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LM2640 Datasheet Dual Adjustable Step-down Switching Power Supply Controller

Manufacturer: Texas Instruments

Overview: LM2640 .ti. SNVS019B – DECEMBER 1998 – REVISED APRIL 2013 LM2640 Dual Adjustable Step-Down Switching Power Supply Controller Check for Samples:.

Datasheet Details

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

General Description

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

Fixed-frequency synchronous drive of logic-level Nchannel power MOSFETs is bined 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.

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.

LM2640 Distributor