REG102NA-2.8/250G4 Description
A family of low-noise, low-dropout linear regulators with low ground pin current is the REG102NA-2.8/250G4. In comparison to earlier designs, the new DMOS topology offers substantial improvements, such as lower dropout voltage (at 150mV typ at full load), and better transient performance. Furthermore, unlike conventional low-dropout regulators that are difficult to correct for and need expensive low ESR capacitors higher than 1μF, no output capacitor is necessary for stability.
When disabled, the typical ground pin current lowers to 10nA from 600A (at IOUT = 250mA). Quiescent current, in contrast to regulators with PNP pass devices, remains largely constant over variations in load and dropout situations.
REG102NA-2.8/250G4 Features
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
Thermal protection
Small surface-mount packages: sot23-5, sot223-5, and so-8
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 = 250mA
Not Enabled: IGND = 0.01μA
REG102NA-2.8/250G4 Applications
Modems
Bar-code scanners
Backup power supplies
Portable communication devices
Battery-powered equipment
Personal digital assistants
