REG103FA-3.3/500G3 Description
The REG103FA-3.3/500G3 is a low-noise, low-dropout, linear regulator with a low ground pin current. Its new DMOS topology provides a significant improvement over previous designs, including low-dropout voltage (only 115mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional low-dropout regulators that are difficult to compensate for and require expensive low ESR capacitors greater than 1μF.
REG103FA-3.3/500G3 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 lout= 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-3.3/500G3 Applications
Portable communication devices
Battery-powered equipment
Personal digital assistants
Modems
Bar-code scanners
