SI786

更新时间： 2024-09-14 22:33:55

品牌	Logo	应用领域
威世 - VISHAY		控制器
页数	文件大小	规格书
14页	131K
描述
Dual-Output Power-Supply Controller

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SI786 数据手册

Si786

Vishay Siliconix

Dual-Output Power-Supply Controller

FEATURES

D Fixed 5-V and 3.3-V Step-down Converters

D Less than 500-mA Quiescent Current per Converter

D 25-mA Shutdown Current

D 5.5-V to 30-V Operating Range

DESCRIPTION

The Si786 Dual Controller for Portable Computer Power

Conversion is pin and functionally compatible with the

MAX786 dual-output power supply controller for notebook

computers. The device is designed as a drop-in replacement

for that circuit.

A complete power conversion and management system can

be implemented with the Si786 Dual Controller for Portable

Computer Power Conversion, an inexpensive linear regulator,

the Si9140 SMP Controller for High Performance Processor

Power Supplies, five Si4410 n-channel TrenchFETR Power

MOSFETs, one Si4435 p-channel TrenchFET Power

MOSFET, and two Si9712 PC Card (PCMCIA) Interface

Switches.

The circuit is a system level integration of two step-down

controllers, micropower 5-V and 3.3-V linear regulators, and

two comparators. The controllers perform high efficiency

conversion of the battery 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-V system supply voltages. The micropower

linear regulator can be used to keep power management and

back-up circuitry alive during the shutdown of the step-down

converters. The comparators can be biased at any voltage

between 2.7 V and the input voltage, simplifying battery

monitoring or providing sufficient voltage to enhance the gate

of a low on-resistance n-channel FET used in switching power

to different zones in the system.

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. See Ordering Information for corresponding part

numbers.

FUNCTIONAL BLOCK DIAGRAM

3.3 V

5.5. V

30 V

Power

Memory

Section

5 V

Peripherals

Si786

SHUTDOWN

5-V ON/OFF

3.3-V ON/OFF

SYNC

Low-Battery Warning

Power-Good

Document Number: 70189

S-40807—Rev. J, 26-Apr-04

www.vishay.com

12 3 4 5 6 7...14

中文翻译

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与SI786相关器件

型号	品牌	获取价格	描述	数据表
SI7860ADP	VISHAY	获取价格	N-Channel Reduced, Fast Switching MOSFET
SI7860ADP-T1-GE3	VISHAY	获取价格	TRANSISTOR POWER, FET, FET General Purpose Power
SI7860DP	VISHAY	获取价格	N-Channel Reduced Qg, Fast Switching MOSFET
SI7860DP-E3	VISHAY	获取价格	TRANSISTOR 11 A, 30 V, 0.008 ohm, N-CHANNEL, Si, POWER, MOSFET, POWERPAK, SO-8, FET Genera
SI7860DP-T1	VISHAY	获取价格	Power Field-Effect Transistor, N-Channel, Metal-oxide Semiconductor FET
SI7860DP-T1-GE3	VISHAY	获取价格	TRANSISTOR 11 A, 30 V, 0.008 ohm, N-CHANNEL, Si, POWER, MOSFET, ROHS COMPLIANT, POWERPAK,
Si7862ADP	VISHAY	获取价格	N-Channel 16-V (D-S) MOSFET
SI7862ADP-T1-E3	VISHAY	获取价格	TRANSISTOR 18 A, 16 V, 0.003 ohm, N-CHANNEL, Si, POWER, MOSFET, ROHS COMPLIANT, LEADLESS,
SI7862ADP-T1-GE3	VISHAY	获取价格	TRANSISTOR 18 A, 16 V, 0.003 ohm, N-CHANNEL, Si, POWER, MOSFET, HALOGEN FREE AND ROHS COMP
SI7862DP	VISHAY	获取价格	Power Field-Effect Transistor, N-Channel, Metal-oxide Semiconductor FET,

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