LTC3833IUDC#PBF

Frequency - Switching:	200kHz ~ 2MHz
Base Part Number:	LTC3833
Supplier Device Package:	20-QFN (3x4)
Package / Case:	20-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Frequency Control, Power Good, Soft Start, Tracking
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 38 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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<p>The LTC3833IUDC#PBF is a synchronous buck-boost switching regulator controller and easily the most versatile of the switching regulators. It can deliver up to 2A of output current over an adjustable output voltage range of 2.5V to 28V with no external components required for most applications. It has an integrated buck-boost regulator and buck regulator current monitoring, as well as easy logic-level enable/disable control. It also provides dynamic voltage scaling, allowing the external power supply voltage to be continuously adjusted while the device is in operation. The device also offers current foldback protection and has a range of protection features, such as overcurrent protection, overvoltage protection, current limit, thermal shutdown and open-loop fault. It is suitable for use in applications such as battery chargers, DC/DC converters, automotive and medical applications, high-efficiency power supplies and point-of-loads.</p><p><strong>Application Field and Working Principle</strong></p><p>The LTC3833IUDC#PBF utilizes a synchronous buck-boost controller for efficient operation in both buck and boost applications. This allows the device to switch at up to 4MHz for fast transient response, low output ripple and quick response to load changes. As the device integrates the switching regulator and controller into a single package, it eliminates the need for external MOSFETs or drivers and adds the ability to provide dynamic voltage scaling and current monitoring. The device operates by using a fixed frequency pulse width modulation control loop and a true multi-phase current-mode architecture to provide a low output ripple, fast transient response and excellent line and load regulation accuracy. The device has adjustable operating frequency and soft-start, as well as built-in thermal and overvoltage protection.</p><p>The LTC3833IUDC#PBF is ideal for automotive, industrial and portable applications, as well as applications requiring a flexible power source. Its features include current foldback protection and programmable peak current level limit, as well as adjustable operating frequency and soft-start. It also provides dynamic voltage scaling and adjustable output voltage range. This device is suitable for a wide range of applications, such as DC/DC converters, battery chargers, high-efficiency power supplies and point-of-load.</p><p>The LTC3833IUDC#PBF is easy to use and comes with a range of features that make it a safer and more efficient option than other switching regulators. The feedback pin contains temperature and current monitoring. The soft-start feature reduces in-rush current and helps prevent over-voltage conditions on start-up. The device has a selectable input or output side synchronous rectification which can save power in buck applications. The device also has a logic-level enable/disable control which can be used for low noise or power-saving modes. The LTC3833IUDC#PBF also contains a current limit feature that protects against overcurrent or short-circuit conditions.</p><p>Overall, the LTC3833IUDC#PBF is a versatile and efficient synchronous buck-boost switching regulator controller suitable for a range of automotive, industrial and portable applications. It offers dynamic voltage scaling, current monitoring, adjustable operating frequency, soft-start and overload protection, making it one of the most popular switching regulators on the market.</p>

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