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LM3743

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LM3743

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Detalles del producto

Rating Catalog Iout (max) (A) 10 Vin (max) (V) 5.5 Vin (min) (V) 3 Vout (max) (V) 4.6 Vout (min) (V) 0.8 Control mode Voltage mode Features Enable pin, Prebias startup, Tracking Duty cycle (max) (%) 91 Iq (typ) (A) 0.0018 Number of phases 1 Operating temperature range (°C) -40 to 125
Rating Catalog Iout (max) (A) 10 Vin (max) (V) 5.5 Vin (min) (V) 3 Vout (max) (V) 4.6 Vout (min) (V) 0.8 Control mode Voltage mode Features Enable pin, Prebias startup, Tracking Duty cycle (max) (%) 91 Iq (typ) (A) 0.0018 Number of phases 1 Operating temperature range (°C) -40 to 125
VSSOP (DGS) 10 14.7 mm² (3 mm × 4.9 mm)
  • Input Voltage From 3.0V to 5.5V
  • Output Voltage Adjustable Down to 0.8V
  • Reference Accuracy: ±1.75%, over Full Temperature and Input Voltage Range
  • High-Side and Low-Side N-Channel MOSFETs
  • Switching Frequency Options of 1 MHz or 300 kHz
  • Comprehensive Fault Protection Features:
    • High-Side Current Limit
    • Low-Side Current Limit
    • Output Under-Voltage Protection
  • Hiccup Mode Protection Eliminates Thermal Runaway During Fault Conditions
  • Externally Programmable Soft-Start with Tracking Capability
  • Pre-Bias Start-Up Capability
  • VSSOP-10 Package

All trademarks are the property of their respective owners.

  • Input Voltage From 3.0V to 5.5V
  • Output Voltage Adjustable Down to 0.8V
  • Reference Accuracy: ±1.75%, over Full Temperature and Input Voltage Range
  • High-Side and Low-Side N-Channel MOSFETs
  • Switching Frequency Options of 1 MHz or 300 kHz
  • Comprehensive Fault Protection Features:
    • High-Side Current Limit
    • Low-Side Current Limit
    • Output Under-Voltage Protection
  • Hiccup Mode Protection Eliminates Thermal Runaway During Fault Conditions
  • Externally Programmable Soft-Start with Tracking Capability
  • Pre-Bias Start-Up Capability
  • VSSOP-10 Package

All trademarks are the property of their respective owners.

The LM3743 is a DC-DC voltage mode PWM buck controller featuring synchronous rectification at 300 kHz or 1 MHz. It can deliver current as high as 20A and step down from an input voltage between 3V and 5.5V down to a minimum output voltage of 0.8V, with a ±1.75% internal reference accuracy. The LM3743 provides a set of comprehensive fault protection features such as high-side current limit, output under-voltage protection, and low-side current limit. When any of these fault protection features are engaged, it enters a hiccup protection mode which is suitable for high reliability systems such as rack mounted servers and telecom base station subsystems. The LM3743 also employs a proprietary monolithic glitch free pre-bias start-up method suited for FPGA and ASIC logic devices. An external programmable soft-start allows for tracking and timing flexibility. The driver features 1.6Ω of pull-up resistance and 1Ω of pull-down drive resistance for high power density and very efficient power processing.

The LM3743 is a DC-DC voltage mode PWM buck controller featuring synchronous rectification at 300 kHz or 1 MHz. It can deliver current as high as 20A and step down from an input voltage between 3V and 5.5V down to a minimum output voltage of 0.8V, with a ±1.75% internal reference accuracy. The LM3743 provides a set of comprehensive fault protection features such as high-side current limit, output under-voltage protection, and low-side current limit. When any of these fault protection features are engaged, it enters a hiccup protection mode which is suitable for high reliability systems such as rack mounted servers and telecom base station subsystems. The LM3743 also employs a proprietary monolithic glitch free pre-bias start-up method suited for FPGA and ASIC logic devices. An external programmable soft-start allows for tracking and timing flexibility. The driver features 1.6Ω of pull-up resistance and 1Ω of pull-down drive resistance for high power density and very efficient power processing.
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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 LM3743 High-Perf Synch Buck Cntrler w/Compreh Fault Protect Features datasheet (Rev. E) 4/04/2013
Guía de selección Power Management Guide 2018 (Rev. R) 25/06/2018
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 21/07/2016
Nota sobre la aplicación LM3743 Hi Perf Controller w/Comp Fault Protect Feature for Hi Reliability System (Rev. A) 6/05/2013
Nota sobre la aplicación Power Supply Design Considerations for Modern FPGAs (Power Designer 121) 2/02/2010

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