ST662ABD-TR(2007) データシートの表示（PDF） - STMicroelectronics

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ST662ABD-TR
(Rev.:2007)

DC-DC converter from 5V to 12V, 0.03A for flash memory programming supply

STMicroelectronics 

ST662AB - ST662AC

How to increase output current or output voltage capability

8

How to increase output current or output voltage

capability

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

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

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 12V 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 7.

List of component

Capacitor

C1A

C2A

C1B

C2B

C3

C4

C5

Type

Ceramic

Ceramic

Ceramic

Ceramic

Electrolytic Tantalum

Electrolytic Tantalum

Ceramic

Value (µF)

0.22

0.22

0.22

0.22

10

10

0.22

13/20

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