Maxim

Description

DATASHEET The MAX778 evaluation kit (EV kit) provides a regulated. 3.0V or 3.3V output voltage while operating from input volt- ages as low as 1.0V. The board is ideally The MAX777/ MAX778 /MAX779 are pulse-skipping, step-up dc-dc converters that accept input voltages as low as 1V. Each derives more power from a single- high-intensity LEDs from a single cell without rectifiers or filter capacitors. DC-DC. CONTROL. LX. OUT. PGND. AGND. SEL. SHDN. IN. ILIM. IC1. MAX778 . L1. MAX778 . Figure 8. With a few external capacitors, one IC boosts a 2-cell or 3- cell input to 5V, and delivers 50mA (for 3V inputs) with only 75 A of quiescent MAX777 5V MAX778 . 3.0V 3.3V MAX779 . 2.5V 6V . 10mA .