LP3855ESX-1.8

Current - Output:	1.5A
Base Part Number:	LP3855
Supplier Device Package:	DDPAK/TO-263-5
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	73dB ~ 57dB (120Hz)
Current - Supply (Max):	10mA
Current - Quiescent (Iq):	3mA
Series:	--
Voltage Dropout (Max):	0.38V @ 1.5A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	7V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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<p>The LP3855ESX-1.8 is a type of linear voltage regulator manufactured by Texas Instruments. It can achieve a very low noise output even in low output current application and is classified as a PMIC (Power Management IC). The voltage regulator incorporates an integrated voltage reference, current detectors and an active output discharge for faster response time. The device offers input voltage range from 2.7V to 5.5V and output voltage from 1.25V to 5V. As the output current rises, it produces excellent power supply rejection ratio and load regulation.</p><p>The LP3855ESX-1.8 is designed to operate in step-down and step-up topology, hence it offers versatility and cost savings benefits as it eliminates the need for additional components. The device offers low power operation and is ideal for a wide variety of high noise sensitive applications such as audio systems, portable data terminals and remote network components. It offers a switching frequency up to 900KHz and power up sequencing for powering up multiple rails. In addition, the device has integrated short-circuit and over-temperature protection features.</p><p>Overall, the LP3855ESX-1.8 is an efficient linear voltage regulator that provides high current, steady output even in low input conditions, while at the same time maintaining excellent power supply rejection ratio (PSRR). This voltage regulator can handle wide input voltage range, offer high frequency and current sense amplifiers while being cost effective. Additionally, the LP3855ESX-1.8 is designed to be pin-compatible with the Linear Technology \'LT3880\' regulator.</p><p>Understanding the working principle of the LP3855ESX-1.8 is important. The regulator operates in two steps. The first step is the voltage reference circuit where a reference voltage is generated. This reference voltage is compared to the voltage at the feedback pin. If the voltage at the feedback pin is lower than the reference voltage, then the regulator output is increased. The second stage is the voltage control circuit which is responsible for controlling the output voltage of the regulator. This is done by comparing the voltage feedback to the reference voltage .If the voltage feedback is higher than the reference voltage, the regulator output is decreased.</p><p>Typical application area of LP3855ESX-1.8 includes analogue to digital converters, digital to analogue converters, audio amplifiers, RF power amplifiers, cellular base stations, instrumentation amplifiers and other embedded applications. The regulator offers high switching frequency and low power consumption, making it a suitable choice for battery operated devices.</p><p>In summary, the LP3855ESX-1.8 is an ideal voltage regulator for high noise sensitive applications. It offers high current operation with excellent power supply rejection ratio and low power consumption. The device is ideal for a wide range of applications from instruments to remote network components.</p>

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