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Texas Instruments LM2597HVM-5.0
- Part No.:
- LM2597HVM-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2597HVM-5.0.pdf
- Description:
- IC REG BUCK 5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,997
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Product details
Overview
LM2597HVM-5.0 from Texas Instruments is a monolithic 150-kHz nonsynchronous step-down (buck) DC-DC converter IC delivering up to 0.5 A output current with fixed 5.0 V output, ±4% regulation over line and load, input voltage range up to 60 V, and integrated shutdown/soft-start, error flag, and bias supply (VBS) functionality - used in industrial power supplies and embedded system point-of-load conversion.
For engineers reviewing the LM2597HVM-5.0 datasheet, LM2597HVM-5.0 pinout, LM2597HVM-5.0 application, or LM2597HVM-5.0 equivalent, key selection criteria include input voltage headroom (up to 60 V), regulated 5.0 V output tolerance, thermal performance in SOIC-8 package, standby quiescent current (140 μA typ), and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2597HVM-5.0 implements a fixed-frequency (150 kHz) current-mode buck topology with internal oscillator, PWM comparator, and N-channel MOSFET switch. It uses external diode, inductor, and capacitors for energy transfer and filtering, and features built-in thermal shutdown and two-stage current limiting.
Its bias supply (VBS) pin enables powering internal circuitry from the regulated 5.0 V output rather than VIN - improving efficiency at high input voltages (>24 V) and light loads. The error flag (open-collector) asserts low when output drops >5% below 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/temperature range - ensures stable microcontroller or logic rail without external feedback resistors. |
| Max Input Voltage | 60 V - supports wide-input industrial, automotive, and telecom applications where input may vary from 12 V to 48 V nominal. |
| Output Current | 0.5 A continuous - sufficient for powering FPGA I/O banks, sensor interfaces, or small MCU subsystems. |
| Switching Frequency | 150 kHz (±15%) - enables use of compact, low-cost 100–220 μH inductors and reduces EMI compared to lower-frequency alternatives. |
| Standby Quiescent Current | 140 μA typical - minimizes battery drain in always-on systems requiring controlled enable/disable. |
| Efficiency | 82% typical at 12 VIN, 0.5 A - reduces thermal load on PCB copper traces, eliminating need for dedicated heatsinks in most layouts. |
| Saturation Voltage | 1.1 V max at 0.5 A - defines minimum dropout (VIN − VOUT) required for regulation; e.g., needs ≥6.1 VIN to sustain 5.0 VOUT. |
Pinout & Package
LM2597HVM-5.0 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, optimized for surface-mount assembly and thermal dissipation via PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Error_Flag) | Open-collector fault indicator | Asserts low when VOUT falls >5% below 5.0 V; used as hardware reset signal for microcontrollers during brownout. |
| 2 (Delay) | Capacitor-based timing node | Controls delay between VOUT reaching 95% and Error_Flag deassertion - prevents false resets during startup. |
| 3 (Bias_Supply) | Internal regulator power source | Accepts 3.5–30 V; connecting to 5.0 V output improves efficiency at high VIN/light load by reducing internal LDO losses. |
| 4 (Feedback) | Regulation reference input | Internally tied to 5.0 V output; not user-accessible - eliminates external resistor divider and associated tolerance errors. |
| 5 (Shutdown/Soft-Start) | Dual-function control input | Pull ≤0.6 V to shut down (IQ ≈ 140 μA); add capacitor for soft-start ramp - limits inrush current to ~160 mA vs 700 mA without. |
| 6 (Ground) | Power and signal reference | Common return for internal switch, control circuitry, and external components - requires low-impedance PCB plane connection. |
| 7 (+VIN) | Main power input | Accepts 4.5–60 V; requires local 100 nF ceramic bypass capacitor to suppress switching transients and supply peak currents. |
| 8 (Output) | Switch node | Drives external catch diode and inductor; swings between (VIN − VSAT) and ~−0.5 V - demands minimal PCB copper area to reduce EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Soft-Start | Reduces peak inrush current from 700 mA to 160 mA using external capacitor - protects upstream power sources and avoids tripping current limits. |
| Bias Supply (VBS) Pin | Enables powering internal circuitry from 5.0 V output instead of VIN - increases efficiency by ~3–5% at VIN = 36–48 V and ILOAD < 100 mA. |
| Error Flag with Delay | Provides synchronized, glitch-free reset assertion after regulated output stabilizes - eliminates need for external supervisor IC in many embedded designs. |
| Thermal Shutdown + Current Limit | Two-stage current limit (0.65–1.3 A) and junction temperature cutoff at 150°C - ensures robust operation under overload or short-circuit conditions without external protection. |
| SOIC-8 Package Compatibility | Pinout matches industry-standard buck controller footprints - allows drop-in replacement in existing layouts designed for similar 8-pin regulators. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Converting 24 V vehicle battery or 48 V industrial bus to stable 5.0 V for microcontroller peripherals and CAN transceivers. IC Role / Device Role / Timing Role: Primary step-down regulator supplying core logic voltage with tight regulation and fault signaling. Use Value: Withstands load dump transients up to 60 V and maintains regulation across −40°C to +125°C ambient - meets AEC-Q200 stress requirements when properly derated. | Use Scenario: Providing isolated 5.0 V rail for door module ECUs, seat controllers, or lighting drivers in 12 V/24 V architectures. IC Role / Device Role / Timing Role: Compact, self-contained buck converter enabling space-constrained PCBs with minimal BOM count. Use Value: 140 μA standby current extends battery life during vehicle sleep mode; soft-start prevents CAN bus glitches during ignition cycle. |
| Programmable Logic I/O Supply | Field Instrumentation Sensor Hub |
