AAT3125 Datasheet, PDF (10/12 Pages) Advanced Analogic Technologies – USB OTG 5V Charge Pump

(open) when OUT is above the SRRDY threshold
or when EN is a logic low. Upon activation by EN,
there is no negative glitch that can be mistaken for
OUT below 0.8V.
Power OK
USB OTG devices connected as Host must main-
tain V_OUT above 4.4 volts or report that it is below
4.4 volts. Two Power OK outputs (POK1 and
POK2) provide a window comparison of the V_OUT
voltage. The POK1 open drain output is pulled low
if V_OUT drops below 4.0V ± 5%, and the POK2 open
drain output is pulled low if V_OUT drops below 4.4V
± 5%.
AAT3125
USB OTG 5V Charge Pump
Under-Voltage Lockout
Circuits other than the MicroPower voltage detector
(SESDET) require voltage to be present on IN.
Under-voltage lockout guarantees that sufficient
voltage is present on IN to ensure operation. All
functions other than the SESDET flag are disabled
if the voltage on IN is less than 2V.
Discharge Resistor
In accordance with the USB OTG specification, a
pull-down resistor is provided to discharge V_BUS at
a current of not more than 8mA.
Over-Temperature Protection
If the AAT3125 junction temperature exceeds
125°C, the charge pump is shut down.
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3125.2005.12.1.4