LDS3985PU33RY

Current - Output:	300mA
Base Part Number:	LDS3985
Supplier Device Package:	6-DFN (3x3)
Package / Case:	6-VDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	Shutdown
PSRR:	55dB ~ 50dB (1kHz ~ 10kHz)
Current - Supply (Max):	300µA
Current - Quiescent (Iq):	150µA
Series:	Automotive, AEC-Q100
Voltage Dropout (Max):	0.25V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	6V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LDS3985PU33RY is an integrated linear voltage regulator. It is used to create a stable voltage output from a varying input voltage, by controlling the current flow from the input to the output. The device has been designed to reduce power dissipation and simplify the design of a stable voltage supply.

Application Field

The LDS3985PU33RY is well-suited for use in portable and mobile applications, where size and power dissipation are critical design considerations. The device is ideal for low-current output applications, such as supplying logic level voltages to microcontrollers and interface chips, and powering small electronics such as smart phones and wireless communications devices.The LDS3985PU33RY is ideal for use in automotive applications, where power (supply and return) is fluctuating and constant and stable output voltages are required for proper operation of vital components.

Working Principle

The LDS3985PU33RY is a linear regulator, meaning it uses a feedback loop to ensure the output voltage remains constant. The device takes a varying input voltage, and regulates it by controlling the current from the input to the output using a feedback loop.The key elements of the LDS3985PU33RY\'s control circuit are the reference voltage, reference current, error amplifier, and control FET. The reference voltage sets the output voltage, which is achieved by controlling the reference current, allowing the error amplifier to compare the output voltage to the reference voltage and adjust the control FET accordingly.The LDS3985PU33RY uses pulse width modulation (PWM) to achieve fast response times and a wide voltage range. PWM allows the LDS3985PU33RY to switch between fast and slow modes, depending on the load current, to further improve efficiency and reduce power dissipation.

Conclusion

The LDS3985PU33RY is an integrated linear voltage regulator, designed to reduce power dissipation and simplify the design of a stable voltage supply, making it ideal for use in portable and mobile applications and automotive applications. The device is capable of regulating a range of voltages by controlling the current from the input to the output using a feedback loop, and it also uses pulse width modulation (PWM) to achieve fast response times and a wide voltage range.

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