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Texas Instruments LM22670QMRE-ADJ/NOPB
- Part No.:
- LM22670QMRE-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22670QMRE-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:639
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Product details
Overview
LM22670QMRE-ADJ/NOPB from Texas Instruments is a 42-V, 3-A synchronous step-down DC/DC regulator in HSOP-8 PowerPAD™ package, featuring adjustable output (as low as 1.285 V), 500-kHz default switching frequency, ±1.5% feedback reference accuracy, and integrated bootstrap diode. It delivers high efficiency (>90%) in industrial power rails converting 24-V/12-V inputs to sub-5-V logic supplies.
For engineers reviewing the LM22670QMRE-ADJ/NOPB datasheet, LM22670QMRE-ADJ/NOPB pinout, LM22670QMRE-ADJ/NOPB application, or LM22670QMRE-ADJ/NOPB equivalent, key selection factors include its 4.5–42-V input range, internal voltage-mode compensation, thermal shutdown protection, and compatibility with low-ESR ceramic output capacitors - critical for compact, robust buck converter designs.
Technical Context
The LM22670QMRE-ADJ/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across wide VIN variations. Its internal Type III compensation network is optimized for outputs ≤5 V, enabling stable operation without external compensation components when paired with standard inductor-capacitor combinations.
It integrates a 120-mΩ N-channel MOSFET switch, precision enable input (1.6 V threshold, 0.6 V hysteresis), and soft-start (500 µs typical). The RT/SYNC pin supports three modes: internal 500-kHz oscillator, resistor-adjustable 200 kHz–1 MHz, or external synchronization - but frequency adjustment and sync cannot operate simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct regulation from unregulated 24-V industrial or automotive rails without pre-regulation. |
| Output Current | Up to 3 A continuous - sufficient for powering FPGA I/O banks, microcontroller cores, or multiple digital ICs from a single channel. |
| Feedback Reference | 1.285 V (typ), ±1.5% - enables precise adjustable output down to 1.285 V; sets minimum VOUT without external divider. |
| Switching Frequency | 500 kHz (default), adjustable 200 kHz–1 MHz - balances EMI control, component size, and efficiency; higher frequencies reduce inductor/capacitor footprint. |
| RDS(ON) | 120 mΩ (PFM package) - limits conduction loss at 3 A, contributing to >90% peak efficiency at mid-load conditions. |
| Quiescent Current | 3.4 mA (active), 25 µA (shutdown) - enables low-power standby modes in battery-backed or energy-conscious systems. |
| Junction Temp Range | –40°C to +125°C - qualified for extended industrial and automotive under-hood environments without derating. |
Pinout & Package
LM22670QMRE-ADJ/NOPB uses the HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground for enhanced thermal dissipation (RθJA = 60°C/W with 1-in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SW | Switch node | Drives external inductor; swings between GND and VIN; requires low-inductance layout to minimize ringing and EMI. |
| 2 - VIN | Main input supply | Accepts 4.5–42 V; must be decoupled near pin with low-ESR ceramic capacitor to suppress high-frequency ripple. |
| 3 - BOOT | Bootstrap supply | Connects to SW via 10-nF ceramic capacitor; powers high-side gate driver; requires short, wide traces for reliable bootstrapping. |
| 4 - GND | Power and signal ground | Common return for input/output paths; connects to exposed pad for thermal and electrical integrity. |
| 5 - RT/SYNC | Oscillator control | Selects operating mode: floating = 500 kHz; resistor-to-GND = adjustable frequency; external clock = sync - latched at startup. |
| 6 - FB | Feedback input | Senses output via resistive divider; internal 1.285-V reference sets VOUT = 1.285 × (1 + R1/R2); bias current 230 nA minimizes divider error. |
| 7 - EN | Enable control | Logic-level ON/OFF: <1.6 V disables regulator (25 µA IQ); >2.2 V enables; 0.6 V hysteresis prevents chatter during sequencing. |
