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LTC3446 - Monolithic Buck Regulator

Description

The LTC®3446 combines a synchronous buck DC/DC converter with two very low dropout (VLDO) linear regulators to provide up to three stepped-down output voltages from a single input voltage.

Features

  • n High Efficiency Triple Step-Down Outputs from a Single Input Supply n 1A Synchronous Buck Regulator Provides Main Step-Down Output and Powers Two 300mA VLDO™ Linear Regulators n Output Voltages as Low as 400mV (VLDO Outputs) n Power Good Output n Input Voltage Range: 2.7V to 5.5V n Independent Enable Pin for Each Supply n Low (140µA Typ) No-Load Quiescent Current with All Outputs Enabled n Constant Frequency Current Mode Operation n 2.25MHz Switching Frequency Uses Small Inductors n Defeatable.

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Datasheet preview – LTC3446

Datasheet Details

Part number LTC3446
Manufacturer Linear Technology
File Size 283.31 KB
Description Monolithic Buck Regulator
Datasheet download datasheet LTC3446 Datasheet
Additional preview pages of the LTC3446 datasheet.

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Full PDF Text Transcription

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Features n High Efficiency Triple Step-Down Outputs from a Single Input Supply n 1A Synchronous Buck Regulator Provides Main Step-Down Output and Powers Two 300mA VLDO™ Linear Regulators n Output Voltages as Low as 400mV (VLDO Outputs) n Power Good Output n Input Voltage Range: 2.7V to 5.5V n Independent Enable Pin for Each Supply n Low (140µA Typ) No-Load Quiescent Current with All Outputs Enabled n Constant Frequency Current Mode Operation n 2.25MHz Switching Frequency Uses Small Inductors n Defeatable Automatic Burst Mode® Operation for High Efficiency at Light Loads n ±1.
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