參數(shù)資料
型號: MIC2070-2PCQS TR
廠商: Micrel Inc
文件頁數(shù): 12/13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: MIC2070-2PCQSTR
MIC2070-2PCQSTR-ND
MIC2010/2070
Micrel
M9999-101104
8
January 2005
off. This time duration will be shortest in the case of a dead
short on the output.
Fault Status Output
The FAULT signal is an active-low output with a weak pull-
up. FAULT is asserted when either an overcurrent or thermal
shutdown condition occurs. In the case of an overcurrent
condition, FAULT will be asserted only after the flag response
delay time, t
DLY , has elapsed. This ensures that FAULT is
asserted only upon valid overcurrent conditions and that
erroneous error reporting is eliminated. The FAULT response
delay time t
DLY is typically 10ms. Since the delay timer is
shared between both channels it is possible for t
DLY to be
extended by an amount equal to the difference between the
occurrence of the over-current event in both channels.
Undervoltage Lockout
Undervoltage lockout (UVLO) prevents the output MOSFET
from turning on until the AUX input exceeds approximately
3.5V. UVLO ensures that the output MOSFETs remain off to
prevent high transient inrush current due to stray or bulk load
capacitance. This helps to ensure that the power supply
voltage regulation is preserved and also prevents possible
damage to sensitive components.
EN
(MIC2010-2)
VOUT
Overcurrent Fault
Thermal Shutdown
Reached
FAULT
Figure 6. MIC2010 System Timing
EN
(MIC2070-2)
VOUT
Overcurrent Fault
Load Removed–
Output Reset
FAULT
Figure 7. MIC2070 System Timing—
Output Resets When Load is Removed
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