Mfr Part #:

LM2678SX-ADJ/NOPB

The Texas Instruments LM2678SX-ADJ/NOPB is an adjustable 5A buck converter. It operates with an input voltage range of 8V to 40V and features a 260kHz switching frequency.

✓ Total Stock: 10,020 pcs

$ Price Range: $3.27

LM2678SX-ADJ/NOPB Available from 5 distributors

✓ Authorised

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Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Fe Components ✓ Non-Authorised Inventory information	5,042 pcs On Request	5042 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Components Technology Group, Inc. ✓ Non-Authorised Inventory information	2,500 pcs On Request	2500 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Xingangxin ✓ Non-Authorised Inventory information	1,718 pcs On Request	1718 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request
Smaxon Electronics ✓ Non-Authorised Inventory information	646 pcs On Request	646 pcs	On Request	1	On Request	On Request	1340+	On Request	On Request
PROSOFT ELECTRONICS ✓ Non-Authorised Inventory information	114 pcs On Request	114 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

LM2678SX-ADJ/NOPB Description

Short technical summary and product information.

The LM2678SX-ADJ/NOPB from Texas Instruments is a monolithic integrated circuit designed as a step-down (buck) switching regulator. It is capable of driving loads up to 5A and offers excellent line and load regulation. This regulator achieves high efficiency, up to 92%, through its low ON-resistance DMOS output switch.

Key electrical specifications include a wide input voltage range from 8V to 40V and an adjustable output voltage from 1.2V to 37V. It operates at a fixed frequency of 260kHz and has a standby current of 50µA when switched off. The output tolerance is within ±2% over the full line and load conditions.

This component is housed in a TO-263-7 surface mount package. The operating junction temperature range is -40°C to 125°C. Its design is simplified by the use of off-the-shelf external components, making it easier for engineers to implement in various power supply designs.

LM2678SX-ADJ/NOPB Quick Information

Product Type: Buck Converter

Series: LM2678

Canonical Name: LM2678SX-ADJ/NOPB Adjustable 5A Buck Converter

Subcategory: Buck Converter

LM2678SX-ADJ/NOPB Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

LM2678SX-ADJ/NOPB Estimated Pricing

Qty	Low	High
1+	$3.27	$3.27

Estimated market price range - modelled values for guidance only, not live distributor offers.

LM2678SX-ADJ/NOPB Features

Adjustable 5A buck converter.
Wide 8V to 40V input voltage range.
High efficiency up to 92%.
260kHz fixed frequency oscillator.
TO-263-7 surface mount package.

LM2678SX-ADJ/NOPB Applications

Used in point-of-load power supplies.
Suitable for distributed power architectures.
Ideal for battery-powered equipment.
Applicable in industrial control systems.

LM2678SX-ADJ/NOPB FAQs

7 frequently asked questions generated from this part’s specifications.

What is the input voltage range of the LM2678SX-ADJ/NOPB?

8V to 40V.

What package does the LM2678SX-ADJ/NOPB come in?

Surface-mount TO-263-8 (D²Pak) with 7 leads plus tab.

What is the operating temperature range?

-40°C to 125°C (junction).

What is the output current rating?

5A.

What is the switching frequency?

260kHz.

What is the maximum efficiency?

Up to 92%.

What is the standby current when switched off?

50µA.

Category	Voltage Regulators - DC DC Switching Regulators
Manufacturer Name	Texas Instruments
Current	5A
Efficiency	92%
Frequency	260kHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature	-40°C ~ 125°C (TJ)
Output Configuration	Positive
Output Type	Adjustable
Package Quantity	500
Supplier Device Package	DDPAK/TO-263-7
Supplier Package	DDPAK/TO-263-7
Synchronous Rectifier	No
Topology	Buck
Voltage	8V