Low noise, low difference linear voltage regulator

The REG102 is a low noise, low difference linear voltage regulator series with low grounded pin current. Available in sot235-5, SOT223-5, and SO-8 packages. The new DMOS topology features significant improvements over previous designs, including a low voltage drop (only 150mV at full load) and better transient performance.

In addition, no output capacitance is required for stability, unlike traditional low voltage drop regulators, which are difficult to compensate for and require expensive low ESR capacitors greater than 1μF. Typical ground pin current is only 600 μA (IOUT = 250mA) and drops to 10nA when disabled. Unlike regulators with PNP-pass devices, the static current remains relatively constant under overload changes and power-off conditions.

The REG102 has a very low output noise (typically 28 μVrms at VOUT = 3.3V, CNR = 0.01μF), making it ideal for portable communication devices. High output voltage accuracy is achieved by on-chip fine tuning. Maintain accuracy under temperature, line and load changes.

Key parameters are tested in the specified temperature range (-40°C to +85°C). REG102 Well protected - Internal circuit provides current limitation and protects load from damage; In addition, the thermal protection circuit can prevent the chip from being damaged by excessive temperature.

Features

New dmos topology:
● Ultra-low drop voltage:
-   150mV typp, 250mA
-   No output capacitance is required for stabilization
-   Fast transient response
● Extremely low noise :28µVrms
● High precision :±1.5% max
● High efficiency:
-   IGND = 600 μA, IOUT = 250mA
-   Not Enabled: IGND = 0.01µA
●2.5v, 2.8v, 2.85v, 3.0v, 3.3v, 5.0v Adjustable output version
● Other output voltages are available request
● Folding current limit
● Thermal protection
● Small surface mount package:
-   SOT223-5, SOT223-5 and SO-8

Applications

● Portable communication equipment
● Battery powered devices
● Personal Digital Assistant
● Modem
● Bar code scanner
● Backup power supply