General Description

The EM1109 performs ultra- low drop voltage,

high power supply rejection ratio (PSRR), fast

response, low noise linear regulator, and designed

to continuously deliver up to 1A output current.

The EM1109 has wide adjustable output voltage

range and high output accuracy to 1.5%.

No by-pass capacitor is needed for this device

and only 4.7uF ceramic capacitor is required for

stability in any loading conditions. It reduces the

amount of board space necessary for power

applications.

The other features include soft start, current

limit protection, Power-On-Reset function, and

over temperature protection. The EM1109 is

available in DFN3X3-08L package.

Features

? Ultra Fast Response in Line/Load Transient

? Wide VIN Range from 2.5V to 5.5V

? Fixed Output Voltage from 1V to 3.3V

? Ultra Low Dropout Voltage: 450mV @1A

? Low Shutdown Current < 1uA

? Only 4.7uF Ceramic Capacitor required for

stability

? Over Temperature Protection

? Current Limit Protection

? RoHS Compliant and 100% Lead (Pb)-Free

Applications

? Cellular Handsets

? Battery-Powered Equipment

? Laptop, Palmtops, Notebook Computers

? Hand-Held Instruments

? PCMCIA Cards

? Portable Information Applications