STBP112

Pin description

Doc ID 023357 Rev 3

9/38

Figure 3.

Block diagram

Figure 4.

Typical application circuit

1.

required. Low ESR ceramic capacitor C1 is necessary to ensure proper function of the STBP112. Capacitor C2 is not

necessary for STBP112 but may be required by the charger IC.

2.

The STBP112 MOSFET switch topology allows the current to flow also in a reverse direction, i.e. from OUT to IN, which

can be useful for powering external peripherals from the system connector. If the reverse current (supply current) is

undesirable, it may be prevented by connecting an external Schottky diode in series with the OUT pin. The voltage drop

between IN and the charger is then increased by the voltage drop across the diode.