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Texas Instruments LM22670QTJE-ADJ/NOPB
- Part No.:
- LM22670QTJE-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22670QTJE-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:347
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Product details
Overview
LM22670QTJE-ADJ/NOPB from Texas Instruments is a 42-V, 3-A synchronous step-down DC/DC regulator in HSOP-8 PowerPAD™ package, featuring voltage-mode PWM control, internal loop compensation, and adjustable output down to 1.285 V. It delivers >90% efficiency at full load with 500-kHz default switching frequency and supports industrial power rails (24 V, 12 V) requiring robust input range and thermal resilience.
For engineers reviewing the LM22670QTJE-ADJ/NOPB datasheet, LM22670QTJE-ADJ/NOPB pinout, LM22670QTJE-ADJ/NOPB application, or LM22670QTJE-ADJ/NOPB equivalent, key selection criteria include its 4.5–42 V input range, ±1.5% feedback reference accuracy, integrated bootstrap diode, precision enable threshold (1.6 V typ), and thermal shutdown at 150°C - all critical for high-reliability buck converter design in constrained layouts.
Technical Context
The LM22670QTJE-ADJ/NOPB implements a voltage-mode PWM architecture with input voltage feedforward to stabilize loop gain across wide VIN variations, enabling optimized transient response without external compensation. Its internal Type III compensator is tuned for outputs ≤5 V, supporting stable operation with low-ESR ceramic capacitors and standard power inductors.
Functional modes include active regulation, shutdown (25 µA quiescent current), and current-limit protection with foldback during severe overloads. The RT/SYNC pin enables three distinct oscillator configurations: internal 500-kHz default, resistor-adjustable 200 kHz–1 MHz, or external synchronization - but not simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports unregulated industrial and automotive rails without pre-regulation. |
| Output Current | Up to 3 A continuous - sufficient for FPGA core, DSP, or microcontroller power domains. |
| Feedback Reference | 1.285 V (typ), ±1.5% - sets minimum adjustable output; enables precise VOUT via external resistor divider. |
| Switching Frequency | 500 kHz (default), adjustable 200 kHz–1 MHz - balances EMI, component size, and efficiency trade-offs. |
| RDS(ON) | 120 mΩ (PFM package) - reduces conduction loss at high load; validated for HSOP-8 thermal performance. |
| Enable Threshold | 1.6 V (typ), 0.6 V hysteresis - allows clean power sequencing with simple resistor dividers from upstream supplies. |
| Junction Temp Range | –40°C to +125°C - qualified for extended industrial environments without derating. |
Pinout & Package
LM22670QTJE-ADJ/NOPB uses the HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad soldered to PCB ground plane for enhanced heat dissipation (RθJA = 60°C/W with 1-in² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch Node Output | Drives external inductor; swings from GND to VIN; requires low-inductance layout to minimize ringing. |
| 2 VIN | Main Input Supply | Accepts 4.5–42 V; powers internal circuitry and high-side MOSFET driver; bypass with ≥10 µF ceramic. |
| 3 BOOT | Bootstrap Capacitor Connection | Connects to SW and external 10 nF ceramic capacitor; enables floating gate drive for N-channel high-side switch. |
| 4 GND | Power Ground | System return path; tied to exposed pad; must be low-impedance connection for stability and thermal performance. |
| 5 RT/SYNC | Oscillator Control | Selects operating mode: floating = 500 kHz, resistor-to-GND = adjustable freq, external clock = sync - latched at startup. |
| 6 FB | Feedback Input | Senses output voltage 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 direct VIN tie with 470 kΩ resistor. |
| 8 EP | Exposed Thermal Pad | Internally connected to GND; must be soldered to PCB ground plane for thermal management and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Internally Compensated Control | Eliminates need for external compensation network - reduces BOM count and layout sensitivity for ≤5 V outputs. |
| Integrated Bootstrap Diode | Removes external bootstrap diode requirement - simplifies layout and improves reliability in high-frequency operation. |
| Adjustable Soft-Start | Fixed 500 µs ramp time - prevents inrush current and output overshoot during power-up without external components. |
| Stable with Ceramic Output Caps | Validated for low-ESR ceramic capacitors - enables compact, low-profile output filtering versus electrolytic alternatives. |
| WEBENCH® Enabled | Full online design support including component selection, thermal simulation, and schematic generation - accelerates prototyping. |
Applications
| Industrial Motor Drives | Telecom Power Modules |
|---|---|
Use Scenario: Powering gate drivers and isolated bias supplies in servo amplifier stages fed from 24-V bus. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3.3 V/3 A to logic and interface ICs with tight line/load regulation. Use Value: 4.5–42 V input range accommodates brownout and surge conditions on factory floor wiring; thermal shutdown protects during stalled motor events. | Use Scenario: Generating 5 V for Ethernet PHYs and management controllers in 19-inch rack-mounted switches. IC Role / Device Role / Timing Role: Secondary-stage point-of-load regulator converting 12 V backplane to 5 V with minimal footprint. Use Value: 500-kHz switching enables small 2.2-µH inductors and 22-µF ceramic caps; HSOP-8 PowerPAD™ meets telecom thermal density requirements. |
| Embedded Vehicle Telematics | Programmable Logic Controllers (PLCs) |
