REG103FA-A/500G3 DESCRIPTION
The REG103 is a family of low-noise, low-dropout, linearregulators with low ground pin current. Its new DMOStopology provides significant improvement over previousdesigns, including low-dropout voltage (only 115mV typ atfull load), and better transient performance. In addition, nooutput capacitor is required for stability, unlike conventionallow-dropout regulators that are difficult to compensate andrequire expensive low ESR capacitors greater than 1μF.
REG103FA-A/500G3 FEATURES
● NEW DMOS TOPOLOGY:
Ultra Low Dropout Voltage:
115mV Typ at 500mA and 3.3V Output
Output Capacitor NOT Required for Stability
● FAST TRANSIENT RESPONSE
● VERY LOW NOISE: 33μVrms
● HIGH ACCURACY: ±2% max
● HIGH EFFICIENCY:
IGND = 1mA at IOUT = 500mA
Not Enabled: IGND = 0.5μA
● 2.5V, 2.7V, 3.0V, 3.3V, 5.0V, AND ADJUSTABLE
OUTPUT VERSIONS
● FOLDBACK CURRENT LIMIT
● THERMAL PROTECTION
● OUTPUT VOLTAGE ERROR INDICATOR(1)
● SMALL SURFACE-MOUNT PACKAGES:
SOT223-5, DDPAK-5, SO-8
REG103FA-A/500G3 APPLICATIONS
● PORTABLE COMMUNICATION DEVICES
● BATTERY-POWERED EQUIPMENT
● PERSONAL DIGITAL ASSISTANTS
● MODEMS
● BAR-CODE SCANNERS
● BACKUP POWER SUPPLIES
