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LM2672MX-3.3

Name: LM2672MX-3.3
Rating: 4.7 (12 reviews)

IC REG BUCK 3.3V 1A 8SOIC

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Mfr。パート #LM2672MX-3.3
パッケージ SOIC-8
データシート
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仕様

Package	Tape & Reel (TR)
Series	SIMPLE SWITCHER®
ProductStatus	Obsolete
Function	Step-Down
OutputConfiguration	Positive
Topology	Buck
OutputType	Fixed
NumberofOutputs	1
Voltage-Input(Min)	6.5V
Voltage-Input(Max)	40V
Voltage-Output(Min/Fixed)	3.3V
Current-Output	1A
Frequency-Switching	260kHz
SynchronousRectifier	No
OperatingTemperature	-40°C ~ 125°C (TJ)
MountingType	Surface Mount
Package/Case	8-SOIC (0.154, 3.90mm Width)

概要

Description

LM2672MX-3.3 is a fixed‑output 3.3V buck regulator in TI’s LM2672 family. It is a high‑efficiency, 2‑A switch‑mode regulator with input up to 40 V, designed to generate a stable 3.3 V rail from higher voltages.
Key points
- Fixed 3.3 V output; no external feedback divider required.
- 2 A switch current capability; current‑mode control with internal switch, protection features (thermal shutdown and current limit).
- Switching frequency about 260 kHz.
- Requires external components: inductor, Schottky catch diode, input and output capacitors (low‑ESR).
- Packages in the MX family (surface‑mount).
Design notes
- Place input cap near VIN pin, and keep the catch diode and output cap close to the regulator.
- Selection of inductor and diode follows TI’s recommended values in the datasheet for your Vin and load.
Applications
- Converting higher‑voltage rails (up to 40 V) to 3.3 V in automotive, telecom, and embedded systems.
For exact pinout, package details, BOM, and recommended circuit, consult the LM2672MX-3.3 datasheet.

Features

Key features of LM2672MX-3.3 (3.3V fixed output):
- 3 A fixed-output buck regulator with internal switch
- Input voltage range up to about 40 V
- Fixed 3.3 V output with PWM control for stable regulation
- High efficiency (typical high-efficiency operation across load/ Vin ranges)
- Internal protection: current limit and thermal/shutdown protection
- Soft-start to limit inrush and prevent overshoot
- External components required: inductor, Schottky catch diode, input/output capacitors
- 8-pin MX package (surface-mount)
- Wide operating temperature, typically -40°C to +125°C
Notes: Designed for simple, compact BOM and easy integration in buck-converter designs.

Package

The LM2672MX-3.3 is supplied in a 5-pin D2PAK (TO-263-5) surface-mount power package (SMD).

Pinout

The LM2672MX-3.3 is supplied in an 8-pin surface‑mount package (SO‑8 style, “MX”) with an exposed thermal pad. Key pin functions are:
- VIN: regulator input supply.
- GND: circuit ground (also connected to exposed pad/thermal pad).
- SW: internal power switch output (connects to inductor).
- FB: feedback input (senses output for regulation; fixed‑output parts use internal divider).
- ON/OFF: shutdown/enable control (logic input to enable or disable switching).
- Remaining pins: package ground/NC/connection for internal circuitry/thermal pad per datasheet.
For exact pin numbering and pad connections consult the LM2672 datasheet and the MX package drawing.

Manufacturer

Manufacturer: Texas Instruments (TI).
Type of company: American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits and other semiconductor products.

Application

LM2672MX-3.3 is a fixed 3.3V buck regulator (input 4–40V). Common applications:
- 3.3V rail generation for embedded systems, microprocessors, FPGAs, and ASICs
- Point-of-load (POL) supplies in servers, telecom, and networking gear
- Automotive and industrial power supplies from vehicle/industrial batteries
- Battery-powered and portable electronics
- Any space-constrained DC-DC conversion needing a simple, efficient 3.3V regulator

Equivalent

Direct one-to-one equivalents for LM2672MX-3.3 don’t exist; it’s TI’s 2A, 40V fixed-3.3V buck in MSOP-8. Closest equivalents: Analog Devices ADP2302/ADP2303, Monolithic Power MP1584EN; TI LM2672 family variants in other packages (LM2672-3.3, LM2672M-3.3). For exact cross-reference, check TI’s cross-reference database.