My Inquiry
My Account
Texas Instruments LM2672MX-ADJ/E7000820
- Part No.:
- LM2672MX-ADJ/E7000820
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2672MX-ADJ/E7000820.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,798
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2672MX-ADJ/E7000820 from Texas Instruments is a monolithic step-down (buck) DC-DC switching regulator IC delivering up to 1 A output current with adjustable output voltage (1.21 V to 37 V), 260-kHz fixed-frequency operation, ±1.5% output voltage tolerance over line and load, and 90% typical efficiency at 12-V input/1-A load. It serves as a primary power conversion stage in industrial power supplies and distributed DC systems.
For engineers reviewing the LM2672MX-ADJ/E7000820 datasheet, LM2672MX-ADJ/E7000820 pinout, LM2672MX-ADJ/E7000820 application, or LM2672MX-ADJ/E7000820 equivalent, key selection criteria include its 8-V to 40-V wide input range, internal DMOS power switch with 0.3-Ω typical RDS(ON), soft-start control via external capacitor, TTL-compatible ON/OFF enable, and synchronization capability for EMI-sensitive designs.
Technical Context
The LM2672MX-ADJ/E7000820 integrates a fixed-frequency PWM controller, internal 260-kHz oscillator, high-side DMOS power switch, and feedback amplifier with 1.21-V reference. Its architecture uses voltage-mode control with internal frequency compensation, eliminating need for external loop compensation components.
It operates in continuous conduction mode (CCM) across full 1-A load range at typical input voltages, supports external frequency synchronization above 260 kHz, and implements cycle-by-cycle current limiting (1.25–2.1 A) plus thermal shutdown for fault protection. The FB pin senses output voltage via external resistor divider, enabling precise regulation of any output within 1.21 V–37 V range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A maximum continuous - supports single-rail loads such as microcontrollers, FPGAs, and analog subsystems 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 and battery systems. |
| Output Voltage Range | 1.21 V to 37 V (adjustable) - set via external resistor divider on FB pin; 1.21-V reference allows low-voltage logic rail generation. |
| Switching Frequency | 260 kHz fixed - permits use of compact, low-ESR ceramic or tantalum output capacitors and standard 47–68-μH inductors. |
| Efficiency | 90% typical at VIN = 12 V, IOUT = 1 A - reduces thermal load on PCB; copper traces suffice as heat sink under normal operation. |
| Feedback Tolerance | ±1.5% over line/load/temp - ensures stable regulation across industrial temperature range (–40°C to 125°C). |
| Standby Current | 50 μA typical - enables ultra-low-power shutdown in battery-backed or energy-conscious systems. |
Pinout & Package
LM2672MX-ADJ/E7000820 is packaged in an 8-pin SOIC (D package) with 5.00 mm × 6.20 mm body size and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CB | Bootstrap capacitor connection | Connects 100-nF ceramic capacitor to VSW to gate-drive high-side DMOS switch fully ON; critical for minimizing RDS(ON) and conduction loss. |
| 2 SS | Soft-start control | Accepts external capacitor to linearly ramp output voltage at startup; prevents inrush current and overshoot during power-up. |
| 3 SYNC | Frequency synchronization input | Accepts external TTL/CMOS clock >260 kHz to align switching frequency; enables EMI filtering predictability and multi-regulator phase control. |
| 4 FB | Feedback sense input | High-impedance (85 nA bias) input referenced to 1.21 V; connects to resistor divider to set output voltage precisely across temperature and load. |
| 5 ON/OFF | Enable/disable control | TTL-compatible input: <1.4 V disables regulator (50 μA standby); >1.4 V enables operation; internal 20-μA pullup allows floating for always-on use. |
| 6 GND | Power ground | Primary return path for high-current switch node and input/output capacitors; must be short, low-inductance connection to minimize noise and instability. |
| 7 VIN | Main power input | Accepts 8–40 V DC; connects directly to high-frequency input bypass capacitor (CIN) to suppress switching transients and supply ripple. |
