My Inquiry
My Account
Texas Instruments LM22676QMRX-ADJ/NOPB
- Part No.:
- LM22676QMRX-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22676QMRX-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,359
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM22676QMRX-ADJ/NOPB from Texas Instruments is an automotive-grade 42 V, 3 A synchronous step-down DC/DC regulator in PSOP-8 (PFM) package with adjustable output (1.285 V min), 500 kHz fixed switching frequency, ±1.5% feedback reference accuracy, and integrated bootstrap diode. It delivers high efficiency (>90%) in industrial power supplies converting 24 V/12 V input rails to sub-5 V logic rails.
For engineers reviewing the LM22676QMRX-ADJ/NOPB datasheet, LM22676QMRX-ADJ/NOPB pinout, LM22676QMRX-ADJ/NOPB application, or LM22676QMRX-ADJ/NOPB equivalent, key selection criteria include AEC-Q100 Grade 1 qualification (–40°C to +125°C), internal voltage-mode compensation for ceramic-capacitor stability, precision enable with 1.6 V threshold and 0.6 V hysteresis, and thermal shutdown at 150°C.
Technical Context
The LM22676QMRX-ADJ/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across wide VIN ranges (4.5 V–42 V). Its internal Type III compensation network is optimized for output voltages ≤5 V and eliminates external compensation components.
It integrates a 100 mΩ N-channel MOSFET switch, bootstrap gate driver with integrated diode, soft-start (500 µs typ), and precision enable with UVLO (rising threshold 4.3 V). Current limiting (3.4–5.3 A) and thermal shutdown (150°C trip) provide robust overload protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to 24 V/12 V industrial and automotive battery rails without pre-regulation. |
| Output Current | 3 A continuous - sustains full load under worst-case thermal conditions (RθJA = 22°C/W in PSOP-8). |
| Feedback Reference | 1.285 V ±1.5% - sets minimum adjustable output; enables precise low-voltage rail generation (e.g., 1.8 V, 3.3 V) with external resistor divider. |
| Switching Frequency | 500 kHz (±20%) - enables compact magnetics and capacitors while maintaining fast transient response. |
| MOSFET RDS(ON) | 100 mΩ (typ) - reduces conduction loss and improves efficiency at 3 A load, especially at high duty cycles. |
| Enable Threshold | 1.6 V (typ), 0.6 V hysteresis - allows clean power sequencing using simple resistor dividers from upstream rails. |
| Quiescent Current | 3.4 mA (typ) - minimizes no-load power loss in always-on subsystems; drops to 25 µA in shutdown. |
Pinout & Package
LM22676QMRX-ADJ/NOPB uses the PSOP-8 (PFM) package: 4.89 mm × 3.90 mm body with exposed pad thermally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node output | Drives external inductor; swings from ~0 V to VIN; requires low-inductance layout to minimize EMI and ringing. |
| 2 VIN | Main power input | Supplies IC bias and high-side gate driver; must be decoupled with ≥10 µF ceramic capacitor near pin. |
| 3 BOOT | Bootstrap supply | Connects to SW via 10 nF ceramic capacitor; provides floating gate drive voltage for internal N-FET. |
| 4 GND | System ground | Power and signal return; exposed pad must be soldered to large PCB GND plane for thermal and EMI performance. |
| 5 FB | Feedback input | High-impedance (230 nA bias) node sensing output voltage via resistor divider; sensitive to noise-route away from SW. |
| 6 EN | Enable control | Logic-level input: <1.6 V disables regulator (25 µA IQ); >2.2 V enables; internal 6 µA pullup allows single-resistor turn-on. |
| 7 NC | No connect | Not electrically bonded; serves as thermal conductor-connect to GND plane per layout guidelines. |
| 8 NC | No connect | Not electrically bonded; serves as thermal conductor-connect to GND plane per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode, reducing BOM count and layout area while ensuring reliable gate drive during startup and light loads. |
| Internal Type III compensation | Enables stable operation with low-ESR ceramic output capacitors (no electrolytic required) and removes need for external compensation network. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications operating from –40°C to +125°C junction temperature, including engine control and ADAS subsystems. |
| 500 µs soft-start | Prevents inrush current and output overshoot during power-up; fixed duration-no external capacitor needed. |
| Precision enable with UVLO | Allows controlled power sequencing and external undervoltage lockout down to user-defined thresholds (e.g., battery discharge cutoff). |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converting 24 V vehicle battery to 3.3 V for microcontroller and CAN transceiver in body electronics. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, low-noise 3.3 V rail with tight regulation under load transients. Use Value: AEC-Q100 qualification ensures reliability across temperature extremes; 500 kHz switching enables small 2.2 µH inductor and 22 µF ceramic output cap. |
Use Scenario: Generating 1.8 V core voltage for ARM-based domain controller in centralized gateway unit. IC Role / Device Role / Timing Role: Adjustable-output buck converter delivering regulated 1.8 V from 12 V battery rail with ±1.5% accuracy. Use Value: 1.285 V reference and internal compensation allow stable 1.8 V output using only two resistors-no loop tuning required. |
| Telecom Remote Radio Unit | Factory Automation Sensor Hub |
|
Use Scenario: Stepping down 48 V PoE-derived input to 5 V for FPGA configuration and interface ICs in outdoor RRUs. IC Role / Device Role / Timing Role: High-input-voltage buck regulator handling wide line variation (4.5 V–42 V) and load steps up to 3 A. Use Value: 42 V absolute max rating and 100 mΩ RDS(ON) sustain efficiency >88% at 42 VIN/5 VOUT, minimizing thermal stress in sealed enclosures. |
