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PMIC - Voltage Regulators - Linear

The MIC29751-5.0WWT is a 5.0V low dropout (LDO) linear regulator, based on an advanced bipolar CMOS (BCMOS) process. With an extended operating temperature range, low dropout voltage, and low ground current, it enables reliable power supplies even in extreme operating conditions. Its ultra-small package size of SOT-223 and SOT-23-5 makes it ideal for space-constrained applications requiring high-performance voltage regulation and minimal power dissipation.

Applications

The MIC29751-5.0WWT offers high performance for various applications:

• SmartPhone, Tablet, and other mobile devices
• Automotive
• Industrial
• Home appliance and white goods
• Network, Communications, Servers, and Computing
• Consumer Electronics

Features

• 5.0V Output Voltage
• Ultra-Low Dropout Voltage: 55mV (Typ)
• Ultra-Low Quiescent Current: 25µA (Typ)
• High PSRR: 73dB (Typ)
• High Ripple Rejection: 70dB (Typ)
• Direct Compatible With 0.1µF and 0.01µF Ceramic Output Capacitors
• Thermal Shutdown Protection
• SOT-223 and SOT-23-5C Packages
• -40°C to +125°C Operating Temperature Range

Working Principle

The MIC29751-5.0WWT employs a three-terminal linear regulator with an output voltage of 5.0V and includes a current limit, rather than thermal shutdown, protection. The regulator can be used in space-constrained applications where a supervisory voltage is necessary and where input power is limited.

The MIC29751-5.0WWT is a low-dropout regulator that uses an advanced bipolar CMOS (BCMOS) process. This process allows it to provide a high-speed response at a low dropout voltage, and its low ground current design enables power supplies to consume less current, especially when used as a low noise regulator for digital logic. It also features low quiescent current, making it ideal for use in portable battery-powered applications where low current consumption is critical for longer battery life.

The MIC29751-5.0WWT has an on-chip voltage reference, a Current Limit Amplifier, an Enable Control Circuit and an output stage consisting of the P-channel regulator MOSFET. A resistor divider circuit sets the reference voltage, while the enable control circuit ensures that the output voltage of the regulator is shut down when not desired. The current limit amplifier monitors the output current to prevent excessive current due to fault conditions. In the event of an overload condition, the output current is limited by the current limit amplifier and the output voltage is allowed to drop.

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