規格
| 屬性 | 價值 |
| 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) |
概述
Description
LM2672MX-3.3 is a fixed-output buck regulator from TI’s LM2672 Simple Switcher family. It integrates a high‑current switch (≈3 A) and uses current‑mode PWM for efficient step‑down. The MX‑3.3 variant provides a fixed 3.3 V output with a wide input range.
Key specs (typical): input 4–40 V, fixed 3.3 V output, high efficiency (layout dependent), and built‑in protection (current limit, thermal shutdown, UVLO). No external feedback resistors are needed for the fixed output.
External components you must provide: an inductor, a Schottky catch diode, and input/output capacitors (prefer low‑ESR types). Package options are 8‑pin (SOP/MSOP) in the MX family; check the datasheet for exact package and pinout.
Design notes: keep the loop short, manage heat dissipation, and choose inductor and diode per the datasheet’s recommendations to meet ripple and load requirements.
Applications: automotive, industrial, and other distributed power needs. For precise pinout, package, and recommended component values, refer to the LM2672MX‑3.3 datasheet.
Key specs (typical): input 4–40 V, fixed 3.3 V output, high efficiency (layout dependent), and built‑in protection (current limit, thermal shutdown, UVLO). No external feedback resistors are needed for the fixed output.
External components you must provide: an inductor, a Schottky catch diode, and input/output capacitors (prefer low‑ESR types). Package options are 8‑pin (SOP/MSOP) in the MX family; check the datasheet for exact package and pinout.
Design notes: keep the loop short, manage heat dissipation, and choose inductor and diode per the datasheet’s recommendations to meet ripple and load requirements.
Applications: automotive, industrial, and other distributed power needs. For precise pinout, package, and recommended component values, refer to the LM2672MX‑3.3 datasheet.
Features
Key features of LM2672MX-3.3 (3.3 V fixed output):
- 3 A switch current capability
- Fixed 3.3 V output version (LM2672MX-3.3)
- Wide input range: roughly 4–40 V
- Fixed-frequency, current‑mode PWM step-down regulator
- High efficiency with low quiescent current
- Internal current limit and thermal shutdown protections
- Minimal external parts: inductor, Schottky catch diode, input/output capacitors (no external feedback network for fixed output)
- Small 8-pin MSOP package (MX)
- Suitable for automotive/industrial environments and compact designs
- 3 A switch current capability
- Fixed 3.3 V output version (LM2672MX-3.3)
- Wide input range: roughly 4–40 V
- Fixed-frequency, current‑mode PWM step-down regulator
- High efficiency with low quiescent current
- Internal current limit and thermal shutdown protections
- Minimal external parts: inductor, Schottky catch diode, input/output capacitors (no external feedback network for fixed output)
- Small 8-pin MSOP package (MX)
- Suitable for automotive/industrial environments and compact designs
Pinout
- Pin count: 8 pins (MSOP-8/SO-8 variant)
- Function: Fixed 3.3 V, high-efficiency buck regulator (up to about 3 A switch current; input up to ~40 V). Requires external inductor, catch diode, and input/output capacitors. Pin roles (typical): VIN (power input), GND, SW (switch node to inductor/diode), FB (feedback), EN (enable/shutdown), BYP (bypass capacitor for ripple reduction), plus two NC (not connected) pins.
- Function: Fixed 3.3 V, high-efficiency buck regulator (up to about 3 A switch current; input up to ~40 V). Requires external inductor, catch diode, and input/output capacitors. Pin roles (typical): VIN (power input), GND, SW (switch node to inductor/diode), FB (feedback), EN (enable/shutdown), BYP (bypass capacitor for ripple reduction), plus two NC (not connected) pins.
Manufacturer
Manufacturer: Texas Instruments (TI).
What kind of company: A US-based multinational semiconductor company that designs and manufactures analog and embedded-processing integrated circuits.
What kind of company: A US-based multinational semiconductor company that designs and manufactures analog and embedded-processing integrated circuits.
Application
LM2672MX-3.3 is a fixed 3.3V buck regulator. Typical application areas:
- Step-down supplies from 4.5–40V to a 3.3V rail for embedded MCUs, DSPs, and FPGAs.
- Automotive/industrial equipment needing a compact 3.3V regulator from 12–24V systems.
- Telecom/network gear (routers, switches) requiring efficient, space-saving 3.3V power.
- Point-of-load regulators in instrumentation, data acquisition, and portable gear.
- Consumer electronics where high efficiency and small footprint 3.3V regulation is advantageous.
Note: external inductor, diode, and capacitors required; consult datasheet for design.
- Step-down supplies from 4.5–40V to a 3.3V rail for embedded MCUs, DSPs, and FPGAs.
- Automotive/industrial equipment needing a compact 3.3V regulator from 12–24V systems.
- Telecom/network gear (routers, switches) requiring efficient, space-saving 3.3V power.
- Point-of-load regulators in instrumentation, data acquisition, and portable gear.
- Consumer electronics where high efficiency and small footprint 3.3V regulation is advantageous.
Note: external inductor, diode, and capacitors required; consult datasheet for design.
Package
MSOP-8 package (8-pin, small-outline ~3×3 mm).
