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Texas Instruments LM22676TJE-ADJ/NOPB
- Part No.:
- LM22676TJE-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22676TJE-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:208
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Product details
Overview
LM22676TJE-ADJ/NOPB from Texas Instruments is a 42 V, 3 A synchronous step-down DC/DC regulator in an HSOP-8 PowerPAD package, featuring voltage-mode PWM control, internal compensation, and adjustable output down to 1.285 V. It delivers >90% efficiency at full load with 500 kHz fixed switching frequency and supports industrial input rails (4.5–42 V), making it suitable for 24 V bus conversion in programmable logic controllers.
For engineers reviewing the LM22676TJE-ADJ/NOPB datasheet, LM22676TJE-ADJ/NOPB pinout, LM22676TJE-ADJ/NOPB application, or LM22676TJE-ADJ/NOPB equivalent, key selection criteria include its ±1.5% feedback reference accuracy, integrated bootstrap diode, 25 µA shutdown current, thermal shutdown at 150°C, and compatibility with low-ESR ceramic output capacitors without external loop compensation.
Technical Context
The LM22676TJE-ADJ/NOPB implements a voltage-mode PWM architecture with input voltage feedforward to stabilize loop gain across wide VIN ranges. Its internal Type III compensation network is optimized for output voltages ≤5 V, enabling stable operation with minimal external components.
It integrates a 120 mΩ N-channel MOSFET switch, precision enable input with 1.6 V threshold and 0.6 V hysteresis, and a dedicated BOOT pin driving an external bootstrap capacitor for high-side gate drive. Minimum on-time (100 ns) and off-time (200 ns) constrain duty-cycle limits to support high VIN/VOUT ratios while ensuring boot-cap recharge and current-sense accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - Supports direct connection to 24 V industrial rails and automotive battery systems without pre-regulation. |
| Output Current | 3 A continuous - Delivers full rated load without derating at TJ ≤ 125°C with proper PCB thermal design. |
| Feedback Reference | 1.285 V ±1.5% - Sets minimum adjustable output; enables precise 3.3 V, 2.5 V, or custom rail generation via resistor divider. |
| Switching Frequency | 500 kHz ±20% - Enables compact magnetics and input/output filtering; supports fast transient response in embedded systems. |
| RDS(ON) | 120 mΩ (PFM package) - Limits conduction loss to <360 mW at 3 A, reducing thermal stress in HSOP-8 PowerPAD layout. |
| Quiescent Current | 3.4 mA typical - Maintains regulation efficiency at light loads without pulse-skipping artifacts common in PFM modes. |
| Shutdown Current | 25 µA typical - Enables ultra-low-power system standby states in battery-backed industrial sensors. |
Pinout & Package
LM22676TJE-ADJ/NOPB uses the HSOP-8 PowerPAD (also labeled PFM) package: 4.89 mm × 3.90 mm body with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (RθJA = 22°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Drives external power inductor; swings between GND and VIN; requires low-inductance routing to minimize EMI. |
| 2 VIN | Main input supply | Accepts 4.5–42 V; must be bypassed with ≥10 µF ceramic capacitor near pin to suppress high-frequency ripple. |
| 3 BOOT | Bootstrap supply | Connects to SW via 10 nF ceramic capacitor; supplies gate drive for internal high-side MOSFET. |
| 4 GND | System ground | Power and signal return; ties to exposed pad; must be low-impedance copper pour under IC body. |
| 5 FB | Feedback input | High-impedance (230 nA bias) node sensing output voltage divider; sensitive to noise-route away from SW. |
| 6 EN | Enable control | Logic-level input (1.6 V threshold); internal 6 µA pullup allows direct VIN tie for always-on operation. |
| 7 NC | No connect | Thermal pad conductor only-no electrical function; must remain unconnected to any signal net. |
| 8 NC | No connect | Thermal pad conductor only-no electrical function; must remain unconnected to any signal net. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated voltage-mode control | Eliminates need for external compensation network-reduces BOM count and layout sensitivity for 3.3 V/2.5 V outputs. |
| Integrated bootstrap diode | Removes requirement for external bootstrap diode-simplifies layout and improves reliability in high-duty-cycle applications. |
| Stable with ceramic output capacitors | Supports low-ESR MLCCs (≥22 µF) without oscillation-enables compact, low-profile output filtering for space-constrained designs. |
| Precision enable with UVLO | 1.6 V enable threshold + 0.6 V hysteresis enables clean power sequencing and prevents startup below 4.3 V input. |
| Fixed 500 kHz switching | Enables predictable EMI profile and consistent filter design-avoids variable-frequency noise spreading in EMC-critical systems. |
Applications
| Industrial Motor Drives | Telecom Power Modules |
|---|---|
Use Scenario: Powering gate drivers and isolated ADCs in servo amplifier boards operating from 24 V DC bus. IC Role / Device Role / Timing Role: Primary 3.3 V/2.5 V point-of-load regulator delivering clean, regulated supply to timing-critical digital interfaces. Use Value: 1.285 V reference accuracy and internal compensation ensure stable 3.3 V output across –40°C to 125°C ambient without tuning. |
Use Scenario: Generating 5 V auxiliary rail for management ASICs and fan controllers in 48 V telecom rectifier shelves. IC Role / Device Role / Timing Role: Secondary buck converter stepping down from intermediate 12 V bus to 5 V logic supply. Use Value: 42 V max input rating and 500 kHz switching allow compact 12 V→5 V conversion with <1% load regulation error. |
| Programmable Logic Controllers | Automated Test Equipment |
Use Scenario: Supplying I/O module microcontrollers and analog front-ends from ruggedized 24 V field wiring. IC Role / Device Role / Timing Role: Main system regulator providing isolated 3.3 V domain for FPGA configuration and sensor interface. Use Value: 25 µA shutdown current and precision enable enable deep-sleep modes during idle cycles without external circuitry. |
