Monolithic 1A Step-Down Regulator with Low Quiescent Current

The EL7531 is a synchronous, integrated FET 1A step-down regulator with internal compensation. It operates with an input voltage range from 2.5V to 5.5V, which accommodates supplies of 3.3V, 5V, or a Li-Ion battery source. The output can be externally set from 0.8V to VIN with a resistive divider.

Features

• Less than 0.15 in2 (0.97 cm2) footprint for the complete 1A converter

• Components on one side of PCB

• Max height 1.1mm MSOP10

• Power-Good (PG) output

• Internally-compensated voltage mode controller

• Up to 94 efficiency

• <1µA shut-down current

• 120µA quiescent current

• Overcurrent and over-temperature protection

• External synchronizable up to 12MHz

• Pb-Free plus anneal available (RoHS compliant)

Applications

• PDA and pocket PC computers

• Bar code readers

• Cellular phones

• Portable test equipment

• Li-Ion battery powered devices

• Small form factor (SFP) modules