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LM2641

不推薦在新設計中採用

具 LDO 的 5.5 V 至 30 V 輸入、300 kHz 同步 DCAP2 模式雙降壓控制器

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LM2641 不建議用於新設計
儘管為了支援以前的設計而繼續生產此項產品，但我們並不建議用在新設計上。考量下列其中一項替代產品：
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功能相似於所比較的產品
最新 TPS56837 現行 4.5-V 至 28-V 輸入、8-A 同步降壓轉換器 Higher power density integrated FET converter solution for up to 8A output current

LM2641

不推薦在新設計中採用
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 5.5 Vin (max) (V) 30 Iout (max) (A) 5 Operating temperature range (°C) 0 to 0 Control mode current mode Rating Catalog Vout (min) (V) 2.2 Vout (max) (V) 6 Iq (typ) (A) 0.0006 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 Rating Catalog Vout (min) (V) 2.2 Vout (max) (V) 6 Iq (typ) (A) 0.0006 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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* Data sheet LM2641 Dual Adjustable Step-Down Switching Power Supply Controller datasheet (Rev. B) 2013年 4月 3日

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