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Texas Instruments LM22670MR-ADJ/J7002406
- Part No.:
- LM22670MR-ADJ/J7002406
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22670MR-ADJ/J7002406.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:3,538
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Product details
Overview
LM22670MR-ADJ/J7002406 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, ±1.5% feedback reference accuracy, and integrated bootstrap diode - used in industrial power rails converting 24-V/12-V inputs to point-of-load voltages.
For engineers reviewing the LM22670MR-ADJ/J7002406 datasheet, LM22670MR-ADJ/J7002406 pinout, LM22670MR-ADJ/J7002406 application, or LM22670MR-ADJ/J7002406 equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance with exposed pad, current limit (3.4–5.5 A), soft-start timing (500 µs), and RT/SYNC programmability for EMI-sensitive designs.
Technical Context
The LM22670MR-ADJ/J7002406 implements voltage-mode PWM control 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 and supports ceramic output capacitors with low ESR.
It integrates a 120-mΩ N-channel MOSFET switch (PFM package), precision enable with 1.6-V threshold and 0.6-V hysteresis, and self-synchronizable oscillator with three modes: internal 500-kHz default, resistor-adjustable (200 kHz–1 MHz), or external clock sync - though frequency adjust 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 unregulated 24-V/12-V industrial rails without pre-regulation. |
| Output Current | Up to 3 A continuous - sufficient for FPGA core, microcontroller, or DSP power domains with margin. |
| 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 via RT/SYNC resistor - balances efficiency, size, and EMI compliance. |
| Quiescent Current | 3.4 mA (typ) - ensures low no-load power loss in always-on systems like remote sensors or gateways. |
| Standby Current | 25 µA (typ) in shutdown - critical for battery-backed or energy-harvesting applications requiring ultra-low leakage. |
| Thermal Shutdown | 150°C junction - protects against sustained overload or poor heatsinking in enclosed enclosures. |
Pinout & Package
LM22670MR-ADJ/J7002406 uses the HSOP-8 PowerPAD™ package (4.89 mm × 3.90 mm) with exposed thermal pad connected to GND for enhanced heat dissipation. RθJA = 60°C/W with 1 in² copper; PCB layout must tie exposed pad directly to ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BOOT | Bootstrap supply node | Connects external 10-nF ceramic capacitor to SW; supplies gate drive for high-side MOSFET during on-time. |
| 2 - VIN | Main input supply | Accepts 4.5–42 V; powers internal LDO, gate driver, and control circuitry; requires local 10-µF ceramic input capacitor. |
| 3 - SW | Switch node | Drives external inductor; swings between ~0 V and VIN; requires short, low-inductance routing to minimize ringing. |
| 4 - GND | Power and signal ground | Reference for FB, EN, RT/SYNC; connects to exposed pad; must be low-impedance star point near input/output caps. |
| 5 - FB | Feedback input | Senses output via resistive divider; internal 1.285-V reference sets VOUT = 1.285 × (1 + R1/R2); bias current <230 nA. |
| 6 - RT/SYNC | Oscillator control | Floating = 500-kHz internal clock; resistor-to-GND = frequency adjust; external clock = synchronization mode. |
| 7 - EN | Enable input | Logic-level ON/OFF control; 1.6-V threshold with 0.6-V hysteresis; internal 6-µA pullup allows simple VIN-resistor enable. |
| 8 - EP (Exposed Pad) | Thermal & electrical ground | Mandatory GND connection; primary thermal path; solder coverage ≥90% required for rated 3-A operation. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates need for external compensation network; stable with ceramic output capacitors ≥10 µF. |
| Integrated bootstrap diode | Removes external Schottky diode; reduces BOM count and board area; enables compact high-efficiency buck design. |
| Adjustable switching frequency & sync | Enables EMI reduction by shifting switching spectrum away from sensitive bands or aligning multiple regulators. |
| Precision enable with UVLO support | Allows controlled power sequencing and system-level undervoltage protection using external resistor divider. |
| 500-µs fixed soft-start | Prevents inrush current and output overshoot during startup; resets automatically after shutdown or thermal fault. |
Applications
| Industrial PLC I/O Module | Telecom Remote Radio Unit |
|---|---|
|
Use Scenario: Powering isolated analog front-end and digital logic in DIN-rail mounted controllers operating from 24-V DC bus. IC Role / Device Role / Timing Role: Primary buck converter generating 3.3-V/1.8-V rails for ADCs, isolators, and ARM Cortex-M7 MCU. Use Value: Wide 4.5–42-V input range accommodates brownout and surge conditions on factory floor wiring; 3-A capability supports dual-rail loads. |
Use Scenario: Point-of-load regulation in outdoor 4G/5G small cell radios powered from -48-V telecom supply via intermediate 12-V rail. IC Role / Device Role / Timing Role: Secondary buck stage delivering stable 5-V and 1.2-V supplies to RF transceivers and baseband processors. Use Value: Synchronization capability eliminates beat frequencies between multiple converters; thermal pad ensures reliability at 60°C ambient. |
| Automotive Body Control Module | Embedded Medical Sensor Hub |
|
Use Scenario: Power management in non-safety-critical vehicle subsystems (e.g., lighting, HVAC controls) supplied from 12-V battery with load dump. IC Role / Device Role / Timing Role: Main 5-V and adjustable 3.3-V supply generator handling cold-crank (4.5-V) to load-dump (42-V) transients. Use Value: 42-V absolute max rating and built-in thermal shutdown protect against automotive voltage extremes without external clamping. |
Use Scenario: Battery-powered wearable diagnostic device requiring ultra-low standby power and precise sensor bias voltages. IC Role / Device Role / Timing Role: Efficient step-down regulator powering low-noise analog signal chain and BLE SoC from single Li-ion cell (3.0–4.2 V). Use Value: 25-µA shutdown current extends battery life; ±1.5% reference ensures accurate ADC reference and sensor excitation. |
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 | Same pinout, identical features, but rated for 45-V max input and includes improved thermal performance (RθJA = 55°C/W). | Better suited for higher-voltage industrial or railway applications where 42-V margin is insufficient. | Select LM22671MR-ADJ if operating near upper VIN limit or requiring extended thermal headroom. |
| TPS54340DDAR | 42-V, 3.5-A buck with current-mode control, 100-µA IQ, and adjustable soft-start - no integrated bootstrap diode. | Offers lower quiescent current and flexible soft-start, but requires external bootstrap diode and external compensation. | Choose TPS54340DDAR when ultra-low IQ or custom soft-start timing is prioritized over BOM simplicity. |
Compared with LM22670MR-ADJ/J7002406, LM22671MR-ADJ provides higher input voltage margin and slightly better thermal resistance, while TPS54340DDAR trades integrated bootstrap and internal compensation for lower IQ and current-mode control flexibility - neither is pin-compatible, requiring layout revision.
