MIC5265-1.8YD5

MIC5265-1.8YD5 Application Field and Working Principle

The MIC5265-1.8YD5 is an advanced voltage regulator IC with an integrated low drop-out regulator (LDO) which is used to regulate the output voltage in a wide range of applications. It is a three-terminal device, employing a fixed output voltage with adjustable current limit and over-temperature shut-down protection, as well as other features like soft switch/start and reverse current protection. It is part of the new range of voltage control ICs from Microchip Technology, Inc.

The device features a low drop-out voltage, adjustable current limit and a wide operational range, along with other features such as thermal protection and reverse current protection. The output voltage is settings via an externally applied voltage, which is adjusted via the current limit adjustment pin. This allows the output voltage to be adjusted in a wide range to meet the required application specification.

The MIC5265-1.8YD5 is designed to provide excellent operation in both steps-down and steps-up regulation, making it suitable for applications that require both low and high output voltages. The device has a wide input voltage range, from 3.9V to 36V, allowing the use of either a single battery cell or multiple battery cells. The current limit is adjustable from 1mA to 1500mA, allowing the device to be used in a variety of applications requiring different output current levels.

In applications requiring higher power levels, the MIC5265-1.8YD5 can be used in conjunction with an external power MOSFET. This allows the device to supply up to 10A at the rated voltage of up to 36V. The output voltage is accurate to within ±1.5% over the operating temperature range of -40°C to +85°C. The MIC5265-1.8YD5 is available in the industry standard SOT23-5 package.

The MIC5265-1.8YD5 provides excellent power regulation performance, making it ideal for a wide range of applications such as notebook computers, medical equipment, automotive electronics, consumer electronics, and industrial systems. The device is also suitable for battery-powered equipment such as handheld remote controls and cordless phones.

Working Principle of the MIC5265-1.8YD5

The MIC5265-1.8YD5 uses a two-terminal operational amplifier configuration to regulate the output voltage. It is a linear voltage regulator, consisting of two isolation resistors and a P-channel MOSFET. The resistors create a reference voltage which ensures that the output voltage remains constant regardless of the input voltage. The P-channel MOSFET is then used to control the output voltage by varying the resistance between the input and output terminals.

When the output voltage falls below the reference voltage, the P-channel MOSFET is switched off. This reduces the resistance between the input and output terminals, increasing the current into the output. As the output voltage rises, the MOSFET is slowly switched back on, reducing the current and maintaining the desired output voltage.

The MIC5265-1.8YD5 also has a current limit feature which helps to protect the output from current overloads. This feature is adjustable via an external resistor, so that the device can be set up to limit the current in the event of an overload. This helps to prevent damage to both the output circuit and the device itself.

The MIC5265-1.8YD5 features a wide input voltage range, adjustable current limit, low drop-out voltage, and reverse current protection. It is suitable for a wide range of regulated power applications and is a popular choice for notebook computers, medical equipment, automotive electronics, consumer electronics, and industrial systems.