TPS60403DBVR

Voltage - Output (Min/Fixed):	-Vin, 2Vin, Vin/2
Base Part Number:	TPS60403
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	250kHz
Current - Output:	60mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.25V
Voltage - Input (Min):	1.8V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Positive or Negative
Function:	Ratiometric
Part Status:	Active
Packaging:	Tape & Reel (TR)

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TPS60403DBVR is a synchronous step-down DC-DC converter in a very small ThinSOT package. It is suitable for a wide variety of applications such as connected device, portable device, storage, communications, audio, video and IoT.The TPS60403DBVR is designed to provide high efficiency and very low quiescent current due to Ultra-low quiescent current range architecture. Its light load efficiency above 75 percent can satisfy the requirement of battery operation.The TPS60403DBVR includes an integrated P-Channel MOSFET to reduce the external components count, thus decreasing the overall system cost. A unique feature of the TPS60403DBVR is Sync-FET™ protection. It uses a P-channel MOSFET to parallelly switch from the synchronous rectifier to the internal current limit circuit. By disconnecting the input to the output, it safely guards the system from input over-voltage conditions such as plugging in the wrong AC-adapter with a wrong voltage into the system.The TPS60403DBVR features a wide input voltage range from 4.5V to 17V and a fixed switch frequency of 1.75MHz so it can easily be used in many applications where space and size are important. It offers up to 3.2A of output current while achieving a very high efficiency of up to 96%.The TPS60403DBVR is offered in a 6-lead thin SOT23 package and provides a wide range of programmable features that make it suitable for a broad range of applications.Working PrincipleThe TPS60403DBVR synchronous buck regulator has an internal structure with five main functional blocks: a 0.4V regular bandgap reference, an error amplifier, a PWM comparator, a driver, and an internal MOSFET.The output voltage is regulated by comparing the voltage on the feedback pin to the 0.4V reference voltage. If the feedback pin voltage is lower than the reference voltage, the error amplifier increases its output voltage. This signal is sent to the PWM comparator whose output signal will be sent to the driver. The driver\'s output signal then modulates the gate signal to increase the on-time and therefore the output voltage. If the feedback voltage is higher than the reference voltage, the output voltage will be decreased as the off-time increases.ConclusionThe TPS60403DBVR is a very small and efficient synchronous step-down DC-DC converter. Its wide input voltage range and high efficiency make it suitable for a variety of applications such as portable and connected devices, storage, communications, audio and video, and IoT. It includes an integrated P-channel MOSFET and Sync-FET™ protection, reducing the external components count and offering high light load efficiency. The TPS60403DBVR is offered in a 6-lead thin SOT23 package.

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