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LM2641

不推荐用于新设计

具有 LDO 的 5.5V 至 30V 输入电压、300kHz 同步 DCAP2 模式双路降压控制器

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LM2641 不推荐用于新设计
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功能与比较器件相似
TPS56837 正在供货 4.5V 至 28V 输入、8A 同步降压转换器 Higher power density integrated FET converter solution for up to 8A output current

LM2641

不推荐用于新设计
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产品详情

Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 30 Vin (min) (V) 5.5 Vout (max) (V) 6 Vout (min) (V) 2.2 Control mode current mode Features Enable, Frequency synchronization, Light-load efficiency, Power good Operating temperature range (°C) 0 to 0 Iq (typ) (µA) 600 Duty cycle (max) (%) 98 Number of phases 1
Rating Catalog Topology Buck Iout (max) (A) 5 Vin (max) (V) 30 Vin (min) (V) 5.5 Vout (max) (V) 6 Vout (min) (V) 2.2 Control mode current mode Features Enable, Frequency synchronization, Light-load efficiency, Power good Operating temperature range (°C) 0 to 0 Iq (typ) (µA) 600 Duty cycle (max) (%) 98 Number of phases 1
TSSOP (PW) 28 62.08 mm² 9.7 x 6.4
  • 300 kHz Fixed-Frequency Switching
  • Switching Synchronization with an External Signal up to 400 kHz
  • Optional Pulse-Skipping Mode
  • Adjustable Secondary Feedback
  • Input Undervoltage Lockout
  • Output Undervoltage Shutdown Protection
  • Output Overvoltage Shutdown Protection
  • Programmable Soft-Start (Each Controller)
  • 5V, 50 mA Linear Regulator Output
  • Precision 2.5V Reference Output
  • 28-pin TSSOP

Key Specifications

  • 96 % Efficient
  • 5.5 – 30 V Input Range
  • Dual Outputs Adjustable from 2.2 – 8 V
  • 0.5 % Typical Load Regulation Error
  • 0.002 %/V Typical Line Regulation Error

All trademarks are the property of their respective owners.

  • 300 kHz Fixed-Frequency Switching
  • Switching Synchronization with an External Signal up to 400 kHz
  • Optional Pulse-Skipping Mode
  • Adjustable Secondary Feedback
  • Input Undervoltage Lockout
  • Output Undervoltage Shutdown Protection
  • Output Overvoltage Shutdown Protection
  • Programmable Soft-Start (Each Controller)
  • 5V, 50 mA Linear Regulator Output
  • Precision 2.5V Reference Output
  • 28-pin TSSOP

Key Specifications

  • 96 % Efficient
  • 5.5 – 30 V Input Range
  • Dual Outputs Adjustable from 2.2 – 8 V
  • 0.5 % Typical Load Regulation Error
  • 0.002 %/V Typical Line Regulation Error

All trademarks are the property of their respective owners.

The LM2641 is a dual step-down power supply controller intended for application in notebook personal computers and other battery-powered equipment.

Fixed-frequency synchronous drive of logic-level N-channel power MOSFETs is combined with an optional pulse-skipping mode to achieve ultra efficient power conversion over a 1000:1 load current range. The pulse-skipping mode can be disabled in favor of fixed-frequency operation regardless of the load current level.

High DC gain and current-mode feedback control assure excellent line and load regulation and a wide loop bandwidth for fast response to dynamic loads.

An internal oscillator fixes the switching frequency at 300 kHz. Optionally, switching can be synchronized to an external clock running as fast as 400 kHz.

An optional soft-start feature limits current surges from the input power supply at start up and provides a simple means of start-up sequencing.

Logic-level inputs allow the controllers to be turned ON and OFF separately.

The LM2641 is a dual step-down power supply controller intended for application in notebook personal computers and other battery-powered equipment.

Fixed-frequency synchronous drive of logic-level N-channel power MOSFETs is combined with an optional pulse-skipping mode to achieve ultra efficient power conversion over a 1000:1 load current range. The pulse-skipping mode can be disabled in favor of fixed-frequency operation regardless of the load current level.

High DC gain and current-mode feedback control assure excellent line and load regulation and a wide loop bandwidth for fast response to dynamic loads.

An internal oscillator fixes the switching frequency at 300 kHz. Optionally, switching can be synchronized to an external clock running as fast as 400 kHz.

An optional soft-start feature limits current surges from the input power supply at start up and provides a simple means of start-up sequencing.

Logic-level inputs allow the controllers to be turned ON and OFF separately.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM2641 Dual Adjustable Step-Down Switching Power Supply Controller 数据表 (Rev. B) 2013年 4月 3日

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点