My Inquiry
My Account
Texas Instruments LM22679TJ-5.0/NOPB
- Part No.:
- LM22679TJ-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22679TJ-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 5A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:524
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM22679TJ-5.0/NOPB from Texas Instruments is a 42-V input, 5-A synchronous step-down DC/DC regulator in TO-263-7 (PFM) package, featuring fixed 5.0-V output, 500-kHz switching frequency, ±1.5% feedback reference accuracy, and integrated bootstrap diode. It delivers >90% efficiency in industrial power supplies requiring wide VIN and robust thermal performance.
For engineers reviewing the LM22679TJ-5.0/NOPB datasheet, LM22679TJ-5.0/NOPB pinout, LM22679TJ-5.0/NOPB application, or LM22679TJ-5.0/NOPB equivalent, key selection criteria include its 4.5–42-V input range, adjustable current limit via IADJ pin, internal voltage-mode compensation, thermal shutdown at 150°C, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The LM22679TJ-5.0/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across input variations, enabling optimized transient response without external compensation. Its internal 100-mΩ N-channel MOSFET switch supports up to 5 A continuous load current with minimum on-time of 100 ns and minimum off-time of 200 ns.
It integrates a bootstrap gate driver requiring an external 10-nF ceramic capacitor between BOOT and SW pins, and features undervoltage lockout (UVLO) with 4.3-V turn-on threshold. Soft-start is programmable via external capacitor on SS pin, and current limit is adjustable using a resistor from IADJ to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports wide-input industrial and automotive battery-fed systems without pre-regulation |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider, simplifies BOM and layout for 5-V rail generation |
| Switching Frequency | 500 kHz - enables compact magnetics and high-frequency filtering while maintaining good efficiency |
| Max Output Current | 5 A - sufficient for powering FPGA I/O banks, microcontroller cores, or multi-rail PMIC inputs |
| RDS(ON) | 100 mΩ (typ) - reduces conduction loss and thermal stress under full load at 42-V input |
| Junction Temp Range | –40°C to 125°C - qualified for harsh environments including industrial control cabinets and test equipment |
| Thermal Resistance | RθJA = 22°C/W (with 1-in² copper) - enables reliable operation at full load without forced air in standard PCB layouts |
Pinout & Package
LM22679TJ-5.0/NOPB uses the TO-263-7 (PFM) package with exposed pad (EP), measuring 10.16 mm × 9.85 mm. The exposed pad must be soldered to a thermal pad on PCB connected to system ground for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch Node | Drives external inductor; swings from ~0 V to VIN; requires low-inductance routing to minimize ringing |
| VIN | Input Supply | Primary power input (4.5–42 V); must be decoupled with ≥10-µF ceramic near pin |
| BOOT | Bootstrap Supply | Connects to 10-nF ceramic capacitor between BOOT and SW; enables high-side MOSFET gate drive |
| GND | Power Ground | System return path; connects directly to exposed pad for thermal and noise control |
| IADJ | Current Limit Adjust | Resistor to GND sets peak switch current (default 7.1 A); floating = factory default |
| FB | Feedback Input | Internally tied to 5-V reference; connect directly to output for fixed 5-V regulation |
| SS | Soft-Start Control | Capacitor to GND extends startup time; 100 nF → ~2.6 ms soft-start duration |
Key Features
| Feature | Design Value |
|---|---|
| Internally Compensated Voltage Mode Control | Eliminates need for external compensation network - reduces design cycle time and component count |
| Stable with Low-ESR Ceramic Capacitors | Supports X5R/X7R MLCCs at output - avoids bulkier electrolytics and improves reliability over temperature |
| Adjustable Soft-Start | Single external capacitor sets ramp time - prevents inrush current damage to input source and downstream loads |
| Integrated Bootstrap Diode | Removes need for external bootstrap diode - simplifies layout and improves startup reliability |
| Thermal Shutdown & Cycle-by-Cycle Current Limit | Protects against sustained overload and PCB overheating - ensures safe fault recovery without latch-off |
Applications
| Industrial Distributed Power | Test & Measurement Equipment |
|---|---|
Use Scenario: Generating stable 5-V rails from 24-V or 48-V backplanes in PLC I/O modules and motor drives. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5-V supply to microcontrollers, ADCs, and isolated communication interfaces. Use Value: Wide 4.5–42-V input range accommodates brownout and surge conditions common in factory-floor power distribution. | Use Scenario: Powering precision analog front-ends and digital logic in portable oscilloscopes and multimeters. IC Role / Device Role / Timing Role: High-efficiency intermediate regulator converting battery or adapter input to clean 5-V domain for mixed-signal subsystems. Use Value: >90% efficiency and low output ripple preserve battery life and reduce thermal drift in measurement circuits. |
| Appliance Control Boards | General-Purpose Wide VIN Systems |
