SP2026 Sipex, SP2026 Datasheet - Page 8

• Manufacturer Part Number: SP2026
• Description: +2.7V to +5.5V USB Power Control Switch
• Manufacturer: Sipex

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:
Rev. 1/23/02
Table 1. USB Protocol Compliance of the SP2026 device
USB REQUIREMENT
Inrush current limiting required
Suspend State of <500 A Required
Bus powered hubs must have 350mV drop from cable plug
to port
Voltage supplied to host or hub port is +4.75V to +5.25V
A device that draws bus power must have a stable supply
within 100ms of VBUS reaching +4.4V
Over-current reporting capability required
SP2026 +2.7V to +5.5V USB Power Control Switch
8
SP2026 COMPLIANT FEATURE
Soft start turns on in 1ms
Suspend Current of 1 A maximum
Switch on resistance of 140m
70mV at 500mA)
Operating range of +2.7V to +5.5V
Turns on in 1ms
Open drain fault flags
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.
Figure 4. Bypass Capacitor at the Supply Pins
FLGA 2
FLGB 3
ENB 4
ENA 1
SP2026
®
®
8 OUTA
7 IN
6 GND
5 OUTB
maximum (translates to
© Copyright 2002 Sipex Corporation
V
IN
0.1 F to 1.0 F