The S-8430AFD5Z is a chopper-type DC/DC converter made using the CMOS process. It automatically steps the voltage up and down according to the input voltage. When the input voltage is higher than the output voltage, the S-8430AFD5Z operates as a series regulator. When the input voltage is lower than the output voltage, it operates as a combination of a step-up switching regulator and a series regulator. The output voltage for normal operation can be selected from either 5V or 3V and the output level during during shutdown can be selected from either the Vss level or the input voltage level.
Low current consumption
Low voltage operation
Output voltage: 5V or 3V
Built-in CR oscillation circuit
Few external parts because of built-in Schottky diode
Other battery driven equipment
SOIC-8 package. Manufactured by Seiko.