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SC1165 Datasheet(PDF) 6 Page - Semtech Corporation |
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SC1165 Datasheet(HTML) 6 Page - Semtech Corporation |
6 / 12 page PROGRAMMABLE SYNCHRONOUS DC/DC CONVERTER, DUAL LOW DROPOUT REGULATOR CONTROLLER © 1999 SEMTECH CORP. October 25, 1999 652 MITCHELL ROAD NEWBURY PARK CA 91320 SC1164/5 6 MATERIALS LIST Qty. Reference Part/Description Vendor Notes 4 C1,C5,C13,C 18 0.1µF Ceramic Various 6 C2,C3,C14- C17 1500µF/6.3V SANYO MV-GX or equiv. Low ESR 6 C9-C12, C21, C22 330µF/6.3V Various 1 L1 4µH 8 Turns 16AWG on MICROMETALS T50-52D core 4 Q1,Q2,Q3, Q4 See notes See notes FET selection requires trade-off between efficiency and cost. Absolute maximum R DS(ON) = 22 mΩ for Q1,Q2 1R4 5m Ω IRC OAR-1 Series 1R5 2.32k Ω, 1%, 1/8W Various 1R6 1k Ω, 1%, 1/8W Various 1R1 10 Ω, 5%, 1/8W Various 1 R12 1%, 1/8W Various See Table Below (Not required for SC1164) 1 R13 1%, 1/8W Various See Table Below (Not required for SC1164) 1 R14 1%, 1/8W Various See Table Below (Not required for SC1164) 1 R15 1%, 1/8W Various See Table Below (Not required for SC1164) 2 R17,R18 100k Ω, 5%,1/8W Various Required if Voltage is applied to the linear FET(s) without 12V applied to SC1164/5 1 U1 SC1164/5CSW SEMTECH SETTING LDO OUTPUT VOLTAGE error t significan cause not does term ) R I ( the that so enough low be must R and R ion clarificat for diagram layout See resistor feedback Bottom R resistor feedback Top R current bias pin Feedback I : Where ) R I ( R ) R R ( 265 . 1 V A FB B A B A FB A FB B B A OUT ⋅ = = = ⋅ + + ⋅ = R B R A VOUT LDO1 (LDO2) R12 (R14) R13 (R15) 3.45V 105 Ω 182 Ω 3.30V 105 Ω 169 Ω 3.10V 102 Ω 147 Ω 2.90V 100 Ω 130 Ω 2.80V 100 Ω 121 Ω 2.50V 100 Ω 97.6 Ω 1.50V 100 Ω 18.7 Ω |
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