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Texas Instruments LM22676QMRE-ADJ/NOPB
- Part No.:
- LM22676QMRE-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22676QMRE-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:521
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Product details
Overview
LM22676QMRE-ADJ/NOPB from Texas Instruments is a 42 V, 3 A adjustable-output synchronous step-down DC/DC regulator in an exposed-pad HSOP-8 package, featuring 500 kHz fixed-frequency voltage-mode control, ±1.5% feedback reference accuracy (1.285 V), and integrated bootstrap diode - used in industrial power rails converting 24 V or 12 V to sub-5 V logic supplies.
For engineers reviewing the LM22676QMRE-ADJ/NOPB datasheet, LM22676QMRE-ADJ/NOPB pinout, LM22676QMRE-ADJ/NOPB application, or LM22676QMRE-ADJ/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance with PowerPAD, soft-start timing (500 µs), enable threshold hysteresis (0.6 V), and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22676QMRE-ADJ/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across wide VIN variations, enabling optimized transient response without external compensation. Its internal Type III compensation network is tuned for stable operation with output voltages ≤5 V.
It integrates a 120 mΩ N-channel MOSFET switch, bootstrap gate driver with dedicated BOOT pin, precision enable input (1.6 V turn-on threshold, 0.6 V hysteresis), and thermal shutdown at 150°C. Minimum on-time (100 ns) and off-time (200 ns) constrain practical VIN/VOUT ratios and mandate ≥5 mA minimum load for boot-cap recharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct regulation from 24 V industrial rails and automotive battery transients. |
| Output Current | Up to 3 A continuous - sufficient for FPGA core, DSP, or microcontroller power domains. |
| Feedback Reference | 1.285 V ±1.5% - sets minimum adjustable output; enables precise 3.3 V, 2.5 V, or 1.8 V generation via resistor divider. |
| Switching Frequency | 500 kHz ±20% - allows compact 10 µH inductors and <100 µF ceramic output capacitance. |
| RDS(ON) | 120 mΩ (PFM package) - limits conduction loss at 3 A to ~1.08 W, requiring thermal pad for >1.5 A sustained loads. |
| Quiescent Current | 3.4 mA typical at VFB = 5 V - balances light-load efficiency and startup speed in always-on subsystems. |
| Standby Current | 25 µA typical in shutdown - enables ultra-low-power system-level sequencing and battery backup modes. |
Pinout & Package
LM22676QMRE-ADJ/NOPB uses an HSOP-8 (PowerPAD™) package with 4.89 mm × 3.90 mm body and thermally enhanced exposed copper pad soldered to PCB ground plane for junction-to-board thermal resistance of 22°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Drives external inductor; swings from GND to VIN; requires low-inductance layout and Schottky catch diode. |
| 2 VIN | Main input supply | Accepts 4.5–42 V; must be decoupled with ≥10 µF low-ESR capacitor near pin. |
| 3 BOOT | Bootstrap supply | Connects to SW via 10 nF ceramic capacitor; powers high-side gate driver; requires minimum off-time for recharge. |
| 4 GND | System ground | Analog and power ground reference; tied to exposed pad for thermal and EMI control. |
| 5 FB | Feedback input | High-impedance (230 nA bias) node sensing output voltage via resistor divider; sensitive to noise. |
| 6 EN | Enable control | Logic-compatible input (1.6 V turn-on, 0.6 V hysteresis); pulls up internally at 6 µA; supports external UVLO. |
| 7 NC | No connect | Thermal pad conductor only; not electrically bonded; must remain unconnected in circuit design. |
| 8 NC | No connect | Thermal pad conductor only; no electrical function; connects to GND via PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates need for external compensation components; stable with standard 10 µH/47 µF ceramic LC networks. |
| Integrated bootstrap diode | Removes external bootstrap diode requirement; reduces BOM count and layout area in HSOP-8 footprint. |
| Stable with low-ESR ceramic capacitors | Enables use of compact, high-reliability X7R/X5R MLCCs instead of bulkier electrolytics or tantalums. |
| Precision enable with UVLO support | Allows clean power sequencing and programmable undervoltage lockout using simple resistor dividers from VIN. |
| Fixed 500 kHz switching frequency | Provides predictable EMI profile and simplifies filter design; avoids audible noise in sensitive applications. |
| Thermal shutdown & current limiting | Protects against overload and PCB overheating; latches off until junction cools to ~135°C; prevents catastrophic failure. |
Applications
| Industrial Control PLC I/O Module | Telecom Line Card Power |
|---|---|
Use Scenario: Regulating 24 V backplane to 3.3 V for isolated digital I/O drivers and ADC front-ends in harsh factory environments. IC Role / Device Role / Timing Role: Primary buck converter delivering tightly regulated 3.3 V at up to 2.5 A with high line/load regulation (>90% efficiency). Use Value: Maintains ±1.5% output accuracy over –40°C to +125°C junction temperature, ensuring sensor data integrity and logic reliability. |
Use Scenario: Generating 5 V from –48 V telecom supply (via intermediate 12 V stage) for Ethernet PHY and management MCU. IC Role / Device Role / Timing Role: Secondary buck regulator accepting 12 V input to produce low-noise 5 V for high-speed serial interfaces. Use Value: 500 kHz fixed frequency enables small 4.7 µH inductor and avoids interference with 10/100/1000BASE-T clock harmonics. |
| Automotive Body Control Module | Embedded System Power Subsystem |
Use Scenario: Converting 12 V battery rail to 2.5 V for CAN transceiver and microcontroller core in AEC-Q100 Grade 1 qualified systems. IC Role / Device Role / Timing Role: Automotive-grade buck regulator with extended temperature range (–40°C to +125°C) and robust EN/UVLO sequencing. Use Value: Precision enable threshold (1.6 V) and hysteresis (0.6 V) allow reliable cold-crank operation down to 6 V battery input. |
