MP20041 1.2-3.6V High PSRR 300mA Linear Regulator QFN8

MP20041 1.2-3.6V High PSRR 300mA Linear Regulator QFN8

The MP20041 is a dual-channel, micropower, ultra low noise, low dropout and high PSRR linear regulator.

Key Specifications

Features

• Wide Operating Voltage Ranges: 2.5V to 6V
• Two LDOs in a 2mmx2mm TQFN8 Package
• Up to 300mA Output Current (Per Channel)
• Dual Enable Pins Control Each Output
• 72dB PSRR at 10kHz
• 11μVRMS Ultra Low Noise Output with No Noise Bypass Capacitor Required
• 73mV Dropout at 100mA Load
• Very Fast Line/Load Transient Responses with Small Input/Output Capacitor
• Current Limit and Thermal Protection

Typical Application Circuit

Applications

• Cellular Phones
• Battery-powered Equipment
• Laptop, Notebook, and Palmtop Computers
• Hand-held Equipment

Design Notes

• Dissipation is (VIN − VOUT) × IOUT. Check it against the package thermal resistance at the real ambient temperature before committing to the full rated current.
• Some low-noise LDOs require a minimum output capacitor ESR for loop stability — read the stability section before substituting a ceramic part.
• Add a bypass capacitor on the reference pin where provided; it sets the output noise floor.
• PSRR falls as the input-to-output differential shrinks, so headroom matters at low VIN.

Common Questions