My Inquiry
My Account
Texas Instruments LM2597HVM-12/NOPB
- Part No.:
- LM2597HVM-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2597HVM-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,167
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2597HVM-12/NOPB from Texas Instruments is a monolithic 150-kHz nonsynchronous step-down (buck) DC-DC converter IC delivering 0.5-A output current with fixed 12-V output, ±4% output voltage tolerance over line/load/temperature, input voltage range up to 60 V, and integrated shutdown/soft-start and error flag functions - used in industrial power supplies, automotive subsystems, and distributed power rails.
For engineers reviewing the LM2597HVM-12/NOPB datasheet, LM2597HVM-12/NOPB pinout, LM2597HVM-12/NOPB application, or LM2597HVM-12/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, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2597HVM-12/NOPB implements a fixed-frequency (150 kHz) current-mode PWM control architecture with internal compensation, enabling stable operation with minimal external components. Its nonsynchronous buck topology uses an internal N-channel MOSFET switch and requires an external catch diode, inductor, and input/output capacitors.
It integrates supervisory features including an open-collector error flag (active-low when VOUT drops >5%), programmable delay timing via external capacitor on the Delay pin, and dual-function Shutdown/Soft-Start pin supporting logic-level disable (ISTBY = 140–250 μA) and controlled output ramp-up. The Bias Supply (VBS) pin allows powering internal circuitry from VOUT instead of VIN - improving efficiency by reducing switching losses at high input voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over full line, load, and temperature range - ensures stable rail for microcontrollers and analog circuitry without external feedback resistors. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-input applications such as automotive (cold-crank), industrial 24/48-V systems, and battery-powered equipment. |
| Max Output Current | 0.5 A DC - sufficient for powering intermediate-power digital loads like FPGAs, sensors, and communication interfaces. |
| Switching Frequency | 150 kHz (±15%) - enables use of compact, low-cost inductors and reduces EMI compared to lower-frequency alternatives. |
| Quiescent Current | Typ. 140 μA in shutdown - minimizes standby power draw in always-on systems like telematics or remote monitoring units. |
| Efficiency | 88% at VIN = 25 V, VOUT = 12 V, IOUT = 0.5 A - reduces thermal stress and eliminates need for heatsinks in PCB copper-only thermal management. |
| Junction Temp Limit | 150 °C with thermal shutdown - protects against sustained overload or poor layout-induced overheating. |
Pinout & Package
LM2597HVM-12/NOPB is packaged in an 8-pin SOIC (D package), body size 4.90 mm × 3.91 mm, with exposed pad not present. Pin functions are validated per TI SNVS119D Rev D datasheet Section 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Error Flag | Open-collector output | Active-low signal indicating VOUT < 95% nominal; used for MCU reset assertion or system fault monitoring. |
| 2 - Delay | Capacitor-connected timing node | Sets delay between VOUT reaching regulation and Error Flag deassertion - prevents premature system wake-up. |
| 3 - Bias Supply (VBS) | Power input for internal circuitry | Accepts 3.5–30 V; connecting to VOUT improves efficiency at high VIN/low IOUT by reducing VIN-derived switching losses. |
| 4 - Feedback | Input to error amplifier | Internally tied to 12-V reference; unused in fixed-output version but must remain unconnected per datasheet. |
| 5 - Shutdown/Soft-Start | Dual-function control input | Pulled low disables regulator (ISTBY ≈ 140 μA); capacitor adds soft-start ramp to limit inrush current during power-up. |
| 6 - Ground | Power and signal reference | Common return for internal circuitry, switch emitter, and external components - requires low-impedance PCB connection. |
| 7 - +VIN | Main power input | Accepts 4.5–60 V; requires local ceramic bypass capacitor (≥1 μF) to suppress switching transients and supply peak currents. |
| 8 - Output | Internal switch collector | Drives external inductor; voltage swings between VIN−VSAT (~VIN−1.1 V) and −0.5 V - demands minimal copper area to reduce EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Bias Supply (VBS) Pin | Enables powering internal logic from regulated VOUT instead of VIN - increases efficiency by ~3–5% at VIN ≥ 36 V and light loads. |
| Integrated Soft-Start | Reduces peak inrush current from ~700 mA to ~160 mA using external capacitor - prevents input rail collapse in current-limited supplies. |
| Error Flag with Programmable Delay | Provides synchronized power-good signaling with user-defined hold-off time - avoids false resets during transient load steps or brownouts. |
| Thermal Shutdown & Current Limit | Two-stage current limiting (0.58–1.4 A peak) plus junction-sensing thermal shutdown - ensures robust fault recovery without external protection circuits. |
| High-Voltage Input Rating | 60-V absolute maximum VIN (LM2597HV variant) - supports direct connection to unregulated 48-V telecom or 36-V automotive batteries. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converting 24-V vehicle battery or 48-V industrial bus to stable 12-V rail for microcontroller, CAN transceivers, and sensor interfaces. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, regulated 12-V supply with built-in fault signaling and soft-start. Use Value: Eliminates need for external undervoltage lockout or reset ICs due to integrated Error Flag and Delay pin functionality. |
Use Scenario: Powering door module ECUs requiring reliable 12-V supply under cold-crank (as low as 4.5 V) and load-dump (up to 60 V) conditions. IC Role / Device Role / Timing Role: High-input-voltage buck regulator with thermal/current protection and low-quiescent shutdown mode. Use Value: Maintains operation across full automotive voltage range while drawing only 140 μA in standby - critical for battery longevity. |
| Programmable Logic Controller (PLC) I/O Card | Telecom Remote Radio Unit (RRU) |
|
