Texas Instruments LM22676TJE-5.0/NOPB

Overview

LM22676TJE-5.0/NOPB from Texas Instruments is a 42 V, 3 A synchronous step-down DC/DC regulator in an HSOP-8 PowerPAD package with fixed 5.0 V output, 500 kHz switching frequency, ±1.5% feedback reference accuracy, and integrated bootstrap diode. It delivers high efficiency (>90%) in industrial power rails converting 12 V or 24 V input to stable 5 V for microcontrollers and peripherals.

For engineers reviewing the LM22676TJE-5.0/NOPB datasheet, LM22676TJE-5.0/NOPB pinout, LM22676TJE-5.0/NOPB application, or LM22676TJE-5.0/NOPB equivalent, key selection factors include its 4.5–42 V input range, internal voltage-mode compensation, precision enable threshold (1.6 V typ), thermal shutdown at 150°C, and compatibility with low-ESR ceramic output capacitors.

Technical Context

The LM22676TJE-5.0/NOPB implements a voltage-mode PWM controller with input voltage feedforward to stabilize loop gain across wide VIN variations. Its internal Type III compensation network is optimized for fixed 5 V output, eliminating external compensation components.

It integrates a 120 mΩ N-channel MOSFET switch (HSOP-8 package), bootstrap gate driver with integrated diode, soft-start (500 µs typ), and precision enable with 0.6 V hysteresis. UVLO activates at 4.3 V (rising) and deactivates at 3.9 V (falling), while current limiting protects against overloads up to 5.5 A (max).

Key Specifications

Pinout & Package

LM22676TJE-5.0/NOPB uses the HSOP-8 PowerPAD (DDA) package with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (R_θJA = 60°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Compared with LM22670TJE-5.0/NOPB, the LM22676TJE-5.0/NOPB offers superior 42 V input tolerance and lower R_DS(ON) for improved efficiency at full load; versus TPS54340DDAR, it trades adjustability for plug-and-play simplicity and reduced BOM cost in fixed 5 V applications.

Availability

LM22676TJE-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control, automotive body electronics, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant alternatives.

Supply support for LM22676TJE-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 ICs, with decades of expertise in high-reliability power conversion solutions.

The LM22676 series belongs to TI's SIMPLE SWITCHER® family-designed specifically for easy-to-deploy, high-efficiency DC/DC buck regulators targeting industrial, automotive, and communications applications where minimal external components and rapid design-in are critical.

FAQ

What is the maximum input voltage rating for LM22676TJE-5.0/NOPB?

The LM22676TJE-5.0/NOPB has an absolute maximum input voltage rating of 43 V, with recommended operation from 4.5 V to 42 V. This allows reliable use in 24 V industrial systems and automotive environments subject to load dump transients up to 42 V. Exceeding 43 V risks permanent damage to the internal N-channel MOSFET and control circuitry. The device's UVLO ensures safe startup above 4.3 V and graceful shutdown below 3.9 V.

Does LM22676TJE-5.0/NOPB require an external feedback resistor divider?

No, LM22676TJE-5.0/NOPB does not require an external feedback resistor divider because it is the fixed 5.0 V output variant. The FB pin is internally connected to the 5.0 V reference and must be shorted directly to the output voltage node. In contrast, the LM22676-ADJ version requires an external resistor divider to set the output voltage. Using a divider with the LM22676TJE-5.0/NOPB would disrupt regulation and cause output inaccuracy.

What thermal performance can be expected from LM22676TJE-5.0/NOPB in HSOP-8 PowerPAD package?

In the HSOP-8 PowerPAD (DDA) package, LM22676TJE-5.0/NOPB achieves a junction-to-ambient thermal resistance (R_θJA) of 60°C/W with standard 2-layer PCB layout and 1 in² copper pour under the exposed pad. With proper thermal vias to inner ground planes, R_θJA improves to ~40°C/W. At 3 A load and 12 V input, typical power dissipation is ~360 mW, resulting in ~22°C junction rise above ambient-well within the –40°C to 125°C operating range.

Can LM22676TJE-5.0/NOPB operate with ceramic output capacitors only?

Yes, LM22676TJE-5.0/NOPB is explicitly designed and characterized to be stable with low-ESR ceramic output capacitors-no electrolytic or tantalum capacitors are required. TI specifies stability with 22 µF to 100 µF X5R/X7R ceramics (e.g., 47 µF, 10 V). This eliminates aging, leakage, and temperature drift issues associated with wet electrolytics, enhancing long-term reliability in industrial and medical applications.

What is the purpose of the NC pins on LM22676TJE-5.0/NOPB?

The two NC (No Connect) pins on LM22676TJE-5.0/NOPB (pins 7 and 8 in HSOP-8 top view) serve solely as thermal conductors tied to the exposed PowerPAD. They are not electrically connected to any internal circuitry. These pins must be soldered to the PCB ground plane to maximize heat transfer-never routed to signal traces or left floating. Their presence improves thermal performance without adding functional complexity.