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LM2675MX-3.3

1A buck, 6.5-40V in, fixed 3.3V out, 150kHz, SOIC-8

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Pieza del fabricante：

LM2675MX-3.3

Paquete：

SOIC-8 (4.9×3.9×1.5 mm, 1.27mm pitch)

Marca：
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Compromiso de calidad
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Descripción

Productos

The LM2675MX-3.3 from Texas Instruments is a 1A step-down voltage regulator from the SIMPLE SWITCHER family, providing a fixed 3.3V output from up to 40V input. With 150 kHz fixed switching frequency and integrated high-side MOSFET, it simplifies 3.3V rail generation from 5V, 12V, or 24V sources with minimal external components in an SOIC-8 package.

Especificaciones

Topology Buck (Step-Down)
Input Voltage Range 6.5V to 40V
Output Voltage 3.3V (fixed)
Corriente de salida 1A
Switching Frequency 150 kHz (fixed)
Efficiency Up to 88%
Output Voltage Accuracy ±2%
Corriente de reposo 2.5 mA (typical)
Shutdown Current 50 µA (typical)
Temperatura de funcionamiento -40°C to +125°C (junction)
Paquete SOIC-8 (3.9mm width)

Características

  • Fixed 3.3V output with ±2% accuracy
  • SIMPLE SWITCHER: minimal external components
  • 6.5V to 40V input range
  • 1A output current with integrated MOSFET
  • 150 kHz switching frequency
  • Internal soft-start and thermal shutdown
  • Available in 3.3V, 5V, 12V, and adjustable versions

Aplicaciones

  • 12V/24V to 3.3V step-down for MCU power
  • Industrial 24V bus to 3.3V point-of-load
  • Automative 12V to 3.3V logic supply
  • Distributed power system 3.3V rail
  • Battery-powered 3.3V supply generation

The LM2675MX-3.3 from Texas Instruments is a 1A SIMPLE SWITCHER step-down regulator providing fixed 3.3V output from 6.5V to 40V input. With 150 kHz switching, integrated MOSFET, and minimal external components, it is the simplest way to generate a 3.3V logic supply from 12V or 24V sources in automotive, industrial, and embedded systems.

The LM2675MX-3.3 uses fixed-frequency current-mode PWM control. The internal 150 kHz oscillator sets the switching frequency. The error amplifier compares an internal 3.3V reference with the output voltage (FB pin connected directly to output for the fixed-voltage version). The PWM comparator modulates the duty cycle of the integrated high-side NPN Darlington switch. During on-time, energy is stored in the external inductor. During off-time, the external Schottky catch diode provides a current path for the inductor. Current-mode control provides inherent cycle-by-cycle current limiting and fast line/load transient response. The internal soft-start prevents excessive inrush current at startup.

Pin Nombre Tipo Función
1 CB E/S Bootstrap capacitor (connect 0.01µF to SW)
2 FB Entrada Feedback (connect to output for fixed voltage version)
3 ON/OFF Entrada Shutdown control (float to enable, pull LOW to disable)
4 GND Potencia Suelo
5 VIN Potencia Input supply (6.5-40V)
6 SW Salida Switch output (connect to inductor and catch diode)
7 NC — Sin conexión
8 NC — Sin conexión
  • 12V/24V to 3.3V step-down conversion for MCU and logic power
  • Industrial 24V bus to 3.3V point-of-load regulation
  • Automotive 12V battery to 3.3V logic supply
  • Distributed power system 3.3V secondary rail
  • Battery-powered 3.3V supply from 9V or 12V source
Fabricante Número de pieza Paquete Notas
TI LM2675MX-5.0 SOIC-8 Fixed 5V output version
TI LM2675MX-12 SOIC-8 Fixed 12V output version
TI LM2675MX-ADJ SOIC-8 Adjustable output version
TI LM2841XMK-3.3 SOT-23-6 100mA, 42V, smaller package
Richtek RT8258GQW WDFN-10 4.5-36V, 2A, 340kHz
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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