General Description

The MIC5281 high-performance linear regulator offers a very-wide input operating voltage range, up to 120V DC, and supplies an output current of up to 25mA.
Ideal for high input voltage applications such as industrial and telecom, the MIC5281 offers ±3% initial accuracy, extremely high-power supply rejection ratio (>90db) and ultra-low quiescent current of 6µA. The MIC5281 is optimized for high-voltage line transients, making it ideal
for harsh environment applications.
The MIC5281 is offered in both fixed output voltage (3.3V/5.0V) and adjustable output voltage (1.27V to 5.5V) options.
The MIC5281 operates over a −40ºC to +125ºC temperature range and is available in lead-free, RoHS compliant, 8-pin ePad MSOP and 8-pin MSOP packages.

Features

• Wide input voltage range: 6V to 120V DC
• Ultra-low quiescent current: 6µA
• 25mA guaranteed output current
• Adjustable output from 1.27V to 5.5V
• Withstands up to +120V DC at the input
• Stable with ceramic capacitors
•Ultra-high PSRR >90dB
• Ultra-high line rejection (load dump)
• High output accuracy:
– ±3% initial accuracy
•Thermal-shutdown and current-limit protection
• Thermally-efficient, 8-pin MSOP and 8-pin ePad MSOP packages

Applications

• Industrial applications
• Remote keyless entry power supply
•Telecom applications
• Off-line power supplies