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Texas Instruments LM22670TJE-ADJ/NOPB
- Part No.:
- LM22670TJE-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22670TJE-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:4,331
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Product details
Overview
LM22670TJE-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 (≥1.285 V), 500-kHz default switching frequency, internal voltage-mode compensation, and integrated bootstrap diode. It delivers >90% efficiency in industrial power rails converting 24-V/12-V inputs to sub-5-V logic supplies.
For engineers reviewing the LM22670TJE-ADJ/NOPB datasheet, LM22670TJE-ADJ/NOPB pinout, LM22670TJE-ADJ/NOPB application, or LM22670TJE-ADJ/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), feedback reference accuracy (±1.5%), thermal performance (RθJA = 60°C/W), and enable threshold hysteresis (0.6 V).
Technical Context
The LM22670TJE-ADJ/NOPB implements a voltage-mode PWM controller with input voltage feedforward for stable loop gain across wide VIN variations. Its internal Type III compensation network is optimized for output voltages ≤5 V and eliminates external compensation components.
It integrates a 120-mΩ N-channel MOSFET switch, precision enable input (1.6 V threshold, 0.6 V hysteresis), and self-synchronizing RT/SYNC pin supporting 200 kHz–1 MHz frequency adjustment or system-level clock synchronization - but not both 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 multi-rail embedded systems. |
| Feedback Reference | 1.285 V (typ), ±1.5% - enables precise adjustable output down to 1.285 V with external resistor divider. |
| Switching Frequency | 500 kHz (default), adjustable 200 kHz–1 MHz - balances EMI control, inductor size, and transient response. |
| Quiescent Current | 3.4 mA (active), 25 µA (shutdown) - minimizes standby power loss in always-on subsystems. |
| Thermal Resistance | RθJA = 60°C/W (HSOP-8 w/ 1-in² copper) - requires standard PCB thermal relief for full 3-A operation at 125°C junction. |
| Operating Junction Temp | –40°C to +125°C - qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
LM22670TJE-ADJ/NOPB uses the HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to GND plane for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node Output | Drives external inductor; swings between ~0 V and VIN; requires low-inductance layout to minimize ringing. |
| 2 VIN | Main Input Supply | Accepts 4.5–42 V; must be decoupled near pin with low-ESR ceramic capacitor. |
| 3 BOOT | Bootstrap Capacitor Connection | Connects to SW via 10-nF ceramic cap; supplies gate drive for high-side MOSFET. |
| 4 GND | Power Ground | System return path; ties to exposed pad for thermal and electrical integrity. |
| 5 RT/SYNC | Oscillator Control | Configures frequency (resistor-to-GND) or accepts external sync clock (rising-edge triggered). |
| 6 FB | Feedback Input | Senses output via resistor divider; internal 1.285-V reference sets VOUT = 1.285 × (1 + R1/R2). |
| 7 EN | Enable Input | Logic-controlled ON/OFF; 1.6 V threshold with 0.6 V hysteresis; internal 6-µA pullup allows floating-high operation. |
| 8 NC | No Connect | Not electrically bonded; may be used as thermal conductor or left unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Eliminates external Schottky diode, reducing BOM count and PCB area while maintaining reliable high-side gate drive. |
| Internal Loop Compensation | Removes need for external compensation network - simplifies design and improves consistency across production units. |
| Adjustable Soft-Start | Fixed 500-µs ramp time prevents inrush current and output overshoot during power-up without external timing components. |
| Stable with Ceramic Output Caps | Supports low-ESR ceramic capacitors (no electrolytic required), enabling compact, high-reliability output filtering. |
| Precision Enable with UVLO | Enables clean power sequencing and optional external undervoltage lockout using resistor divider from VIN. |
Applications
| Industrial PLC Power | Telecom Line Card |
|---|---|
Use Scenario: Converting 24-V field bus to 3.3-V/1.8-V rails for programmable logic controllers and I/O modules. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated, low-noise power to microcontrollers and analog front-ends. Use Value: Wide 4.5–42-V input accommodates brownout and surge conditions; 125°C operation ensures reliability in enclosed cabinets. |
Use Scenario: Generating isolated 5-V and 3.3-V supplies on telecom line cards powered from –48-V or 24-V backplanes. IC Role / Device Role / Timing Role: Non-isolated point-of-load converter providing efficient, tightly regulated secondary rails. Use Value: 500-kHz switching enables small magnetics; ±1.5% feedback accuracy maintains compliance with GR-63-CORE hold-up requirements. |
| Automotive Body Control | Embedded Edge Gateway |
Use Scenario: Powering CAN transceivers, sensors, and MCU peripherals from 12-V battery with cold-crank tolerance. IC Role / Device Role / Timing Role: High-input-voltage buck regulator with precision enable for controlled wake-up/sleep sequencing. Use Value: 4.5-V minimum input and –40°C to 125°C rating meet automotive ambient requirements; EN hysteresis prevents chatter during battery dip. |