Use Scenario: Generating clean 5.0 V for FPGA I/O banks or CPLD configuration circuits in test equipment and data acquisition systems. IC Role / Device Role / Timing Role: Point-of-load regulator placed near FPGA to minimize IR drop and noise coupling. Use Value: 150 kHz switching frequency allows use of small, shielded 100 μH inductors - reduces board area and magnetic interference with analog front-ends. | Use Scenario: Powering 4–20 mA loop-powered sensors, ADCs, and wireless transceivers in hazardous-area process control enclosures. IC Role / Device Role / Timing Role: High-reliability DC-DC stage converting wide-range 12–48 V DC input to isolated 5.0 V logic supply. Use Value: Built-in thermal shutdown and current limit eliminate need for external protection circuitry - simplifies safety certification for Class I Div 2 environments. |
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 | Same 5.0 V fixed output, but max input 40 V and no VBS pin - lower efficiency at VIN > 24 V; 1.5 A output rating. | Lacks bias supply and error flag; suitable only where input stays ≤40 V and fault signaling is unnecessary. | Select if higher output current (1.5 A) is needed and input voltage never exceeds 40 V. |
| TPS54302DDCR | 3.5–28 V input, 5.0 V output, 3 A capability, integrated high-side FET, 500 kHz switching - smaller solution size but narrower input range. | No error flag or delay function; requires external compensation; lacks HV input support. | Choose for space-constrained designs with ≤28 V input and need for >0.5 A output. |
Compared with LM2596-5.0 and TPS54302DDCR, the LM2597HVM-5.0 uniquely balances 60 V input capability, integrated fault signaling, and bias-supply efficiency enhancement - making it optimal for ruggedized 24/48 V industrial and transportation systems where reliability and wide VIN margin are critical.
Availability
LM2597HVM-5.0 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and field instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LM2597HVM-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 LM2597HV product line was engineered for industrial and automotive applications demanding wide-input-voltage DC-DC regulation with integrated protection and supervisory features - targeting systems where input can exceed 40 V and fault resilience is essential.
FAQ
What is the maximum input voltage supported by the LM2597HVM-5.0?
The LM2597HVM-5.0 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 buses and automotive load-dump scenarios. Operation above 40 V requires the HV variant - the LM2597HVM-5.0 is specifically rated and tested for this extended range.
Does the LM2597HVM-5.0 require external feedback resistors to set its output voltage?
No, the LM2597HVM-5.0 does not require external feedback resistors. It is a fixed-output version with the 5.0 V regulation internally trimmed and verified across temperature and load - the Feedback (FB) pin is pre-connected to the internal reference and not accessible to the user. This eliminates resistor tolerance errors and layout sensitivity, ensuring ±4% output accuracy without additional components.
How does the Bias Supply (VBS) pin improve efficiency in the LM2597HVM-5.0?
The VBS pin in the LM2597HVM-5.0 allows internal circuitry to be powered from the regulated 5.0 V output instead of the high-input voltage rail. When VIN is ≥24 V and load current is light (<100 mA), this reduces power dissipation in the internal LDO, increasing overall efficiency by 3–5% - as shown in Figure 19 of the TI datasheet. The VBS pin must be connected directly to the 5.0 V output; it is not functional with 3.3 V versions due to minimum 3.5 V requirement.
Can the LM2597HVM-5.0 be used in an inverting (positive-to-negative) configuration?
Yes, the LM2597HVM-5.0 can be configured as a positive-to-negative inverter - for example, generating −5 V from a +24 V input - by bootstrapping the GND pin to the negative output and grounding the FB pin. TI Application Note SNVA239 details this topology. However, the maximum voltage across the IC (|VIN| + |VOUT|) must remain ≤60 V, and startup inrush current is higher; soft-start is strongly recommended to avoid input source overload.
What thermal considerations apply to the LM2597HVM-5.0 in SOIC-8 package?
The LM2597HVM-5.0 in SOIC-8 has a junction-to-ambient thermal resistance (RθJA) of 95°C/W with 1 in² copper pad. At 0.5 A output and 36 V input, power dissipation reaches ~3.5 W - resulting in ~330°C rise above ambient without heatsinking. Therefore, PCB copper area around pins 6 (GND) and 7 (+VIN) must be maximized, and operation above 85°C ambient requires derating or forced airflow. Thermal shutdown activates at 150°C junction temperature.
LM2597HVM-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM2597HVM-5.0 FAQ
1.How can I place an order for LM2597HVM-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2597HVM-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 LM2597HVM-5.0 reliable?
The price and inventory of LM2597HVM-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 LM2597HVM-5.0 is usually 5 days.
3.What payment methods are accepted for LM2597HVM-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2597HVM-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2597HVM-5.0?
LM2597HVM-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2597HVM-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 LM2597HVM-5.0?
For technical support, including LM2597HVM-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2597HVM-5.0 requirements.
6.How does Aetrix verify that LM2597HVM-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2597HVM-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 LM2597HVM-5.0 meets industry standards.
7.What is the process for return or replacement of LM2597HVM-5.0?
All LM2597HVM-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2597HVM-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 LM2597HVM-5.0 part is unused and in its original packaging.
Return procedure for LM2597HVM-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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