SI786 Vishay, SI786 Datasheet
SI786
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SI786 Summary of contents
Page 1
... The Si9130 Pin-Programmable Dual Controller for Portable PCs is another integrated system level devices for portable PC power systems. The Si786 is available in both standard and lead (Pb)-free 28-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) temperature ranges ...
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... V REF Current -0. Current L -0. Continuous Power Dissipation ( 0.3 V 28-Pin SSOP - 0.3 V Operating Temperature Range: (T Si786CG/CRG/CSG (C-Grade Si786LG/LRG/LSG (L-Grade) -0 0.3 V) Si786DG/DRG/DSG (D-Grade Lead Temperature (soldering, 10 sec Notes -0.3 V (BST + 0 ...
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... V - 0.5 H 0.4 4 270 300 330 260 300 330 170 200 230 165 200 230 200 200 200 240 350 0.8 2 0.5 L " Si786 a Unit kHz kHz ns kHz % % and CL www.vishay.com 3 ...
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... Si786 Vishay Siliconix TYPICAL CHARACTERISTICS (25_C UNLESS NOTED) Efficiency vs. 5-V Output Current, 200 kHz 100 SYNC = 0 V, 3.3 V Off 60 50 0.001 0.01 0.1 5-V Output Current (A) Efficiency vs. 3.3-V Output Current, 200 kHz 100 SYNC = 0.001 0.01 0.1 3.3-V Output Current (A) Quiescent Supply Current vs ...
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... Load Current (mA) Pulse-Width Modulation Mode Waveforms 5-V Output 50 mV/div 2 V/div Vishay Siliconix Minimum Differential IN OUT vs. 5-V Output Current 5-V Output Still Regulating 300 kHz 200 kHz 0.001 0.01 0.1 1 5-V Output Current (A) 100 1000 500 ns/div 5-V Output Current = www.vishay.com Si786 V/div 5-V Output 50 mV/div 5 ...
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... Si786 Vishay Siliconix TYPICAL CHARACTERISTICS (25_C UNLESS NOTED) 5-V Load-Transient Response 200 mS/div 5-V Line-Transient Response, Rising 20 mS/div LOAD 3.3-V Line-Transient Response, Rising 20 mS/div LOAD www.vishay.com 6 3.3-V Load-Transient Response 3 A LOAD CURRENT 0 A 5-V Output 50 mV/div 5-V Line-Transient Response, Falling 5-V Output 50 mV/div ...
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... Description to GND when D is high. Sinks 500 mA to GND when for automatic turn-on. The 5 for automatic turn-on. L Si786 Vishay Siliconix . 3 for automatic turn-on low regardless of V input 2 H supply will not be disabled in shutdown allow GND ...
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... Buck controllers are shut down. Two voltage comparators with adjustable output voltages are included in the Si786. They can be used for gate drive in load switching applications, where n-channel MOSFETs are used. Logic level voltages can be generated as well, for instance to serve as mP interfacing (e ...
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... Switching Controllers Each PWM controller on the Si786 is identical with the exception of the preset output voltages. The controllers only share three functional blocks (see Figure 2): the oscillator, the voltage reference (REF) and the 5-V logic supply (V 3.3-V and 5-V controllers are independently enabled with pins ...
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... REF PGND FIGURE 1. Si786 Application Circuit 5-V LDO Linear Regulator 3.3-V Reference ON 4 2.8 V STANDBY 300 kHz/200 kHz ON Oscillator FIGURE 2. Si786 Block Diagram C10 D1FS4 330 mF (Note 1) C8 0.01 mF COMPARATOR SUPPLY INPUT ...
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... Document Number: 70189 S-40807—Rev. J, 26-Apr- kHz LPF Summing Comparator Minimum Current (Pulse-Skipping Current Limit 100 mV 30R 3 FIGURE 3. Si786 Controller Block Diagram Si786 Vishay Siliconix CS _ FB_ BST_ R Q Level DH S Shift _ LX_ OSC Shoot- Through Control V L ...
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... DL_ FIGURE 4. Boost Supply for Gate Drivers Pulse-Skipping Mode When the load requires less than 25% of its maximum, the Si786 enters a mode which drives the gate for one clock cycle and skips the majority of the remaining cycles. Pulse-skipping operate in mode cuts down on the switching losses, the dominant power consumer at low current levels ...
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... Oscillator and SYNC There are two ways to set the Si786 oscillator frequency: by using an external SYNC signal, or using the internal oscillator. The SYNC pin can be driven with an external CMOS level signal with frequency from 240 kHz and 350 kHz to synchronize to the internal oscillator. Tying SYNC to either V or GND sets the frequency to 200 kHz and to REF sets the frequency to 300 kHz ...
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... Si786 Vishay Siliconix Both minimum capacitance and maximum ESR requirements must be met. In order to get the low ESR, a capacitance value of two to three times greater than the required minimum may be necessary. The equation for output ripple in continuous current mode is ESR ) OUT(RPL) LPP(MAX) ...
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... Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right ...