MP8903 2.7-6.5V Low Dropout 150mA Linear Regulator QFN8

MP8903 2.7-6.5V Low Dropout 150mA Linear Regulator QFN8

The MP8903 is a 150mA low-dropout linear regulator that can operate from 2.7V to 6.5V input.

Key Specifications

Features

• 2.7V to 6.5V Input Voltage Range
• Fixed Output Voltage Options of 2.5V, 2.85V or 3.3V
• Adjustable Output Voltage from 1.25V to 5V using an External Resistor Divider
• Low 100mV Dropout at 100mA Output
• 2% Accurate Output Voltage
• Stable With Low-ESR Output Capacitors
• Thermal Protection
• Available in Tiny QFN8 (2x2mm) and TSOT23-5 Packages

Typical Application Circuit

Applications

• 802.11 PC Cards
• Mobile Handset PLL Power

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