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LTC3541-3 - High Efficiency Buck + VLDO Regulator

Description

The LTC®3541-3 combines a synchronous buck DC/DC converter with a very low dropout linear regulator (VLDO™ regulator) and internal feedback resistor networks to provide two output voltages from a single input voltage with minimum external components.

Features

  • nn High Efficiency 500mA Buck Plus 300mA VLDO Regulator nn Auto Start-Up Powers VLDO/Linear Regulator Output Prior to Buck Output nn Independent 500mA High Efficiency Buck (VIN: 2.7V to 5.5V) nn 300mA VLDO Regulator with 30mA Standalone Mode nn No External Schottky Diodes Required nn Fixed Buck Output Voltage: 1.8V nn VLDO Input Voltage Range (LVIN: 1.675V to 5.5V) nn Fixed VLDO Output Voltage: 1.575V nn Selectable Fixed Frequency, Pulse-Skip Operation or Burst Mode® Operation nn Short-Circuit P.

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Full PDF Text Transcription

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LTC3541-3 High Efficiency Buck + VLDO Regulator FEATURES nn High Efficiency 500mA Buck Plus 300mA VLDO Regulator nn Auto Start-Up Powers VLDO/Linear Regulator Output Prior to Buck Output nn Independent 500mA High Efficiency Buck (VIN: 2.7V to 5.5V) nn 300mA VLDO Regulator with 30mA Standalone Mode nn No External Schottky Diodes Required nn Fixed Buck Output Voltage: 1.8V nn VLDO Input Voltage Range (LVIN: 1.675V to 5.5V) nn Fixed VLDO Output Voltage: 1.575V nn Selectable Fixed Frequency, Pulse-Skip Operation or Burst Mode® Operation nn Short-Circuit Protected nn Current Mode Operation for Excellent Line and Load Transient Response nn Shutdown Current: <3µA nn Constant Frequency Operation: 2.
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