LD29080PT18R

Current - Output:	800mA
Base Part Number:	LD29080
Supplier Device Package:	PPAK
Package / Case:	TO-252-5, DPak (4 Leads + Tab), TO-252AD
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	72dB (120Hz)
Current - Supply (Max):	35mA
Current - Quiescent (Iq):	180µA
Series:	--
Voltage Dropout (Max):	0.7V @ 800mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	13V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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LD29080PT18R Application Field and Working PrincipleLD29080PT18R is an advanced linear low-dropout (LDO) voltage regulator from the SOT-23 package series, developed using the LD29080PT18R. It is a low-noise and ultra-low-drop regulator specifically designed to meet the requirements of mobile phone and portable electronics applications.The device integrates an optimized combination of trickle-charging, current limit regulation, and reverse current protection, enabling higher current output with low noise and low ripple.The LD29080PT18R is used to provide power to circuits that are sensitive to noise and require low quiescent current for portable applications. Low noise and low dropout voltage limit the supply voltage ripple and ensure that sensor output wii not be disturbed. The LDO is also able to deliver power over a wide range of input and output voltages, ideal for powering load applications with wide voltage ranges.The LD29080PT18R is available in four different fixed output voltages, providing supply flexibility and is configured to support a wide input voltage range. The output current is limited to 800mA, making it well suited for powering sensitive ICs and other peripheral components.When the supply voltage is applied to the device, the LD29080PT18R starts regulating the output voltage. The regulator maintains the reference voltage, as set by the user, stable. To achieve this, the regulator has two main electrical components which act as the main source of power. The first component is the feedback circuit which monitors the output voltage and compares it with the reference voltage.The feedback circuit then adjusts the input voltage to the transistor, based on the output voltage difference. The transistor is used as a voltage amplifier and works on the principle of BJT (Bipolar Junction Transistors). BJT comprises two junctions of a semiconductor material and works as a switch, so it is also known as a switch amplifier.When the switch is opened, the LD29080PT18R switches off and when it is closed, the regulator is in operation. This switching process results in a regulated output voltage. As the transistor is switched in and out of the circuit, the output voltage is regulated by way of an On/Off mechanism.The LD29080PT18R includes short circuit and overload protection features, helping to protect the device and ensuring that it delivers an optimized output with excellent accuracy and reliability.In summary, LD29080PT18R is an efficient and reliable low dropout regulator, which provides clean and low noise power supply. It has wide input voltage range and is suitable to support wide range of output voltage. It is perfect for use in mobile phones, tablets, portable and handheld electronic devices, and can also be used for backup power, such as in cameras and audio systems.

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