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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Texas Instruments LM2597HVN-5.0/NOPB

Name: LM2597HVN-5.0/NOPB
Brand: Texas Instruments
SKU: LM2597HVN-5.0/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM2597HVN-5.0/NOPB

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-DIP (0.300", 7.62mm)

Datasheet:: LM2597HVN-5.0/NOPB.pdf

Description:: IC REG BUCK 5V 500MA 8PDIP

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Product details

Overview

LM2597HVN-5.0/NOPB from Texas Instruments is a monolithic 150-kHz nonsynchronous step-down (buck) DC-DC converter delivering 0.5-A output current with fixed 5-V output, ±4% output voltage tolerance over line and load, input voltage range up to 60 V, and integrated shutdown/soft-start and error flag functions - used in industrial power supplies, embedded system rails, and automotive auxiliary converters.

For engineers reviewing the LM2597HVN-5.0/NOPB datasheet, LM2597HVN-5.0/NOPB pinout, LM2597HVN-5.0/NOPB application, or LM2597HVN-5.0/NOPB equivalent, key selection criteria include its HV-rated 60-V input capability, bias supply (VBS) pin for efficiency optimization at high VIN/low VOUT, thermal shutdown protection, 85-μA standby current, and compatibility with standard off-the-shelf inductors.

Technical Context

The LM2597HVN-5.0/NOPB implements a fixed-frequency (150 kHz) current-mode control architecture with internal compensation, enabling stable operation using minimal external components. Its nonsynchronous buck topology integrates a single N-channel DMOS switch with 1.1-V typical saturation voltage at 0.5-A load.

It features dual-function Shutdown/Soft-Start pin enabling logic-level disable (80-μA standby) and controlled output ramp-up via external capacitor, plus an open-collector Error_Flag output with built-in 5% dropout detection and 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/temperature range - ensures stable microcontroller or sensor rail without external feedback resistors.
Max Input Voltage	60 V - supports wide-input applications including 24-V and 48-V industrial buses and automotive cold-crank conditions.
Output Current	0.5 A continuous - sufficient for powering FPGA I/O banks, MCU cores, or multiple peripheral ICs from a single regulator.
Switching Frequency	150 kHz (±15%) - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity vs. higher-frequency alternatives.
Standby Current	140 μA typical - minimizes battery drain in always-on systems such as telematics or remote sensors.
Efficiency	82% typical at 12-V_IN, 0.5-A load - achieved via low R_DS(on) switch and optional VBS bias supply connection to improve light-load performance.
Thermal Protection	Internal thermal shutdown - prevents damage during sustained overload or poor PCB heatsinking; auto-recovery on cooldown.

Pinout & Package

LM2597HVN-5.0/NOPB is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size) with standard surface-mount footprint and thermal pad-compatible layout.

Pin/Terminal	Circuit Role	Design Meaning
1 - Error_Flag	Open-collector fault indicator	Drives low when output drops >5% below 5 V; used for microprocessor reset or system fault signaling.
2 - Delay	Capacitor-based timing node	Controls delay between output reaching 95% regulation and Error_Flag deassertion - avoids false resets during startup.
3 - Bias_Supply (VBS)	Internal circuit power source	Accepts regulated output (≥4 V) to reduce VIN current draw and improve efficiency at high input/low output conditions.
4 - Feedback	Regulation sense input	Internally tied to 5-V reference; not connected externally in fixed-output versions - simplifies design.
5 - Shutdown/Soft-Start	Logic control & ramp timing	Pulled low disables switching (80-μA IQ); capacitor added enables controlled VOUT rise time and limits inrush current.
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 switch drain	Swings between ~−0.5 V (during freewheeling) and (VIN − 1.1 V); connects to catch diode anode and inductor.

Key Features

Feature	Design Value
Integrated 60-V HV process	Enables direct regulation from unregulated 24-V/48-V industrial or automotive sources without pre-regulator stage.
VBS bias supply pin	Reduces total input current by powering internal circuitry from VOUT - improves efficiency by up to 5% at light loads and high VIN.
Programmable soft-start	External capacitor sets output ramp time - prevents inrush into large output capacitors and avoids brownout in shared input rails.
Open-collector error flag	Provides system-level power-good signaling with built-in delay - eliminates need for external supervisor IC in many designs.
Thermal shutdown + current limit	Dual-stage protection: peak current limit (~0.8 A) prevents switch failure; junction temperature cutoff (~150°C) guards against sustained overload.