| 8 - EP | Exposed thermal pad | Must be soldered to solid GND plane; primary thermal path - accounts for >70% of total heat removal in HSOP-8 package. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates need for external compensation network - reduces BOM count and design iteration time for 1.285–5-V outputs. |
| Integrated bootstrap diode | Removes external bootstrap diode requirement - simplifies layout, improves reliability, and reduces board area in high-side gate drive path. |
| Stable with low-ESR ceramic capacitors | Enables use of compact, high-reliability X7R/X5R MLCCs instead of bulkier electrolytics - critical for space-constrained embedded systems. |
| Adjustable switching frequency & synchronization | Permits EMI band avoidance and multi-rail phase alignment - essential for noise-sensitive data acquisition or telecom power systems. |
| Thermal shutdown & current limiting | Protects against sustained overloads and PCB overheating - triggers at 150°C junction temp and folds back frequency under short-circuit. |
Applications
| Industrial Control PLC Power | Telecom Line Card Bias |
|---|---|
|
Use Scenario: Powering FPGA I/O banks and ARM Cortex-M7 cores in programmable logic controllers with 24-V field bus input. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3.3 V/2.5 V/1.8 V from 24-V rail; provides regulated, low-noise supply with fast transient response. Use Value: 3-A capability and 500-kHz switching enable compact 12-mm² solution; thermal pad ensures operation at 75°C ambient without fan cooling. |
Use Scenario: Generating isolated 5-V bias for Ethernet PHYs and SerDes interfaces on telecom line cards fed from –48-V DC plant. IC Role / Device Role / Timing Role: Non-isolated buck stage stepping –48-V (via intermediate 12-V rail) to 5 V; operates in fixed-frequency mode for predictable EMI profile. Use Value: Wide 4.5–42-V input range accommodates 12-V intermediate rail variation; ±1.5% VREF ensures accurate PHY voltage compliance. |
| Automotive Body Control Module | Embedded System Point-of-Load |
|
Use Scenario: Supplying 1.2 V core voltage to automotive MCU in body control unit with cold-crank (6-V) and load-dump (42-V) transients. IC Role / Device Role / Timing Role: Input-tolerant buck converter with UVLO and thermal protection; maintains regulation during 6–42-V input excursions. Use Value: 42-V absolute max rating and –40°C to +125°C junction range meet AEC-Q100 Grade 1 requirements; soft-start prevents inrush into large output caps. |
Use Scenario: Local regulation for DDR memory termination (VTT) and auxiliary 3.3-V rails in medical imaging subsystems. IC Role / Device Role / Timing Role: Secondary buck converter downstream of main PMIC; configured for adjustable output to match varying VTT specs. Use Value: Adjustable FB pin allows precise 0.6–1.2 V VTT setting; low 25-µA shutdown current extends battery life in portable diagnostic devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671MR-ADJ/NOPB | Same architecture but SO PowerPAD-8 package (10.16 mm × 9.85 mm); 100-mΩ RDS(ON); higher thermal mass. | Better thermal performance at high ambient (RθJA = 22°C/W with 1-in² copper); suited for 3-A continuous loads above 85°C ambient. | Choose LM22671MR-ADJ/NOPB when board space permits larger TO-263 footprint and thermal margin is critical over compactness. |
| TPS54340DDAR | 42-V, 3.5-A buck with current-mode control; 100-µA quiescent current; no integrated bootstrap diode. | Superior light-load efficiency and faster transient response due to current-mode architecture; requires external bootstrap diode. | Choose TPS54340DDAR when ultra-low IQ and dynamic performance outweigh layout complexity and BOM cost. |
Compared with LM22670QMRE-ADJ/NOPB, LM22671MR-ADJ/NOPB trades smaller footprint for better thermal handling, while TPS54340DDAR offers lower standby current and current-mode advantages at the cost of added external components and different compensation behavior.
Availability
LM22670QMRE-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power, and automotive body electronics requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LM22670QMRE-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 expertise in high-reliability power conversion ICs.
