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SI786CGSILICONIXN/a498avaiDual-Output Power-Supply Controller
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SI786LG-T1 |SI786LGT1VISHAY N/a29000avaiDual-Output Power-Supply Controller


SI786LG-T1 ,Dual-Output Power-Supply ControllerSi786Vishay SiliconixDual-Output Power-Supply Controller
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SI786CG-SI786LG-SI786LG-T1
Dual-Output Power-Supply Controller
Si786
Vishay Siliconix
Dual-Output Power-Supply Controller

FEATURES Fixed 5-V and 3.3-V Step-down Converters Less than 500-�A Quiescent Current per Converter 25-�A Shutdown Current 5.5-V to 30-V Operating Range
DESCRIPTION
The Si786 Dual Controller for Portable Computer PowerConversion is pin and functionally compatible with the
MAX786 dual-output power supply controller for notebookcomputers. The device is designed as a drop-in replacementfor that circuit.
The circuit is a system level integration of two step-down
controllers, micropower 5-V and 3.3-V linear regulators, andtwo comparators. The controllers perform high efficiency
conversion of the battery pack energy (typically 12 V) or theoutput of an ac to dc wall converter (typically 18-V to 24-V dc)to 5-V and 3.3-V system supply voltages. The micropower
linear regulator can be used to keep power management andback-up circuitry alive during the shutdown of the step-down
converters. The comparators can be biased at any voltagebetween 2.7 V and the input voltage, simplifying battery
monitoring or providing sufficient voltage to enhance the gateof a low on-resistance n-channel FET used in switching powerto different zones in the system.
A complete power conversion and management system canbe implemented with the Si786 Dual Controller for Portable
Computer Power Conversion, 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 Pin-Programmable Dual Controller for Portable
PCs is another integrated system level devices for portable PCpower systems.
The Si786 is available in both standard and lead (Pb)-free28-pin SSOP packages and specified to operate over the (0�C
to 70�C), (−10�C to 90�C) and (−40�C to 85�C) temperatureranges. See Ordering Information for corresponding partnumbers.SHUTDOWN
5-V ON/OFF
3.3-V ON/OFF
SYNC
5.5. Vto30 V
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