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LM2640 - Dual Adjustable Step-Down Switching Power Supply Controller

General Description

The LM2640 is a dual step-down power supply controller intended for application in notebook personal computers and other battery-powered equipment.

Key Features

  • 1.
  • 2 200 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 A.

📥 Download Datasheet

Datasheet Details

Part number LM2640
Manufacturer Texas Instruments
File Size 1.42 MB
Description Dual Adjustable Step-Down Switching Power Supply Controller
Datasheet download datasheet LM2640 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM2640 www.ti.com SNVS019B – DECEMBER 1998 – REVISED APRIL 2013 LM2640 Dual Adjustable Step-Down Switching Power Supply Controller Check for Samples: LM2640 FEATURES 1 •2 200 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 APPLICATIONS • Notebook and Subnotebook Computers • Wireless Data Terminals • Battery-Powered Instruments KEY SPECIFICATIONS • 96% Efficient • 5.5V to 30V Input Range • Dual Outputs Adjustable from 2.2V to 6V • 0.