ホーム パワー・マネージメント AC/DC と DC/DC の各コントローラ (外部 FET)

LDO 搭載、5.5V ~ 30V 入力、300kHz、DCAP2 モード、デュアル、同期整流降圧コントローラ

LM2641 は新規設計での使用を推奨しません
これまでにご購入されたお客様をサポートする目的でこの製品を引き続き生産しています。新規設計では代替品をご検討ください。
open-in-new 代替品と比較
比較対象デバイスと類似の機能
TPS56837 アクティブ 4.5V ~ 28V 入力、8A 同期整流降圧コンバータ Higher power density integrated FET converter solution for up to 8A output current

製品詳細

Vin (min) (V) 5.5 Vin (max) (V) 30 Iout (max) (A) 5 Operating temperature range (°C) 0 to 0 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 2.2 Vout (max) (V) 6 Features Enable, Frequency synchronization, Light Load Efficiency, Power good Iq (typ) (µA) 600 Duty cycle (max) (%) 98 Number of phases 1
Vin (min) (V) 5.5 Vin (max) (V) 30 Iout (max) (A) 5 Operating temperature range (°C) 0 to 0 Control mode current mode Topology Buck Rating Catalog Vout (min) (V) 2.2 Vout (max) (V) 6 Features Enable, Frequency synchronization, Light Load Efficiency, Power good 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.

ダウンロード

技術資料

star =TI が選定したこの製品の主要ドキュメント
結果が見つかりませんでした。検索条件をクリアしてから、再度検索を試してください。
1 をすべて表示
種類 タイトル 最新の英語版をダウンロード 日付
* データシート LM2641 Dual Adjustable Step-Down Switching Power Supply Controller データシート (Rev. B) 2013年 4月 3日

購入と品質

記載されている情報:
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報:
  • ファブの拠点
  • 組み立てを実施した拠点