LP3905SDX-00/NOPB

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Applications:	Handheld/Mobile Devices
Current - Supply:	--
Voltage - Supply:	3 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	14-WFDFN Exposed Pad
Supplier Device Package:	14-WSON (4x4)
Base Part Number:	LP3905

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LP3905SDX-00/NOPB is a kind of power management integrated circuit developed by Texas Instruments, which is a specialized type of PMIC (Power Management Integrated Circuit). It is mainly used for step-down power supply, and some special applications.The LP3905SDX-00/NOPB allows the user to select the frequency of the output voltage, enabling more efficient operation in applications requiring higher frequencies. It allows the user to select a voltage range from 0.6V to 5.5V with an output current of up to 1A. It also has an adjustable under-voltage lockout which prevents the output from exceeding certain user-defined level.In order to provide a stable operation, the LP3905SDX-00/NOPB device features a “Soft Start” function which gradually increases the output voltage when the device is powered on. This helps to prevent inrush current and overshoot. The device also features a fast turn-off time of just 5us when the power is cut off.The LP3905SDX-00/NOPB device has a wide range of features which make it suitable for different applications. It has a temperature range of 0 - 70°C, and can operate at up to 2.5MHz of frequency with a minimum voltage ripple of 2.7mV (typical) at 25°C and full load. The device supports over-voltage protection, short-circuit and overtemperature protection.The working principle of the LP3905SDX-00/NOPB is simple. The device is switched between the output and the input via a field-effect transistor (FET). The output voltage is adjustable by changing the ON-OFF state of the FET. When the FET is turned ON, the output voltage is generated. When the FET is turned OFF, the output voltage is sustained. By modulating the frequency and duty cycle of the switch, the output voltage can be optimized to the application.In summary, the LP3905SDX-00/NOPB is a specialized type of PMIC (Power Management Integrated Circuit) which enables efficient operation in applications requiring higher frequencies. It features a wide range of useful features, such as an adjustable under-voltage lockout, soft start functionality and overtemperature protection. The main application for this device is step-down power supplies, as well as some special applications. The working principle of the device is simple and easy to understand, and provides a great deal of flexibility and control over the output voltage.

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