Use Scenario: Providing 1.8 V core voltage for ARM Cortex-M7 processor in space-constrained edge AI gateway. IC Role / Device Role / Timing Role: Adjustable-output buck converter configured with 1.54 kΩ/976 Ω divider to deliver 1.8 V at 1.2 A. Use Value: Internal soft-start (500 µs) prevents inrush current during hot-plug events and ensures deterministic boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670MR-ADJ/NOPB | Lower 37 V max input, same 3 A rating and 500 kHz frequency; uses SO PowerPAD (DDA) package with RθJA = 60°C/W. | Limited to 37 V input systems; less suitable for 42 V industrial transients or 48 V telecom intermediate rails. | Select when input never exceeds 37 V and thermal budget allows higher junction rise. |
| TPS54302DDAR | 4.5–28 V input, 3 A, 500 kHz, but requires external compensation; no integrated bootstrap diode; smaller 8-pin SOIC package. | Needs external RC network for stability; demands careful loop tuning; lacks internal boot diode, increasing BOM count. | Choose when board space is critical and design team has expertise in compensating voltage-mode controllers. |
Compared with LM22676QMRE-ADJ/NOPB, LM22670MR-ADJ/NOPB trades input voltage headroom for identical functionality in lower-voltage systems, while TPS54302DDAR offers smaller footprint at the cost of added design complexity and external component requirements.
Availability
LM22676QMRE-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and automotive body electronics requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM22676QMRE-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 leader specializing in analog, embedded processing, and power management technologies, with decades of experience in high-reliability power conversion ICs.
The LM22676QMRE-ADJ/NOPB belongs to TI's SIMPLE SWITCHER® family - designed for ease-of-use in rugged industrial and automotive applications where minimal external components, internal compensation, and thermal robustness are essential.
FAQ
What is the minimum output voltage achievable with LM22676QMRE-ADJ/NOPB?
The LM22676QMRE-ADJ/NOPB has a nominal feedback reference voltage of 1.285 V with ±1.5% accuracy over temperature, making 1.285 V the lowest guaranteed output voltage. It can be set to precisely 1.285 V, 1.8 V, 2.5 V, 3.3 V, or other values above this threshold using an external resistor divider on the FB pin. The LM22676QMRE-ADJ/NOPB does not support outputs below 1.285 V.
Does LM22676QMRE-ADJ/NOPB require an external bootstrap diode?
No, the LM22676QMRE-ADJ/NOPB integrates a bootstrap diode internally, eliminating the need for an external component between BOOT and SW pins. This simplifies layout and reduces BOM count. A 10 nF ceramic capacitor must still be placed directly between BOOT and SW with short, low-inductance traces to ensure proper gate drive for the internal N-channel MOSFET.
What thermal considerations apply to LM22676QMRE-ADJ/NOPB in HSOP-8 PowerPAD package?
The LM22676QMRE-ADJ/NOPB in HSOP-8 (NDR) package has a junction-to-ambient thermal resistance (RθJA) of 22°C/W when the exposed pad is properly soldered to a ≥1-in² copper pour connected to GND. At 3 A load and 12 V input, power dissipation reaches ~1.1 W; without adequate thermal relief, junction temperature may exceed 125°C. The LM22676QMRE-ADJ/NOPB includes thermal shutdown at 150°C to prevent damage.
Can LM22676QMRE-ADJ/NOPB operate with ceramic output capacitors only?
Yes, the LM22676QMRE-ADJ/NOPB is explicitly characterized and stabilized for use with low-ESR ceramic capacitors - including X7R and X5R MLCCs - without requiring additional ESR or damping components. TI recommends ≥47 µF total ceramic output capacitance for optimal transient response and stability across the full 4.5–42 V input range.
How does the enable pin (EN) function on LM22676QMRE-ADJ/NOPB?
The EN pin on LM22676QMRE-ADJ/NOPB provides precision enable control with a 1.6 V typical turn-on threshold and 0.6 V hysteresis. Pulling EN below 1.6 V disables the regulator, reducing quiescent current to 25 µA. An internal 6 µA pullup allows direct connection to VIN for always-on operation, or to a resistor divider for programmable UVLO. The LM22676QMRE-ADJ/NOPB must never see >6 V on EN.
LM22676QMRE-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 1.285V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 3A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM22676QMRE-ADJ/NOPB FAQ
1.How can I place an order for LM22676QMRE-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22676QMRE-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 LM22676QMRE-ADJ/NOPB reliable?
The price and inventory of LM22676QMRE-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 LM22676QMRE-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22676QMRE-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22676QMRE-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22676QMRE-ADJ/NOPB?
LM22676QMRE-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22676QMRE-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 LM22676QMRE-ADJ/NOPB?
For technical support, including LM22676QMRE-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22676QMRE-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22676QMRE-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22676QMRE-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 LM22676QMRE-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22676QMRE-ADJ/NOPB?
All LM22676QMRE-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22676QMRE-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 LM22676QMRE-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22676QMRE-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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