The MIC5225-1.8YM5 is a low-dropout (LDO) voltage regulator manufactured by Micrel (now Microchip Technology). It is designed to provide a stable 1.8V output voltage with high accuracy and low noise from an input voltage typically ranging from 2.5V to 5.5V. The device features low quiescent current and excellent transient response, making it suitable for battery-powered and portable applications.

Applications

• Portable Electronics
• Battery-Powered Devices
• Microprocessor Core Voltage Regulation
• Post-Regulation for Switching Supplies
• Noise-Sensitive Circuits
• PDAs, Smartphones, and Tablets
• Wireless Communication Devices

Features

• Fixed Output Voltage: 1.8V
• Low Dropout Voltage: Typically 250mV at 150mA
• Low Quiescent Current: Typically 4μA
• High Output Accuracy: ±2% over Temperature
• Stable with Ceramic Output Capacitors
• Current Limiting and Thermal Shutdown Protection
• Small SOT-23-5 Package

Benefits

• Extended Battery Life: Low quiescent current minimizes power consumption in standby mode.
• Stable Output Voltage: High accuracy ensures reliable performance of sensitive circuits.
• Improved Noise Performance: Low noise output reduces interference in analog and digital systems.
• Robust Protection: Current limiting and thermal shutdown protect the regulator and the load from damage.
• Simplified Design: Stable with ceramic capacitors reduces component count and cost.
• Compact Footprint: Small SOT-23-5 package saves board space.

Additional Details

The MIC5225-1.8YM5 is designed to provide a stable and reliable 1.8V power supply for a variety of applications. The low dropout voltage allows the regulator to operate with a small difference between the input and output voltages, maximizing battery life. The device is stable with ceramic output capacitors, which are commonly used in modern electronic devices due to their low ESR and small size. The current limiting and thermal shutdown features protect the regulator and the load from overcurrent and overheating conditions. The small SOT-23-5 package makes it easy to integrate the regulator into space-constrained designs. The device is commonly used to power microprocessors, memory devices, and other sensitive components in portable electronic devices.