My Inquiry
My Account
Texas Instruments LM22677QTJ-5.0/NOPB
- Part No.:
- LM22677QTJ-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-7 Thin
- Datasheet:
-
LM22677QTJ-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 5A TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:1,598
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM22677QTJ-5.0/NOPB from Texas Instruments is a 42-V input, 5-A synchronous step-down DC/DC regulator with fixed 5.0 V output, 500 kHz switching frequency, ±1.5% feedback reference accuracy, and integrated 100-mΩ N-channel MOSFET. It operates across –40°C to +125°C junction temperature and supports industrial power rails converting 12 V or 24 V to stable 5 V for microcontroller core logic.
For engineers reviewing the LM22677QTJ-5.0/NOPB datasheet, LM22677QTJ-5.0/NOPB pinout, LM22677QTJ-5.0/NOPB application, or LM22677QTJ-5.0/NOPB equivalent, key selection criteria include its fixed-output configuration, TO-263-7 (NDR) thermal package, precision enable threshold (1.6 V typ), internal soft-start (500 µs), and compatibility with low-ESR ceramic output capacitors without external compensation.
Technical Context
The LM22677QTJ-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward to stabilize loop gain against VIN variations, enabling optimized transient response. Its internal Type III compensation is tuned for fixed 5 V output operation, eliminating need for external compensation components.
It integrates a bootstrap diode and gate driver for high-side N-FET operation, requiring only a 10 nF ceramic capacitor between BOOT and SW pins. The device supports three oscillator modes-internal 500 kHz default, resistor-adjustable (200–1000 kHz), or external synchronization-though frequency adjustment and sync cannot operate simultaneously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports wide industrial and telecom input rails including 12 V, 24 V, and 36 V systems |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider; enables direct powering of 5 V logic, USB peripherals, and analog circuitry |
| Max Output Current | 5 A - delivers full rated load with thermal derating per RθJA = 22°C/W on 1-in² copper pad |
| Switching Frequency | 500 kHz (default) - enables compact 2.2 µH inductors and low-ESR ceramic capacitors; adjustable 200–1000 kHz via RT/SYNC pin |
| MOSFET RDS(ON) | 100 mΩ (typ) - reduces conduction loss at 5 A; contributes to >90% peak efficiency at mid-load |
| Enable Threshold | 1.6 V (typ), 0.6 V hysteresis - allows precise power sequencing with resistor dividers from upstream rails |
| Quiescent Current | 3.4 mA (typ) - maintains regulation under light load; drops to 25 µA in shutdown mode |
Pinout & Package
LM22677QTJ-5.0/NOPB uses the TO-263-7 (NDR) thermally enhanced package with exposed pad (EP) soldered to PCB ground for optimal thermal performance. Package dimensions are 10.16 mm × 9.85 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Drives external inductor; swings from ~0 V to VIN; requires low-inductance layout to minimize EMI |
| VIN | Main input supply | Connects to bulk input capacitor; must handle peak 5 A switch current and ripple |
| BOOT | Bootstrap supply | Provides gate drive voltage for high-side FET; requires 10 nF ceramic cap to SW with short traces |
| GND | Power ground | Common return for input/output paths; ties to EP for thermal and noise control |
| RT/SYNC | Oscillator control | Selects operating mode: floating = 500 kHz, resistor-to-GND = adjustable freq, external clock = sync mode |
| FB | Feedback input | Internally tied to 5 V reference; not connected externally for -5.0 variant |
| EN | Enable control | Active-high logic input; 1.6 V threshold enables startup; 25 µA shutdown current enables low-power sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boot-strap diode | Eliminates external bootstrap diode; simplifies layout and reduces BOM count for high-side gate drive |
| Internal soft-start | 500 µs fixed ramp time prevents inrush current and output overshoot during power-up |
| Stable with ceramic capacitors | Supports low-ESR MLCCs without external compensation; reduces board space and cost vs. electrolytic solutions |
| Precision enable with UVLO | Enables reliable multi-rail sequencing and prevents operation below 4.3 V input (rising threshold) |
| Thermal shutdown & current limit | Protects against sustained overloads and PCB overheating; latches off until reset by cycling EN or VIN |
Applications
| Industrial Control PLC I/O Module | Telecom Line Card Power |
|---|---|
Use Scenario: Providing isolated 5 V rail for digital I/O buffers, ADC references, and CAN transceivers in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V from 24 V backplane; handles 5 A peak loads during solenoid actuation. Use Value: Fixed 5 V output eliminates feedback resistor errors; thermal robustness ensures reliability in unventilated enclosures up to +70°C ambient. | Use Scenario: Generating local 5 V supply for FPGA configuration, SerDes bias, and management MCU on telecom line cards powered from –48 V or 24 V intermediate bus. IC Role / Device Role / Timing Role: Secondary buck converter stepping down 24 V to 5 V; synchronized to system clock via RT/SYNC to suppress switching noise in sensitive analog sections. Use Value: 500 kHz switching enables small 2.2 µH inductors; internal compensation avoids tuning delays during design validation. |
| Embedded System Main Logic Rail | Automotive Body Control Module (BCM) |
