SP2026 Datasheet, PDF (8/14 Pages) Sipex Corporation – +2.7V to +5.5V USB Power Control Switch

USB Compliance
The SP2026 is ideal for self-powered and bus-
powered Universal Serial Bus (USB) applica-
tions. A USB port provides a +5.0V bus and
ground return line in addition to a twisted pair
for data.
The SP2026 will comply with the following
USB requirements:
1) The fault current is well below the UL 25VA
safety requirements;
2) The Flag Outputs are available to indicate
fault conditions to USB controllers;
3) The MOSFET switches' low on-resistance
meets USB voltage drop requirements;
4) Each MOSFET switch channel can supply
500mA as required by USB downstream de-
vices;
5) Soft start eliminates any momentary voltage
drops on the upstream port that may occur when
the switches are enabled in bus-powered appli-
cations.
Refer to Table 1 for a USB compliance sum-
mary of the SP2026. Additional features in-
clude the following:
6) An Undervoltage Lockout ensures that the
device remains off unless there is a valid input
supply voltage present;
7) +2.7V and +5.0V logic compatible enable
inputs;
8) Thermal Shutdown prevents the possibility of
catastrophic switch failure from high-current
loads;
8) The device is available in both active-high and
active-low versions.
Refer to Figures 7 to 14 for typical performance
characteristics of the SP2026.
®
ENA 1
FLGA 2
FLGB 3
ENB 4
SP2026
8 OUTA
7 IN
6 GND
5 OUTB
VIN
0.1µF to 1.0µF
Figure 4. Bypass Capacitor at the Supply Pins
USB REQUIREMENT
SP2026 COMPLIANT FEATURE
Inrush current limiting required
Soft start turns on in 1ms
Suspend State of <500µA Required
Suspend Current of 1µA maximum
Bus powered hubs must have 350mV drop from cable plug Switch on resistance of 140mΩ maximum (translates to
to port
70mV at 500mA)
Voltage supplied to host or hub port is +4.75V to +5.25V Operating range of +2.7V to +5.5V
A device that draws bus power must have a stable supply Turns on in 1ms
within 100ms of VBUS reaching +4.4V
Over-current reporting capability required
Open drain fault flags
Table 1. USB Protocol Compliance of the SP2026 device
Rev. 1/23/02
SP2026 +2.7V to +5.5V USB Power Control Switch
8
© Copyright 2002 Sipex Corporation