MP20249 1.2-3.3V High PSRR 200mA Linear Regulator MP20249 Rev1.0

MP20249 1.2-3.3V High PSRR 200mA Linear Regulator MP20249 Rev1.0

The MP20249 is a dual-channel, ultra-low noise, low dropout and high PSRR linear regulator.

Key Specifications

Features

• Input Voltage Range: 2.3V to 6.0V
• Two LDOs in a 1.0x1.5mm WLCSP Package
• Up to 200mA Output Current (Per Channel)
• Dual Enable Pins Control Each Output
• 16µVRMS Output Noise (100Hz-1kHz) Bandwidth with No Bypass Capacitor required
• High PSRR: 65dB @ 1kHz
• Low dropout: 60mV @ 150mA Load
• Stable with 1µF Ceramic Capacitor for Any Load (Per Channel)
• Very Fast Line and Load Transient Response
• Output Discharge Function

Typical Application Circuit

Applications

• Cellular Mobile Phones
• Digital Cameras
• Handheld and Battery-powered Equipment
• Wireless LAN

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