm body), surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Error_Flag | Open-collector fault indicator | Drives low when VOUT falls below 95% of 5.0 V; used for µP reset assertion after programmable delay. |
| 2 - Delay | Capacitor-based timing node | Controls delay between VOUT reaching regulation and Error_Flag deassertion; sets power-good timing window. |
| 3 - Bias_Supply (VBS) | Internal circuitry power source | Accepts regulated 5.0 V output to reduce VIN current draw and improve efficiency at high input voltages. |
| 4 - Feedback | Regulation sense input | Internally connected to 5.0-V divider; left unconnected - no external resistor network needed for fixed-output operation. |
| 5 - Shutdown/Soft-Start | Enable and startup control | Pulled low disables regulator (ISTBY ≈ 140 μA); capacitor here controls output voltage ramp rate during power-up. |
| 6 - Ground | Power and signal reference | Common return for internal switch, control circuitry, and external catch diode cathode. |
| 7 - +VIN | Main power input | Accepts 4.5–60 V; requires local ceramic bypass capacitor to handle high di/dt switching currents. |
| 8 - Output | Internal NPN switch collector | Swings between ~−0.5 V (off) and (VIN − VSAT) (on); connects to catch diode anode and inductor input. |
Key Features
| Feature | Design Value |
|---|---|
| Bias Supply (VBS) Pin | Enables powering internal circuitry from 5.0-V output instead of VIN, reducing input current and improving efficiency by up to 5% at high VIN/low ILOAD. |
| Integrated Soft-Start | External capacitor on SD/SS pin controls monotonic 5.0-V ramp-up, limiting inrush current to ≤160 mA - avoids tripping upstream current limits. |
| Error Flag with Delay | Open-drain output asserts low on undervoltage, with timing set by external capacitor on Delay pin - provides configurable power-good timing for system sequencing. |
| Thermal Shutdown & Current Limit | Two-stage current limit (0.65–1.3 A peak) and junction thermal shutdown (>150°C) protect against sustained overload or poor heatsinking. |
| Standard Inductor Compatibility | Optimized for widely available 100-μH, 1-A shielded SMT inductors - eliminates custom magnetics and accelerates design cycle. |
Applications
| Industrial Power Supply | Automotive Subsystem |
|---|---|
Use Scenario: Generating 5.0 V from a 24-V truck battery for CAN transceivers and microcontrollers under cold-crank (down to 6 V) and load-dump (up to 60 V) conditions. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 5.0-V rail with built-in overvoltage/overcurrent protection and error signaling. Use Value: Withstands 60-V transients without external clamping; 140-μA standby current minimizes parasitic drain on vehicle battery during sleep mode. | Use Scenario: Powering infotainment display logic and touch controller from a 12-V automotive bus with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Compact, self-contained step-down converter delivering clean 5.0 V with soft-start to prevent display flicker during ignition-on sequencing. Use Value: 150-kHz fixed frequency simplifies EMI filter design; SOIC package allows dense layout with minimal copper area on noisy vehicle PCBs. |
| Programmable Logic Interface | Remote Sensor Node |
Use Scenario: Supplying configurable 5.0-V I/O bank voltage for FPGA or CPLD in industrial PLC modules interfacing with 24-V field sensors. IC Role / Device Role / Timing Role: High-efficiency, robust DC-DC stage converting wide-range 18–36-V backplane to stable 5.0-V logic rail with fault reporting. Use Value: ±4% output tolerance ensures reliable I/O voltage margin across temperature; Error_Flag signals rail failure to host controller for diagnostics. | Use Scenario: Battery-powered environmental sensor node requiring long-life 5.0-V supply from LiSOCl₂ (3.6 V) or two alkaline cells (3.0 V), boosted via external charge pump or powered from higher-voltage solar input. IC Role / Device Role / Timing Role: Fixed-output buck regulator accepting up to 60 V from solar panel or auxiliary supply, delivering regulated 5.0 V with ultra-low quiescent current. Use Value: 140-μA standby IQ extends shelf life; VBS pin enables efficiency boost when solar voltage exceeds 12 V, extending operational hours per charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596SX-5.0/NOPB | Same 5.0-V fixed output, but max input 40 V (not 60 V); lower IQ (50 μA vs 140 μA); no VBS pin. | Limited to ≤40-V input systems; lacks bias supply efficiency boost at high VIN; suitable where cost is prioritized over HV capability. | Select LM2596SX-5.0/NOPB only if input never exceeds 40 V and VBS optimization is unnecessary. |
| LM2678SX-5.0/NOPB | Higher 5-A output current; 260-kHz switching; no Error_Flag or Delay pins; no VBS pin; requires external compensation. | Targeted at high-power loads; lacks integrated fault signaling and soft-start timing control; more complex layout due to external compensation. | Choose LM2678SX-5.0/NOPB only when ≥3-A output is required and system-level fault management is handled externally. |
Compared with LM2596SX-5.0/NOPB, LM2597HVMX-5.0/NOPB adds 20-V input headroom and VBS-driven efficiency gains; versus LM2678SX-5.0/NOPB, it trades raw current capacity for integrated protection, timing, and ease-of-use in mid-power applications.
