SC185EULTRT

Voltage - Input (Max):	5.5V
Supplier Device Package:	16-MLPQ-UT (3x3)
Package / Case:	16-UFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	1.5MHz
Current - Output:	4A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.2V
Series:	--
Voltage - Input (Min):	2.9V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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SC185EULTRT Application Field and Working Principle

The SC185EULTRT is a DC-DC switching regulator which offers high efficiency, excellent line and load regulation, and protection from inrush current. It is designed for use in applications requiring power conversion from a wide input range to a nominal 5 V or 3.3 V output voltage. This regulator is available in a 5 x 5 mm surface-mounted package, and its small size makes it suitable for applications in space-constrained areas.

Application Field

SC185EULTRT DC-DC switching regulators are commonly used for power conversion in small applications, such as consumer electronics, embedded systems, and industrial control. In consumer electronics, the SC185EULTRT can be used for powering displays and other low-voltage peripherals. It can also be used to power motherboards, RAM modules, and CPU chips in embedded systems. In industrial control applications, the SC185EULTRT can be used to provide power to PLCs, automation controllers, and other control systems.

Working Principle

The SC185EULTRT utilizes a buck topology in order to achieve its efficient conversion of input voltages to a regulated output. This regulator takes advantage of the wide input voltage range in order to ensure that an appropriate voltage level is established for the output. The wide input range also allows the SC185EULTRT to be used in applications with distributed power sources.The SC185EULTRT utilizes a high-side MOSFET switch which is turned on and off rapidly in order to create the stepped-down output voltage. The on-time and off-time of the switch is determined by the internal voltage loop feedback. The pulse width of the switch is adjusted by the voltage loop feedback in order to maintain a constant output voltage, even when line and load conditions change.The SC185EULTRT also features an internally programmed foldback current limit which provides additional protection from inrush current at power-up. This feature limits the peak current which flows through the MOSFET switch in order to protect against over-temperature and over-current conditions. The foldback current limit also reduces the average current in order to maximize efficiency.

Conclusion

The SC185EULTRT is a compact and efficient DC-DC switching regulator. It is suitable for power conversion in small applications, such as consumer electronics, embedded systems, and industrial control. This regulator utilizes a buck topology and a high-side MOSFET switch in order to produce a stepped-down output voltage from a wide input range. In addition, the SC185EULTRT incorporates an internal foldback current limit which provides protection from inrush current and helps to maximize efficiency.

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