AIC1527
Quad USB High-Side Power Switch
n
FEATURES
•
110mΩ (5V Input) High-Side MOSFET Switch.
l
500mA Continuous Load Current per Channel.
l
220µA Typical On-State Supply Current.
l
1µA Typical Off-State Supply Current.
l
Current-Limit / Short Circuit Protection.
l
Thermal Shutdown 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).
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Open-Drain Fault Flag.
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Slow Turn ON and Fast Turn OFF.
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Enable Active-High or Active-Low.
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DESCRIPTION
The AIC1527 is a quad high-side power switch for
self-powered and bus-powered Universal Serial
Bus (USB) applications. One high-side switch is a
MOSFET with 110mΩ R
DS(ON)
, which meets USB
voltage drop requirements for maximum
transmission wire length.
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APPLICATIONS
•
USB Power Management.
l
l
Multi-purpose open-drain fault flag output
indicates over-current limiting, thermal shutdown,
or undervoltage lockout for each channel. Output
current is typically limited to 1A, well below the 5A
safety requirement, and the thermal shutdown
function independently controls each channel
under overcurrent condition.
Hot Plug-In Power Supplies.
Battery-Charger Circuit.
Guaranteed minimum output rise time limits
inrush current during hot plug-in, minimizing EMI
and preventing the voltage at upstream port from
dropping excessively.
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TYPICAL APPLICATION CIRCUIT
VCC
5.0V
Ferrite
Bead
+
33
µ
F
VBUS
D+
0
.
01
µ
F
D-
GND
DATA
10K
10K
+
33
µ
F
*
4.50V to 5.25V
Upstream VBUS
100mA max
VBUS
D+
D-
GND
+
1
µ
F
C
IN
10K
10K
AIC
17
22
1
7
IN
OUT
US B Con tr oller
+
VIN
ON/OFF
OVERCURRENT
OVERCURRENT
ON/OFF
ON/OFF
OVERCURRENT
OVERCURRENT
ON/OFF
GND
AI
I
C
1
527
A C 52
OUTA
CTLA
FLGA IN(A/B)
FLGB
GND1
CTLB
CTLA OUTB
FLGA
OUTA
FLGB IN(A/B)
CTLB
GND
1
OUTB
0.1
µ
F
+
33
µ
F
VBUS
D+
0
.
01
µ
F
D-
GND
DATA
GND
10
µ
F
C
OUT
*
DATA
0.1
µ
F
VBUS
+
33
µ
F
D+
0
.
01
µF
D-
GND
DATA
*
*
33
µ
F, 16V Tantalum, or
100
µ
F, 10V Electrolytic
Bold line indicate high- current traces
+
33
µ
F
VBUS
D+
0
.
01
µ
F
D-
GND
DATA
*
4-Port Self-Powered Hub
Analog Integrations Corporation
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
DS-1527-00
May 31, 00
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
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AIC [ ANALOG INTERGRATIONS CORPORATION ]
