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

Texas Instruments LM2672M-ADJ/NOPB

Name: LM2672M-ADJ/NOPB
Brand: Texas Instruments
SKU: LM2672M-ADJ/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM2672M-ADJ/NOPB

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: LM2672M-ADJ/NOPB.pdf

Description:: IC REG BUCK ADJ 1A 8SOIC

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Product details

Overview

LM2672M-ADJ/NOPB from Texas Instruments is a monolithic step-down (buck) DC-DC switching regulator IC with integrated 1-A DMOS power MOSFET, adjustable output voltage range of 1.21 V to 37 V, ±1.5% output voltage tolerance over line and load, 260-kHz fixed-frequency oscillator, and thermal/current-limit protection. It serves as a high-efficiency (>90%) primary voltage regulator in industrial power supplies and embedded systems requiring stable 1-A output.

For engineers reviewing the LM2672M-ADJ/NOPB datasheet, LM2672M-ADJ/NOPB pinout, LM2672M-ADJ/NOPB application, or LM2672M-ADJ/NOPB equivalent, key selection criteria include its 8-pin SOIC package, 8 V–40 V input range, soft-start and frequency synchronization capability, and requirement for only five external components in typical buck designs.

Technical Context

The LM2672M-ADJ/NOPB implements a current-mode PWM control architecture with an internal 260-kHz oscillator, enabling stable regulation across wide input (8–40 V) and output (1.21–37 V) ranges. Its integrated high-side DMOS FET features 0.3 Ω typical R_DS(ON) at 25°C and supports up to 1.55 A current limit.

Functional blocks include a precision 1.21-V feedback reference amplifier, TTL-compatible ON/OFF enable with 50 μA standby current, soft-start via external capacitor, and SYNC input accepting external clocks up to 400 kHz - all operating within –40°C to +125°C junction temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Current	1 A continuous - supports full-load operation without external current boosting.
Input Voltage Range	8 V to 40 V - enables direct use with 12 V, 24 V, and 36 V industrial bus rails.
Output Voltage Range	1.21 V to 37 V - set via external resistor divider on FB pin; 1.21-V reference enables low-voltage logic rail generation.
Feedback Reference	1.21 V ±1.5% - defines output accuracy; determines minimum output voltage and sets divider ratio.
Switching Frequency	260 kHz (±10%) - enables compact LC filter design with standard off-the-shelf inductors and capacitors.
Efficiency	Up to 96% - reduces thermal stress; allows PCB copper traces alone to serve as heat sink under typical loads.
Quiescent Current	3.6 mA active, 50 μA standby - minimizes no-load power loss in battery-backed or energy-sensitive systems.

Pinout & Package

LM2672M-ADJ/NOPB is housed in an 8-pin SOIC (D) package measuring 5.00 mm × 6.20 mm, with exposed pad not present. Pin functions are validated per TI SNVS136L datasheet Section 6.

Pin/Terminal	Circuit Role	Design Meaning
1 CB	Bootstrap capacitor connection	Connects 100-nF ceramic capacitor to VSW to gate-drive high-side MOSFET fully ON; critical for low R_DS(ON) and efficiency.
2 SS	Soft-start timing input	Accepts external capacitor to GND; controls output voltage ramp rate and prevents inrush current during startup.
3 SYNC	External clock synchronization input	Accepts TTL/CMOS clock >260 kHz; enables EMI control and multi-regulator phase alignment.
4 FB	Feedback sense input	Monitors output via resistor divider; 1.21-V reference sets regulated output voltage precisely.
5 ON/OFF	Enable/disable control input	TTL-compatible; <1.4 V disables regulator with 50 μA standby current; floating or >1.4 V enables operation.
6 GND	Power ground	Main return path for input/output capacitors and inductor; must be short, low-inductance connection to minimize noise.
7 VIN	Input supply connection	Connects to 8–40 V source and high-frequency input capacitor; high-current path requiring minimal trace inductance.
8 VSW	Switch node output	Drives external inductor and catch diode; swings between VIN and ~−0.5 V; requires tight layout to reduce EMI and ringing.