Use Scenario: Supplying dual-core ARM processors and DDR memory interfaces in industrial IoT gateways. IC Role / Device Role / Timing Role: Main system regulator delivering 1.1-V core and 1.8-V I/O voltages from 12-V input. Use Value: Internal compensation and ceramic-cap stability reduce design iteration time; WEBENCH® integration accelerates validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671TJE-ADJ/NOPB | Same pinout, 500-kHz fixed frequency only (no RT/SYNC adjust/sync), 2.5-A max output. | Lacks frequency flexibility and 3-A capability; suitable only for lower-current, cost-sensitive designs. | Select when frequency tuning or synchronization is unnecessary and load current stays below 2.5 A. |
| TPS54340DDAR | 42-V, 3.5-A, adjustable frequency (100 kHz–2.5 MHz), no integrated bootstrap diode. | Requires external bootstrap diode; higher max current but greater external component count and layout sensitivity. | Choose when higher switching frequency or >3-A capability is needed, and board space permits added discretes. |
Compared with LM22671TJE-ADJ/NOPB, the LM22670TJE-ADJ/NOPB adds frequency adjust/sync and 0.5-A headroom; versus TPS54340DDAR, it trades external diode complexity for fixed 500-kHz baseline and tighter thermal footprint in HSOP-8.
Availability
LM22670TJE-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and embedded edge gateway designs requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LM22670TJE-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 focused on analog and embedded processing technologies, serving industrial, automotive, and communications markets with high-reliability power management solutions.
The LM22670 series belongs to TI's SIMPLE SWITCHER® family - designed for ease-of-use in non-isolated DC/DC buck applications where minimal external components, internal compensation, and robust thermal performance are critical.
FAQ
What is the minimum output voltage supported by the LM22670TJE-ADJ/NOPB?
The LM22670TJE-ADJ/NOPB supports a minimum output voltage of 1.285 V (typical feedback reference voltage), set by its internal bandgap reference. With an external resistor divider on the FB pin, outputs as low as 1.285 V can be achieved - making it suitable for powering modern low-voltage logic and core supplies in embedded systems.
Does the LM22670TJE-ADJ/NOPB require an external bootstrap diode?
No, the LM22670TJE-ADJ/NOPB integrates a bootstrap diode internally, eliminating the need for an external Schottky diode between BOOT and SW pins. This reduces BOM count, saves PCB area, and improves reliability - confirmed in the device's Feature Description section and Pin Functions table.
Can the LM22670TJE-ADJ/NOPB synchronize to an external clock?
Yes, the LM22670TJE-ADJ/NOPB supports external clock synchronization via the RT/SYNC pin. When driven with a rising-edge clock signal between 500 kHz and 1 MHz (with amplitude meeting VSYNC ≥1.75 V), it locks to the external source - enabling EMI reduction and multi-regulator phase alignment in dense power systems.
What is the thermal performance of the LM22670TJE-ADJ/NOPB in its HSOP-8 package?
The LM22670TJE-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 copper area and airflow; for full 3-A operation at 125°C junction, proper thermal pad soldering and copper pour are essential.
How does the enable pin (EN) function on the LM22670TJE-ADJ/NOPB?
The EN pin on the LM22670TJE-ADJ/NOPB provides precision ON/OFF control with a 1.6 V (typ) turn-on threshold and 0.6 V (typ) hysteresis. It features an internal 6-µA pullup, allowing direct connection to VIN via a current-limiting resistor (e.g., 470 kΩ for 42-V input). Pulling EN below 1.6 V disables the regulator, reducing quiescent current to 25 µA (typ).
LM22670TJE-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-7 Thin
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-7 Thin
LM22670TJE-ADJ/NOPB FAQ
1.How can I place an order for LM22670TJE-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670TJE-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 LM22670TJE-ADJ/NOPB reliable?
The price and inventory of LM22670TJE-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 LM22670TJE-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670TJE-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670TJE-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670TJE-ADJ/NOPB?
LM22670TJE-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670TJE-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 LM22670TJE-ADJ/NOPB?
For technical support, including LM22670TJE-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670TJE-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22670TJE-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670TJE-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 LM22670TJE-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670TJE-ADJ/NOPB?
All LM22670TJE-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670TJE-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 LM22670TJE-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22670TJE-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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