MIC2010 Micrel Semiconductor, MIC2010 Datasheet - Page 8

• Manufacturer Part Number: MIC2010
• Description: USB Power Controller Advance Information
• Manufacturer: Micrel Semiconductor

MIC2010
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 or open-drain configuration. 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
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
10ms. Since the delay timer is shared between both channels
it is possible for t
MIC2010/2070
DLY
to be extended by an amount equal to the
(MIC2010-2)
(MIC2070-2)
FAULT
FAULT
V
V
OUT
OUT
EN
EN
Output Resets When Load is Removed
Figure 7. MIC2070 System Timing—
Figure 6. MIC2010 System Timing
DLY
is typically
DLY
, has
8
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.
Thermal Shutdown
Load Removed–
Overcurrent Fault
Overcurrent Fault
Output Reset
Reached
September 2000
Micrel