AP7315-32SA-7

Current - Output:	150mA
Supplier Device Package:	SOT-23
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:	75dB (1kHz)
Current - Supply (Max):	100µA
Current - Quiescent (Iq):	60µA
Series:	--
Voltage Dropout (Max):	0.29V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.2V
Voltage - Input (Max):	5.25V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

AP7315-32SA-7 is a high performance, low quiescent current, and low noise linear voltage regulator. It is designed to deliver an optimal 3.3V/500mA output current. It features an adjustable/fixed 3.3V output voltage and high PSRR, fast transient response, and output current limiting protections. This advanced regulator boasts many features that make it ideal for a variety of consumer and industrial applications.

Application field

AP7315-32SA-7 is the perfect choice for applications where a 3.3V voltage output is required. It offers excellent load/line transient response and excellent output voltage ripple rejection, which is ideal for noise sensitive applications. Additionally, it features protective features such as current limiting, thermal shutdown, and over voltage protection, making it suitable for various safety critical applications.The accurate and stable 3.3 V output of this regulator makes it ideal for systems with an embedded microcontroller or any other processor based applications. It is especially suited for systems that require power to remain “always on”, such as portable medical devices, automotive electronics, battery management systems, and home appliances. Additionally, this advanced regulator is well suited for powering LCD, LED and other visual display systems and robotics applications.

Working Principle

The AP7315-32SA-7 linear voltage regulator works on the premise of comparing a reference voltage to the input voltage, allowing for the difference to be regulated to the desired output level. To achieve this, the regulator features an integrated error amplifier circuit which reads the voltage between the Input pin (VIN) and the Ground pin (GND). The error amplifier compares the reference voltage (REF) and the voltage on the output pin (VOUT) and adjusts the gate voltage of the pass transistor accordingly. This adjustment causes the output voltage to be regulated.The AP7315-32SA-7 provides additional features to help optimize performance, such as current limiting, thermal shutdown, and over voltage protection. The rGS pin monitors the gate voltage of the pass transistor, which is used to limit the maximum current of the pass transistor. If the current reaches its limit, then the voltage on the rGS pin is increased, thus limiting the pass transistor’s current. The AP7315-32SA-7 also incorporates an over-temperature protection circuit that monitors the die temperature of the regulator. If the die temperature exceeds a critical temperature, then the over-temperature protection circuit will shut down the regulator. Finally, the over voltage protection prevents overloads caused by input voltage supply disruptions.

Conclusion

The AP7315-32SA-7 linear voltage regulator offers high performance at low quiescent current and low noise levels, making it an excellent choice for a variety of consumer and industrial applications. It is especially well suited for powering embedded microcontroller systems, portable medical devices, automotive electronics, battery management systems, home appliances, LCD and LED displays, robotics applications, and more. Additionally, this advanced regulator features integrated safety features such as current limiting, thermal shutdown, and over voltage protection, providing protection under extreme conditions.

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