Impala Linear Corporation
ILC7526/7536
Final
USB Dual Control Switches
General Description
The ILC7526 contains dual high side power control
switches, with independent enable and flag functions,
integrated into a single 8-pin SOIC package. With just a
few external components, the ILC7526 can be easily con-
figured to meet requirements for either self powered or
bus powered USB (Universal Serial Bus) applications.
The ILC7526 has active high ENABLE inputs, while the
ILC7536 ENABLE inputs are active low.
With a maximum R
DSON
value of 140mΩ per switch, the
USB voltage drop requirements can be achieved. Each
switch can also supply up to 500mA, with internal circuitry
limiting the fault current to 750mA. Fault conditions are also
reported to the USB controller via one of the independent
flag pins. Internal circuitry provides a soft-start that elimi-
nates momentary upstream voltage drops when the switch
is enabled, especially in bus powered applications.
Additional features include undervoltage lockout (2.4V),
fast turn-off, 2.8V to 5.8V input voltage range, thermal
shutdown to prevent switch failure from high current loads,
and 3.3V and 5V logic compatible enable inputs.
The ILC7526 and ILC7536 are available in both 8-pin SOIC
and 8-pin mini-DIP packages.
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Features
2 independent switches with ENABLE and FLAG
500mA continuous load current per switch (channel)
140mΩ maximum R
DSON
(switch on-resistance)
1.25A maximum short circuit current limit
Thermal shutdown
110µA typical on-state supply current
0.75µA typical off-state supply current
2.4V typical undervoltage lockout
2.8V to 5.8V input voltage range
1 ms turn-on (soft-start)
Fast turn-off
Outputs can be forced higher than inputs (off-state)
USB specification compliant
Active-high or active-low ENABLE versions
8-pin SOIC or 8-pin mini-DIP packages
Applications
• USB host and self powered hubs
• USB bus-powered hubs
• USB monitors, printers, cameras and other USB
controlled peripherals
• Hot plug-in power supplies
• Battery charger circuits
Ordering Information* (T
A
= -40°C to =85°C)
ILC7526-IK
ILC7526-IN
ILC7536-IK
ILC7536-IN
100k
100k
Active High Enable, SO-8 package
Active High, DIP-8 package
Active Low, SO-8 package
Active Low, DIP-8 package
V
CC
5.0V
100k
V
BUS
100k
D+
D-
GND
4.5V to 5.25V
Upstream VBUS
100mA max
V
BUS
D+
D-
GND
+
ILC7082-3.3
IN
1µF
OUT
GND
1µF
3.3V USB Controller
V
IN
ON/OFF
OVERCURRENT
OVERCURRENT
ON/OFF
ILC7526
ENA
FLGA
FLGB
ENB
OUTA
IN
47µF
0.1µF
GND
OUTB
47µF
V
BUS
D+
D-
GND
+
Data
Data
(Two Pair)
to USB Controller
Impala Linear Corporation
ILC7526/7536 1.5
(408) 574-3939
www.impalalinear.com
Dec 2000
1
IMPALA [ Impala Linear Corporation ]
