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ST662ACD Datasheet(PDF) 8 Page - STMicroelectronics |
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ST662ACD Datasheet(HTML) 8 Page - STMicroelectronics |
8 / 12 page 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 C3 Electrolyt ic Tant alum 10 C4 Electrolyt ic Tant alum 10 C5 Ceramic 0.22 Figure 6: Application Circuit for Two ST662A in Parallel 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 6 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. 8 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 7). The relevant Output Current capability is shown in figure 9 in which is shown the output voltage vs load current. ST662A 8/12 |
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