APE8988_16 Datasheet, PDF (8/10 Pages) Advanced Power Electronics Corp. – 1.5A LOAD SWITCH WITH CONTROLLED TURN ON

Advanced Power
Electronics Corp.
APE8988
APPLICATION INFORMATION
On/Off Control
The load switch is controlled by the EN pin. The EN pin is active high and has a low threshold making it
capable of interfacing with low voltage signals. The EN pin can be used with standard 1.8V, 2.5V or 3.3V
GPIO logic threshold. Do not leave the EN pin float.
The Figure17 shows the VOUT on/off definition.
t_D-ON: VOUT turn-on delay time
t_R: VOUT rise time
t_D-OFF: VOUT turn-off delay time
t_F: VOUT fall time
EN
90%
90%
VOUT
tD-ON
10%
tR
tD - OFF
Fig.17 ON/OFF Waveform
10%
tF
FLAG Indicator
. _{The APE8988 provides an error indicator (/FLG) output, which is an open-drain output requiring a pull-up}
resistor. Typically connect to +5V bias supply through a 10kΩ resistor. The FLAG comparator continuously
monitors the fault condition for over current, short circuit and thermal shutdown conditions. If the fault
condition keeps for 3ms, /FLG becomes low immediately.
Input Capacitor
An input capacitor is recommended to be placed between VIN and GND to limit the voltage drop on the input
supply during high current application.
Output Capacitor
Setting a C_IN greater than the C_OUT is highly recommended. Since the internal body diode is in the NMOS
switch, this prevents the current flows through the body diode from VOUT to VIN when the system supply is
removed.
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