SP2526 Datasheet, PDF (9/18 Pages) Sipex Corporation – +3.0V to +5.5V USB Power Control Switch

ENA 1
FLGA 2
FLGB 3
ENB 4
SP2526
8 OUTA
7 IN
6 GND
5 OUTB
VIN
0.1µF to 1.0µF
USB
Controller
OVERCURRENT
VIN
0.1µF
10kΩ
10kΩ
ENA 1
FLGA 2
FLGB 3
ENB 4
SP2526
8 OUTA
7 IN
6 GND
5 OUTB
Figure 4. Bypass Capacitor at the Supply Pins
Figure 5. An RC Filter for Overcurrent Faults
USB Requirement
SP2526 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 maximum
drop from cable plug to port
Switch on resistance of 140mΩ maximum
(translates to 70mV at 500mA)
Voltage supplied to host or hub port is +4.75V to +5.25V Operating range of +3.0V to +5.5V
A device that draws bus power must have a stable
supply within 100ms of V_BUS reaching +4.4V
Over-current reporting capability required
Turns on in 1ms
Open drain fault flags
Table 1. USB Protocol Compliance of the SP2526 device
Rev. 8/21/01
SP2526 +3.0V to +5.5V USB Power Control Switch
9
© Copyright 2001 Sipex Corporation