ST662A datasheet(8/13 Pages) STMICROELECTRONICS

Part #	ST662A

Description	DC-DC CONVERTER FROM 5V TO 12V, 0.03A FOR FLASH MEMORY PROGRAMMING SUPPLY

PDF	13 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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8 / 13 page

ST662A

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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.

Fig. 21 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 20). The relevant Output Current capability is shown in figure 22 in which is shown the output

voltage vs load current.

Figure 19 : Application Circuit for Two ST662A in Parallel

TABLE 2: List of Components

CAPACITOR

TYPE

VALUE (µF)

C1A

Ceramic

0.22

C2A

Ceramic

0.22

C1B

Ceramic

0.22

C2B

Ceramic

0.22

Electrolytic Tantalum

Ceramic

0.22

ST662A Datasheet(PDF) 8 Page - STMicroelectronics