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Texas Instruments LM22675QMR-ADJ/NOPB
- Part No.:
- LM22675QMR-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22675QMR-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,739
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Product details
Overview
LM22675QMR-ADJ/NOPB from Texas Instruments is an automotive-grade, 42 V input, 1 A synchronous step-down DC/DC regulator in HSOP-8 PowerPAD package. It features internal 200 mΩ N-channel MOSFET, 500 kHz fixed switching frequency, ±1.5% feedback reference accuracy (1.285 V), and integrated soft-start (500 µs). It delivers stable 1.285 V to >5 V adjustable output for industrial power rails and automotive subsystems.
For engineers reviewing the LM22675QMR-ADJ/NOPB datasheet, LM22675QMR-ADJ/NOPB pinout, LM22675QMR-ADJ/NOPB application, or LM22675QMR-ADJ/NOPB equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), internal voltage-mode compensation optimized for ≤5 V outputs, precision enable threshold (1.6 V typ), and stable operation with low-ESR ceramic capacitors.
Technical Context
The LM22675QMR-ADJ/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across wide VIN ranges (4.5 V to 42 V). Its internal Type III compensation network eliminates external compensation components for standard buck topologies delivering ≤5 V outputs.
It integrates a bootstrap diode and gate driver for the high-side N-MOSFET switch, requiring only a 10 nF ceramic capacitor between BOOT and SW pins. Minimum on-time (100 ns) and off-time (200 ns) constrain practical VIN/VOUT ratios and enforce ≥5 mA minimum load for reliable boot-cap recharge.
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 and industrial rails without pre-regulation. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Feedback Reference | 1.285 V ±1.5% - sets minimum adjustable output; enables precise resistor-divider-based VOUT programming down to this value. |
| Switching Frequency | 500 kHz (±20%) - allows compact 2.2 µH inductors and <10 µF ceramic output capacitors while maintaining good transient response. |
| RDS(ON) | 200 mΩ (typ) - limits conduction loss at 1 A to ~200 mW, enabling >90% efficiency at mid-load in typical 12 V→3.3 V designs. |
| Enable Threshold | 1.6 V (typ), 0.6 V hysteresis - permits clean power sequencing using simple resistor dividers from upstream supplies. |
| Junction Temp Range | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and engine-control module applications. |
Pinout & Package
LM22675QMR-ADJ/NOPB uses the HSOP-8 PowerPAD (DDA) package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground plane for enhanced thermal performance (RθJA = 60°C/W with 1 in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects external 10 nF ceramic capacitor to SW; provides gate drive voltage for internal high-side MOSFET. |
| EN | Enable control input | Logic-level shutdown: <1.6 V disables regulator (IQ = 25 µA); >2.2 V enables; 0.6 V hysteresis prevents chatter. |
| SW | Power switch output | Drives external catch diode and LC filter; swings from GND to VIN; requires low-inductance layout to minimize EMI. |
| FB | Feedback sensing input | High-impedance (230 nA bias) node monitoring resistor divider; placement near output capacitor critical for noise immunity. |
| GND | Power and signal ground | Primary return path for switch current and control circuitry; must be connected to exposed pad for thermal and electrical integrity. |
| VIN | Main power input | Accepts 4.5–42 V; requires local 10 µF ceramic bypass capacitor close to pin to suppress high-frequency ripple. |
| NC (Pins 2, 3) | No-connect terminals | Thermally conductive but electrically isolated; may be used as thermal relief or left unconnected per layout needs. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Boot-Strap Diode | Eliminates external bootstrap diode, reducing BOM count and layout area while ensuring reliable high-side gate drive. |
| Internal Soft-Start | Fixed 500 µs ramp time prevents inrush current and output overshoot during power-up without external timing components. |
| Stable with Ceramic Capacitors | Designed for low-ESR ceramic output caps (≥10 µF typical), avoiding bulk electrolytics and improving reliability and temperature stability. |
| Thermal Shutdown | Activates at ~150°C junction temp and releases at ~135°C, protecting device during overload or poor heatsinking conditions. |
| WEBENCH® Enabled | Direct integration with TI's WEBENCH Power Designer for automated component selection, efficiency simulation, and thermal analysis. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powering CAN transceivers, LIN drivers, and sensor interfaces in vehicle door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary 3.3 V or 5 V point-of-load regulator converting 12 V battery rail with robust start-stop and load-dump tolerance. Use Value: AEC-Q100 Grade 1 rating ensures operation across –40°C to +125°C ambient; 42 V max input withstands ISO 7637-2 pulse 5a (load dump). | Use Scenario: Generating isolated 3.3 V logic supply for digital I/O cards in programmable logic controllers handling 24 V field signals. IC Role / Device Role / Timing Role: Compact, thermally efficient buck converter replacing discrete solutions in space-constrained DIN-rail mounted enclosures. Use Value: HSOP-8 PowerPAD package enables >1 A output with minimal PCB area; internal compensation reduces design cycle time vs. externally compensated controllers. |
| Telecom Remote Radio Unit | Medical Diagnostic Sensor Hub |
