My Inquiry
My Account
Texas Instruments LM22675QMRX-ADJ/NOPB
- Part No.:
- LM22675QMRX-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22675QMRX-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:4,976
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM22675QMRX-ADJ/NOPB from Texas Instruments is an automotive-grade 42 V, 1 A step-down DC/DC regulator in HSOP-8 PowerPAD package, featuring voltage-mode PWM control, integrated 200 mΩ N-channel MOSFET, 500 kHz fixed switching frequency, ±1.5% feedback reference accuracy, and precision enable with 1.6 V threshold. It delivers stable 1.285 V to 42 V adjustable output for power rails in harsh-environment vehicle subsystems.
For engineers reviewing the LM22675QMRX-ADJ/NOPB datasheet, LM22675QMRX-ADJ/NOPB pinout, LM22675QMRX-ADJ/NOPB application, or LM22675QMRX-ADJ/NOPB equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), internal loop compensation optimized for ≤5 V outputs, bootstrap capacitor requirement on BOOT-SW, thermal shutdown at 150°C, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22675QMRX-ADJ/NOPB implements a voltage-mode PWM architecture with input voltage feedforward to stabilize loop gain across input variations, enabling optimized transient response. Its internal Type III compensation network eliminates external compensation components for standard buck topologies with ceramic output capacitors.
It integrates a floating high-side gate driver powered by the BOOT-to-SW bootstrap capacitor, requiring ≥5 mA minimum load for full recharge within the 100 ns minimum off-time. The device enforces current limiting (1.3–1.7 A typ) and enters low-frequency foldback mode under severe overload to prevent inductor current runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to 12 V/24 V automotive batteries with transient tolerance up to 43 V absolute max. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in ADAS and body electronics. |
| Feedback Reference | 1.285 V ±1.5% - sets minimum adjustable output; enables precise resistor-divider programming of any higher voltage. |
| Switching Frequency | 500 kHz ±100 kHz - allows compact 2.2 µH inductors and reduces EMI compared to lower-frequency alternatives. |
| RDS(ON) | 0.20 Ω typ - minimizes conduction loss at full load, supporting >90% peak efficiency in typical 12 V → 3.3 V designs. |
| Enable Threshold | 1.6 V (falling), 2.2 V (rising) with 0.6 V hysteresis - enables reliable power sequencing using simple resistor dividers from upstream rails. |
| Junction Temp Range | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and infotainment applications. |
Pinout & Package
LM22675QMRX-ADJ/NOPB uses the HSOP-8 PowerPAD (DDA) package with 4.89 mm × 3.90 mm body size and exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJA = 60°C/W with 1 in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply input | Connects to SW via 10 nF ceramic capacitor; supplies gate drive voltage for internal high-side MOSFET. |
| EN | Enable control input | Logic-level input with 1.6 V turn-off threshold; draws only 6 µA when pulled low; internal 6 µA pullup. |
| SW | Power switch node | Drives external inductor; swings from ~0 V to VIN; requires Schottky catch diode or synchronous rectifier. |
| FB | Feedback sensing input | High-impedance (230 nA bias) node for resistor divider; regulates output by comparing to 1.285 V reference. |
| GND | Power and signal ground | Common return for all internal circuits; exposed pad must be connected to PCB ground for thermal and electrical integrity. |
| VIN | Main power input | Accepts 4.5–42 V; bypassed with ≥10 µF ceramic capacitor near pin to suppress high-frequency noise. |
| NC | No-connect terminals | Pins 2 and 3 are unconnected die pads; serve only as thermal conduction paths to PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boot-strap diode | Eliminates need for external bootstrap diode, reducing BOM count and layout complexity in non-synchronous buck designs. |
| Internal soft-start | 500 µs fixed ramp time prevents inrush current and output overshoot during power-up or recovery from fault. |
| Stable with ceramic capacitors | Supports low-ESR ceramic output caps (no electrolytic required), improving reliability and reducing footprint in space-constrained modules. |
| Thermal shutdown | Activates at 150°C junction temperature and releases at ~135°C, protecting against sustained overload or poor heatsinking. |
| WEBENCH® enabled | Full design support in TI's online tool including component selection, efficiency simulation, thermal modeling, and PCB layout guidance. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
Use Scenario: Powering CAN transceivers, LIN drivers, and sensor interfaces in door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary 5 V or 3.3 V buck converter supplying logic rails and communication PHYs. Use Value: AEC-Q100 Grade 1 rating ensures operation across –40°C to +125°C ambient; 42 V input withstands load-dump transients without external protection. | Use Scenario: Generating isolated 3.3 V or 5 V for microcontroller and analog front-end in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Non-isolated point-of-load regulator converting 24 V industrial bus to digital logic voltage. Use Value: Internal compensation and 500 kHz switching enable small 2.2 µH inductors and <1000 µF ceramic output capacitance, reducing board area and improving MTBF. |
| Telematics Head Unit Core Rail | Automotive Camera Module Power |
