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Texas Instruments LM22676MRE-5.0/NOPB
- Part No.:
- LM22676MRE-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM22676MRE-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 3A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,761
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Product details
Overview
LM22676MRE-5.0/NOPB from Texas Instruments is a 42 V input, 3 A synchronous step-down DC/DC regulator with fixed 5.0 V output, 500 kHz switching frequency, ±1.5% feedback reference accuracy, and integrated bootstrap diode - used in industrial power rails requiring stable 5 V at up to 3 A from 12 V or 24 V inputs.
For engineers reviewing the LM22676MRE-5.0/NOPB datasheet, LM22676MRE-5.0/NOPB pinout, LM22676MRE-5.0/NOPB application, or LM22676MRE-5.0/NOPB equivalent, key selection criteria include input voltage range (4.5–42 V), thermal performance in PSOP-8 package, enable threshold hysteresis (0.6 V), minimum on-time (100 ns), and internal compensation optimized for fixed 5 V output.
Technical Context
The LM22676MRE-5.0/NOPB implements voltage-mode PWM control with input voltage feedforward to stabilize loop gain across wide VIN variations, enabling robust transient response without external compensation. Its internal 100 mΩ N-channel MOSFET switch and integrated bootstrap diode eliminate external high-side gate drive components.
It features precision enable with 1.6 V turn-on threshold and 0.6 V hysteresis, thermal shutdown at 150°C, current limiting at 3.4–5.3 A, and soft-start with fixed 500 µs ramp time. The device operates from –40°C to +125°C junction temperature and supports stable operation with low-ESR ceramic output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports direct regulation from 12 V, 24 V, and 42 V industrial bus rails without pre-regulation. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external feedback divider; enables plug-and-play 5 V supply for microcontrollers and logic. |
| Max Output Current | 3 A continuous - sufficient for powering FPGA I/O banks, DSP cores, or multiple peripheral ICs from single rail. |
| Switching Frequency | 500 kHz (±20%) - allows compact 10 µH–22 µH inductors and ≤100 µF ceramic output capacitance. |
| RDS(ON) | 100 mΩ (typ) - reduces conduction loss at full load; enables >90% efficiency at 12 VIN/5 VOUT, 2 A. |
| Enable Threshold | 1.6 V (typ) with 0.6 V hysteresis - supports clean power sequencing using resistor dividers from upstream supplies. |
| Quiescent Current | 3.4 mA (typ) - maintains low no-load power draw in always-on subsystems such as monitoring circuits. |
| Standby Current | 25 µA (typ) - enables ultra-low-power shutdown mode for battery-backed or energy-harvesting systems. |
Pinout & Package
LM22676MRE-5.0/NOPB uses the PSOP-8 (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 inductor; swings between GND and VIN; requires low-inductance layout to minimize EMI. |
| 2 VIN | Power input | Accepts 4.5–42 V; must be decoupled with ≥10 µF ceramic capacitor placed within 5 mm of pin. |
| 3 BOOT | Bootstrap supply | Connects to SW via 10 nF ceramic capacitor; supplies gate drive for internal high-side MOSFET. |
| 4 GND | System ground | Primary return path; connects to exposed pad; must tie all GND pins and pad to single low-impedance plane. |
| 5 FB | Feedback input | Internally connected to 5 V reference; shorted directly to VOUT for fixed-output operation. |
| 6 EN | Enable control | Active-high logic input; 1.6 V threshold enables startup; <1.3 V disables regulator and reduces IQ to 25 µA. |
| 7 NC | No connect | Not electrically bonded; serves only as thermal conductor; must be tied to GND for thermal performance. |
| 8 NC | No connect | Not electrically bonded; serves only as thermal conductor; must be tied to GND for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external Schottky diode required for high-side gate drive, reducing BOM count and board area. |
| Internally compensated | Enables stable 5 V output without external compensation network - simplifies design and improves repeatability. |
| Stable with ceramic capacitors | Supports low-ESR X5R/X7R MLCCs (≥10 µF) at output; avoids bulk electrolytic capacitors and associated aging/reliability issues. |
| Precision enable with UVLO | Combines 1.6 V enable threshold and 4.3 V input UVLO; prevents erratic startup during brownout or battery sag. |
| Thermal shutdown & current limit | Protects against sustained overload or PCB overheating; latches off until junction cools to ~135°C. |
| Soft-start (500 µs) | Controls inrush current into output capacitors; prevents input rail collapse and downstream reset glitches. |
Applications
| Industrial PLC I/O Module | Telecom Line Card Power |
|---|---|
|
Use Scenario: Regulating 24 V backplane to clean 5 V for digital isolators, ADCs, and interface logic in modular PLC chassis. IC Role / Device Role / Timing Role: Primary buck converter supplying isolated 5 V domain; handles 0–3 A dynamic load steps with <50 mV undershoot. Use Value: Fixed 5 V output and internal compensation reduce design cycle time; PSOP-8 thermal pad sustains 3 A at 70°C ambient without heatsink. |
Use Scenario: Generating 5 V from 48 V telecom rectified rail for Ethernet PHYs, management controllers, and LED drivers on line cards. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator with fast enable/disable for hot-swap compliance and power sequencing. Use Value: 42 V max input rating and 500 kHz switching allow compact magnetics; precision enable ensures controlled power-up across multi-rail systems. |
| Embedded Vision Sensor Hub | Automotive Body Control Module (BCM) |
|
