LP2985AIM5X-2.8/NOPB

Current - Output:	150mA
Base Part Number:	LP2985
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	45dB (1kHz)
Current - Supply (Max):	2.5mA
Current - Quiescent (Iq):	95µA
Series:	--
Voltage Dropout (Max):	0.58V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The LP2985AIM5X-2.8/NOPB is a regulated low-dropout linear voltage regulator (LDO) manufactured by Texas Instruments. It is specifically designed for use in mobile handset, portable and battery-powered applications. The device offers wide input voltage operation from 0.5 V to 5.5 V with an output voltage range from 0.8 V to 5.0 V, and up to 150 mA output current. This LDO also features low quiescent current (95 μA under no load condition). The LP2985AIM5X-2.8/NOPB can also efficiently control the supply current of the load without affecting the regulated output voltage. It has both enable and shutdown modes, and the enable terminal of the regulator provides the connection between host and load. This LDO also features current limiting, thermal protection, and over-voltage protection.

Applications

The LP2985AIM5X-2.8/NOPB is ideal for applications such as GSM, CDMA, and DCS-1800/1900 mobile handsets, portable and battery-powered equipments. Its wide operating temperature range from -40°C to +125°C allows the use of this device in numerous portable and industrial applications. The device can be used in battery-powered application where low quiescent current, low dropout voltage, fast transient response, and short-circuit protection are required. The wide input voltage range allows it to be powered from a single-cell Li-ion (Li+) or NiMH power supply. It can also be used in audio, LCD backlighting, medical systems, systems USB power as well as other industrial applications.

Working Principle

The LP2985AIM5X-2.8/NOPB is a low dropout voltage regulator that induces a steady voltage level from an input power source. It works by comparing the input voltage from the power source to a set level, called the reference voltage. Then, the regulator lowers the input voltage to match the reference voltage. This voltage is then outputted to the load. The ability of the LP2985AIM5X-2 enables the device to maintain the output voltage even when the input voltage drops below the nominal value and still be able to supply the required power to the load.To protect the device, the LP2985AIM5X-2.8/NOPB has built in thermal, current, and over-voltage protection. The device only tolerates a set current load, and a current limit feature will shut down the regulator if the current is higher than the set limit. In summary, the LP2985AIM5X-2.8/NOPB is an ideal device for mobile handset, portable and battery-powered applications due to its wide input voltage operation, current limiting, thermal protection, and over-voltage protection. Its built-in low dropout linear voltage regulator can efficiently control the supply current of the load without affecting the regulated output voltage.

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