Use Scenario: Providing clean, regulated 1.2 V or 1.8 V core voltage for application processors and memory in infotainment systems. IC Role / Device Role / Timing Role: Adjustable-output buck regulator feeding processor core domain with tight voltage tolerance. Use Value: ±1.5% reference accuracy and low 230 nA FB bias current minimize output error from divider resistor drift and leakage, ensuring stable CPU operation. | Use Scenario: Delivering 2.8 V or 3.3 V to image sensors and ISP ASICs in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: Compact, thermally robust buck converter mounted directly on camera PCB near sensor. Use Value: HSOP-8 PowerPAD package with exposed thermal pad enables direct mounting to metal heat-spreader, maintaining <125°C junction temp even at full 1 A load in sealed enclosures. |
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 | 3 V to 42 V input range; 300 kHz switching frequency; higher RDS(ON) (0.32 Ω); no integrated bootstrap diode. | Better suited for ultra-low-IQ standby modes but requires external bootstrap diode and larger magnetics. | Select when lower quiescent current (25 µA) is critical and 300 kHz operation is acceptable for EMI filtering. |
| TPS54340QDDARQ1 | 4.5 V to 42 V input; 1 A; 500 kHz; integrated high-side FET; no internal compensation - requires external RC network. | Offers adjustable soft-start and current limit, but demands full loop compensation design effort. | Choose when custom loop response tuning is needed and design resources exist for stability analysis. |
Compared with LM22675QMRX-ADJ/NOPB, LM22670QMRX-ADJ/NOPB trades switching frequency and integration for lower IQ, while TPS54340QDDARQ1 sacrifices internal compensation for greater control flexibility-neither offers drop-in replacement due to differing pinouts, compensation schemes, or thermal pad configurations.
Availability
LM22675QMRX-ADJ/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and telematics head unit core rails requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for LM22675QMRX-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 delivering analog, embedded processing, and connectivity solutions for automotive, industrial, and personal electronics markets.
The LM22675Q series belongs to TI's SIMPLE SWITCHER® family-designed specifically for robust, easy-to-use DC/DC conversion in harsh environments where reliability, wide input range, and minimal external components are essential.
FAQ
What is the minimum output voltage achievable with LM22675QMRX-ADJ/NOPB?
The LM22675QMRX-ADJ/NOPB has a nominal feedback reference voltage of 1.285 V, which sets the lowest possible output voltage when the FB pin is connected directly to VOUT. This value is specified with ±1.5% accuracy over temperature, making 1.285 V the practical minimum for stable regulation. Output voltages below this require external circuitry and are not supported by the internal reference.
Does LM22675QMRX-ADJ/NOPB require an external bootstrap diode?
No, LM22675QMRX-ADJ/NOPB integrates a bootstrap diode internally, eliminating the need for an external component between BOOT and VIN. A 10 nF ceramic capacitor must still be placed between BOOT and SW pins to provide gate drive energy for the high-side MOSFET, and this capacitor must be recharged each cycle via the minimum off-time constraint.
What is the purpose of the NC pins on LM22675QMRX-ADJ/NOPB?
Pins 2 and 3 on LM22675QMRX-ADJ/NOPB are designated NC (No Connect) - they have no internal electrical connection but serve as thermal conduction paths from the die to the PCB. These pins should be left unconnected electrically but may be soldered to copper pour to improve thermal performance, consistent with standard HSOP-8 PowerPAD layout practices.
Can LM22675QMRX-ADJ/NOPB operate with ceramic output capacitors only?
Yes, LM22675QMRX-ADJ/NOPB is explicitly designed to be stable with low-ESR ceramic output capacitors - a key feature highlighted in its datasheet. Unlike many older regulators requiring tantalum or aluminum electrolytics for phase margin, its internal Type III compensation ensures stability with typical 10–100 µF X7R/X5R ceramics, improving reliability and reducing board area.
How does the enable function behave during input undervoltage conditions?
The LM22675QMRX-ADJ/NOPB features dual enable mechanisms: a precision EN pin (1.6 V turn-off threshold) and internal UVLO (4.3 V rising, 3.9 V falling). When VIN drops below UVLO thresholds, the device shuts down regardless of EN state. For tighter control, EN can be driven via a resistor divider from VIN to implement custom UVLO thresholds - e.g., disabling at 9 V to prevent brownout operation in battery-powered systems.
LM22675QMRX-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:
- 1A
- 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
LM22675QMRX-ADJ/NOPB FAQ
1.How can I place an order for LM22675QMRX-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22675QMRX-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 LM22675QMRX-ADJ/NOPB reliable?
The price and inventory of LM22675QMRX-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 LM22675QMRX-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22675QMRX-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22675QMRX-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22675QMRX-ADJ/NOPB?
LM22675QMRX-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22675QMRX-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 LM22675QMRX-ADJ/NOPB?
For technical support, including LM22675QMRX-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22675QMRX-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22675QMRX-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22675QMRX-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 LM22675QMRX-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22675QMRX-ADJ/NOPB?
All LM22675QMRX-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22675QMRX-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 LM22675QMRX-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22675QMRX-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22675QMRX-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…
