AP2121N-1.3TRE1

Voltage Dropout (Max):	0.8V @ 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):	1.3V
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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AP2121N-1.3TRE1 is a voltage regulator ideally suited for low output voltage and low power applications. It is a member of the AP2121N family of linear voltage regulators, which are designed to provide precise linear regulation of output voltages with low power consumption and low output voltage ripples. The AP2121N-1.3TRE1 offers output voltages from 1.2V to 5.0V, adjustable using an external ceramic capacitor, and is available in a standard through-hole package. The AP2121N-1.3TRE1 works by providing a constant output voltage whose value is determined by an externally connected capacitor. The device is designed to self-regulate in the event of transient load disturbances and is designed for use in low voltage applications.

Features

• Low power consumption
• High accuracy output voltage
• Low output voltage ripple
• Adjustable output voltage by external capacitive divider
• Low noise
• Fast transient response
• Selectable fixed output currents
• Safety protection features

Applications

• Portable devices
• Cell phones
• PDAs
• MP3/MP4/DVD players
• Digital cameras
• Notebook PCs

Manufacturers

The AP2121N-1.3TRE1 is manufactured by a number of companies including Anpec Electronics Corporation and Diodes Incorporated.

Datasheet

The AP2121N-1.3TRE1’s datasheet is publicly available online, which provides the device details and specifications. The datasheet also includes the electrical characteristics, output and input voltage, power dissipation, temperature characteristics, and all the associated protection circuits.

Working Principle

The AP2121N-1.3TRE1 is a linear voltage regulator, meaning that its output voltage is determined by an external capacitive divider connected across its output terminals. The voltage regulator has a 0.2V voltage drop between its input and output, meaning that the output voltage will always be 0.2V lower than the input voltage. The output voltage is also affected by the capacitive load on the output; the larger the load, the lower the output voltage.The AP2121N-1.3TRE1 is designed with a very low internal impedance, meaning that the output ripple is kept very low and that the power supply rejection ratio (PSRR) is also very good. The gradual decrease in the output voltage under load is also referred to as “line regulation”. The AP2121N-1.3TRE1 also features over-voltage protection, short-circuit protection, and temperature protection, ensuring the device is safe to use in low voltage application.

Conclusion

The AP2121N-1.3TRE1 voltage regulator is designed to provide precise, low noise, low power linear regulation for applications in the 1.2V to 5.0V output voltage range. The output voltage is adjustable using an external ceramic capacitor and the device has safety protection features for extra safety. The AP2121N-1.3TRE1 is usually used in portable devices, such as cell phones, PDAs, MP3/MP4/DVD players, digital cameras, and notebook PCs. The datasheet for the device is publicly available online, providing details and specifications of the AP2121N-1.3TRE1.

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