Use Scenario: Powering multiple 3.3 V I/O expanders and analog front-ends from 24 V factory bus in modular sensor nodes. IC Role / Device Role / Timing Role: Compact, thermally efficient buck converter enabling dense PCB layouts with minimal heatsinking. Use Value: PSOP-8 package with exposed pad achieves RθJA = 22°C/W-supports 3 A continuous output at 60°C ambient without forced air. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670QMRX-ADJ/NOPB | Lower 37 V max input, same 3 A output and PSOP-8 package; 500 kHz frequency; lacks AEC-Q100 qualification. | Targeted at industrial (non-automotive) 24 V systems where extended input range beyond 37 V is not required. | Select when cost sensitivity outweighs need for 42 V rating or automotive qualification. |
| TPS54340QDDARQ1 | 42 V input, 3.5 A output, 2.2 MHz switching, SOIC-8; includes current mode control and external compensation. | Suited for space-constrained designs needing higher frequency and programmable loop response; requires external compensation network. | Select when faster transient response or design flexibility justifies added component count and layout complexity. |
Compared with LM22670QMRX-ADJ/NOPB, the LM22676QMRX-ADJ/NOPB adds 5 V headroom for 42 V operation and AEC-Q100 compliance; compared with TPS54340QDDARQ1, it trades programmability and frequency for simplicity and lower EMI due to fixed 500 kHz voltage-mode control.
Availability
LM22676QMRX-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial control, automotive body electronics, and telecom remote radio units requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for LM22676QMRX-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 designing analog and embedded processing chips for industrial, automotive, and communications markets.
The LM22676 product line delivers SIMPLE SWITCHER® buck regulators targeting high-reliability, low-component-count DC/DC conversion in harsh environments-from factory floors to vehicle cabins.
FAQ
What is the minimum output voltage achievable with LM22676QMRX-ADJ/NOPB?
The LM22676QMRX-ADJ/NOPB has a nominal feedback reference voltage of 1.285 V with ±1.5% tolerance, setting the practical minimum output voltage. When configured with a precision resistor divider, it reliably generates outputs as low as 1.285 V (e.g., 1.3 V, 1.8 V, 3.3 V). The internal reference is trimmed and tested across temperature, ensuring stability from –40°C to +125°C junction temperature.
Does LM22676QMRX-ADJ/NOPB require an external bootstrap diode?
No, the LM22676QMRX-ADJ/NOPB integrates a bootstrap diode internally. This eliminates the need for an external diode between BOOT and SW pins. Users must still place a 10 nF ceramic capacitor directly between BOOT and SW with short, low-inductance traces to ensure proper high-side gate drive and reliable startup under all load conditions.
How does the enable pin (EN) function on LM22676QMRX-ADJ/NOPB?
The EN pin on LM22676QMRX-ADJ/NOPB is a precision enable input with a typical threshold of 1.6 V 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 via a resistor for simple turn-on. The pin tolerates up to 6 V absolute maximum and supports external UVLO implementation using a resistor divider.
Is LM22676QMRX-ADJ/NOPB compatible with ceramic output capacitors?
Yes, the LM22676QMRX-ADJ/NOPB is explicitly designed for stability with low-ESR ceramic capacitors. Its internally compensated voltage-mode architecture eliminates the need for electrolytic or tantalum capacitors. TI recommends ≥22 µF X5R/X7R ceramics at the output, placed close to the IC, to ensure phase margin >45° and robust transient response across temperature and load.
What thermal performance can be expected from LM22676QMRX-ADJ/NOPB in PSOP-8 package?
In the PSOP-8 (PFM) package, LM22676QMRX-ADJ/NOPB achieves a junction-to-ambient thermal resistance (RθJA) of 22°C/W when mounted on a 2-layer PCB with 1-in² 2-oz copper pour connected to the exposed pad. This enables full 3 A continuous output at 60°C ambient without forced airflow. Thermal shutdown activates at 150°C junction temperature, with automatic recovery at ~135°C.
LM22676QMRX-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
LM22676QMRX-ADJ/NOPB FAQ
1.How can I place an order for LM22676QMRX-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22676QMRX-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 LM22676QMRX-ADJ/NOPB reliable?
The price and inventory of LM22676QMRX-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 LM22676QMRX-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22676QMRX-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22676QMRX-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22676QMRX-ADJ/NOPB?
LM22676QMRX-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22676QMRX-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 LM22676QMRX-ADJ/NOPB?
For technical support, including LM22676QMRX-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22676QMRX-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22676QMRX-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22676QMRX-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 LM22676QMRX-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22676QMRX-ADJ/NOPB?
All LM22676QMRX-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22676QMRX-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 LM22676QMRX-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22676QMRX-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22676QMRX-ADJ/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…
