MIC2010-1CQS Ver la hoja de datos (PDF) - Micrel

Número de pieza

componentes Descripción

Fabricante

MIC2010-1CQS

USB Power Controller

Micrel 

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, tDLY , 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 tDLY is typically

10ms. Since the delay timer is shared between both channels

it is possible for tDLY to be extended by an amount equal to the

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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

FAULT

Overcurrent Fault

Thermal Shutdown

Reached

Figure 6. MIC2010 System Timing

EN

(MIC2070-2)

VOUT

FAULT

Overcurrent Fault

Load Removed–

Output Reset

Figure 7. MIC2070 System Timing—

Output Resets When Load is Removed

MIC2010/2070

8

September 2000

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