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Texas Instruments LM22670MRX-ADJ/J7002408
- Part No.:
- LM22670MRX-ADJ/J7002408
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22670MRX-ADJ/J7002408.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:4,812
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Product details
Overview
LM22670MRX-ADJ/J7002408 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, and integrated bootstrap diode. It delivers >90% efficiency in industrial power rails converting 24-V or 12-V inputs to sub-5-V logic supplies.
For engineers reviewing the LM22670MRX-ADJ/J7002408 datasheet, LM22670MRX-ADJ/J7002408 pinout, LM22670MRX-ADJ/J7002408 application, or LM22670MRX-ADJ/J7002408 equivalent, key selection criteria include its 4.5–42-V input range, ±1.5% feedback reference accuracy, thermal shutdown at 150°C, and compatibility with low-ESR ceramic output capacitors without external compensation.
Technical Context
The LM22670MRX-ADJ/J7002408 implements voltage-mode PWM control with input voltage feedforward for stable loop gain across wide VIN ranges. Its internal Type III compensation is optimized for outputs ≤5 V, eliminating need for external compensation networks when used 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 RT/SYNC pin supporting three modes: internal 500-kHz oscillator, resistor-adjustable 200 kHz–1 MHz, or external clock synchronization - though 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 connection to 24-V industrial buses and automotive battery rails without pre-regulation. |
| Output Current | Up to 3 A continuous - sufficient for powering FPGA I/O banks, microcontroller cores, or multiple ASICs from single rail. |
| 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 mitigation, inductor size, and transient response in compact layouts. |
| RDS(ON) | 120 mΩ (PFM package) - reduces conduction loss at full load; contributes to >90% peak efficiency at 12-VIN/3.3-VOUT. |
| Quiescent Current | 3.4 mA (active), 25 µA (shutdown) - enables low-power standby in always-on systems without auxiliary LDOs. |
| Junction Temp Range | –40°C to +125°C - qualified for extended industrial and automotive under-hood environments. |
Pinout & Package
LM22670MRX-ADJ/J7002408 is housed in an HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with 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 |
|---|---|---|
| 1 SW | Switch Node | Drives external inductor; swings between GND and VIN; requires low-inductance layout to minimize ringing. |
| 2 VIN | Main Input Supply | Accepts 4.5–42 V; connects to bulk input capacitor; must be decoupled near pin with low-ESR ceramic. |
| 3 BOOT | Bootstrap Supply | Connects to SW via 10-nF ceramic capacitor; powers high-side gate driver; requires short, wide traces. |
| 4 GND | Power Ground | System return path; ties to exposed pad; must be low-impedance connection to minimize noise coupling. |
| 5 RT/SYNC | Oscillator Control | Selects mode: floating = 500 kHz, resistor-to-GND = adjustable freq, external clock = sync; threshold ~0.8 V at startup. |
| 6 FB | Feedback Input | Senses output via resistor divider; internal 1.285-V reference sets VOUT = 1.285 × (1 + R1/R2); bias current 230 nA. |
| 7 EN | Enable Input | Logic-level ON/OFF control; 1.6 V threshold with 0.6 V hysteresis; internal 6-µA pullup allows direct VIN tie via 470-kΩ resistor. |
| 8 NC | No Connect | Not internally bonded; must remain unconnected per datasheet; no routing or thermal relief required. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates external compensation components; simplifies design for 1.285–5-V outputs while maintaining stability with ceramic capacitors. |
| Integrated bootstrap diode | Removes need for external Schottky diode in boot circuit; reduces BOM count and layout area in space-constrained applications. |
| Adjustable switching frequency & sync capability | Enables EMI band avoidance and multi-rail phase alignment; supports system-level clock coordination without additional timing ICs. |
| Precision enable with UVLO | Allows clean power sequencing across multiple rails; dual-threshold EN pin supports both controlled startup and input undervoltage protection. |
| Thermal shutdown & current limiting | Protects against sustained overloads and PCB overheating; folds back frequency during short-circuit to limit power dissipation and inductor stress. |
Applications
| Industrial PLC Power | Telecom Line Card |
|---|---|
|
Use Scenario: Providing isolated 3.3-V and 1.8-V rails for programmable logic controllers operating on 24-V factory bus. IC Role / Device Role / Timing Role: Primary buck converter delivering regulated core and I/O voltages; handles line transients up to 42 V. Use Value: Wide input range eliminates need for upstream pre-regulator; 3-A capability powers multiple digital subsystems from single IC. |
Use Scenario: Generating 5-V auxiliary supply for Ethernet PHYs and management controllers on telecom line cards. IC Role / Device Role / Timing Role: Secondary DC/DC stage converting 12-V backplane to stable 5-V; synchronized to system clock to reduce spectral noise. Use Value: RT/SYNC pin enables deterministic EMI placement; ±1.5% reference ensures compliance with IEEE 802.3 voltage tolerance. |
| Automotive Body Control Module | Embedded Edge Gateway |
|
Use Scenario: Powering MCU, CAN transceiver, and sensor interface in body control unit exposed to cold-crank (4.5 V) and load-dump (42 V) conditions. IC Role / Device Role / Timing Role: Main system regulator with automotive-grade thermal and electrical robustness; operates continuously across –40°C to +125°C. Use Value: AEC-Q100 Grade 1 qualification confirmed via LM22670-Q1 lineage; integrated soft-start prevents inrush current during ignition cycles. |
Use Scenario: Converting 12-V PoE++ or battery input to 3.3-V logic rail for ARM-based edge gateway running real-time Linux. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator; supports dynamic voltage scaling via FB divider programming. Use Value: 120-mΩ RDS(ON) and ceramic-capacitor compatibility enable >90% efficiency at 2-A load; small HSOP-8 footprint saves board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671MRX-ADJ/NOPB | Same architecture but SO PowerPAD-8 package (10.16 mm × 9.85 mm); lower RDS(ON) (100 mΩ); higher thermal mass. | Better suited for higher ambient temperatures or sustained 3-A loads due to improved thermal resistance (RθJA = 22°C/W). | Select when thermal performance outweighs board area constraints; not pin-compatible due to different package outline and pin 2/7 swap. |
| TPS54340DDAR | 42-V, 3.5-A buck with current-mode control; adjustable freq 100 kHz–2.5 MHz; no integrated boot diode. | Offers faster transient response and wider frequency tuning, but requires external bootstrap diode and external compensation. | Choose for designs needing tighter load regulation or higher-frequency operation; adds two passive components vs. LM22670MRX-ADJ/J7002408's integrated solution. |
Compared with LM22670MRX-ADJ/J7002408, LM22671MRX-ADJ/NOPB trades smaller footprint for better thermal handling, while TPS54340DDAR sacrifices integration for greater control flexibility and bandwidth - making LM22670MRX-ADJ/J7002408 optimal for cost-sensitive, space-constrained industrial applications requiring minimal external parts.