Availability
LM2597HVMX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive subsystems, and remote sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for LM2597HVMX-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 expertise in high-reliability power conversion ICs.
The LM2597HV product line delivers rugged, easy-to-use buck regulators targeting industrial, automotive, and telecom applications where wide-input voltage range, integrated protection, and minimal external components are critical.
FAQ
What is the maximum input voltage rating for LM2597HVMX-5.0/NOPB?
The LM2597HVMX-5.0/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 (SNVS119D). This HV rating distinguishes it from the standard LM2597 (40 V max) and enables use in 48-V industrial systems and automotive load-dump scenarios. Exceeding 60 V risks permanent damage.
Does LM2597HVMX-5.0/NOPB require external feedback resistors to set the 5.0-V output?
No. The LM2597HVMX-5.0/NOPB is a fixed-output variant with internal resistor divider network calibrated for 5.0 V ±4%. Pin 4 (Feedback) is internally connected and must be left unconnected in standard operation - no external resistors are needed, simplifying layout and reducing BOM count. This is explicitly stated in the Pin Functions table and Typical Application schematics.
How does the Bias Supply (VBS) pin improve efficiency in LM2597HVMX-5.0/NOPB?
The VBS pin on LM2597HVMX-5.0/NOPB allows internal circuitry to be powered from the regulated 5.0-V output instead of the high-input rail, reducing VIN current draw. As documented in Figure 19 and Section 8.3.1, this yields up to 5% efficiency gain at high VIN (e.g., 48 V) and light loads - directly lowering power dissipation and junction temperature without modifying the core buck topology.
Can LM2597HVMX-5.0/NOPB be used in an inverting (positive-to-negative) configuration?
Yes. The LM2597HVMX-5.0/NOPB supports inverting regulator topologies, as detailed in Figure 24 and Section 8.3.3. When configured to generate −5 V from a positive input, it leverages the same internal switch and control architecture. Critical constraints apply: the sum of |VIN| + |VOUT| must not exceed 60 V, and a Schottky catch diode and modified grounding scheme are required - full implementation guidance is provided in the TI datasheet.
What protection features are integrated into LM2597HVMX-5.0/NOPB?
The LM2597HVMX-5.0/NOPB integrates thermal shutdown (triggered above 150°C junction temperature), two-stage current limiting (0.58–1.4 A peak), and an open-collector Error_Flag output that asserts low during output undervoltage. These are production-tested features listed in Sections 7.4, 7.9, and 6 of the SNVS119D datasheet - no external components are required to enable basic fault protection.
LM2597HVMX-5.0/NOPB 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:
- 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
LM2597HVMX-5.0/NOPB FAQ
1.How can I place an order for LM2597HVMX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2597HVMX-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 LM2597HVMX-5.0/NOPB reliable?
The price and inventory of LM2597HVMX-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 LM2597HVMX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2597HVMX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2597HVMX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2597HVMX-5.0/NOPB?
LM2597HVMX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2597HVMX-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 LM2597HVMX-5.0/NOPB?
For technical support, including LM2597HVMX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2597HVMX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2597HVMX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2597HVMX-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 LM2597HVMX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2597HVMX-5.0/NOPB?
All LM2597HVMX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2597HVMX-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 LM2597HVMX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2597HVMX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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