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MIC5247-1.8YM5-TR Application Field and Working Principle

The MIC5247-1.8YM5-TR is a low-voltage, low-dropout (LDO) linear voltage regulator. It is designed to provide an adjustable output voltage ranging from 0.8V to 5V and low quiescent current. This device is stable with small ceramic output capacitors, simplifying the design of the system. The MIC5247-1.8YM5-TR is housed in a 5-pin WSON package for easy installation and is ideal for application in portable electronic products.

Applications

• Mobile phones, tablets and other handheld devices
• White goods
• Smart watches and wearables
• Medical electronics
• Battery-powered devices
• Industrial and automotive electronics

Features

• Wide input voltage range: 2.3V to 8.5V
• Output voltage adjustable from 0.8V to 5V
• Low quiescent current: 7.8mA typical at 5V output, only 1.5mA typical at 1.8V output.
• High power supply rejection ratio (PSRR): 72dB @ 1kHz
• Dropout voltage at 200mA load: 250mV typical
• Stable with small ceramic output capacitors

Working Principle

The MIC5247-1.8YM5-TR utilizes an innovative design to offer low dropout, low quiescent current, and low voltage output. The device integrates a PMOSFET, a reference, and a control module. When there is no load, the PMOSFET is off, leading to a high output impedance. When the load is applied, the PMOSFET is turned on and the output voltage can be maintained at 1.8V (typical). The MIC5247-1.8YM5-TR also has POR protection and OCP, OTP, and Brownout protection to prevent possible device damage.

The MIC5247-1.8YM5-TR provides a low dropout voltage performance, allowing the device to maintain a 1.8V output even at a low input voltage. This device also features low quiescent current, allowing it to be used in battery-powered applications. In addition, this device can stabilize with a variety of output capacitors, simplifying the design process.

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