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Texas Instruments LM22680QMRE-ADJ/NOPB
- Part No.:
- LM22680QMRE-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22680QMRE-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:403
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Product details
Overview
LM22680QMRE-ADJ/NOPB from Texas Instruments is a 42 V, 2 A synchronous step-down DC/DC regulator in an HSOP-8 PowerPAD package, featuring voltage-mode control, internal compensation, and adjustable output down to 1.285 V. It integrates a 200-mΩ N-channel MOSFET switch, supports 4.5–42 V input, delivers >90% efficiency, and operates across –40°C to +125°C for industrial and automotive power rails.
For engineers reviewing the LM22680QMRE-ADJ/NOPB datasheet, LM22680QMRE-ADJ/NOPB pinout, LM22680QMRE-ADJ/NOPB application, or LM22680QMRE-ADJ/NOPB equivalent, key selection criteria include its 500-kHz default switching frequency, ±1.5% feedback reference accuracy, precision enable threshold (1.6 V typ), integrated bootstrap diode, and thermal shutdown with current limiting - all critical for stable 24-V/12-V conversion in space-constrained embedded systems.
Technical Context
The LM22680QMRE-ADJ/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain against VIN variation, enabling optimized transient response without external compensation. Its internal Type III compensation network ensures stability with low-ESR ceramic output capacitors and standard inductor values.
It uses a constant-frequency architecture with programmable minimum on-time (100 ns) and off-time (100 ns), supporting wide input-to-output voltage ratios. The RT/SYNC pin enables three modes: internal 500-kHz oscillator, resistor-adjusted frequency (200 kHz–1 MHz), or external synchronization - though foldback current limiting is disabled during sync mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct connection to unregulated 24-V, 12-V, or 5-V rails without pre-regulation. |
| Output Current | Up to 2 A continuous - sufficient for powering microcontrollers, FPGAs, and analog subsystems in industrial controllers. |
| Feedback Reference | 1.285 V ±1.5% - enables precise adjustable output from 1.285 V to VIN−2 V using two external resistors. |
| Switching Frequency | 500 kHz default (200 kHz–1 MHz adjustable) - balances EMI, efficiency, and component size; allows use of compact 2.2-µH inductors. |
| RDS(ON) | 0.24 Ω (typ) at TJ = 25°C - minimizes conduction loss and thermal rise under full load. |
| Quiescent Current | 3.4 mA (typ) at VFB = 5 V - enables low-noise operation in always-on subsystems without excessive standby drain. |
| Enable Threshold | 1.6 V (typ) with 0.6 V hysteresis - supports clean power sequencing via resistor dividers from upstream rails. |
Pinout & Package
LM22680QMRE-ADJ/NOPB is housed in an HSOP-8 package with exposed PowerPAD (DDA), measuring 4.89 mm × 3.90 mm. The exposed pad must be soldered to a PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply input | Provides gate drive voltage for internal high-side MOSFET; requires 10-nF ceramic capacitor between BOOT and SW. |
| EN | Enable control input | Logic-level enable with 1.6 V threshold and 0.6 V hysteresis; pulls up internally at ~6 µA; supports UVLO implementation. |
| SW | Power switch node | Drives external inductor; swings from GND to VIN; requires low-inductance layout to minimize ringing and EMI. |
| RT/SYNC | Oscillator mode control | Selects internal 500-kHz clock, resistor-adjusted frequency, or external synchronization; latched at startup. |
| FB | Feedback input | Compares output voltage (via resistor divider) to 1.285-V internal reference; bias current <230 nA enables high-resistor-divider designs. |
| GND | System ground | Power and signal return; connects to exposed PowerPAD for thermal dissipation and noise reduction. |
| VIN | Main input supply | Accepts 4.5–42 V; supplies internal LDO, gate driver, and control circuitry; requires local 10-µF ceramic bypass. |
| SS | Soft-start timing | Sinks 50 µA to charge external capacitor; sets ramp time (TSS ≈ 26 ms/µF); resets on shutdown or thermal fault. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates need for external compensation components, reducing BOM count and layout sensitivity while maintaining stability with ceramic output caps. |
| Integrated bootstrap diode | Removes requirement for external bootstrap diode, simplifying layout and improving reliability in high-duty-cycle applications. |
| Adjustable soft-start via SS pin | Enables controlled output ramp-up using a single external capacitor (100 nF–1 µF), preventing inrush current and system brownouts. |
| Precision enable with UVLO support | Allows robust power sequencing and custom undervoltage lockout using resistor dividers - critical for battery-powered or multi-rail systems. |
| Thermal shutdown + current limiting | Protects against sustained overloads and PCB overheating; current limit folds back to ~100 kHz under short-circuit conditions (disabled during sync mode). |
Applications
| Industrial Control | Telecom/Datacom Systems |
|---|---|
Use Scenario: Powering PLC I/O modules and sensor interfaces from 24-V factory bus rails. IC Role / Device Role / Timing Role: Primary buck converter delivering regulated 3.3 V or 5 V to microcontrollers and ADCs. Use Value: Wide 4.5–42 V input range tolerates bus transients; ±1.5% reference ensures accurate ADC reference voltage generation. | Use Scenario: Generating intermediate 12-V or 5-V rails in telecom line cards powered from -48-V or 24-V backplanes. IC Role / Device Role / Timing Role: Secondary point-of-load regulator converting intermediate rail to FPGA core or SerDes supply. Use Value: 500-kHz switching enables small magnetics; integrated boot diode reduces board area and improves thermal performance. |
| Embedded Systems | Automotive Body Electronics |
