NCP6914AFCDT1G

Voltage/Current - Output 3:	1.8V, 300mA
Supplier Device Package:	20-WLCSP (1.62x2.02)
Package / Case:	20-UFBGA, WLCSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	2.3 V ~ 5.5 V
w/Sequencer:	Yes
w/Supervisor:	No
w/LED Driver:	No
Series:	--
Voltage/Current - Output 2:	1.8V, 300mA
Voltage/Current - Output 1:	1.2V, 800mA
Frequency - Switching:	3MHz
Number of Outputs:	5
Function:	Any Function
Topology:	Step-Down (Buck) (1), Linear (LDO) (4)
Part Status:	Active
Packaging:	Tape & Reel (TR)

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NCP6914AFCDT1G is a type of linear regulator plus switching regulator IC (Integrated Circuit) designed for providing power for portable battery-operated systems such as tablets, smartphones and other mobile devices. It features a single-output voltage regulator with a maximum output current of 450mA with a wide input voltage range from 2.65V to 5.5V. It also incorporates a RDS(ON) low dropout linear regulator, allowing for energy efficient regulation of the output voltage.

Functionality

NCP6914AFCDT1G operates as a linear plus switching regulator by controlling the switching frequency of the internal MOSFETs. It also has a power switching control loop that allows for efficient conversion at light load conditions too. This ensures a wide range of output voltage is available to support various systems. It also has a power-on reset function that ensures the output voltage is stabilized during start up. The device has two Modes of operation: low power mode (<3.3V) and high power mode (>3.3V). In low power mode, the device operates with a switching frequency of 200kHz and in high power mode it operates with a switching frequency of 500kHz. This helps in maintaining the output voltage with minimal ripple. The device also features thermal shutdown protection as well as Overtemperature Protection (OTP) with a programmable threshold.

Features

NCP6914AFCDT1G features a wide input voltage range from 2.65V to 5.5V, making it suitable for a wide range of portable applications. It also has a low quiescent current of only 10µA and is capable of handling up to 450mA at the output. It has a low RDS(ON) of 150mΩ allowing better energy efficiency. The device’s current-limit and short-circuit protection feature helps protect the system from overloads. The device also has a power-on reset function that stabilizes the output voltage during start up. It also has thermal shutdown protection and an OTP threshold set pin to allow for user configuration. The package of the NCP6914AFCDT1G is very small, making it ideal for space-constrained applications.

Applications

NCP6914AFCDT1G is ideal for space-constrained, portable battery-powered systems such as tablets, smartphones and other mobile devices. It can also be used in medical devices and systems, systems requiring eight-cell Li-ion configurations and automotive application systems.

Working Principle

NCP6914AFCDT1G works through a combination of linear and switching regulators. The device uses a linear regulator to provide a stable output voltage while the switching regulator helps in providing high efficiency at light load conditions. The device operates with a fixed switching frequency of either 200kHz or 500kHz depending on the input voltage. The device runs with a quiescent current of only 10µA.The device uses two MOSFETs, one connected between the device input and the load, and the other connected between the device input and the ground. When the device is powered on, the two MOSFETs alternately open and close. The closing of one MOSFET creates a low impedance path between the input and the load, while the opening of the other MOSFET creates a high impedance path between the input and the ground. When the MOSFET switches ON, the current flows from the input to the output. When the MOSFET switches OFF, the voltage at the output is regulated by the internal linear regulator.

Conclusion

The NCP6914AFCDT1G is a type of integrated circuit designed for providing power to portable battery-operated systems. The device operates as a linear plus switching regulator, allowing for efficient conversion at light load conditions as well. It has a wide input voltage range from 2.65V to 5.5V and a maximum output current of 450mA. The device is ideal for a wide range of portable applications including tablets, smartphones and medical devices. It has a low quiescent current and a low RDS(ON) for improved efficiency. The device has features such as power-on reset, thermal shutdown protection, and an OTP threshold set pin for user configuration.

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