AP2121N-1.5TRE1

Voltage Dropout (Max):	0.6V @ 200mA
Supplier Device Package:	SOT-23-3
Package / Case:	TO-236-3, SC-59, SOT-23-3
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current
Control Features:	--
PSRR:	70dB (1kHz)
Current - Quiescent (Iq):	50µA
Current - Output:	200mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.5V
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 AP2121N-1.5TRE1 is a linear voltage regulator specifically designed for switching industry applications. It is designed to convert an input voltage of up to 1.5 V down to 1.0 V at up to 1.2 A of output current and with a maximum voltage drop of 0.8V. It is a 3-Terminal adjustable shunt regulator available in a SOT-89 package and features low dropout, low cost, low power dissipation and low output noise.

Functionality

The AP2121N-1.5TRE1 can be used to provide a regulated power supply output from an input of up to 1.5V. The output voltage is determined by the voltage drop across an external resistor. The output voltage is adjustable and the regulator is capable of delivering up to 1.2 A of continuous output current with a voltage droop of 0.8 V. The regulator also offers protection against short-circuit conditions and reversed-polarity input voltages.

Features

The AP2121N-1.5TRE1 provides a number of features that make it suitable for a wide range of applications:

• High efficiency and low output noise.
• Low dropout voltage and low power dissipation
• High noise rejection with an integrated filter capacitor.
• Adjustable output voltage range of 0.9 V to 1.5V.
• High output current of up to 1.2 A.
• Reverse current protection.
• Low cost, small size and easy to install.

Applications

The AP2121N-1.5TRE1 is suitable for a variety of linear voltage regulator applications including:

• Power supplies for battery-powered systems.
• Power management systems.
• DC-DC converters.
• Voltage regulators in LCD and LED displays.
• Industrial control systems.
• Telecommunication equipment.

Working Principle

The AP2121N-1.5TRE1 is a linear voltage regulator which regulates the output voltage by dissipating power as heat. In the simplest form, it works by sensing the output voltage and then adjusting the current through a regulating element, such as a transistor, or zener diode to maintain the voltage at the desired level.The AP2121N-1.5TRE1 uses a two-stage design, which means that the current used to regulate the output is divided into two currents. The first current is used in the error amplifier which senses the output voltage and provides a feedback signal to the output control circuit. The second current is used in the output control circuit which adjusts the current through the regulator element to maintain the output voltage at the desired level.

Conclusion

The AP2121N-1.5TRE1 is a linear voltage regulator specifically designed for switching industry applications. It provides high efficiency and low output noise with a low dropout voltage and low power dissipation. It is adjustable, offering users the ability to customise their voltage requirements for a wide range of applications. The regulator also offers protection against short-circuit conditions and reversed-polarity input voltages. Overall, the AP2121N-1.5TRE1 makes an excellent choice for a variety of linear voltage regulator applications.

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