Use Scenario: Providing stable 2.5 V reference supply for high-speed DACs and clock buffers in PXI chassis backplanes. IC Role / Device Role / Timing Role: Low-noise, low-drift auxiliary regulator supporting jitter-sensitive timing circuits. Use Value: ±1.5% feedback accuracy and ceramic-capacitor stability maintain <±2 mV output deviation over temperature and line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670TJE-ADJ/NOPB | Lower 37 V max input, same 3 A rating and HSOP-8 package; 300 kHz switching frequency. | Better suited for 12 V/24 V-only systems where 42 V tolerance is unnecessary; lower fSW eases EMI filtering. | Select when input never exceeds 37 V and larger inductors/capacitors are acceptable for reduced switching loss. |
| TPS54302DDAR | 4.5–28 V input, 3 A, 2.5 V internal reference, no BOOT pin (integrated high-side FET driver). | Requires external bootstrap capacitor removal; lacks adjustable reference below 2.5 V; smaller SOIC-8 footprint. | Choose for cost-sensitive 24 V systems needing 3.3 V output where 1.285 V adjustability is not required. |
Compared with LM22676TJE-ADJ/NOPB, LM22670TJE-ADJ/NOPB trades 42 V robustness for lower EMI at 300 kHz, while TPS54302DDAR sacrifices input voltage range and reference flexibility for simplified layout and lower component count in mid-range industrial supplies.
Availability
LM22676TJE-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial motor drives, telecom power modules, and programmable logic controllers requiring stable component supply with long-term manufacturability and automotive-grade reliability.
Supply support for LM22676TJE-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 LM22676 series belongs to TI's SIMPLE SWITCHER® portfolio-designed specifically for ease-of-use in industrial, automotive, and telecom power systems where minimal external components and guaranteed stability are critical.
FAQ
What is the minimum output voltage achievable with LM22676TJE-ADJ/NOPB?
The LM22676TJE-ADJ/NOPB has a nominal feedback reference voltage of 1.285 V, which sets the lowest possible output voltage when using the adjustable version. With a properly designed resistor divider and low-ESR output capacitor, the device reliably regulates down to this value across its full operating temperature range (–40°C to 125°C) and input voltage range (4.5 V to 42 V). The ±1.5% reference accuracy ensures output tolerance remains within specification even at minimum VOUT.
Does LM22676TJE-ADJ/NOPB require an external bootstrap diode?
No, LM22676TJE-ADJ/NOPB integrates a bootstrap diode internally, eliminating the need for an external component between BOOT and SW pins. This simplifies layout, reduces bill-of-materials cost, and improves reliability by removing a potential failure point. Users must still place a 10 nF ceramic capacitor directly between BOOT and SW with short, wide traces to ensure proper high-side gate drive during each switching cycle.
Can LM22676TJE-ADJ/NOPB operate with ceramic output capacitors only?
Yes, LM22676TJE-ADJ/NOPB is explicitly characterized and stabilized for use with low-ESR ceramic output capacitors-no electrolytic or tantalum supplementation is required. TI's datasheet confirms stability with ≥22 µF X5R/X7R MLCCs, enabling compact, high-reliability output filtering ideal for industrial and telecom applications where capacitor lifetime and temperature stability are critical.
What thermal performance can be expected from LM22676TJE-ADJ/NOPB in HSOP-8 PowerPAD package?
In the HSOP-8 PowerPAD (PFM) package, LM22676TJE-ADJ/NOPB achieves a junction-to-ambient thermal resistance (RθJA) of 22°C/W when mounted on a standard 2-layer PCB with 1-in² copper pour connected to the exposed pad. This allows continuous 3 A operation up to 125°C junction temperature with appropriate airflow or heatsinking, meeting requirements for enclosed industrial enclosures without forced cooling.
Is LM22676TJE-ADJ/NOPB qualified for automotive applications?
No, LM22676TJE-ADJ/NOPB is not AEC-Q100 qualified. It belongs to the commercial/industrial LM22676 family. For automotive use, TI offers the LM22676-Q1 variant (e.g., LM22676Q-ADJ/NOPB), which is AEC-Q100 Grade 1 qualified (–40°C to +125°C) and undergoes additional stress testing. Designers requiring automotive qualification must select the -Q1 suffix part number-not LM22676TJE-ADJ/NOPB.
LM22676TJE-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
LM22676TJE-ADJ/NOPB FAQ
1.How can I place an order for LM22676TJE-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22676TJE-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 LM22676TJE-ADJ/NOPB reliable?
The price and inventory of LM22676TJE-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 LM22676TJE-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM22676TJE-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22676TJE-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22676TJE-ADJ/NOPB?
LM22676TJE-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22676TJE-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 LM22676TJE-ADJ/NOPB?
For technical support, including LM22676TJE-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22676TJE-ADJ/NOPB requirements.
6.How does Aetrix verify that LM22676TJE-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22676TJE-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 LM22676TJE-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM22676TJE-ADJ/NOPB?
All LM22676TJE-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22676TJE-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 LM22676TJE-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM22676TJE-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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