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參數資料
| 型號： | MIC2012 |
| 廠商： | Micrel Semiconductor,Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | USB Power Controller Advance Information |
| 中文描述： | USB電源控制器進展信息 |
| 文件頁數： | 1/10頁 |
| 文件大小： | 56K |
| 代理商： | MIC2012 |
September 2000
1
MIC2012/2072
MIC2012
Micrel
MIC2012/MIC2072
USB Power Controller
Advance Information
General Description
The MIC2012 is a dual channel USB power switch designed
to support the power distribution requirements for USB Wakeup
from the ACPI S3 state. The MIC2012 will directly switch its
two outputs between a 5V main supply and a 5V auxiliary
supply normally provided in ATX style power supplies.
The MIC2012 will adjust its current-limit threshold according
to the ACPI state it is in. In the normal active S0 state the
current-limit is set at 500mA minimum per channel satisfying
the USB continuous output current specification. In the S3
state the current-limit can be reduced to only 100mA per
channel to minimize the current that is supplied by the
auxiliary supply thereby ensuring that voltage regulation is
maintained even during fault conditions.
The MIC2012 provides make-before-break switching to en-
sure glitch-free transitions between the S3 and S0 states.
Each channel is also thermally isolated from the other so that
a fault in one channel does not effect the other. FAULT status
output signals are also provided indicating overcurrent and
thermal shutdown conditions.
The MIC2072 option latches the output off upon detecting an
overcurrent condition for more than 5ms minimum. The
output can be reset by either toggling the EN inputs of the
MIC2072-1, -2 or by removing the load. Latching the output
off provides a circuit breaker mode of operation which re-
duces power consumption during fault conditions.
Typical Application
MIC2012P
V
BUS
D+
D–
GND
MAIN
AUX
S3#
FAULT1#
FAULT2#
OUT1
Downstream
USB
Port 1
100
μ
F
5V MAIN
ATX Power Supply
V
BUS
D+
D–
GND
Downstream
USB
Port 2
OUT2
GND
5V STANDBY
82801AA or Equivalent
SLP S3#
SLP S5#
OC0
OC1
Overcurrent Port 1
Overcurrent Port 1
S3 Control
100
μ
F
Figure 1. USB Wakeup with Control Input
Features
Compliant to USB power distribution specifications
Two completely independent switches
Integrated switching matrix supports ACPI S0/S3 state
transitions without external FET circuits
Make-before-break switching ensures glitch-free
transitions
No back-feed of auxiliary supply onto main supply
during standby mode
Bi-level current-limit preserves auxiliary supply voltage
regulation in standby mode
Thermally isolated channels
Thermal shutdown protection
Fault status outputs with filter prevents false assertions
during hot-plug events
Latched thermal shutdown options with auto-reset
(MIC2072)
Undervoltage lockout
Applications
Desktop PCs
Notebook PCs
Notebook Docking stations
LAN Servers
PC Motherboards
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
相關PDF資料 |
PDF描述 |
|---|---|
| MIC2012CM | USB Power Controller Advance Information |
| MIC2072-2CQS | USB Power Controller Advance Information |
| MIC2075-1BM | Circular Connector; No. of Contacts:6; Series:; Body Material:Aluminum; Connecting Termination:Solder; Connector Shell Size:10; Circular Contact Gender:Socket; Circular Shell Style:Right Angle Plug; Insert Arrangement:10-6 |
| MIC2075-1BMM | 71-148810-98P |
| MIC2075-2BM | Circular Connector; Body Material:Aluminum; Series:PT08; No. of Contacts:6; Connector Shell Size:10; Connecting Termination:Solder; Circular Shell Style:Right Angle Plug; Circular Contact Gender:Pin; Insert Arrangement:10-98 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MIC2012_05 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:USB Power Controller |
| MIC2012-1PBQS | 功能描述:IC USB PWR CTRLR DUAL 16-QSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND |
| MIC2012-1PBQS TR | 功能描述:IC USB PWR CTRLR DUAL 16-QSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:2,450 系列:- 控制器類型:SPI 總線至 I²C 總線橋接 接口:I²C，串行，SPI 電源電壓:2.4 V ~ 3.6 V 電流 - 電源:11mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應商設備封裝:24-HVQFN（4x4） 包裝:托盤 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名稱:935286452157SC18IS600IBSSC18IS600IBS-ND |
| MIC2012-1PCQS | 功能描述:IC USB PWR CTRLR DUAL 16-QSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應商設備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| MIC2012-1PCQS TR | 功能描述:IC USB PWR CTRLR DUAL 16-QSOP RoHS:否 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標準包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應商設備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
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