ILC7526(2001_08) View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
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ILC7526 Datasheet PDF : 2 Pages
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August 2001
Product Brief
ILC7526/36
USB Dual Power Control Switches
Applications
I USB Host and self-powered Hubs
I USB bus-powered Hubs
I USB monitors, printers, cameras
I Hot plug-in power supplies
I Battery Charger circuits
System Advantages
I Ultra low RDS(on) of 140mΩ per switch
I 500 mA continuous load current per channel
I 2 independent switches with Enables and Flags
I 2.4V typical undervoltage lockout
I 1.25 A maximum short circuit limit
I Soft-start with 1ms turn-on
I Over current/over temperature protection - no external
components
I USB Specification compliant
System Options
I ILC7526 has active High Enable
I ILC7536 has active Low Enable
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 configured to meet requirements for either
self powered or bus powered (Universal Serial Bus) USB
applications. The ILC7526 has active high ENABLE inputs, while
the ILC7536 ENABLE inputs are active low. With a maximum
RDS(on) value of 140 mΩ per switch, the USB voltage drop
requirements can be achieved. Each switch can also supply up to
500 mA, with internal circuitry limiting the fault current to 750
mA. Fault conditions are also reported to the USB controller via
one of the independent flag pins. Internal circuitry provides a soft
start that eliminates 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.
Power Saving Features
I <1µA typical off-state supply current
I 50µA typical on-state supply current
Package Options
I 8-pin SOIC
Application Circuit
Overcurrent Flags and separate
enable pins
+3.3V
VCC
10K
10K
100K
Output current to
500mA with 750mA
fault current limiting
+5V
VCC
USB
Controller
ON/OFF A
Over Current A
Over Current B
ON/OFF B
DA-
DA+
DB-
DB+
100K
ENA
FLGA
FLGB
ENB
OUTA
IN
GND
OUTB
ILC7526/36
4
47µF
0.1F
47µF
+5v
D-
D+
GND
+5V
D-
D+
GND
Extremely low supply current -
50µA on-state, <1µA off-state
Short-Circuit and Thermal
shutdown protection
USB
Port A
USB
Port B
Rev. 1.0.1
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