The MIC5203-4.7YM4 is a low dropout (LDO) voltage regulator from Micrel (now Microchip Technology). It's designed to deliver a stable and accurate 4.7V output voltage while maintaining a low dropout voltage. This makes it suitable for applications where the input voltage is close to the output voltage and where efficient power conversion is crucial.

Applications

• Battery-powered portable devices
• Cellular phones
• PDAs and handheld computers
• Post-regulation for switching power supplies
• General-purpose linear regulation

Features

• Low dropout voltage: 165 mV @ 150 mA
• High output accuracy: ±2%
• Low quiescent current: 35 μA typical
• Stable with ceramic output capacitors
• Current and thermal limiting
• Reverse battery protection
• Fixed output voltage: 4.7V

Benefits

• Extends battery life in portable devices due to low dropout and quiescent current
• Provides a stable and accurate voltage supply for sensitive electronics
• Simplified circuit design due to stability with ceramic capacitors
• Protection against overcurrent and overtemperature conditions
• Prevents damage from reverse battery connection
• Small package size saves board space

Additional Details

The MIC5203-4.7YM4 features a very low dropout voltage of just 165mV at 150mA load current, maximizing efficiency when the input voltage is close to the desired output voltage. It has a high output voltage accuracy of ±2%, ensuring reliable performance. The low quiescent current of 35μA further extends battery life in portable applications. This regulator is stable with ceramic output capacitors, which are preferred for their low ESR and small size. It integrates current and thermal limiting to protect the device from overload conditions. Reverse battery protection prevents damage if the battery is accidentally connected with reverse polarity. The YM4 package is a small 4-pin package. The input voltage range is typically up to 16V. The operating temperature range is -40°C to +125°C.