LTC3646IDE#PBF

Voltage - Output (Min/Fixed):	2V
Base Part Number:	LTC3646
Supplier Device Package:	14-DFN (4x3)
Package / Case:	14-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	200kHz ~ 3MHz
Current - Output:	1A
Voltage - Output (Max):	30V
Series:	--
Voltage - Input (Max):	40V
Voltage - Input (Min):	4V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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PMIC - Voltage Regulators - DC DC Switching Regulators

The LTC3646IDE#PBF is a low-cost step-down switch mode power supply (regulator) for DC to DC applications. The device provides a fixed 3.3V output from a wide input voltage range of between 4.5 watts to 28 watts. The design features of the device make it an ideal candidate for residential, small business, and medium applications such as servers, tablet PCs and embedded systems.The LTC3646IDE#PBF has an adjustable voltage range of between 0.6V to 3.3V, allowing for a wide range of uses and applications. The device can operate with a current up to 12A and comes in fixed, adjustable and external versions. The device also features protection against back-powering, over-current, over-voltage, and short-circuit conditions that are monitored and controlled.The LTC3646IDE#PBF has a low power shutdown mode with internal reset and a low-ripple mode. It has an on-board voltage reference, internal P-Channel and N-Channel MOSFETs and an adjustable frequency up to 1MHz. The device also features an LED indicator for indicating power-on condition, as well as a power-good indicator on-board.When it comes to the working principle of the LTC3646IDE#PBF, the device utilizes an adjustable buck topology with an internal low-dropout regulator (LDO) to control the output voltage. The internal LDO provides good regulation accuracy, line and temperature compensation, and a soft-start feature.The output voltage is set by an external gain setting resistor and can be adjusted using the on-board trimmers. The device also has an on-board current-limit (CL) comparator to shut down the device if the output current exceeds a certain limit. The trimmers are used to set the maximum duty cycle and the current-limit threshold, while the frequency can be adjusted depending on the switching frequency selected.When the output voltage reaches the desired value, the control circuit will automatically switch back to the normal operation mode. The normal operation mode is the low-dropout regulator (LDO) that provides an output voltage close to the desired value.All these features bundled into the LTC3646IDE#PBF make it an ideal choice for a wide range of applications. With its wide input voltage range, low power shutdown mode, low ripple output, adjustable voltage and current-limit features, this device is suitable for a wide range of switched mode power supply (SMPS) applications.

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