RT9055-CCWSC Integrated Circuits (ICs)

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Output Configuration:	Positive
Output Type:	Fixed
Number of Regulators:	2
Voltage - Input (Max):	5.5V
Voltage - Output (Min/Fixed):	1.2V, 1.2V
Voltage - Output (Max):	--
Voltage Dropout (Max):	0.55V @ 300mA, 0.55V @ 300mA
Current - Output:	300mA, 300mA
Current - Quiescent (Iq):	58µA
PSRR:	70dB ~ 38dB (100Hz ~ 300kHz)
Control Features:	Enable
Protection Features:	Over Current, Over Temperature, Short Circuit
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	6-UFBGA, WLCSP
Supplier Device Package:	6-WLCSP (1.2x0.80)

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RT9055-CCWSC Application Field and Working PrincipleThe RT9055-CCWSC is a CMOS linear voltage regulator from Richtek Technology Corporation that is designed for low dropout (LDO) voltage regulation in a wide range of applications. It provides an output voltage from 0.8V to 5.5V, with a load current of up to 1.5A. This device employs foldback current limiting, short circuit protection, and thermal protection functions to ensure its safe operation.The RT9055-CCWSC is suitable for use in battery-powered systems such as smart phones, tablets, portable medical equipment, and other portable systems that require low voltage regulation. This device also has excellent output regulation characteristics, low noise, and fast response. In addition, it has an enable pin that can actively control the output voltage, allowing for greater flexibility in system design.The RT9055-CCWSC device uses a P-channel MOSFET as its pass element for low-bias voltage, which has the added benefit of enhanced power supply rejection. It also features a 10mV reference voltage and excellent line and load regulation characteristics up to 0.1%.The RT9055-CCWSC has been optimized to minimize power consumption and is able to operate within a supply voltage range of 2.2V to 6.0V. With its low quiescent current of 18µA, this device is able to provide a low overall power consumption in battery-powered systems.In terms of its physical design, the RT9055-CCWSC is housed in a SOT-23-6 package which allows it to occupy minimal board space. This device is also lead-free, RoHS compliant, and can operate over a wide temperature range of -40°C to +125°C.The RT9055-CCWSC device is based on the common source configuration and works on the principle of negative feedback. When the VOUT pin is powered and the FB voltage is less than the internal reference voltage, the load current will draw from the input pin and step down to the output pin. When the FB voltage reaches the internal reference voltage, the output voltage will be regulated and the excess voltage will be equalized from the feedback loop, preventing any overshoot. This device also includes an enable pin that allows the output voltage to be turned on and off when required.The RT9055-CCWSC device is an ideal voltage regulator for a variety of applications that require low-noise and low-dropout performance. With its wide range of features and small package, it is the perfect solution for battery-powered systems that require controlled voltage regulation.

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