aoz1360 Alpha & Omega Semiconductor, aoz1360 Datasheet - Page 8

• Manufacturer Part Number: aoz1360
• Description: Programmable Current-limited Load Switch
• Manufacturer: Alpha & Omega Semiconductor

Alpha & Omega Semiconductor
Applications Information
Input Capacitor Selection
Use a 1uF or larger capacitor for input bypassing. This will limit the input voltage drop during output transient
conditions. 1uF capacitor should be adequate for most applications; however, higher capacitor values will
further reduce the voltage drop. Place the bypass capacitor as close to the IN pins as feasibly possible.
Output Capacitor Selection
Use a 0.1uF or larger capacitor between the OUT and GND pins. The capacitance does not affect the turn on
slew rate; however, a larger capacitor will make the initial turn on transient smoother.
Power Dissipation Calculation
Calculate the power dissipation for normal load condition using the following equation:
P
The worst case power dissipation occurs when the load current hits the current limit due to over-current or short
circuit faults. The power dissipation under these conditions can be calculated using the following equation:
P
Layout Guidelines
Good PCB layout is important for improving the thermal and overall performance of AOZ1360. To optimize the
switch response time to output short-circuit conditions keep all traces as short as possible to reduce the effect of
unwanted parasitic inductance. Place the input and output bypass capacitors as close as possible to the IN and
OUT pins. The input and output PCB traces should be as wide as possible for the given PCB space. Use a
ground plane to enhance the power dissipation capability of the device.
AOZ1360AI (SO-8) Layout
AOZ1360DI (4x4 DFN) Layout
AOZ1360 Preliminary Data Sheet Rev0
D
D
= R
= (V
ON
IN
– V
x (I
OUT
OUT
)
) x I
2
LIMIT
8
Alpha and Omega Semiconductor Confidential
AOZ1360