Availability
LM22670MR-ADJ/J7002406 is available at Aetrix Electronics and suitable for industrial control, telecom infrastructure, and embedded medical systems requiring stable component supply across long production lifecycles.
Supply support for LM22670MR-ADJ/J7002406 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 designing analog ICs, embedded processors, and power management solutions for industrial, automotive, and communications markets.
The LM22670MR-ADJ/J7002406 belongs to TI's SIMPLE SWITCHER® family - engineered for ease-of-use in high-voltage DC/DC conversion with minimal external components and full WEBENCH® design tool integration.
FAQ
What is the minimum output voltage supported by the LM22670MR-ADJ/J7002406?
The LM22670MR-ADJ/J7002406 supports a minimum output voltage of 1.285 V, set by its internal feedback reference voltage. This value is specified as 1.285 V (typical) with ±1.5% accuracy over temperature and line conditions. The device achieves this using an adjustable feedback divider; no external components are needed to reach the minimum VOUT, making it ideal for low-voltage logic and analog circuits.
Does the LM22670MR-ADJ/J7002406 require an external bootstrap diode?
No, the LM22670MR-ADJ/J7002406 integrates a bootstrap diode internally, eliminating the need for an external Schottky diode between BOOT and SW pins. This simplifies layout, reduces BOM count, and improves reliability. A 10-nF ceramic capacitor must still be placed between BOOT and SW with low-inductance traces to ensure proper gate drive voltage for the high-side MOSFET.
Can the LM22670MR-ADJ/J7002406 synchronize to an external clock?
Yes, the LM22670MR-ADJ/J7002406 can synchronize to an external clock applied to the RT/SYNC pin. The external clock must exceed 500 kHz and remain below 1 MHz, with valid high/low voltage levels meeting VSYNC thresholds (1.75 V min). Synchronization occurs on the rising edge; if the clock is lost, the device reverts to its internal 500-kHz oscillator. Note that current limit foldback is disabled during sync mode.
What is the thermal performance of the LM22670MR-ADJ/J7002406 in its HSOP-8 PowerPAD™ package?
The LM22670MR-ADJ/J7002406 in HSOP-8 PowerPAD™ 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; values range from 42–115°C/W. The exposed pad must be soldered to a solid GND plane to achieve rated 3-A output current and prevent thermal shutdown under continuous load.
How does the enable pin (EN) function on the LM22670MR-ADJ/J7002406?
The EN pin on the LM22670MR-ADJ/J7002406 provides precision ON/OFF control with a 1.6-V typical threshold and 0.6-V hysteresis. Pulling EN below 1.6 V disables the regulator, reducing input current to 25 µA (typ). An internal 6-µA pullup allows simple enable via resistor from VIN; a 470-kΩ resistor is recommended for 42-V input to limit zener current. EN also supports external UVLO implementation using a resistor divider.
LM22670MR-ADJ/J7002406 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
LM22670MR-ADJ/J7002406 FAQ
1.How can I place an order for LM22670MR-ADJ/J7002406 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22670MR-ADJ/J7002406 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 LM22670MR-ADJ/J7002406 reliable?
The price and inventory of LM22670MR-ADJ/J7002406 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM22670MR-ADJ/J7002406 is usually 5 days.
3.What payment methods are accepted for LM22670MR-ADJ/J7002406?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22670MR-ADJ/J7002406 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22670MR-ADJ/J7002406?
LM22670MR-ADJ/J7002406 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22670MR-ADJ/J7002406 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 LM22670MR-ADJ/J7002406?
For technical support, including LM22670MR-ADJ/J7002406 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22670MR-ADJ/J7002406 requirements.
6.How does Aetrix verify that LM22670MR-ADJ/J7002406 is sourced from the original manufacturer or authorized distributors?
All LM22670MR-ADJ/J7002406 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 LM22670MR-ADJ/J7002406 meets industry standards.
7.What is the process for return or replacement of LM22670MR-ADJ/J7002406?
All LM22670MR-ADJ/J7002406 units undergo pre-shipment inspection (PSI). If there is an issue with LM22670MR-ADJ/J7002406, 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 LM22670MR-ADJ/J7002406 part is unused and in its original packaging.
Return procedure for LM22670MR-ADJ/J7002406:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22670MR-ADJ/J7002406 Tags
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