DEVICE DESCRIPTION

The ZLDO Series low dropout linear regulators operate with an exceptionally low dropout voltage, typically only 30mV with a load current of 100mA. The regulator series features output voltages in the range 2.7 to 18 volts, this device provides an output voltage of 4.85 volts.

The ZLDO485 consumes a typical quiescent current of only 1mA and is rated to supply load currents up to 300mA. A battery low flag is available to indicate potential power fail situations. If the input voltage falls to within 200mV of the regulated output voltage then the error output pulls low. The device also features an active high disable control. Once disabled the ZLDO quiescent current falls to typically 11µA.

FEATURES

• Very low dropout voltage

• 6mV dropout at 10mA output

• 30mV dropout at 100mA output

• 100mV dropout at 300mA output

• 4.85 volt fixed output

• Other voltages available

• Low quiescent current

• 1mA quiescent (typ) at 300mA output

• Low battery flag

• Shutdown control

• Surface mount package

APPLICATIONS

• Battery powered devices

• Portable instruments

• Portable communications

• Laptop/Palmtop computers

• Electronic organisers