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SI9140DQ-T1-E3 Datasheet(PDF) 9 Page - Vishay Siliconix |
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SI9140DQ-T1-E3 Datasheet(HTML) 9 Page - Vishay Siliconix |
9 / 19 page Si9140 Vishay Siliconix Document Number: 70026 S-40699—Rev. H, 19-Apr-04 www.vishay.com 9 DESCRIPTION OF OPERATION Schematics of the Si9140 dc-to-dc conversion solutions for high-performance PC microprocessors are shown in Figure 1 and 2 respectively. These solutions are geared to meet the extremely demanding transient regulation and power requirements of these new microprocessors at minimal cost and with a minimal parts count. The two solutions are nearly identical, except for slight variations in output voltage, load transient amplitude, and specified power. Figure 3 is a schematic diagram for a 3.3-V logic converter. R6 4.99 k 13 U1 Si9140 14 15 16 2 3 4 1 10 11 12 5 6 7 9 8 C7 0.1 mF R5 240 k DR VDD VS VGOOD DS COMP UVLOSET FB NI VREF ENABLE COSC GND ROSC C6 0.1 mF C5, 180 pF C4, 5.6 pF C9 220 pF R9 11 k R8 40.2 k R7 100 k C3 0.1 mF + C2 3 x 330 mF 6.3V OS-CON PGND MON C8 1 mF 2 x Si4435DY 2 x Si4410DY R3 100 Power-Good R2 10 k R1 20 k R4 24.9 k C1 2 x 220 mF 10 V OS-CON VCCP + R12 13.3 k, 0.1% C10, 180 pF R11, 4.7 k 2.9 V (VOUT) R10 14.2 k 0.1% R13 10 k FIGURE 1. 2.9 V @ 10 A L1 1.5 mH D1 D1FS4 5 V (VIN) Coiltronics CTX07-12877 Power-Good FIGURE 2. 2.5 V @ 8.5 A R6 4.99 k 13 U1 Si9140 14 15 16 2 3 4 1 10 11 12 5 6 7 9 8 C7 0.1 mF R5 240 k DR VDD VS VGOOD DS COMP UVLOSET FB NI VREF ENABLE COSC GND ROSC C6 0.1 mF C5, 180 pF C4, 5.6 pF C9 220 pF R9 11 k R8 40.2 k R7 100 k C3 0.1 mF + C2 3 x 330 mF 6.3V OS-CON PGND MON C8 1 mF 2 x Si4435DY Si4410DY R3 100 R2 10 k R1 20 k R4 40.2 k C1 2 x 220 mF 10 V OS-CON VCCP + R12 13.3 k, 0.1% C10, 180 pF R11, 4.7 k 2.5 V (VOUT) R10 20 k 0.1% R13 10 k L1 1.5 mH D1 D1FS4 5 V (VIN) Coiltronics CTX07-12877 |
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