Key Features

Feature	Design Value
Integrated 1-A DMOS power switch	Eliminates need for external MOSFET and driver; reduces BOM count and layout complexity in buck converters.
Patented internal frequency compensation	Enables stable loop response with minimal external components - no external compensation network required.
Frequency synchronization input	Allows precise ripple frequency control for EMI filtering and multi-rail system coordination without changing component values.
TTL shutdown with 50-μA standby	Supports low-power sleep modes in portable or always-on equipment while maintaining fast wake-up capability.
Thermal shutdown + cycle-by-cycle current limit	Provides robust fault protection against overload, short-circuit, and overheating without external sensing circuitry.

Applications

Industrial Power Supply	Automotive Body Control Module
Use Scenario: Converting 24 V vehicle battery or 24 V industrial bus to 3.3 V or 5 V for microcontrollers and sensors. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering regulated 1-A output with input transient immunity up to 40 V. Use Value: High efficiency (>90%) minimizes heat buildup in enclosed enclosures; wide input range accommodates cold-crank and load-dump conditions.	Use Scenario: Powering CAN transceiver, LIN interface, and EEPROM in body electronics modules. IC Role / Device Role / Timing Role: Point-of-load regulator supplying clean, low-noise 5 V or adjustable logic voltage with soft-start to prevent reset glitches. Use Value: 50 μA standby current extends battery life in sleep mode; SYNC input enables synchronized switching to avoid CAN bus interference.
Programmable Logic Controller (PLC) I/O Module	Test & Measurement Equipment
Use Scenario: Generating isolated or non-isolated auxiliary rails (e.g., ±12 V, 5 V, 3.3 V) from 24 V backplane in modular PLC chassis. IC Role / Device Role / Timing Role: Compact, thermally efficient buck stage feeding downstream LDOs or isolated DC-DC converters. Use Value: 8-pin SOIC footprint simplifies layout in space-constrained modules; thermal shutdown ensures reliability during field faults.	Use Scenario: Providing stable, low-noise bias voltages for analog front-ends, ADC references, and op-amp supplies in bench instruments. IC Role / Device Role / Timing Role: Adjustable-output buck regulator configured for precise 2.5 V, 3.0 V, or 4.096 V reference rails using high-accuracy resistors. Use Value: ±1.5% output tolerance and low feedback bias current (85 nA) preserve reference accuracy; soft-start prevents measurement settling errors.

Industrial Power Supply

Automotive Body Control Module

Use Scenario: Converting 24 V vehicle battery or 24 V industrial bus to 3.3 V or 5 V for microcontrollers and sensors.

IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering regulated 1-A output with input transient immunity up to 40 V.

Use Value: High efficiency (>90%) minimizes heat buildup in enclosed enclosures; wide input range accommodates cold-crank and load-dump conditions.

Use Scenario: Powering CAN transceiver, LIN interface, and EEPROM in body electronics modules.

IC Role / Device Role / Timing Role: Point-of-load regulator supplying clean, low-noise 5 V or adjustable logic voltage with soft-start to prevent reset glitches.

Use Value: 50 μA standby current extends battery life in sleep mode; SYNC input enables synchronized switching to avoid CAN bus interference.

Programmable Logic Controller (PLC) I/O Module

Test & Measurement Equipment

Use Scenario: Generating isolated or non-isolated auxiliary rails (e.g., ±12 V, 5 V, 3.3 V) from 24 V backplane in modular PLC chassis.

IC Role / Device Role / Timing Role: Compact, thermally efficient buck stage feeding downstream LDOs or isolated DC-DC converters.

Use Value: 8-pin SOIC footprint simplifies layout in space-constrained modules; thermal shutdown ensures reliability during field faults.

Use Scenario: Providing stable, low-noise bias voltages for analog front-ends, ADC references, and op-amp supplies in bench instruments.

IC Role / Device Role / Timing Role: Adjustable-output buck regulator configured for precise 2.5 V, 3.0 V, or 4.096 V reference rails using high-accuracy resistors.

Use Value: ±1.5% output tolerance and low feedback bias current (85 nA) preserve reference accuracy; soft-start prevents measurement settling errors.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM2671M-ADJ/NOPB	3-A output current, same 260-kHz frequency and pinout, but larger thermal footprint required.	Suitable where higher load current is needed; not drop-in due to different current-sense and thermal design requirements.	Select when >1 A output is required and board layout allows for increased thermal management.
TPS54202DRCT	2-A synchronous buck, 4.5–28 V input, 500-kHz switching, integrated high/low-side FETs, smaller 10-pin WSON package.	Better suited for compact, high-density designs; lacks SYNC and soft-start pins; requires different compensation.	Prefer for space-constrained, higher-frequency designs where synchronous rectification improves light-load efficiency.