Applications

Industrial PLC Power Rail	Automotive Body Control Module
Use Scenario: Generating clean 5-V supply for PLC I/O modules operating from 24-V DC field bus with transient surges up to 60 V. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, regulated 5-V rail with fault signaling to PLC controller. Use Value: Eliminates need for discrete HV front-end; 60-V input rating withstands load-dump transients; Error_Flag enables diagnostics without extra components.	Use Scenario: Powering microcontroller, CAN transceiver, and LED drivers in vehicle door module powered from 12-V battery with cold-crank down to 6 V. IC Role / Device Role / Timing Role: Buck converter supplying stable 5-V domain during cranking and load dump events. Use Value: 4.5-V minimum input ensures operation during cold-crank; 60-V rating handles ISO 7637-2 pulse 5a; soft-start prevents CAN bus reset during ignition.
Medical Point-of-Care Device	Test & Measurement Equipment
Use Scenario: Providing low-noise 5-V supply for analog front-end and ADC in portable ultrasound or glucose meter with Li-ion battery input (3.0–4.2 V) and backup 24-V adapter. IC Role / Device Role / Timing Role: Dual-input capable buck regulator supporting both battery and adapter inputs via OR-ing diodes. Use Value: Wide 4.5–60-V input accommodates adapter; low 85-μA standby extends battery life; fixed 5-V output avoids calibration drift from resistor tolerances.	Use Scenario: Generating 5-V rail for digital logic and interface circuits in benchtop oscilloscopes or signal generators with multi-rail power supplies. IC Role / Device Role / Timing Role: Secondary regulated supply derived from main 12-V or 24-V intermediate bus. Use Value: 150-kHz switching allows compact LC filter design; thermal shutdown protects against probe short-circuit faults; Error_Flag triggers instrument self-test on power-up.

Industrial PLC Power Rail

Automotive Body Control Module

Use Scenario: Generating clean 5-V supply for PLC I/O modules operating from 24-V DC field bus with transient surges up to 60 V.

IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, regulated 5-V rail with fault signaling to PLC controller.

Use Value: Eliminates need for discrete HV front-end; 60-V input rating withstands load-dump transients; Error_Flag enables diagnostics without extra components.

Use Scenario: Powering microcontroller, CAN transceiver, and LED drivers in vehicle door module powered from 12-V battery with cold-crank down to 6 V.

IC Role / Device Role / Timing Role: Buck converter supplying stable 5-V domain during cranking and load dump events.

Use Value: 4.5-V minimum input ensures operation during cold-crank; 60-V rating handles ISO 7637-2 pulse 5a; soft-start prevents CAN bus reset during ignition.

Medical Point-of-Care Device

Test & Measurement Equipment

Use Scenario: Providing low-noise 5-V supply for analog front-end and ADC in portable ultrasound or glucose meter with Li-ion battery input (3.0–4.2 V) and backup 24-V adapter.

IC Role / Device Role / Timing Role: Dual-input capable buck regulator supporting both battery and adapter inputs via OR-ing diodes.

Use Value: Wide 4.5–60-V input accommodates adapter; low 85-μA standby extends battery life; fixed 5-V output avoids calibration drift from resistor tolerances.

Use Scenario: Generating 5-V rail for digital logic and interface circuits in benchtop oscilloscopes or signal generators with multi-rail power supplies.

IC Role / Device Role / Timing Role: Secondary regulated supply derived from main 12-V or 24-V intermediate bus.

Use Value: 150-kHz switching allows compact LC filter design; thermal shutdown protects against probe short-circuit faults; Error_Flag triggers instrument self-test on power-up.

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM2596-5.0	Lower max input voltage (40 V), same 0.5-A rating and 150-kHz frequency; no VBS pin or Delay pin.	Lacks bias supply efficiency boost and programmable error flag delay - suitable only where input stays ≤40 V and simplified supervision suffices.	Select LM2596-5.0 only if cost sensitivity outweighs 60-V margin and VBS efficiency gain.
TPS54302DDCR	Higher efficiency (92% typ), 3-A rating, 2.5-MHz switching, integrated MOSFETs; requires external compensation.	Supports smaller magnetics and faster transient response but demands more design effort and lacks native 60-V input - needs pre-regulator for HV use.	Choose TPS54302DDCR for space-constrained, high-efficiency designs where input is ≤28 V and layout expertise exists.

