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LTC3440 Datasheet PDF

Part Series:LTC3440 Series
Category:DC-DC Converters
Description:Buck-Boost Switching Regulator IC Positive Adjustable 2.5V 1 Output 600mA 10-TFSOP, 10-MSOP (0.118", 3mm Width)
Document:LTC3440EMS#PBF Datasheet PDF (22 Pages)

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LTC3440 - Micropower Synchronous Buck-Boost DC-DC Converter

LTC3440EMS#PBF - Linear Technology Specifications

TYPE
DESCRIPTION
Mounting Style
Surface Mount
Frequency
2 MHz
Number of Pins
10 Pin
Case/Package
MSOP-10
Number of Outputs
1 Output
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LTC3440EMS#PBF - Linear Technology Function Overview

The LTC3440EMS#PBF is a micropower synchronous buck-boost DC/DC Converter operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, multicell alkaline or NiMH applications where the output voltage is within the battery voltage range. The device includes two 0.19R N-channel MOSFET switches and two 0.22R P-channel switches. Switching frequencies up to 2MHz are programmed with an external resistor and the oscillator can be synchronized to an external clock. Quiescent current is only 25µA in Burst Mode® operation, maximizing battery life in portable applications. Burst Mode® operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/SYNC pin has either a clock or is driven low, then fixed frequency switching is enabled.
Single inductor
Fixed frequency operation with battery voltages above, below or equal to the output
Synchronous rectification up to 96% efficiency
25µA Quiescent current in Burst Mode® operation
Up to 600mA continuous output current
No Schottky diodes required (VOUT < 4.3V)
VOUT disconnected from VIN during shutdown
Programmable oscillator frequency from 300kHz to 2MHz
Synchronizable oscillator
Burst Mode® enable control
<1µA Shutdown current
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