- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄11577 > MIC2070-1PZQS TR (Micrel Inc)IC USB PWR CTRLR DUAL 16-QSOP PDF資料下載
參數(shù)資料
| 型號： | MIC2070-1PZQS TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 11/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC USB PWR CTRLR DUAL 16-QSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 控制器類型： | USB 電源控制器 |
| 接口： | USB |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 電流 - 電源： | 1mA |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-QSOP |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | MIC2070-1PZQSTR MIC2070-1PZQSTR-ND |
January 2005
7
M9999-101104
MIC2010/2070
Micrel
Functional Description
The MIC2010/2070 are designed to support the power distri-
bution requirements for USB wakeup from the ACPI S3 state.
It integrates two independent channels under control of input
S3#. When S3# is asserted LOW (ACPI S3 state) the MIC2010/
2070 will switch a 500m MOSFET switch from the AUX
input to each of its two outputs. In addition the current-limit
threshold will be set to a value specified by a resistor
connected to the RSET inputs. Conversely when the S3#
input is HIGH the MIC2010/2070 will switch a 100m MOSFET
switch from the MAIN inputs to each of its two outputs. The
current-limit threshold is preset to 500mA in this state. The
lower current limit during the ACPI S3 state helps to ensure
that the standby supply maintains regulation even during fault
conditions.
Thermal Shutdown
Thermal shutdown is employed to protect the device from
damage should the die temperature exceed safe margins
due mainly to short circuit faults. Thermal shutdown shuts off
the output MOSFET and asserts the FAULT output if the die
temperature reaches 140°C and the overheated channel is in
current limit. The other channel is not affected. If however, the
die temperature exceeds 160°C, both channels will be shut
off even if neither channel is in current limit.
Power Dissipation
The device’s junction temperature depends on several fac-
tors such as the load, PCB layout, ambient temperature and
package type. The power dissipated in each channel is
P
D = RDS(on) × IOUT
2 where R
DS(on) is the on-resistance of the
internal MOSFETs and I
OUT is the continuous output current.
Total power dissipation of the device will be the summation of
P
D for both channels. To relate this to junction temperature,
the following equation can be used:
Functional Diagram
Current
Limit
10ms
Timer
Charge Pump
+
Gate Control
S3#
EN
Current
Limit
MAIN
OUT
AUX
RSET
/FAULT
AUX
Latch
To Other Channel
*
MAIN
FET
AUX
FET
*MIC2070-1/2 Only
Thermal
Sense
* 'P' options only
TJ = P
D × θJA + TA
where:
T
J = junction temperature
T
A = ambient temperature
θJA = is the thermal resistance of the package
Current Sensing and Limiting
The current-limit threshold of each channel is preset inter-
nally at 500mA when S3# is deasserted. When S3# is
asserted the current-limit threshold is specified by a resistor
connected to the RSET input. The value of the current-limit
threshold is determined by the equation 18/R
SET ohms where
R
SET is the resistance connected between the RSET pin and
ground. The current-limit threshold should be set at 1.2X of
the applications continous output current requirement.
When an overcurrent condition lasts longer than t
DLY the
MIC2070 will activate an internal circuit breaker that will latch
the output off and assert FAULT. The output will remain off
until either the load is removed or EN is toggled. When the
MIC2070 enters a latched output condition a 1mA pull-up
current source is activated. This provides a way to automati-
cally reset the output once the load is removed without the
need to toggle the enable input. Please refer to Figure 7 for
timing details.
The MIC2010 will automatically reset its output when the die
temperature cools down to 120°C. The MIC2010 output and
FAULT signal will continue to cycle on and off until the device
is disabled or the fault is removed. Figure 6 depicts typical
timing. Depending on PCB layout, package, ambient tem-
perature, etc., it may take several hundred milliseconds from
the incidence of the fault to the output MOSFET being shut
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIC16F685T-I/SO | IC PIC MCU FLASH 4KX14 20SOIC |
| LTC4264CDE#TRPBF | IC INTERFACE 802.3AT 12-DFN |
| MIC2010-2PZQS | IC USB PWR CTRLR DUAL 16-QSOP |
| PIC16F1512-I/MV | IC MCU 8BIT 3.5KB FLASH 28-UQFN |
| 031-336 | BNC RIGHT ANGLE CRIMP RG-59 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2070-2PCQS | 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(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| MIC2070-2PCQS 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(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| MIC2070-2PZQS | 功能描述:IC USB PWR CTRLR DUAL 16-QSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)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(yīng)商設(shè)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 |
| MIC2070-2PZQS TR | 功能描述:IC USB PWR CTRLR DUAL 16-QSOP RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)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(yīng)商設(shè)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 |
| MIC2072-1PCQS | 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(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。