Use Scenario: Providing 5-V bias for touch controllers, display drivers, and sensor hubs in smart home appliances. IC Role / Device Role / Timing Role: Main system regulator operating from rectified AC line or 12–36-V DC bus in white goods and HVAC controls. Use Value: –40°C to 125°C junction rating ensures reliable operation inside enclosed, thermally stressed enclosures. | Use Scenario: Enabling single-supply designs in field-deployable IoT gateways and edge nodes powered by solar, PoE+, or industrial batteries. IC Role / Device Role / Timing Role: Flexible buck converter supporting multiple input sources without redesigning power architecture. Use Value: Pin-compatible variants (e.g., LM22679TJ-ADJ) allow same PCB layout for 3.3-V, 5-V, or adjustable outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670TJ-5.0/NOPB | 3-A rated version; identical pinout, package, and feature set except lower current capability | Suitable for <3-A loads where thermal margin or cost reduction is prioritized over headroom | Select when full 5-A capability is unnecessary - reduces board area and cost without layout change |
| LM61460PWRR | 6-A, 3–36-V input, lower quiescent current (15 µA), integrated EMI filters, PFM/PWM hybrid mode | Targeted at battery-powered and noise-sensitive applications requiring higher efficiency and lower standby loss | Choose for next-gen designs needing improved light-load efficiency and certified EMI performance - requires new layout |
Compared with LM22679TJ-5.0/NOPB, LM22670TJ-5.0/NOPB offers identical functionality at reduced current capacity, while LM61460PWRR provides higher integration, better EMI behavior, and broader light-load efficiency - but demands PCB redesign and lacks AEC-Q100 qualification.
Availability
LM22679TJ-5.0/NOPB is available at Aetrix Electronics and suitable for industrial distributed power, test and measurement equipment, and appliance control boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM22679TJ-5.0/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 LM22679 series belongs to TI's SIMPLE SWITCHER® family - designed for ease-of-use in wide-input DC/DC applications, minimizing external components and enabling rapid design-in via WEBENCH® tools.
FAQ
What is the maximum input voltage rating for LM22679TJ-5.0/NOPB?
The absolute maximum input voltage for LM22679TJ-5.0/NOPB is 43 V, with recommended operating range from 4.5 V to 42 V. Exceeding 42 V may trigger overvoltage protection or degrade long-term reliability. The device maintains regulation and thermal safety within this window across its full –40°C to 125°C junction temperature range, making it suitable for 36-V nominal battery systems with surge tolerance.
Does LM22679TJ-5.0/NOPB require external compensation components?
No, LM22679TJ-5.0/NOPB features fully internal voltage-mode loop compensation optimized for fixed 5-V output. This eliminates external RC networks typically needed for stability tuning, reducing bill-of-materials count and layout complexity. Stability is verified across standard inductor/capacitor combinations, and TI's WEBENCH® Designer tool validates performance before prototyping.
How is the current limit configured on LM22679TJ-5.0/NOPB?
The current limit on LM22679TJ-5.0/NOPB is set via the IADJ pin: leaving it floating configures the default 7.1-A (typ) peak switch current limit, while connecting a resistor from IADJ to GND adjusts the limit per Figure 7-3 in the datasheet. The adjustment accuracy is +35%/–25%, and resistor values must stay within specified bounds to avoid invalid settings or startup failure.
Can LM22679TJ-5.0/NOPB operate with ceramic output capacitors only?
Yes, LM22679TJ-5.0/NOPB is explicitly designed to be stable with low-ESR ceramic capacitors - no electrolytic or tantalum bulk capacitance required. A typical design uses 100–220 µF X5R/X7R MLCCs at the output. This improves reliability, reduces footprint, and avoids aging-related capacitance drift common in wet electrolytics.
What thermal management guidance applies to LM22679TJ-5.0/NOPB?
LM22679TJ-5.0/NOPB requires the exposed pad (EP) to be soldered to a dedicated thermal pad connected to ≥1 in² of 2-oz copper on the PCB for RθJA = 22°C/W. Thermal vias under the pad (≥6×0.3-mm diameter) to inner ground planes further reduce junction-to-board resistance. At 5-A load and 42-V input, proper copper area prevents exceeding the 125°C max junction temperature in still-air conditions.
LM22679TJ-5.0/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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5A
- 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
LM22679TJ-5.0/NOPB FAQ
1.How can I place an order for LM22679TJ-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22679TJ-5.0/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 LM22679TJ-5.0/NOPB reliable?
The price and inventory of LM22679TJ-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM22679TJ-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22679TJ-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22679TJ-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22679TJ-5.0/NOPB?
LM22679TJ-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22679TJ-5.0/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 LM22679TJ-5.0/NOPB?
For technical support, including LM22679TJ-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22679TJ-5.0/NOPB requirements.
6.How does Aetrix verify that LM22679TJ-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22679TJ-5.0/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 LM22679TJ-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22679TJ-5.0/NOPB?
All LM22679TJ-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22679TJ-5.0/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 LM22679TJ-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22679TJ-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22679TJ-5.0/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
