AP7315D-23FS4-7B

Current - Output:	150mA
Supplier Device Package:	X2-DFN1010-4
Package / Case:	4-XDFN Exposed Pad
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):	0.38V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.3V
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

PMIC stands for Power Management Integrated Circuit. PMICs are a specialized type of integrated circuit designed to handle and monitor power utilization in hardware systems. Among various types of PMICs, Voltage Regulators are often the most prominent component, and Linear voltage regulators are the most basic ones. AP7315D-23FS4-7B is an example of linear voltage regulator, producing a fixed output voltage under diverse load conditions. This article will further discuss the application field and working principle of AP7315D-23FS4-7B.

Basic Overview

AP7315D-23FS4-7B is a low dropout (LDO) linear voltage regulator. It is capable of providing output voltage from 0.8V to 5.0V with a minimum 250mA load current. The switching frequency is 4.2MHz, making it suitable for multimedia and digital home applications. AP7315D-23FS4-7B also offers protection features such as Over Temperature Protection (OTP), Over Current Protection (OCP), Over Voltage Protection (OVP) and Short Circuit Protection (SCP).

Application fields

AP7315D-23FS4-7B is ideal for low-power applications. It is used in LCD displays, digital cameras, cell phones, digital audio players and camcorders. In addition, it is commonly used in storage devices and optical disc recorders. This voltage regulator allows the user to optimize output voltage with low noise, current protection and small package size.

Working Principle

AP7315D-23FS4-7B is a linear voltage regulator working on the principle of voltage division. This voltage regulator has an integrated power transistor, which is connected between the input voltage source and the output voltage. The power transistor is controlled by a feedback circuit, which adjusts the resistance value of the transistor so that the output voltage is kept constant. The feedback circuit senses the output voltage, and then adjusts the gate voltage of the power transistor in order to maintain the output voltage constant. The gate voltage is compared to a fixed reference voltage and an error voltage is generated. This error voltage is then used to adjust the resistance of the power transistor in order to adjust the output voltage so that it is kept constant.

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