LM1117DT-2.85/NOPB

Current - Output:	800mA
Base Part Number:	LM1117
Supplier Device Package:	TO-252-3
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	75dB (120Hz)
Current - Supply (Max):	10mA
Current - Quiescent (Iq):	5mA
Series:	--
Voltage Dropout (Max):	1.2V @ 800mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.85V
Voltage - Input (Max):	15V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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<h2>Introduction</h2>The LM1117DT-2.85/NOPB is a low-dropout 3.3V linear regulator fabricated in advanced power-management CMOS technology, with an output-voltage capability of 3.0V to 3.6V. The LM1117DT-2.85/NOPB includes an integrated advanced P-channel MOSFET and a full-protection circuit including soft-start, thermal shutdown, over-current protection and output current-limit.<h2>Application Field</h2>The LM1117DT-2.85/NOPB is suitable for a range of high current, low voltage and low-power device applications. It is ideal for use in notebook and laptop personal computer, battery-backup systems, portable and wireless equipment, networking and communications systems. It is also suited for automotive electronics and other applications requiring high current and low voltage.The regulation characteristics of the LM1117DT-2.85/NOPB make it ideal for use in many low-power systems. With its low-dropout voltage, the LM1117DT-2.85/NOPB can provide a very efficient solution for low-power applications. It is well suited for powering digital logic circuits when used in a voltage-regulating configuration.<h2>Working Principle</h2>The LM1117DT-2.85/NOPB is an adjustable 3.3V voltage regulator which is used primarily to provide a stable regulated voltage from an unregulated input source. It works on a negative-feedback principle: the output voltage is controlled by the input voltage according to the following equation:vout - vref = n(vin - vref) where n is the voltage regulation factor, which is fixed for the LM1117DT-2.85/NOPB.The LM1117DT-2.85/NOPB comparator monitors the output voltage and adjusts it, using an integrated P-channel MOSFET, to maintain a constant output voltage despite any changes in the input voltage. The output voltage is also protected against short-circuit, over-current, and thermal overload conditions. A soft-start feature is provided to minimize inrush current.<h2>Conclusion</h2>The LM1117DT-2.85/NOPB is a 3.3V low-dropout voltage regulator that is ideal for high current, low voltage and low-power devices such as notebook and laptop PC applications. It works on the negative-feedback principle, where the output voltage is monitored and adjusted according to the equation vout - vref = n(vin - vref). It is also protected against short-circuit, over-current, and thermal overload conditions. With its low-dropout voltage, the LM1117DT-2.85/NOPB can provide a very efficient solution for low-power applications.

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