Use Scenario: Supplying 5 V to ARM Cortex-M7 microcontroller cores, Ethernet PHYs, and USB controllers in edge gateway devices. IC Role / Device Role / Timing Role: High-efficiency main regulator; operates from 12 V vehicle battery or 24 V industrial SMPS; supports dynamic voltage scaling. Use Value: ±1.5% output accuracy ensures compliance with 5 V ±5% logic supply specs; 125°C max junction temp supports extended temperature designs. | Use Scenario: Powering infotainment interface ICs and LIN transceivers in BCMs where input voltage varies from 6 V (cranking) to 16 V (charging). IC Role / Device Role / Timing Role: Automotive-grade buck regulator (LM22677-Q1 variant qualified); LM22677QTJ-5.0/NOPB used in non-AEC designs requiring same performance. Use Value: Wide 4.5–42 V input range accommodates cold-crank dips and load-dump transients; precision enable enables controlled wake-up from sleep mode. |
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 | Same architecture but 3 A rated; lower RDS(ON) = 130 mΩ; identical pinout and features | Suitable for <3 A loads; smaller thermal footprint; lower cost where full 5 A not required | Select when output current demand is ≤3 A and board space or cost optimization is critical |
| LM2596T-5.0/NOPB | 3 A, 40 V max input, 150 kHz fixed frequency; external compensation required; no sync capability | Limited to lower-frequency, higher-inductance designs; less suitable for EMI-sensitive or space-constrained layouts | Choose for legacy designs or cost-sensitive applications where 500 kHz switching and sync are unnecessary |
Compared with LM22670TJ-5.0/NOPB and LM2596T-5.0/NOPB, the LM22677QTJ-5.0/NOPB delivers 67% higher output current in the same TO-263-7 package while enabling higher switching frequencies and system-level synchronization-critical for noise-sensitive, high-density power architectures.
Availability
LM22677QTJ-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and embedded system applications requiring stable component supply, long-term lifecycle support, and automotive-qualified alternatives (LM22677-Q1).
Supply support for LM22677QTJ-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 DC/DC conversion.
The LM22677 product line delivers SIMPLE SWITCHER® step-down regulators targeting industrial, telecom, and automotive power systems needing high input voltage tolerance, integrated FETs, and minimal external components.
FAQ
What is the maximum input voltage rating for LM22677QTJ-5.0/NOPB?
The LM22677QTJ-5.0/NOPB has an absolute maximum input voltage rating of 43 V, with recommended continuous operation from 4.5 V to 42 V. This wide range supports 24 V and 36 V industrial buses, as well as automotive 12 V systems with load-dump transients. Operation above 42 V risks permanent damage even for brief durations.
Does LM22677QTJ-5.0/NOPB require external compensation components?
No, LM22677QTJ-5.0/NOPB features fully internal Type III compensation optimized for fixed 5 V output. Unlike adjustable variants, it does not require external RC networks on the FB pin. This simplifies design, reduces BOM count, and eliminates stability tuning-verified across standard inductor/capacitor combinations supported by TI's WEBENCH® tool.
Can LM22677QTJ-5.0/NOPB synchronize to an external clock signal?
Yes, LM22677QTJ-5.0/NOPB supports external synchronization via the RT/SYNC pin. When driven with a clean 0–5 V square wave at 50% duty cycle and frequency between 500 kHz and 1 MHz, the device locks to the rising edge. Synchronization must be established at startup; loss of clock causes automatic reversion to internal 500 kHz operation.
What thermal performance can be expected from LM22677QTJ-5.0/NOPB in a standard PCB layout?
With the exposed pad (EP) soldered to ≥1 in² of 2-oz copper, LM22677QTJ-5.0/NOPB achieves RθJA = 22°C/W. At 5 A load and 12 V input, typical power dissipation is ~1.25 W, resulting in ~27.5°C junction rise above ambient-well within the –40°C to +125°C operating range. Thermal derating begins above 85°C ambient without forced air.
Is LM22677QTJ-5.0/NOPB pin-compatible with other members of the LM22677 family?
Yes, LM22677QTJ-5.0/NOPB shares identical TO-263-7 (NDR) pinout and footprint with all LM22677 variants including LM22677-ADJ and LM22677-Q1. This enables drop-in replacement across adjustable and fixed-output versions, and between commercial and automotive-grade parts-provided thermal and electrical requirements remain compatible.
LM22677QTJ-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:
- Obsolete
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263-7 Thin
LM22677QTJ-5.0/NOPB FAQ
1.How can I place an order for LM22677QTJ-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22677QTJ-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 LM22677QTJ-5.0/NOPB reliable?
The price and inventory of LM22677QTJ-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 LM22677QTJ-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22677QTJ-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22677QTJ-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22677QTJ-5.0/NOPB?
LM22677QTJ-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22677QTJ-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 LM22677QTJ-5.0/NOPB?
For technical support, including LM22677QTJ-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22677QTJ-5.0/NOPB requirements.
6.How does Aetrix verify that LM22677QTJ-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22677QTJ-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 LM22677QTJ-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22677QTJ-5.0/NOPB?
All LM22677QTJ-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22677QTJ-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 LM22677QTJ-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22677QTJ-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM22677QTJ-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…