| 8 VSW | Switch node output | Drives external inductor and Schottky catch diode; swings between VIN and ~–0.5 V; requires tight layout to reduce EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DMOS power switch | 0.3 Ω typical RDS(ON) at 25°C - enables high-efficiency 1-A conversion without external MOSFET or driver complexity. |
| Internal frequency compensation | Patented compensation eliminates need for external Type II/III compensation network - simplifies design and improves stability margin. |
| Thermal shutdown + current limit | Combines cycle-by-cycle current limiting (1.25–2.1 A) and thermal cutoff (>150°C) - provides robust fault protection without external circuitry. |
| Soft-start and sync capability | SS pin controls startup slew rate; SYNC pin accepts external clock >260 kHz - supports deterministic power sequencing and EMI-controlled system timing. |
| Low-quiescent-current shutdown | 50 μA typical standby current - preserves battery life in portable or always-on monitoring equipment during inactive periods. |
Applications
| Industrial Motor Drive Power Supply | Programmable Logic Controller (PLC) I/O Module |
|---|---|
|
Use Scenario: Converts 24-V DC field bus to regulated 5-V or 3.3-V logic supply for digital I/O conditioning circuits. IC Role / Device Role / Timing Role: Primary buck converter providing isolated, low-noise, tightly regulated auxiliary rail with fast transient response. Use Value: Delivers 1-A continuous current with ±1.5% regulation across –40°C to 85°C ambient, supporting reliable operation in harsh factory environments. |
Use Scenario: Powers FPGA configuration circuitry and analog sensor front-ends in modular PLC backplanes. IC Role / Device Role / Timing Role: Adjustable-output DC-DC regulator generating user-configurable rail (e.g., 1.8 V, 2.5 V, 3.3 V) from shared 12-V or 24-V backplane. Use Value: 1.21-V reference and resistor-divider programming enable precise rail matching to diverse ASIC/FPGA core requirements without redesign. |
| Telecom Remote Radio Unit (RRU) | Test & Measurement Equipment Power Stage |
|
Use Scenario: Generates stable 12-V intermediate rail from 48-V telecom rectifier output for RF amplifier bias and control logic. IC Role / Device Role / Timing Role: High-input-voltage buck regulator operating at 260 kHz to minimize filter size while meeting strict EMI Class B limits. Use Value: SYNC pin allows synchronization to system master clock, eliminating beat frequencies and easing conducted/radiated emissions compliance. |
Use Scenario: Supplies precision analog circuitry (DACs, ADCs, op-amps) requiring low-noise, well-regulated ±5 V or ±12 V rails. IC Role / Device Role / Timing Role: Pre-regulator feeding low-dropout linear regulators (LDOs) to achieve ultra-low output ripple and high PSRR. Use Value: 90% efficiency at 1-A load minimizes thermal drift in sensitive analog sections; soft-start prevents measurement offset during 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 |
|---|---|---|---|
| LM2671MX-ADJ/NOPB | 3-A output current rating; same 260-kHz frequency and pinout; higher RDS(ON) (0.4 Ω typ) and quiescent current (5 mA). | Better suited for higher-current loads where board space allows larger inductor/capacitor; less efficient at light loads due to higher IQ. | Select when >1 A output is required and thermal headroom exists; verify inductor saturation current exceeds 3 A peak. |
| TPS54202DRCT | 2-A synchronous buck; 400–2500-kHz adjustable frequency; integrated high/low-side MOSFETs; 2.5-V to 6-V input only. | Requires lower input voltage; supports smaller magnetics and faster transient response; lacks SYNC and soft-start pins. | Prefer for compact, high-frequency designs powered from 3.3-V or 5-V rails; not suitable for 8–40-V industrial inputs. |
Compared with LM2671MX-ADJ/NOPB, LM2672MX-ADJ/E7000820 offers lower quiescent current and better light-load efficiency but half the output current; versus TPS54202DRCT, it supports wider input range and external synchronization but requires an external Schottky diode and has fixed frequency.
Availability
LM2672MX-ADJ/E7000820 is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers, telecom remote radio units, and test & measurement equipment requiring stable component supply and long-term production continuity.