Use Scenario: Powering ARM Cortex-M7 MCU and CAN transceivers in automotive-grade telematics units. IC Role / Device Role / Timing Role: Main 3.3-V supply derived from 12-V battery rail with cold-crank tolerance down to 4.5 V. Use Value: Precision enable (1.6 V threshold) enables controlled sequencing with ignition-sensed 5-V rail; –40°C to +125°C rating ensures operation under hood conditions. | Use Scenario: Providing 1.8 V and 3.3 V rails for FPGA I/O banks and real-time processor cores in industrial automation modules. IC Role / Device Role / Timing Role: Adjustable-output buck converter configured for 1.8 V using FB divider; supports dynamic voltage scaling. Use Value: ±1.5% feedback accuracy maintains FPGA core voltage within JEDEC spec; current limit protects against shorted I/O traces in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22671QWJE-ADJ/NOPB | Automotive-grade AEC-Q100 Grade 1 (–40°C to +125°C), identical electrical specs and pinout. | Required for automotive safety-critical systems where qualification documentation and PPAP support are mandatory. | Select when automotive qualification, traceability, and extended temperature validation are required - otherwise LM22670QTJE-ADJ/NOPB suffices for industrial use. |
| LM2596T-ADJ/NOPB | Lower 40-V max input, 3-A rating, but fixed 150-kHz switching and no RT/SYNC or soft-start; TO-220 package. | Suitable for cost-sensitive, non-EMI-critical applications where board space and thermal performance are less constrained. | Choose only if 500-kHz operation, synchronization, or HSOP-8 thermal profile are not needed - LM22670QTJE-ADJ/NOPB offers superior integration and performance. |
Compared with LM22671QWJE-ADJ/NOPB, the LM22670QTJE-ADJ/NOPB lacks AEC-Q100 certification but matches all electrical and thermal specs for industrial use; versus LM2596T-ADJ/NOPB, it provides higher frequency, better accuracy, integrated soft-start, and superior thermal packaging - making it optimal for space-constrained, high-performance buck designs.
Availability
LM22670QTJE-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial motor drives, telecom power modules, and embedded vehicle telematics requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for LM22670QTJE-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 designed for ease-of-use in industrial, telecom, and embedded systems - emphasizing minimal external components, internal compensation, and robust operation across harsh input conditions.
FAQ
What is the minimum output voltage achievable with LM22670QTJE-ADJ/NOPB?
The LM22670QTJE-ADJ/NOPB has a nominal feedback reference voltage of 1.285 V, which sets the lowest possible output voltage when the FB pin is directly connected to VOUT (i.e., no resistor divider). This value is specified with ±1.5% accuracy over –40°C to +125°C, making 1.285 V the practical minimum for stable regulation. Lower voltages are not supported due to internal reference architecture.
Does LM22670QTJE-ADJ/NOPB require an external bootstrap diode?
No, the LM22670QTJE-ADJ/NOPB integrates a bootstrap diode internally, eliminating the need for an external component between BOOT and SW pins. Users must still place a 10-nF ceramic capacitor directly between BOOT and SW with short, wide PCB traces to ensure proper gate drive for the high-side N-channel MOSFET - a key design requirement confirmed in the official datasheet.
Can LM22670QTJE-ADJ/NOPB synchronize to an external clock?
Yes, LM22670QTJE-ADJ/NOPB supports external synchronization via the RT/SYNC pin, provided the incoming clock signal meets datasheet specifications: rising-edge triggered, frequency between 500 kHz and 1 MHz, amplitude compliant with VSYNC thresholds (1.75 V min), and stable during startup. Synchronization mode is latched at power-on and reverts to 500 kHz if the external clock is lost during operation.
What thermal pad connection is required for LM22670QTJE-ADJ/NOPB?
The exposed thermal pad (EP) of LM22670QTJE-ADJ/NOPB must be soldered to a PCB ground plane with adequate copper area (minimum 1 in² recommended) to achieve the specified RθJA of 60°C/W. TI's datasheet explicitly states the pad is internally connected to GND - omitting this connection degrades thermal performance and risks junction temperature exceedance under 3-A load conditions.
How does the enable function behave during input undervoltage conditions?
The LM22670QTJE-ADJ/NOPB features dual enable control: a precision EN pin (1.6 V threshold) and internal UVLO (4.3 V rising, 3.9 V falling). When VIN drops below UVLO thresholds, the device shuts down regardless of EN state. However, EN can be used independently - e.g., with a resistor divider - to set a custom turn-on voltage above UVLO, preventing premature activation during cold-crank or brownout events.
LM22670QTJE-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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-7 Thin
LM22670QTJE-ADJ/NOPB FAQ
1.How can I place an order for LM22670QTJE-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670QTJE-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 LM22670QTJE-ADJ/NOPB reliable?
The price and inventory of LM22670QTJE-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 LM22670QTJE-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22670QTJE-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670QTJE-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670QTJE-ADJ/NOPB?
LM22670QTJE-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670QTJE-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 LM22670QTJE-ADJ/NOPB?
For technical support, including LM22670QTJE-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670QTJE-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22670QTJE-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22670QTJE-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 LM22670QTJE-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22670QTJE-ADJ/NOPB?
All LM22670QTJE-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22670QTJE-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 LM22670QTJE-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22670QTJE-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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