AIC1525
USB High-Side Power Switch
FEATURES
DESCRIPTION
n
n
l 70mW (5V Input) High-Side MOSFET Switch.
l 500mA Continuous Load Current per Channel.
l 75mA Typical On-State Supply Current.
l 1mA Typical Off-State Supply Current.
l Current-Limit / Short Circuit Protection.
The AIC1525 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 70mW RDS(ON), which
meets USB voltage drop requirements for
maximum transmission wire length.
l Thermal Shutdown Protection under Overcurrent
Condition.
l Undervoltage Lockout Ensures that Switch is off at
Start Up.
Multi-purpose open-drain fault flag output
indicates over-current limiting, thermal shutdown,
or undervoltage lockout. Output current is typically
limited to 0.85A below the 5A safety requirement,
and thermal shutdown function shuts the switch
off to prevent damage under overcurrent condition.
l Output can be Forced Higher than Input (Off-State).
l Open-Drain Fault Flag.
l Slow Turn ON and Fast Turn OFF.
l Enable Active-High or Active-Low.
APPLICATIONS
· USB Power Management.
l Hot Plug-In Power Supplies.
l Battery-Charger Circuit.
n
Guaranteed minimum output rise time limits
inrush current during hot plug-in, minimizing EMI
and preventing the voltage at upstream port from
dropping excessively.
TYPICAL APPLICATION
CIRCUIT
n
VCC
5.0V
m
33
F
10K
4.50V to 5.25V
Upstream VBUS
100mA max
Ferrite
Bead
AIC1722
USB Controlller
VBUS
D+
VIN
ON/OFF
IN
OUT
OUT
IN
CTL
VBUS
D+
+
OVERCURRENT
GND
+
FLG
GND
NC
+
m
CIN
1
F
m
m
0.01 F
m
10 F
COUT
33
F
D-
OUT
IN
D-
GND
GND
GND
AIC1525
m
F
0.1
DATA
m
*
33 F, 16V Tantalum, or
DATA
m
100 F, 10V Electrolytic
Bold line indicate high- current traces
One-Port Self-Powered Hub
Analog Integrations Corporation
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-1525-00 May 16, 00
TEL: 886-3-5772500 FAX: 886-3-5772510
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