Use Scenario: Providing stable 1.8 V or 2.5 V core voltage for FPGAs and ADCs in outdoor 4G/5G small-cell base stations. IC Role / Device Role / Timing Role: Secondary regulated supply derived from 48 V intermediate bus, operating continuously in high-temperature cabinets. Use Value: 500 kHz switching enables small magnetics; ±1.5% reference accuracy maintains FPGA core voltage within spec over full temp range. | Use Scenario: Powering low-noise analog front-ends and precision ADCs in portable ultrasound or ECG devices. IC Role / Device Role / Timing Role: Low-ripple, low-noise adjustable supply where FB pin routing and ceramic capacitor stability are critical for signal integrity. Use Value: High PSRR at 100 kHz and stable loop response with ceramic caps reduce conducted noise into sensitive analog signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670QMR-ADJ/NOPB | Lower 3 V min input, 300 kHz fSW, same 1 A rating and AEC-Q100 Grade 1. | Better suited for 3.3 V–5 V input systems (e.g., USB-PD powered devices); lower fSW eases EMI filtering but requires larger magnetics. | Select when input voltage may dip below 4.5 V or when lower switching noise is prioritized over size. |
| TPS54340QDDARQ1 | 42 V, 3.5 A, 500 kHz, current-mode control, adjustable soft-start, no integrated bootstrap diode. | Higher current capability and current-mode architecture improve transient response; requires external bootstrap diode and external compensation. | Select when >1 A load current or tighter line/load regulation under dynamic loads is required. |
Compared with LM22675QMR-ADJ/NOPB, LM22670QMR-ADJ/NOPB offers wider low-VIN operation at the cost of reduced switching frequency and power density, while TPS54340QDDARQ1 trades integration simplicity for higher current and design flexibility via current-mode control and external compensation.
Availability
LM22675QMR-ADJ/NOPB is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and telecom remote radio units requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for LM22675QMR-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 ICs, embedded processors, and system solutions for industrial, automotive, and communications markets.
The LM22675Q series belongs to TI's SIMPLE SWITCHER® family-engineered for ease-of-use in non-isolated DC/DC buck conversion, emphasizing minimal external components, internal compensation, and automotive qualification.
FAQ
What is the minimum output voltage achievable with LM22675QMR-ADJ/NOPB?
The LM22675QMR-ADJ/NOPB has a nominal feedback reference voltage of 1.285 V with ±1.5% accuracy over temperature. This sets the lowest practical output voltage when using the adjustable version. To achieve exactly 1.285 V, connect the FB pin directly to the output; for higher voltages, use a resistor divider per Equation 10 in the datasheet. Output voltages below 1.285 V are not supported by the internal reference.
Does LM22675QMR-ADJ/NOPB require an external bootstrap diode?
No, LM22675QMR-ADJ/NOPB integrates a bootstrap diode internally. Only a 10 nF ceramic capacitor between BOOT and SW pins is required to complete the high-side gate drive circuit. This integration reduces bill-of-materials count and improves reliability compared to controllers requiring external bootstrap diodes.
Can LM22675QMR-ADJ/NOPB operate with ceramic output capacitors only?
Yes, LM22675QMR-ADJ/NOPB is explicitly designed to be stable with low-ESR ceramic output capacitors (≥10 µF typical), eliminating the need for aluminum or tantalum electrolytics. This improves lifetime, temperature stability, and reduces board space-key advantages for automotive and industrial applications where reliability and thermal performance are critical.
What is the purpose of the NC pins (2 and 3) on LM22675QMR-ADJ/NOPB?
Pins 2 and 3 on LM22675QMR-ADJ/NOPB are no-connect (NC) terminals-electrically isolated inside the die but thermally conductive. They serve as optional thermal reliefs or mechanical anchors in the HSOP-8 PowerPAD package. They may be left floating or connected to ground pour for additional thermal dissipation, but must never be used as signal or power paths.
How does the enable function behave during input undervoltage conditions?
The LM22675QMR-ADJ/NOPB includes both internal UVLO (rising threshold ~4.3 V) and a precision enable input (EN). When VIN drops below ~3.9 V, internal UVLO forces shutdown regardless of EN state. However, for tighter control-such as preventing battery deep discharge-the EN pin can be configured with a resistor divider to assert shutdown earlier (e.g., at 6 V or 9 V), overriding the internal UVLO behavior.
LM22675QMR-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (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):
- 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
LM22675QMR-ADJ/NOPB FAQ
1.How can I place an order for LM22675QMR-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22675QMR-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 LM22675QMR-ADJ/NOPB reliable?
The price and inventory of LM22675QMR-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 LM22675QMR-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22675QMR-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22675QMR-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22675QMR-ADJ/NOPB?
LM22675QMR-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22675QMR-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 LM22675QMR-ADJ/NOPB?
For technical support, including LM22675QMR-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22675QMR-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22675QMR-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22675QMR-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 LM22675QMR-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22675QMR-ADJ/NOPB?
All LM22675QMR-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22675QMR-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 LM22675QMR-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22675QMR-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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