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DESCRIPTION

The LD3985 provides up to 150mA, from 2.5V to 6V input voltage. The ultra low drop-voltage, low quiescent current and low noise make it suitable for low power applications and in battery powered systems. Regulator ground current increases only slightly in dropout, further prolonging the battery life. Power supply rejection is better than 60 dB at low frequencies and starts to roll off at 10KHz. High power supply rejection is maintained down to low input voltage levels common to battery operated circuits.

■ INPUT VOLTAGE FROM 2.5V TO 6V

■ STABLE WITH LOW ESR CERAMIC CAPACITORS

■ ULTRA LOW DROPOUT VOLTAGE (100mV TYP. AT 150mA LOAD, 0.4mV TYP. AT 1mA LOAD)

■ VERY LOW QUIESCENT CURRENT (85?A TYP. AT NO LOAD, 170?A TYP. AT 150mA LOAD; MAX 1.5?A IN OFF MODE)

■ GUARANTEED OUTPUT CURRENT UP TO 150mA

■ WIDE RANGE OF OUTPUT VOLTAGE: 1.2V; 1.22V; 1.25V; 1.35V; 1.5V; 1.8V; 2V; 2.1V; 2.2V; 2.4V; 2.5V; 2.6V; 2.7V; 2.8V; 2.85V; 2.9V; 3V; 3.1V; 3.2V; 3.3V; 4.7V; 5V

■ FAST TURN-ON TIME: TYP. 200?s [CO=1?F, CBYP= 10nF AND IO=1mA]

■ LOGIC-CONTROLLED ELECTRONIC SHUTDOWN

■ INTERNAL CURRENT AND THERMAL LIMIT

■ OUTPUT LOW NOISE VOLTAGE 30?VRMS OVER 10Hz to 100KHz

■ S.V.R. OF 60dB AT 1KHz, 50dB AT 10KHz

■ TEMPERATURE RANGE: -40°C TO 125°C