How to increase output current or output voltage capability

ST662AB, ST662AC

14/20

Doc ID 5068 Rev 8

8

How to increase output current or output voltage

capability

connecting in parallel two or more ST662A devices; each one of them can supply 30 mA.

The Figure 19 shows the electric schematic. The capacitors C3, C4 and C5 must be placed

very close to the ICs on the board. If this is not possible, you can place two different

capacitors, each of them of half value, very close to the respective integrated circuit.

Figure 23 show the output current capability of the proposed circuit.

If an output voltage greater than 12 V is required, it’s possible to realize the circuit of the

following diagram Figure 22. The relevant output current capability is shown in Figure 24 in

which is shown the output voltage vs. load current.

Figure 21.

Application circuit for two ST662A in parallel

Table 8.

List of component

Capacitor

Type

Value (µF)

C1A

Ceramic

0.22

C2A

Ceramic

0.22

C1B

Ceramic

0.22

C2B

Ceramic

0.22

C3

Electrolytic Tantalum

10

C4

Electrolytic Tantalum

10

C5

Ceramic

0.22