Compared with LM2596-5.0, LM2597HVN-5.0/NOPB adds critical 60-V input headroom and VBS-driven efficiency; versus TPS54302DDCR, it trades higher integration for simpler implementation and true HV resilience - making it optimal for ruggedized 24/48-V systems needing plug-and-play reliability.

Availability

LM2597HVN-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LM2597HVN-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 high-reliability power conversion solutions.

The LM2597HV product line was designed specifically for robust, wide-input-voltage DC-DC conversion in harsh environments - targeting industrial controls, transportation systems, and infrastructure equipment where input transients and long service life are critical.

FAQ

What is the maximum input voltage rating for LM2597HVN-5.0/NOPB?

The LM2597HVN-5.0/NOPB supports a maximum input voltage of 60 V, 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 direct use in 48-V industrial buses and automotive load-dump scenarios without external clamping or pre-regulation.

Does LM2597HVN-5.0/NOPB require external feedback resistors to set the output voltage?

No, LM2597HVN-5.0/NOPB does not require external feedback resistors. As a fixed 5.0-V output version, the feedback network is fully internal - pin 4 (Feedback) is internally connected to the 5-V reference and left unconnected in the application circuit. This eliminates resistor tolerance errors and simplifies layout versus adjustable variants like the LM2597HVN-ADJ.

How does the Bias_Supply (VBS) pin improve efficiency in LM2597HVN-5.0/NOPB?

The VBS pin on LM2597HVN-5.0/NOPB allows internal circuitry to be powered from the regulated 5-V output instead of the high-input rail, reducing total input current draw - especially beneficial at high VIN/low ILOAD conditions. TI's Figure 19 shows up to 5% efficiency gain at light loads when VBS is tied to VOUT; the pin requires ≥4 V to operate and is inactive if left floating.

Can LM2597HVN-5.0/NOPB be used in an inverting (positive-to-negative) configuration?

Yes, LM2597HVN-5.0/NOPB can be configured as a positive-to-negative converter per TI Application Note SLVA013 and Figure 24 in the datasheet. It generates −5 V from a positive input by bootstrapping the GND pin to the negative output. Critical constraints include limiting the sum of |V_IN| + |V_OUT| to ≤60 V and using a Schottky catch diode; startup inrush current is higher than in buck mode.

What protection features are integrated into LM2597HVN-5.0/NOPB?

LM2597HVN-5.0/NOPB integrates thermal shutdown, two-stage current limiting (peak ~0.8 A), undervoltage lockout (4.5-V start threshold), and an open-collector Error_Flag with 5% output dropout detection. These are documented in Sections 7.1–7.9 and 8.3 of the SNVS119D datasheet and require no external components to function - ensuring robust operation under overload, overtemperature, and input fault conditions.

LM2597HVN-5.0/NOPB Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: SIMPLE SWITCHER®

Package/Case:: 8-DIP (0.300", 7.62mm)

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:: Through Hole

Supplier Device Package:: 8-PDIP

LM2597HVN-5.0/NOPB FAQ

1.How can I place an order for LM2597HVN-5.0/NOPB through Aetrix?

Please submit a Request for Quotation (RFQ) for LM2597HVN-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 LM2597HVN-5.0/NOPB reliable?

The price and inventory of LM2597HVN-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 LM2597HVN-5.0/NOPB is usually 5 days.

3.What payment methods are accepted for LM2597HVN-5.0/NOPB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2597HVN-5.0/NOPB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM2597HVN-5.0/NOPB?

LM2597HVN-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM2597HVN-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 LM2597HVN-5.0/NOPB?

For technical support, including LM2597HVN-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2597HVN-5.0/NOPB requirements.

6.How does Aetrix verify that LM2597HVN-5.0/NOPB is sourced from the original manufacturer or authorized distributors?

All LM2597HVN-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 LM2597HVN-5.0/NOPB meets industry standards.

7.What is the process for return or replacement of LM2597HVN-5.0/NOPB?

All LM2597HVN-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2597HVN-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 LM2597HVN-5.0/NOPB part is unused and in its original packaging.

Return procedure for LM2597HVN-5.0/NOPB:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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