Datasheet

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
Current capability is limited by R
ON
of internal switches. It is possible to increase it
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