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SI9136DB Datasheet(PDF) 1 Page - Vishay Siliconix |
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SI9136DB Datasheet(HTML) 1 Page - Vishay Siliconix |
1 / 14 page Si9136 Vishay Siliconix Document Number: 70818 S-00583—Rev. C, 03-Apr-00 www.vishay.com S FaxBack 408-970-5600 1 Multi-Output Power-Supply Controller FEATURES D Up to 95% Efficiency D 3% Total Regulation (Each Controller) D 5.5-V to 30-V Input Voltage Range D 3.3-V, 5-V, and 12-V Outputs D 200-kHz Low-Noise Fixed Frequency Operation D Precision 3.3-V Reference Output D 30 mA Linear Regulator Output D High Efficiency Pulse Skipping Mode Operation at Light Load D Only Three Inductors RequiredNo Transformer D LITTLE FOOTR Optimized Output Drivers D Internal Soft-Start D Minimal External Control Components D 28-Pin SSOP Package DESCRIPTION The Si9136 is a current-mode PWM and PSM converter controller, with two synchronous buck converters (3.3 V and 5 V) and a flyback (non-isolated buck-boost) converter (12 V). Designed for portable devices, it offers a total five power outputs (three tightly regulated dc/dc converter outputs, a precision 3.3-V reference and a 5-V LDO output). It requires minimum external components and is capable of achieving conversion efficiencies approaching 95%. The Si9136 is available in a 28-pin SSOP package and specified to operate over the extended commercial (0 _C to 90 _C) temperature range. FUNCTIONAL BLOCK DIAGRAM 5-V Linear Regulator 3.3-V Voltage Reference 3.3-V SMPS 5-V SMPS 12-V SMPS Power-Up Control VIN +3.3 V VL (5.0 V) Control Inputs VREF (+3.3 V) +5 V +12 V |
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