AIC1520 Analog Intergrations Corporation, AIC1520 Datasheet - Page 6

• Manufacturer Part Number: AIC1520
• Description: Single High-Side Power Switch
• Manufacturer: Analog Intergrations Corporation

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l Current Limit
l Thermal Protection
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The current limit threshold is preset internally. It
protects the output MOSFET switches from
damage due to undesirable short circuit conditions
or excess inrush current often encountered during
hot plug-in. AIC1520 allows a minimum current of
0.5A through the MOSFET switches.
When the chip temperature exceeds 110°C, the
thermal protection function works.
A 0.1mF to 1mF bypass capacitor from IN to GND,
located near the device, is strongly recommended
to control supply transients. Without a bypass
capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance)
to damage internal control circuitry.
Supply Filtering
Transient Droop Requirements
PIN DESCRIPTION
APPLICATION INFORMATIONS
PIN 1: IN
PIN 2: GND
- Power supply input.
- Chip power ground.
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USB support dynamic attachment (hot plug-in) of
peripherals. A current surge is caused by the input
capacitance of downstream device. Ferrite beads
are recommended in series with all power and
ground connector pins. Ferrite beads reduce EMI
and limit the inrush current during hot-attachment
by filtering high-frequency signals.
Bulk capacitance provides the short-term transient
current needed during a hot-attachment event.
With a 33uF, 16V tantalum or 100uF, 10V
electrolytic
downstream connector should provide transient
drop protection.
The power circuitry of USB printed circuit boards
requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
Short Circuit Transient
Printed Circuit Layout
PIN 3: OUT
capacitor
- MOSFET switch output.
mounted
AIC1520
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