AIC1523 Analog Intergrations Corporation, AIC1523 Datasheet - Page 7

• Manufacturer Part Number: AIC1523
• Description: 500mA Power Distribution Switch
• Manufacturer: Analog Intergrations Corporation

n
n
l Current Limit
l Thermal Protection
l
l
When the chip temperature exceeds 1 10 C, the
thermal protection function works.
A 0.1uF to 1uF 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
PIN DESCRIPTION
APPLICATION INFORMATIONS
PIN 1/4/6/8: NC:
PIN 2: CTL
The current limit threshold is preset internally. It
protects the output MOSFET switches from
damage
conditions or excess inrush current often
encountered during hot plug-in. The
allows minimum 500mA continuous load current
per Channel.
due
- TTL compatible control input. It
to
controls the power switch turn-
on/turn-off.
AIC1523-1 and active low for
AIC1523-0.
undesirable
Active
short
AIC1523
High
circuit
for
l
l
l
A current surge is caused by the input capacitance
of 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
capacitor mounted close to downstream connector
should provide transient drop protection.
The power circuitry of
requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
Transient Droop Requirements
Short Circuit Transient
Printed Circuit Layout
PIN 3: IN-
PIN 4: GND-
PN 7: OUT-
Power supply input.
Chip power ground.
MOSFET switch output.
printed circuit boards
AIC1523
7