The LM22670 product line delivers SIMPLE SWITCHER® step-down regulators targeting industrial, automotive, and telecom applications where ease of design, thermal robustness, and wide-input operation are essential.
FAQ
What is the minimum output voltage achievable with LM22670QMRE-ADJ/NOPB?
The LM22670QMRE-ADJ/NOPB has an internal feedback reference voltage of 1.285 V (typical), which sets the lowest possible output voltage when the FB pin is connected directly to VOUT. With proper resistor divider selection, the device can regulate stably down to exactly 1.285 V - confirmed in the Electrical Characteristics table across –40°C to +125°C. Output voltages below this value are not supported by the internal reference architecture of LM22670QMRE-ADJ/NOPB.
Does LM22670QMRE-ADJ/NOPB require an external bootstrap diode?
No, LM22670QMRE-ADJ/NOPB integrates a bootstrap diode internally, eliminating the need for an external component between BOOT and SW pins. This is explicitly stated in the Features section of the datasheet and verified in the Functional Block Diagram. Users must still place a 10-nF ceramic capacitor between BOOT and SW with low-inductance routing - but no discrete diode is required, reducing bill-of-materials count and improving reliability in the high-side gate drive path of LM22670QMRE-ADJ/NOPB.
Can LM22670QMRE-ADJ/NOPB synchronize to an external clock while also adjusting frequency with an RT resistor?
No, LM22670QMRE-ADJ/NOPB does not support simultaneous frequency adjustment and external synchronization. As documented in Section 7.3.3, the RT/SYNC pin operates in one of three mutually exclusive modes: floating (500 kHz internal oscillator), resistor-connected (200 kHz–1 MHz adjustable), or externally driven clock (synchronization). The mode is latched at startup based on RT/SYNC voltage level, and attempting both functions concurrently will result in undefined behavior - the device will default to the mode determined during initial power-up of LM22670QMRE-ADJ/NOPB.
What thermal performance can be expected from LM22670QMRE-ADJ/NOPB in HSOP-8 package?
LM22670QMRE-ADJ/NOPB in HSOP-8 PowerPAD™ package has a junction-to-ambient thermal resistance (RθJA) of 60°C/W when mounted on 1 in² of 2-oz copper. Actual thermal performance depends on PCB layout: increasing copper area or adding thermal vias under the exposed pad lowers RθJA toward 42°C/W. The datasheet specifies a maximum junction temperature of 150°C, and thermal shutdown activates at that threshold - ensuring safe operation even under sustained 3-A load at elevated ambient temperatures for LM22670QMRE-ADJ/NOPB.
Is LM22670QMRE-ADJ/NOPB qualified for automotive applications?
LM22670QMRE-ADJ/NOPB is not the automotive-grade variant; it belongs to the commercial LM22670 family. The automotive-qualified version is LM22670-Q1 (AEC-Q100 Grade 1, –40°C to +125°C). While LM22670QMRE-ADJ/NOPB shares identical electrical specifications and operates across –40°C to +125°C, it lacks the automotive-specific qualification testing, traceability, and change control required for automotive production. For automotive body control or infotainment systems, LM22670-Q1 - not LM22670QMRE-ADJ/NOPB - is the compliant choice.
LM22670QMRE-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
LM22670QMRE-ADJ/NOPB FAQ
1.How can I place an order for LM22670QMRE-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670QMRE-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 LM22670QMRE-ADJ/NOPB reliable?
The price and inventory of LM22670QMRE-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 LM22670QMRE-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670QMRE-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670QMRE-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670QMRE-ADJ/NOPB?
LM22670QMRE-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670QMRE-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 LM22670QMRE-ADJ/NOPB?
For technical support, including LM22670QMRE-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670QMRE-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22670QMRE-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670QMRE-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 LM22670QMRE-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670QMRE-ADJ/NOPB?
All LM22670QMRE-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670QMRE-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 LM22670QMRE-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22670QMRE-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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