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SI9130LG
Pin-Programmable Dual ControllerPortable PCs
Si9130
Vishay Siliconix
Pin-Programmable Dual Controller—Portable PCsFEATURES Fixed 5-V and Programmable 3.3-V, 3.45 V, or 3.6 V Step-DownConverters Less than 500-�A Quiescent Current per Converter 25-�A Shutdown Current 5.5-V to 30-V Operating Range
DESCRIPTION
The Si9130 Pin-programmable Dual Controller for Portable
PCs is a pin-programmable version of the Si786 dual-outputpower supply controller for notebook computers. The Buck
controllers provide 5 V and a pin-programmable output delivering3.3 V, 3.45 V, or 3.6 V.
The circuit is a system level integration of two step-downcontrollers and micropower 5-V and 3.3-V linear regulators.
The controllers perform high efficiency conversion of thebattery pack energy (typically 12 V) or the output of an ac to dc
wall converter (typically 18-V to 24-V dc) to 5-V and 3.3-Vsystem supply voltages. The micropower linear regulator can
be used to keep power management and back-up circuitryalive during the shutdown of the step-down converters.
A complete power conversion and management system can
be implemented with the Si9130 Pin-programmable DualController for Portable PCs, an inexpensive linear regulator,
the Si9140 SMP Controller for High Performance ProcessorPower Supplies, five Si4410 n-channel TrenchFET� Power
MOSFETs, one Si4435 p-channel TrenchFET PowerMOSFET, and two Si9712 PC Card (PCMCIA) Interface
Switches.
The Si9130 is available in both standard and lead (Pb)-free
28-pin SSOP packages and specified to operate over thecommercial (0�C to 70�C) and extended commercial (−10�C
to 90�C) temperature ranges. See Ordering Information forcorresponding part numbers.SHUTDOWN
5-V ON/OFF
3.3-V ON/OFF
SYNC
5.5 V to 30 V
