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LM2640

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具有 LDO 的 5.5V 至 30V、200kHz 同步 D-CAP2 模式双路降压控制器

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数据表

LM2640

正在供货
数据表 立即订购

产品详情

Vin (min) (V) 5.5 Vin (max) (V) 30 Iout (max) (A) 5 Operating temperature range (°C) 0 to 125 Control mode D-CAP2, current mode Topology Buck Rating Catalog Vout (min) (V) 2.2 Vout (max) (V) 6 Features Enable, Frequency synchronization, Light Load Efficiency Iq (typ) (µA) 600 Duty cycle (max) (%) 98 Number of phases 2
Vin (min) (V) 5.5 Vin (max) (V) 30 Iout (max) (A) 5 Operating temperature range (°C) 0 to 125 Control mode D-CAP2, current mode Topology Buck Rating Catalog Vout (min) (V) 2.2 Vout (max) (V) 6 Features Enable, Frequency synchronization, Light Load Efficiency Iq (typ) (µA) 600 Duty cycle (max) (%) 98 Number of phases 2
TSSOP (PW) 28 62.08 mm² 9.7 x 6.4
  • 200 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 Package

Key Specifications

  • 96% Efficient
  • 5.5V to 30V Input Range
  • Dual Outputs Adjustable from 2.2V to 6V
  • 0.5% Typical Load Regulation Error
  • 0.002%/V Typical Line Regulation Error

All trademarks are the property of their respective owners.

  • 200 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 Package

Key Specifications

  • 96% Efficient
  • 5.5V to 30V Input Range
  • Dual Outputs Adjustable from 2.2V to 6V
  • 0.5% Typical Load Regulation Error
  • 0.002%/V Typical Line Regulation Error

All trademarks are the property of their respective owners.

The LM2640 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 200 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 LM2640 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 200 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 LM2640 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

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