DESCRIPTION

The SS6642G 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, 3.7V, 4.5V or 5V. The SS6642G starts up from less than 0.9V input with 1mA load. A Pulse Frequency Modulation scheme optimizes performance for applications with light output loading and low input voltages. The output ripple and noise are lower when compared with circuits operating in PSM mode.

FEATURES

  A 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, 3.7V, 4.5V and 5V.

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

APPLICATIONS

  Pagers.

  Cameras.

  Wireless Microphones.

  Pocket Organizers.

  Battery Backup Suppliers.

  Portable Instruments.