Datasheet

IN
OC1
OC2
2
8
3
5
4
7
0.1 µF 10 µF
Internal
Function
OUT1
PowerSupply
3.3V
EN1
6
0.1 µF 10 µF
OUT2
Internal
Function
0.1 µF
10 µF
USB
Control
GND
V
BUS
D−
D+
TPS2062-1
EN2
GND
1
USB POWER-DISTRIBUTION REQUIREMENTS
TPS2062-1
TPS2065-1
TPS2066-1
www.ti.com ................................................................................................................................................ SLVS714A – FEBRUARY 2007 – REVISED MARCH 2009
Figure 26. High-Power Bus-Powered Function
USB can be implemented in several ways, and, regardless of the type of USB device being developed, several
power-distribution features must be implemented.
• Hosts/SPHs must:
– Current-limit downstream ports
– Report overcurrent conditions on USB V
BUS
• BPHs must:
– Enable/disable power to downstream ports
– Power up at < 100 mA
– Limit inrush current ( < 44 Ω and 10 µ F)
• Functions must:
– Limit inrush currents
– Power up at < 100 mA
The feature set of the TPS206x-1 allows them to meet each of these requirements. The integrated
current-limiting and overcurrent reporting is required by hosts and self-powered hubs. The logic-level enable and
controlled rise times meet the need of both input and output ports on bus-powered hubs, as well as the input
ports for bus-powered functions (see Figure 27 ).
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Product Folder Link(s): TPS2062-1 TPS2065-1 TPS2066-1