Use Scenario: Generating clean 12-V auxiliary rail from 48-V backplane for isolated digital I/O drivers and analog front-end circuitry. IC Role / Device Role / Timing Role: Compact, inductor-based buck converter with minimal external parts - simplifies layout on space-constrained I/O modules. Use Value: 150-kHz switching frequency allows use of standard 100-μH shielded inductors, reducing BOM cost and design cycle time. |
Use Scenario: Providing 12-V bias for RF power amplifiers in outdoor base stations powered from -48-V DC telecom supply (using inverting configuration). IC Role / Device Role / Timing Role: Configured as positive-to-negative converter (e.g., −12 V) with shutdown control referenced to system ground. Use Value: Supports inverting topology per Figure 24 in datasheet - delivers regulated negative rail without requiring dedicated inverting ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596HVM-12/NOPB | Higher 3-A output current rating; same 60-V max VIN, 150-kHz frequency, and pinout - but larger SOIC-8 package (6.2 mm × 4.9 mm) and higher quiescent current (5 mA vs. 140 μA). | Preferred where higher load current or improved thermal performance is required; less suitable for ultra-low-power standby applications. | Select LM2596HVM-12/NOPB if output current exceeds 0.5 A or board layout accommodates larger footprint. |
| TPS54202HDDCR | Synchronous buck controller (no external diode needed); 4.5–28-V input; 2-A output; 500-kHz switching; integrated FETs; no VBS or Error Flag pins. | Better suited for compact, high-efficiency designs with moderate input voltage - lacks HV input support and power-good signaling. | Choose TPS54202HDDCR for space-constrained 12-V rails from ≤28-V sources where efficiency >90% and small solution size are priorities. |
Compared with LM2597HVM-12/NOPB, LM2596HVM-12/NOPB offers higher current capacity at the expense of standby power and package size, while TPS54202HDDCR provides synchronous efficiency and integration but sacrifices HV input capability and fault-monitoring features essential for industrial/automotive environments.
Availability
LM2597HVM-12/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2597HVM-12/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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with broad industrial, automotive, and communications market reach.
The LM2597HV product line was designed as a rugged, easy-to-use SIMPLE SWITCHER® buck regulator family targeting high-input-voltage applications where reliability, minimal external components, and supervisory features outweigh the need for synchronous efficiency.
FAQ
What is the maximum input voltage rating for LM2597HVM-12/NOPB?
The LM2597HVM-12/NOPB has an absolute maximum input voltage of 60 V, confirmed in Section 7.1 Absolute Maximum Ratings of the TI SNVS119D datasheet. This HV rating distinguishes it from the standard LM2597 (45 V max) and enables direct use with 48-V industrial buses and automotive load-dump conditions. Operation above 40 V requires verification of thermal limits per RθJA = 95 °C/W (SOIC).
Does LM2597HVM-12/NOPB require external feedback resistors?
No, LM2597HVM-12/NOPB is a fixed-output version with internal 12-V feedback divider. Pin 4 (Feedback) is internally connected and must be left unconnected per datasheet Section 6 - unlike the adjustable LM2597MX-ADJ/NOPB, which requires external resistor networks to set VOUT. This simplifies design and improves output accuracy by eliminating resistor tolerance errors.
How does the Bias Supply (VBS) pin improve efficiency in LM2597HVM-12/NOPB?
The VBS pin on LM2597HVM-12/NOPB allows internal circuitry to be powered from the regulated 12-V output instead of the high-input voltage rail. As described in Section 8.3.1, this reduces power dissipation in the internal regulator - especially beneficial at VIN ≥ 36 V and light loads - yielding measurable efficiency gains (e.g., +3–5% shown in Figure 19 and Figure 20 of the datasheet).
Can LM2597HVM-12/NOPB be used in an inverting (positive-to-negative) configuration?
Yes, LM2597HVM-12/NOPB supports inverting operation per Figure 24 in the datasheet. By bootstrapping the GND pin to the negative output and grounding the Feedback pin, it regulates −12 V from a positive input. Critical constraints include limiting total voltage across the IC (|VIN| + |VOUT| ≤ 60 V) and using a Schottky catch diode - making it viable for telecom RRU bias supplies but requiring careful layout for stability.
What protection features are integrated into LM2597HVM-12/NOPB?
LM2597HVM-12/NOPB integrates thermal shutdown, two-stage current limiting (0.58–1.4 A peak), and undervoltage lockout (via Shutdown pin). It also provides an open-collector Error Flag output that asserts low when VOUT falls >5% below nominal - enabling system-level fault detection without external comparators. These features are fully documented in Sections 7.9 and 8.3 of the SNVS119D datasheet.
LM2597HVM-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 12V
- 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-12/NOPB FAQ
1.How can I place an order for LM2597HVM-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2597HVM-12/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 LM2597HVM-12/NOPB reliable?
The price and inventory of LM2597HVM-12/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2597HVM-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2597HVM-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2597HVM-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2597HVM-12/NOPB?
LM2597HVM-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2597HVM-12/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 LM2597HVM-12/NOPB?
For technical support, including LM2597HVM-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2597HVM-12/NOPB requirements.
6.How does Aetrix verify that LM2597HVM-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2597HVM-12/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 LM2597HVM-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2597HVM-12/NOPB?
All LM2597HVM-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2597HVM-12/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 LM2597HVM-12/NOPB part is unused and in its original packaging.
Return procedure for LM2597HVM-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2597HVM-12/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
