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LM34919B

ACTIVO

Regulador reductor no síncrono de tiempo de conexión constante, con entrada de tensión amplia de 6-4

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Detalles del producto

Rating Catalog Topology Buck Iout (max) (A) 0.6 Vin (max) (V) 40 Vin (min) (V) 6 Vout (max) (V) 35 Vout (min) (V) 2.5 Features Enable, Overcurrent protection Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00078 Duty cycle (max) (%) 99
Rating Catalog Topology Buck Iout (max) (A) 0.6 Vin (max) (V) 40 Vin (min) (V) 6 Vout (max) (V) 35 Vout (min) (V) 2.5 Features Enable, Overcurrent protection Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00078 Duty cycle (max) (%) 99
DSBGA (YPA) 10 3.9375 mm² (— mm × — mm)
  • AEC-Q100 Grade 1 Qualified
    (–40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
    (VIN=14V,Vo=3.3V)
  • Input Voltage Range: 6V to 40V
  • Integrated N-Channel Buck Switch
  • Integrated Startup Regulator
  • No loop compensation Required
  • Ultra-Fast transient Response
  • Operating frequency remains constant
    with Load Current and Input Voltage
  • Maximum Duty Cycle Limited During Startup
  • Adjustable Output Voltage
  • Valley Current Limit At 0.64A
  • Precision Internal Reference
  • Low Bias Current
  • Highly Efficient Operation
  • Thermal Shutdown
  • 10-Pin DSBGA Package
  • AEC-Q100 Grade 1 Qualified
    (–40°C to 125°C)
  • Maximum Switching Frequency: 2.6 MHz
    (VIN=14V,Vo=3.3V)
  • Input Voltage Range: 6V to 40V
  • Integrated N-Channel Buck Switch
  • Integrated Startup Regulator
  • No loop compensation Required
  • Ultra-Fast transient Response
  • Operating frequency remains constant
    with Load Current and Input Voltage
  • Maximum Duty Cycle Limited During Startup
  • Adjustable Output Voltage
  • Valley Current Limit At 0.64A
  • Precision Internal Reference
  • Low Bias Current
  • Highly Efficient Operation
  • Thermal Shutdown
  • 10-Pin DSBGA Package

The LM34919B Step-Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 0.6A to the load. This buck regulator contains an N-Channel Buck Switch, and is available in a 10-pin DSBGA package. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

The LM34919B Step-Down Switching Regulator features all of the functions needed to implement a low cost, efficient, buck bias regulator capable of supplying 0.6A to the load. This buck regulator contains an N-Channel Buck Switch, and is available in a 10-pin DSBGA package. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM34919B Ultra Small 40V, 600 mA Constant On-Time Buck Switching Regulator datasheet (Rev. B) 2/07/2013
Guía de selección Power Management Guide 2018 (Rev. R) 25/06/2018

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

LM34919BEVAL — Módulo de evaluación de regulador de conmutación de tiempo de conexión constante y entrada de tensió

The LM34919BEVAL evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 3.3V output over an input range of 6V to 24V. The circuit delivers load currents to 600 mA, with current (...)

Guía del usuario: PDF
Productos y hardware compatibles
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Herramienta de cálculo

LM34919BQUICK-CALC — Calculadora de inicio rápido LM34919B

Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
DSBGA (YPA) 10 Ultra Librarian

Pedidos y calidad

Soporte y capacitación

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