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LTC3644 - 1.25A Parallelable Synchronous StepDown Regulator

General Description

The LTC®3644/LTC3644-2 is a quad 1.25A output, high efficiency synchronous monolithic step-down regulator capable of operating from input supplies up to 17V.

The switching frequency is internally fixed to 1MHz or 2.25MHz with a ±50% synchronization range.

Key Features

  • n Quad Step-down Outputs: 1.25A per Channel n Wide VIN Range: 2.7V to 17V n Wide VOUT Range: 0.6V to VIN n 1.25A/2.5A/3.75A/5A IOUT Configurable with One Inductor n Integrated 300mΩ P-Channel/80mΩ N-Channel MOSFETs Provide Up to 93% Efficiency n No-Load Burst Mode Operation IQ < 10µA with All Channels Enabled n Constant Frequency (1MHz/2.25MHz) with ±50% Frequency Synchronization Range n ±1% Output Voltage Accuracy n Current Mode Operation for Excellent Line and Load Transient Response n Full Dr.

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Datasheet Details

Part number LTC3644
Manufacturer Analog Devices
File Size 1.50 MB
Description 1.25A Parallelable Synchronous StepDown Regulator
Datasheet download datasheet LTC3644 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.

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LTC3644/LTC3644-2 Quad 17V, 1.25A Parallelable Synchronous StepDown Regulator with Ultralow Quiescent Current FEATURES n Quad Step-down Outputs: 1.25A per Channel n Wide VIN Range: 2.7V to 17V n Wide VOUT Range: 0.6V to VIN n 1.25A/2.5A/3.75A/5A IOUT Configurable with One Inductor n Integrated 300mΩ P-Channel/80mΩ N-Channel MOSFETs Provide Up to 93% Efficiency n No-Load Burst Mode Operation IQ < 10µA with All Channels Enabled n Constant Frequency (1MHz/2.25MHz) with ±50% Frequency Synchronization Range n ±1% Output Voltage Accuracy n Current Mode Operation for Excellent Line and Load Transient Response n Full Dropout Operation (100% Duty Cycle) n Phase Shift Programmable with External Clock n 5mm × 5mm × 1.