AIC1521 Datasheet, PDF (1/9 Pages) Analog Intergrations Corporation – Single High-Side Power Switch With Control Function

AIC1521
Single High-Side Power Switch With Control
Function
n ^FEATURES
• 120mΩ (5V Input) High-Side MOSFET Switch.
l 500mA Continuous Load Current.
l 80µA Typical On-State Supply Current.
l 1µA Typical Off-State Supply Current.
l Current-Limit / Short Circuit Protection.
l Thermal Limiting Protection under Overcurrent
Condition.
l Undervoltage Lockout Ensures that Switch is off at
Start Up.
l Output can be Forced Higher than Input (Off-State).
l Slow Turn ON and Fast Turn OFF.
l Active-High or Active-Low Enable.
n ^APPLICATIONS
l Motherboard USB Management.
l USB Power Management.
l Hot Plug-In Power Supplies.
l Battery-Charger Circuit.
l Power Distribution Switch.
n ^{TYPICAL APPLICATION}
CIRCUIT
n ^DESCRIPTION
The AIC1521 is an integrated high-side power
switch for self-powered and bus-powered Universal
Serial Bus (USB) applications. The high-side
switch is a MOSFET with 120mΩ R_DS(ON), which
meets USB voltage drop requirements for
maximum transmission wire length. The switch
ON/OFF is controlled by CTL pin.
Output current is typically limited to 1.0A, well
below the 5A safety requirement, and thermal
shutdown function shuts the switch off to prevent
damage under overcurrent conditions.
Guaranteed minimum output rise time limits
inrush current during hot plug-in, minimizing EMI
and preventing the voltage at upstream port from
dropping excessively.
VCC
5.0V
+
33µ F
AIC1521-0
IN
OUT
0.1µF
CTL
GND
+
*33µ F
Ferrite Bead
0 .01µ F
VBUS
D+
D-
GND
*33µF, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high-current traces
USB High-Side Power Switch
DATA
Analog Integrations Corporation
www.analog.com.tw
DS-1520-00 Aug 18, 00
TEL: [phone]
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
FAX: [phone]
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