Use Scenario: Providing regulated 5 V to image sensor interfaces, ISP processors, and USB transceivers in compact edge AI cameras. IC Role / Device Role / Timing Role: Single-chip 5 V supply replacing discrete buck controller + MOSFET; synchronized via external clock if needed. Use Value: Small PSOP-8 footprint saves space; 100 mΩ RDS(ON) minimizes self-heating in sealed enclosures; -40°C to +125°C rating covers extended temp range. |
Use Scenario: Powering microcontroller peripherals, LIN transceivers, and LED drivers in non-safety-critical BCM subassemblies. IC Role / Device Role / Timing Role: Secondary 5 V regulator fed from main 12 V battery rail; enabled only during ignition-on state. Use Value: 25 µA shutdown current extends battery life in parked vehicle mode; automotive-grade LM22676-Q1 variant available for AEC-Q100 Grade 1 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM22670MRE-5.0/NOPB | Same PSOP-8 package and 5 V fixed output, but lower 2.5 A current rating and 120 mΩ RDS(ON). | Suitable for <2.5 A loads where thermal margin is less constrained; not recommended for 3 A continuous duty. | Select when load current is consistently ≤2.2 A and cost sensitivity outweighs need for full 3 A headroom. |
| TPS54340DDAR | 42 V, 3.5 A buck with adjustable output; requires external compensation; 2.5 V to 42 V input range. | Better suited for designs needing <5 V outputs or programmable sequencing; lacks integrated bootstrap diode. | Choose when adjustable output or higher peak current (3.5 A) is required, accepting added design complexity and component count. |
Compared with LM22670MRE-5.0/NOPB, LM22676MRE-5.0/NOPB delivers 3 A continuously with lower RDS(ON) and tighter output tolerance; versus TPS54340DDAR, it trades adjustability and peak current for simpler fixed-output implementation and reduced external parts.
Availability
LM22676MRE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, telecom power conversion, and embedded vision systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM22676MRE-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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The LM22676 product line delivers SIMPLE SWITCHER® step-down regulators targeting high-voltage industrial and telecom applications where reliability, ease of design, and thermal performance are critical.
FAQ
What is the maximum input voltage supported by the LM22676MRE-5.0/NOPB?
The LM22676MRE-5.0/NOPB supports a maximum input voltage of 42 V, with absolute maximum rating at 43 V. This enables direct regulation from standard 24 V and 36 V industrial rails, as well as telecom 48 V rectified inputs after derating. Operation above 42 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet.
Does the LM22676MRE-5.0/NOPB require an external feedback resistor network?
No, the LM22676MRE-5.0/NOPB does not require an external feedback resistor network because it integrates a precision 5.0 V reference and internal resistive divider. The FB pin is connected directly to the output capacitor for fixed 5 V operation - eliminating tuning components and improving output accuracy and noise immunity.
Can the LM22676MRE-5.0/NOPB operate with ceramic output capacitors only?
Yes, the LM22676MRE-5.0/NOPB is explicitly designed to be stable with low-ESR ceramic capacitors. The datasheet confirms stability with ≥10 µF X5R/X7R MLCCs at the output, avoiding the need for aluminum or tantalum electrolytics - which improves reliability, lifetime, and temperature performance in demanding environments.
What thermal performance can be expected from the LM22676MRE-5.0/NOPB in PSOP-8 package?
In the PSOP-8 (PFM) package, the LM22676MRE-5.0/NOPB achieves a junction-to-ambient thermal resistance (RθJA) of 22°C/W when the exposed pad is properly soldered to a 1-in² copper pour. At 3 A load and 12 V input, typical power dissipation is ~1.2 W, resulting in ~27°C junction rise above ambient - well within the –40°C to +125°C operating range.
Is the LM22676MRE-5.0/NOPB pin-compatible with other members of the LM2267x family?
The LM22676MRE-5.0/NOPB shares the same PSOP-8 (PFM) pinout with LM22670MRE-5.0/NOPB and LM22671MRE-5.0/NOPB, including identical SW, VIN, BOOT, GND, FB, EN, and NC assignments. However, differences in RDS(ON), current limit, and thermal characteristics mean direct substitution requires validation of thermal and load margins in the target application.
LM22676MRE-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- 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:
- 3A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM22676MRE-5.0/NOPB FAQ
1.How can I place an order for LM22676MRE-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM22676MRE-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 LM22676MRE-5.0/NOPB reliable?
The price and inventory of LM22676MRE-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 LM22676MRE-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM22676MRE-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM22676MRE-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM22676MRE-5.0/NOPB?
LM22676MRE-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM22676MRE-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 LM22676MRE-5.0/NOPB?
For technical support, including LM22676MRE-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM22676MRE-5.0/NOPB requirements.
6.How does Aetrix verify that LM22676MRE-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM22676MRE-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 LM22676MRE-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM22676MRE-5.0/NOPB?
All LM22676MRE-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM22676MRE-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 LM22676MRE-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM22676MRE-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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