Compared with LM2672M-ADJ/NOPB, LM2671M-ADJ/NOPB delivers higher current but demands more PCB area and thermal margin, while TPS54202DRCT offers smaller size and synchronous operation at the cost of reduced feature parity (no SYNC, no soft-start pin, different feedback structure).

Availability

LM2672M-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and programmable logic controller I/O modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance.

Supply support for LM2672M-ADJ/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 and automotive reach.

The LM2672 series belongs to TI's SIMPLE SWITCHER® power converter family, designed specifically for ease-of-use in non-isolated DC-DC buck applications where minimal external components, high efficiency, and robust protection are prioritized over ultra-high density or digital control.

FAQ

What is the maximum input voltage rating for the LM2672M-ADJ/NOPB?

The absolute maximum input voltage for LM2672M-ADJ/NOPB is 45 V, but the recommended operating range is 8 V to 40 V. Operation above 40 V risks exceeding safe operating area limits and may trigger thermal shutdown or damage the internal DMOS switch. For sustained reliability, keep VIN ≤ 40 V under all conditions including transients.

How does the feedback pin (FB) function in the LM2672M-ADJ/NOPB?

The FB pin of LM2672M-ADJ/NOPB senses the output voltage via an external resistor divider and compares it to an internal 1.21-V precision reference. The error amplifier drives the PWM controller to maintain regulation. For the adjustable version, the output voltage is calculated as V_OUT = 1.21 V × (1 + R1/R2), where R1 connects to V_OUT and R2 connects to GND.

Can the LM2672M-ADJ/NOPB synchronize to an external clock, and what are the requirements?

Yes, LM2672M-ADJ/NOPB supports external clock synchronization via the SYNC pin. The external clock must exceed 260 kHz (up to 400 kHz), be TTL/CMOS compatible (0–>3 V), and be AC-coupled using a 100-pF capacitor and 1-kΩ pull-down resistor. When enabled, internal oscillator is disabled, but current-limit frequency foldback is deactivated - short-circuit protection remains via cycle-by-cycle current limiting.

What is the purpose of the CB pin on the LM2672M-ADJ/NOPB, and what capacitor value is recommended?

CB is the bootstrap capacitor terminal for the high-side MOSFET gate drive. It must be connected to the VSW pin with a 100-nF ceramic capacitor (X7R or C0G, 50 V rating). This capacitor charges during the low-side conduction phase and provides the gate-source voltage needed to fully enhance the high-side DMOS FET, minimizing conduction losses and sustaining >90% efficiency.

Does the LM2672M-ADJ/NOPB require external compensation components?

No, LM2672M-ADJ/NOPB incorporates patented internal frequency compensation, eliminating the need for external compensation networks. This simplifies design and ensures stable operation with the standard 5-component configuration (input cap, output cap, inductor, catch diode, and FB divider). Layout best practices - especially short GND and VIN paths - remain essential for stability and noise control.

LM2672M-ADJ/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:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 6.5V

Voltage - Input (Max):: 40V

Voltage - Output (Min/Fixed):: 1.21V

Voltage - Output (Max):: 37V

Current - Output:: 1A

Frequency - Switching:: 260kHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

LM2672M-ADJ/NOPB FAQ

1.How can I place an order for LM2672M-ADJ/NOPB through Aetrix?

Please submit a Request for Quotation (RFQ) for LM2672M-ADJ/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 LM2672M-ADJ/NOPB reliable?

The price and inventory of LM2672M-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2672M-ADJ/NOPB is usually 5 days.

3.What payment methods are accepted for LM2672M-ADJ/NOPB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2672M-ADJ/NOPB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM2672M-ADJ/NOPB?

LM2672M-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM2672M-ADJ/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 LM2672M-ADJ/NOPB?

For technical support, including LM2672M-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2672M-ADJ/NOPB requirements.

6.How does Aetrix verify that LM2672M-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?

All LM2672M-ADJ/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 LM2672M-ADJ/NOPB meets industry standards.

7.What is the process for return or replacement of LM2672M-ADJ/NOPB?

All LM2672M-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2672M-ADJ/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 LM2672M-ADJ/NOPB part is unused and in its original packaging.

Return procedure for LM2672M-ADJ/NOPB:

1.Submit a request within 90 days.

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

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