Inicio Gestión de la energía AC/DC & DC/DC converters (integrated FET)
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Gestión de la energía
AC/DC & DC/DC converters (integrated FET)

LM2841

ACTIVO

Convertidor reductor SIMPLE SWITCHER® de 300 mA y 4.5 V a 42 V en SOT-23 delgado

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LMR54406 ACTIVO Convertidor de potencia SIMPLE SWITCHER® con entrada de 4 V a 36 V, 0.6 A, síncrono reductor e IQ de Smaller footprint, lower quiescent current, FPWM and PFM options.

LM2841

ACTIVO
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Detalles del producto

Iout (max) (A) 0.3 Vin (min) (V) 4.5 Vin (max) (V) 42 Topology Buck Type Converter Switching frequency (min) (kHz) 950 Switching frequency (max) (kHz) 1500 Features Enable, Over Current Protection Control mode current mode Vout (min) (V) 0.765 Vout (max) (V) 34 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0013
Iout (max) (A) 0.3 Vin (min) (V) 4.5 Vin (max) (V) 42 Topology Buck Type Converter Switching frequency (min) (kHz) 950 Switching frequency (max) (kHz) 1500 Features Enable, Over Current Protection Control mode current mode Vout (min) (V) 0.765 Vout (max) (V) 34 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0013
SOT-23-THN (DDC) 6 8.12 mm² 2.9 x 2.8
  • Input voltage 4.5 V to 42 V
  • Output current options of 100 mA, 300 mA, and 600 mA
  • Feedback pin voltage of 0.765 V
  • 550-kHz (X) or 1.25-MHz (Y) switching frequency
  • Low shutdown IQ: 16-µA typical
  • Short-circuit protected
  • Internally compensated
  • Soft-start circuitry
  • Small overall solution size (SOT-6L package)
  • Create a custom design using the LM2840 (or LM2841/42) with the WEBENCH® Power Designer
  • Input voltage 4.5 V to 42 V
  • Output current options of 100 mA, 300 mA, and 600 mA
  • Feedback pin voltage of 0.765 V
  • 550-kHz (X) or 1.25-MHz (Y) switching frequency
  • Low shutdown IQ: 16-µA typical
  • Short-circuit protected
  • Internally compensated
  • Soft-start circuitry
  • Small overall solution size (SOT-6L package)
  • Create a custom design using the LM2840 (or LM2841/42) with the WEBENCH® Power Designer

The LM284x SIMPLE SWITCHER™ devices are PWM DC/DC buck (step-down) regulators. With an input range from 4.5 V to 42 V, they are suitable for a wide range of applications, such as power conditioning from unregulated sources. They feature a low RDSON (0.9‑Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 550 kHz (X option) and 1.25 MHz (Y option), allowing the use of small external components while still being able to have low output voltage ripple. Soft start can be implemented using the shutdown (SHDN) pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.

The LM2840 is optimized for up to 100 mA, the LM2841 for up to 300 mA, and the LM2842 for up to 600‑mA load currents. They all have a 0.765-V nominal feedback voltage.

Additional features include: thermal shutdown, VIN undervoltage lockout, and gate-drive undervoltage lockout. The LM284x are available in a low-profile SOT-6L package.

The LM284x SIMPLE SWITCHER™ devices are PWM DC/DC buck (step-down) regulators. With an input range from 4.5 V to 42 V, they are suitable for a wide range of applications, such as power conditioning from unregulated sources. They feature a low RDSON (0.9‑Ω typical) internal switch for maximum efficiency (85% typical). Operating frequency is fixed at 550 kHz (X option) and 1.25 MHz (Y option), allowing the use of small external components while still being able to have low output voltage ripple. Soft start can be implemented using the shutdown (SHDN) pin with an external RC circuit allowing the user to tailor the soft-start time to a specific application.

The LM2840 is optimized for up to 100 mA, the LM2841 for up to 300 mA, and the LM2842 for up to 600‑mA load currents. They all have a 0.765-V nominal feedback voltage.

Additional features include: thermal shutdown, VIN undervoltage lockout, and gate-drive undervoltage lockout. The LM284x are available in a low-profile SOT-6L package.
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LMR14203 ACTIVO Regulador de conmutación CC/CC reductor de 4,5 V a 42 V, 0,3 A en SOT-23 Next-generation 4.5-V to 42-V, 300-mA SIMPLE SWITCHER buck converter for cost-optimized solution.

Documentación técnica

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* Data sheet LM284x SIMPLE SWITCHER® 4.5-V to 42-V Input, 0.1-, 0.3-, or 0.6-A Output Step-Down DC/DC Regulator in Thin SOT datasheet (Rev. K) PDF | HTML 09 abr 2019
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25 mar 2024
Technical article Quantifying the value of wide VIN PDF | HTML 15 jun 2016
Technical article DC/DC converter datasheets – System losses demystified PDF | HTML 25 abr 2016
Technical article DC/DC converter datasheets – System efficiency demystified PDF | HTML 18 abr 2016
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12 sep 2014
EVM User's guide AN-1876 LM2841 Evaluation Board (Rev. C) 25 abr 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 abr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 abr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 abr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 abr 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23 abr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 abr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 abr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 abr 2013
Application note AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) 23 abr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 abr 2013
Application note Input and Output Capacitor Selection 19 sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 may 2004

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LM2841YMK-ADJEV — Placa de evaluación para LM2841

The LM2841 evaluation board is designed to provide the design engineer with a fully functional power converter based on the buck topology to evaluate the LM2841 series of buck regulators. The evaluation board comes populated with the LM2841YMK-ADJL but can easily be modified to accommodate any of (...)

Guía del usuario: PDF
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Modelo de simulación

LM2841X PSpice Average Model

SNVM225.ZIP (53 KB) - PSpice Model
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Modelo de simulación

LM2841X PSpice Transient Model

SNVM224.ZIP (182 KB) - PSpice Model
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Modelo de simulación

LM2841X TINA-TI Reference Design

SNVMAW7.TSC (283 KB) - TINA-TI Reference Design
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Modelo de simulación

LM2841X Unencrypted PSpice Average Model

SNVM858.ZIP (1 KB) - PSpice Model
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Modelo de simulación

LM2841X Unencrypted PSpice Transient Model

SNVM859.ZIP (2 KB) - PSpice Model
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Modelo de simulación

LM2841Y PSpice Average Model

SNVM303.ZIP (52 KB) - PSpice Model
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Modelo de simulación

LM2841Y PSpice Transient Model

SNVM304.ZIP (190 KB) - PSpice Model
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Modelo de simulación

LM2841Y TINA-TI Reference Design

SNVMAW6.TSC (282 KB) - TINA-TI Reference Design
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Modelo de simulación

LM2841Y Unencrypted PSpice Average Model

SNVM857.ZIP (1 KB) - PSpice Model
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Modelo de simulación

LM2841Y Unencrypted PSpice Transient Model

SNVM856.ZIP (2 KB) - PSpice Model
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Diseños de referencia

PMP7233 — Diseño de referencia de simulador de arranque para aplicaciones de automoción

This design is a cranking simulator which generates three different cranking pulses to test automotive systems up to 50W. A microcontroller sets the output voltage of a synchronous buck in the range of 2-15V accordingly to the programmed curves. Output current is in the range of 3.3-25A. It is a (...)
Test report: PDF
Esquema: PDF
Paquete Pasadores Descargar
SOT-23-THN (DDC) 6 Ver opciones
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Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

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