Datasheet

L6920DC Pin settings
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1 Pin settings
1.1 Pin connection
Figure 1. Pin connection (top view)
1.2 Pin description
Table 1. Pin description
N° Type Description
1 FB Output voltage selector. Connect FB to GND for Vout=5V or to OUT for
Vout=3.3V. Connect FB to an external resistor divider for adjustable
output voltage
2 LBI Battery low voltage detector input. The internal threshold is set to 1.23V.
A resistor divider is needed to adjust the desired low battery threshold.
3LBO
Battery low voltage detector output. If the voltage at the LBI pin drops
below the internal threshold typ. 1.23V, LBO goes low.
The LBO is an open drain output and so a pull-up resistor (about
200KΩ) has to be added for correct output setting .
4 REF 1.23V reference voltage. Bypass this output to GND with a 100nF
capacitor for filtering high frequency noise. No capacitor is required for
stability
5 SHDN
Shutdown pin. When pin 5 is below 0.2V the device is in shutdown,
when pin 5 is above 0.6V the device is operating.
6 GND Ground pin
7 LX Step-up inductor connection
8 OUT Power OUTPUT pin