Availability
LM22670MRX-ADJ/J7002408 is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and embedded edge computing applications requiring stable component supply, long-term lifecycle support, and automotive-qualified reliability.
Supply support for LM22670MRX-ADJ/J7002408 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 and embedded processing technologies, with decades of expertise in power management ICs and high-reliability industrial solutions.
The LM22670 series belongs to TI's SIMPLE SWITCHER® family - designed specifically for ease-of-use in non-isolated DC/DC buck applications where minimal external components, fast time-to-market, and WEBENCH®-enabled design validation are critical.
FAQ
What is the minimum output voltage achievable with LM22670MRX-ADJ/J7002408?
The LM22670MRX-ADJ/J7002408 has a fixed internal feedback reference voltage of 1.285 V (typical), which defines the lowest possible output voltage when using the ADJ configuration. With no external resistor divider, VOUT equals this reference. When using a divider, VOUT = 1.285 V × (1 + R1/R2), so the absolute minimum remains 1.285 V. This value is guaranteed over temperature (±1.5% accuracy) and forms the basis for all adjustable output designs using LM22670MRX-ADJ/J7002408.
Does LM22670MRX-ADJ/J7002408 require external compensation components?
No, LM22670MRX-ADJ/J7002408 features fully integrated Type III voltage-mode loop compensation optimized for outputs up to 5 V. This eliminates the need for external resistors or capacitors in the compensation network, significantly reducing design complexity and BOM count. Stability is maintained across standard inductor and ceramic capacitor combinations, and TI's WEBENCH® Designer tool validates loop response without manual calculations - a key advantage of the LM22670MRX-ADJ/J7002408 over many competing controllers.
Can LM22670MRX-ADJ/J7002408 synchronize to an external clock?
Yes, LM22670MRX-ADJ/J7002408 supports external clock synchronization via the RT/SYNC pin. When an external clock signal (1.75 V threshold, 50% duty cycle, <1 MHz) is applied during startup, the device latches into sync mode and locks its switching frequency to the external source. This feature enables EMI reduction through frequency alignment and multi-rail phase interleaving. However, sync mode and resistor-based frequency adjustment cannot be used simultaneously - the RT/SYNC pin must be driven actively for synchronization, not pulled with a resistor.
What thermal performance can be expected from LM22670MRX-ADJ/J7002408 in HSOP-8 package?
In its HSOP-8 PowerPAD™ package, LM22670MRX-ADJ/J7002408 achieves 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 device includes thermal shutdown at 150°C and is rated for continuous operation from –40°C to +125°C junction temperature - verified across the LM22670-Q1 automotive variant lineage.
Is LM22670MRX-ADJ/J7002408 compatible with ceramic output capacitors?
Yes, LM22670MRX-ADJ/J7002408 is explicitly designed to be stable with low-ESR ceramic output capacitors - a key differentiator from older buck regulators requiring tantalum or electrolytic types. Its internal compensation and voltage-mode architecture tolerate the near-zero ESR of X5R/X7R ceramics, enabling smaller, more reliable, and longer-life output filtering. TI recommends ≥22 µF total ceramic capacitance with appropriate voltage rating and layout practices to ensure stability across load and line transients.
LM22670MRX-ADJ/J7002408 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
LM22670MRX-ADJ/J7002408 FAQ
1.How can I place an order for LM22670MRX-ADJ/J7002408 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670MRX-ADJ/J7002408 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 LM22670MRX-ADJ/J7002408 reliable?
The price and inventory of LM22670MRX-ADJ/J7002408 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM22670MRX-ADJ/J7002408 is usually 5 days.
3.What payment methods are accepted for LM22670MRX-ADJ/J7002408?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670MRX-ADJ/J7002408 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670MRX-ADJ/J7002408?
LM22670MRX-ADJ/J7002408 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670MRX-ADJ/J7002408 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 LM22670MRX-ADJ/J7002408?
For technical support, including LM22670MRX-ADJ/J7002408 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670MRX-ADJ/J7002408 requirements.
6.How does Aetrix verify that LM22670MRX-ADJ/J7002408 is sourced from the original manufacturer or authorized distributors?
All LM22670MRX-ADJ/J7002408 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 LM22670MRX-ADJ/J7002408 meets industry standards.
7.What is the process for return or replacement of LM22670MRX-ADJ/J7002408?
All LM22670MRX-ADJ/J7002408 units undergo pre-shipment inspection (PSI). If there is an issue with LM22670MRX-ADJ/J7002408, 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 LM22670MRX-ADJ/J7002408 part is unused and in its original packaging.
Return procedure for LM22670MRX-ADJ/J7002408:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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