DESCRIPTION

The UTC LD1985 is a 150mA fixed output voltage regulator.

The ultra low drop voltage and the low quiescent current make

them particularly suitable for low noise, low power applications,

and in battery powered systems. In sleep mode quiescent current

is less than 1μA when INHIBIT pin is pulled low. Shutdown Logic

Control Function is available on pin 3 (TTL compatible). 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.

An external capacitor, CBYP=10nF, connected between bypass

pin and GND reduce the noise to 30μVrms.

Typical application is in cellular phone, palmtop laptop

computer, personal digital assistant (PDA), personal stereo,

camcorder and camera.

 FEATURES

* Very Low Dropout Voltage (280mV at 150mA and 7mV at 1mA

Load)

* Very Low Quiescent Current

* Output Current up to 150mA

* Logic Controlled Electronic Shutdown

* Output Voltage of 1.5, 1.8, 2.5, 2.8, 2.85, 3, 3.1, 3.2, 3.3, 3.5,

3.6, 3.8, 4, 4.7, 5V

* Internal Current and Thermal Limit

* Low Output Noise Voltage 30μVrms