Use Scenario: Powering ARM-based edge nodes in smart building gateways with limited PCB space. IC Role / Device Role / Timing Role: Main system regulator supplying processor, memory, and wireless SoC from 12-V vehicle or PoE-derived input. Use Value: HSOP-8 PowerPAD package provides low thermal resistance (60°C/W); –40°C to +125°C rating supports extended temperature operation. | Use Scenario: Supplying infotainment display controllers and lighting ECUs from 12-V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Input-stage buck regulator handling 4.5–42 V transients including load dump (up to 42 V). Use Value: Absolute max VIN = 43 V and built-in thermal/current protection ensure robustness during automotive stress tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670MR-ADJ/NOPB | Lower 36-V max input, same 2-A rating and HSOP-8 package; no RT/SYNC pin - fixed 500-kHz frequency only. | Lacks frequency adjustment/synchronization; suitable where EMI constraints allow fixed frequency and no multi-regulator coordination needed. | Choose when input never exceeds 36 V and design simplicity outweighs flexibility. |
| TPS54240DGQR | 40-V max input, 2.5-A rating, SOIC-8; includes current-mode control and cycle-by-cycle current limit; no integrated boot diode. | Requires external bootstrap diode; offers tighter current limit accuracy but higher external component count. | Prefer when higher output current headroom or current-mode loop advantages (e.g., faster load transient response) are required. |
Compared with LM22670MR-ADJ/NOPB, the LM22680QMRE-ADJ/NOPB adds 6-V input headroom and frequency flexibility; versus TPS54240DGQR, it trades external diode complexity for integrated simplicity and better thermal performance in HSOP-8 PowerPAD - making it optimal for space-constrained 42-V industrial and automotive buck designs.
Availability
LM22680QMRE-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom/datacom systems, and embedded systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability.
Supply support for LM22680QMRE-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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM22680QMRE-ADJ/NOPB belongs to TI's SIMPLE SWITCHER® family - engineered for ease-of-use in industrial and automotive DC/DC designs, emphasizing minimal external components, WEBENCH® integration, and rugged operation across harsh environments.
FAQ
What is the maximum input voltage rating for LM22680QMRE-ADJ/NOPB?
The LM22680QMRE-ADJ/NOPB has an absolute maximum input voltage of 43 V, with recommended operation from 4.5 V to 42 V. This 42-V rating enables direct interface with 24-V industrial buses and automotive systems experiencing load dump transients, ensuring reliable operation without external clamping circuitry in most cases.
Does LM22680QMRE-ADJ/NOPB require an external bootstrap diode?
No, the LM22680QMRE-ADJ/NOPB integrates a bootstrap diode, eliminating the need for an external component. This simplifies layout, reduces bill-of-materials cost, and improves reliability - especially in high-duty-cycle applications where external diode failure modes could compromise regulation.
How is the output voltage set on LM22680QMRE-ADJ/NOPB?
The LM22680QMRE-ADJ/NOPB uses a resistor divider from VOUT to FB to set output voltage, referenced to its internal 1.285-V ±1.5% precision bandgap. For example, a 100-kΩ top resistor and 43.2-kΩ bottom resistor yields 3.3 V. The FB pin draws only 230 nA, allowing high-value resistors to minimize divider current loss.
What thermal performance can be expected from LM22680QMRE-ADJ/NOPB in HSOP-8 PowerPAD package?
With proper PCB copper area (1 in²), the LM22680QMRE-ADJ/NOPB achieves a junction-to-ambient thermal resistance (RθJA) of 60°C/W. Its exposed PowerPAD must be soldered to a solid GND plane; thermal performance degrades to 115°C/W with minimal copper, so layout adherence to TI's guidelines is essential for 2-A continuous operation at high ambient temperatures.
Can LM22680QMRE-ADJ/NOPB synchronize to an external clock?
Yes, the LM22680QMRE-ADJ/NOPB supports external synchronization via the RT/SYNC pin, accepting clocks from 500 kHz up to 1 MHz. During startup, if the pin voltage is forced above ~0.8 V, it enters sync mode and locks to the rising edge of the external signal - useful for noise-sensitive systems or coordinated multi-regulator timing, though current foldback is disabled in this mode.
LM22680QMRE-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:
- 2A
- 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
LM22680QMRE-ADJ/NOPB FAQ
1.How can I place an order for LM22680QMRE-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22680QMRE-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 LM22680QMRE-ADJ/NOPB reliable?
The price and inventory of LM22680QMRE-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 LM22680QMRE-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22680QMRE-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22680QMRE-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22680QMRE-ADJ/NOPB?
LM22680QMRE-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22680QMRE-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 LM22680QMRE-ADJ/NOPB?
For technical support, including LM22680QMRE-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22680QMRE-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22680QMRE-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22680QMRE-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 LM22680QMRE-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22680QMRE-ADJ/NOPB?
All LM22680QMRE-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22680QMRE-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 LM22680QMRE-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22680QMRE-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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