DESCRIPTION

The LDS3985 provides up to 300mA, from 2.5V to 6V input voltage. It is stable with ceramic and high quality tantalum capacitor. The ultra low drop-voltage, low quiescent current and low noise makes it suitable for low power applications and in battery powered systems. Regulator ground current increases only slightly in dropout, further prolonging the battery life. Shutdown Logic Control function is available, this means that when the device is used as local regulator, it is possible to put a part of the board in standby, decreasing the total power consumption. Typical applications are in mobile phone and similar battery powered wireless systems, portable information appliances.

■ INPUT VOLTAGE FROM 2.5V TO 6V

■ STABLE WITH LOW ESR CERAMIC CAPACITORS

■ ULTRA LOW DROPOUT VOLTAGE

(150mV TYP. AT 300mA LOAD, 0.4mV TYP. AT 1mA LOAD)

■ VERY LOW QUIESCENT CURRENT

(85µA TYP. AT NO LOAD, 200µA TYP. AT 300mA LOAD; MAX 1.5µA IN OFF MODE)

■ GUARANTEED OUTPUT CURRENT UP TO 300mA

■ WIDE RANGE OF OUTPUT VOLTAGE:

1.25V; 1.35; 1.5V; 1.8V; 2V; 2.1V; 2.2V; 2.5V;

2.6V; 2.7V; 2.8V; 2.85V; 2.9V; 3V; 3.1V; 3.2V;

3.3V; 4.7V

■ FAST TURN-ON TIME: TYP. 240µs

[CO=2.2µF, CBYP= 33nF AND IO=1mA]

■ LOGIC-CONTROLLED ELECTRONIC SHUTDOWN

■ INTERNAL CURRENT AND THERMAL LIMIT

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

■ S.V.R. OF 55dB AT 1KHz, 50dB AT 10KHz

■ TEMPERATURE RANGE: -40°C TO 125°C