MCP1702T-3302E/CB

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Introduction to MCP1702T-3302E/CBMCP1702T-3302E/CB is an Integrated 800mA / 1.2A LDO for palm PCs, Bluetooth, and Power over Ethernet (PoE) applications from Microchip Technology. It is a low dropout linear voltage regulator that has a wide input voltage range from 2.5V to 5.5V, and provides a low output voltage from 0.6V to 3.3V with a typical 0.3V dropout voltage and a maximum of 0.8V at 1.2A output. The MCP1702 also segments for selecting the output current level. The device also features low power consumption, low quiescent current, low output noise, and an integrated low ESR output capacitor.Application FieldThe MCP1702T-3302E/CB is primarily used in power over Ethernet (PoE) applications, such as powering cameras, access points or VoIP phones. Other application fields also include Portable Consumer Electronics, Communications and Networking Equipment, Wireless and LAN Modems, Bluetooth/IEEE 802.15, industrial power supplies, IoT and smart energy applications.The device has a low noise operation and is suitable for powering sensitive circuits like receivers or analog components. It can be used in circuits with high voltage requirements, and provide the necessary power to ensure the system stability and accuracy by keeping the output voltage within a tight tolerance. This makes the MCP1702 ideal for application fields that need high performance and reliability, such as medical and automotive devices.Working PrincipleThe MCP1702T-3302E/CB is a low dropout linear regulator with a wide operating temperature range and a high junction temperature rating. It regulates an input voltage from 2.5V to 5.5V to an output voltage from 0.6V to 3.3V. Output current is adjustable from 0.8A to 1.2A.The voltage regulator operates in two stages. The first stage is a voltage reference that converts the input voltage to a stable voltage reference. The second stage is a current regulator, which controls the output current. The input voltage is applied to the MCP1702 input terminals, where a low resistor divider provides the reference voltage. The voltage reference is then compared to a voltage feedback network, which is connected to the output. If the voltage level of the output goes above or below the reference level, the output current is regulated by the current regulator to maintain a stable output voltage. The MCP1702 also contains a protection circuit that keeps the output maintained in case the output short circuits.ConclusionThe MCP1702T-3302E/CB from Microchip Technology is a low dropout linear voltage regulator with a wide input voltage range, low power consumption, low quiescent current, low output noise, and an integrated low ESR output capacitor. It is primarily used in power over Ethernet (PoE) applications, such as powering cameras, access points or VoIP phones, as well as in portable consumer electronics, communications and networking equipment, and wireless and LAN modems. It is also suitable for sensitive circuits and high voltage applications, such as medical and automotive devices. The device operates by first converting the input voltage to a stable voltage reference, and then compares the voltage reference to a voltage feedback network connected to the output. The current regulator maintains a stable output voltage level by regulating the output current if the output voltage level goes above or below the reference level. Overall, the MCP1702T-3302E/CB is an integrated, low dropout, linear voltage regulator suitable for many application fields due to its wide input voltage range, low power consumption, and low noise operation.

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