DESCRIPTION

The SS6638G is a high-efficiency step-up DC/DC converter for applications  using 1 to  4 NiMH

battery cells. Only three external components are required to deliver a fixed output voltage of 2.7V, 3.0V, 3.3V, 4.5V or 5V. The SS6638Gstarts up from less than 0.9V input with 1mA load. A Pulse Frequency Modulation scheme brings optimized performance  for applications  with light output loading and low input voltages. The output ripple and noise are lower compared with circuits operating in PSM mode.

FATURES

Guaranteed start-up from less than 0.9 V.

High efficiency.

Low quiescent current.

Fewer external components needed.

Low ripple and low noise.

Fixed output voltage: 2.7V, 3.0V, 3.3V, 4.5V and 5V.

Space saving packages: SOT-23, SOT-89 and TO-92.

Pb-free, RoHS compliant.

APPLICATIONS

Pagers.

Cameras.

Wireless Microphones.

Pocket Organizers.

Battery Backup Supplies.

Portable Instruments.