Supply support for LM2672MX-ADJ/E7000820 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 specializing in analog, embedded processing, and power management technologies, with decades of leadership in high-reliability power conversion ICs.
The LM2672MX-ADJ/E7000820 belongs to TI's SIMPLE SWITCHER® family, designed specifically for ease-of-use, minimal external component count, and robust performance in industrial, automotive, and communications power systems.
FAQ
What is the minimum input voltage required for stable operation of the LM2672MX-ADJ/E7000820?
The LM2672MX-ADJ/E7000820 specifies a recommended minimum input voltage of 6.5 V, though stable regulation is guaranteed down to 8 V across full load and temperature range per datasheet Section 7.3. Operation below 8 V may cause dropout or reduced current capability depending on output voltage setting and duty cycle constraints.
Can the LM2672MX-ADJ/E7000820 be synchronized to an external clock, and what are the voltage requirements?
Yes, the LM2672MX-ADJ/E7000820 supports external synchronization via its SYNC pin. The external clock must exceed the internal 260-kHz oscillator frequency (up to 275 kHz), be TTL- or CMOS-compatible (0 V to >3 V), and be AC-coupled using a 100-pF capacitor and 1-kΩ pull-down resistor per Section 9.3.3 of the datasheet.
What is the purpose of the CB pin on the LM2672MX-ADJ/E7000820, and what capacitor value is recommended?
The CB pin on the LM2672MX-ADJ/E7000820 connects to the VSW node through a bootstrap capacitor that supplies gate drive voltage above VIN to fully enhance the internal high-side DMOS switch. TI recommends a 0.01-μF (10 nF), 50-V ceramic capacitor placed as close as possible to the CB and VSW pins to ensure low-loss switching and sustained 90%+ efficiency.
How does the soft-start function work on the LM2672MX-ADJ/E7000820, and how is it configured?
The LM2672MX-ADJ/E7000820 implements soft-start by charging an external capacitor connected between the SS pin and GND. The internal 4.5-μA current source ramps the SS voltage, which controls the PWM duty cycle ramp rate. A typical 100-nF capacitor yields ~22-ms startup time; leaving SS open disables soft-start entirely.
What protection features are built into the LM2672MX-ADJ/E7000820, and how do they operate?
The LM2672MX-ADJ/E7000820 integrates cycle-by-cycle current limiting (1.25–2.1 A), thermal shutdown (>150°C junction), and under-voltage lockout. During overload, the switch turns off immediately upon current threshold crossing; during overtemperature, internal thermal sensing disables switching until safe junction temperature is restored.
LM2672MX-ADJ/E7000820 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
LM2672MX-ADJ/E7000820 FAQ
1.How can I place an order for LM2672MX-ADJ/E7000820 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2672MX-ADJ/E7000820 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 LM2672MX-ADJ/E7000820 reliable?
The price and inventory of LM2672MX-ADJ/E7000820 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2672MX-ADJ/E7000820 is usually 5 days.
3.What payment methods are accepted for LM2672MX-ADJ/E7000820?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2672MX-ADJ/E7000820 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2672MX-ADJ/E7000820?
LM2672MX-ADJ/E7000820 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2672MX-ADJ/E7000820 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 LM2672MX-ADJ/E7000820?
For technical support, including LM2672MX-ADJ/E7000820 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2672MX-ADJ/E7000820 requirements.
6.How does Aetrix verify that LM2672MX-ADJ/E7000820 is sourced from the original manufacturer or authorized distributors?
All LM2672MX-ADJ/E7000820 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 LM2672MX-ADJ/E7000820 meets industry standards.
7.What is the process for return or replacement of LM2672MX-ADJ/E7000820?
All LM2672MX-ADJ/E7000820 units undergo pre-shipment inspection (PSI). If there is an issue with LM2672MX-ADJ/E7000820, 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 LM2672MX-ADJ/E7000820 part is unused and in its original packaging.
Return procedure for LM2672MX-ADJ/E7000820:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2672MX-ADJ/E7000820 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…
