The REG102 is a family of low-noise, low-dropout linearregulators with low ground pin current. The new DMOStopology provides significant improvement over previousdesigns, including low-dropout voltage (only 150mV 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.
Typical ground pin current is only 600µA (at IOUT = 250mA)and drops to 10nA when not enabled. Unlike regulators withPNP pass devices, quiescent current remains relatively constantover load variations and under dropout conditions.
The REG102 has very low output noise (typically 28µVrmsfor VOUT = 3.3V with CNR = 0.01µF), making it ideal for usein portable communications equipment. On-chip trimmingresults in high output voltage accuracy. Accuracy is maintainedover temperature, line, and load variations. Key parametersare tested over the specified temperature range(–40°C to +85°C).
The REG102 is well protected—internal circuitry provides acurrent limit that protects the load from damage; furthermore,thermal protection circuitry keeps the chip from being damagedby excessive temperature. The REG102 is available inSOT23-5, SOT223-5, and SO-8 packages.
NEW DMOS TOPOLOGY: Ultra Low Dropout Voltage: 150mV typ at 250mA Output Capacitor not Required for Stability
FAST TRANSIENT RESPONSE
VERY LOW NOISE: 28µVrms
HIGH ACCURACY: ±1.5% max
HIGH EFFICIENCY:IGND = 600µA at IOUT = 250mANot Enabled: IGND = 0.01µA
2.5V, 2.8V, 2.85V, 3.0V, 3.3V, AND 5.0V ADJUSTABLE OUTPUT VERSIONS
OTHER OUTPUT VOLTAGES AVAILABLE UPON REQUEST
FOLDBACK CURRENT LIMIT
SMALL SURFACE-MOUNT PACKAGES: SOT23-5, SOT223-5, and SO-8