Texas Instruments 4Q 2006 USB Power Managers Family of Products, Port USB Hub Power Controllers

Design Considerations

USB High-Power Peripheral Switch With Dual Current Limit + LDO

Universal Serial Bus (USB) Power Managers	27
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4-Port USB Hub Power Controllers Power Distribution Switches

TPS2140/41/50/51—The TPS2140/41/50/51 target high-power USB peripherals such as ADSL modems. The devices contain a power switch and an LDO. The dual-current-limiting switch allows the use of high-value capaci- tance to stabilize the voltage from the USB bus.

Dual Power Switch + LDO for USB Bus-Powered Peripherals and Hubs

TPS2148/49—TPS2148 is a complete power management solution for USB bus-powered peripherals such as zip drives, while TPS2149 is for USB bus-powered hubs, such as keyboards with integrated hubs. TPS2148/9 each combine a 3.3-V LDO and dual power switch in a single MSOP package. The TPS2148 switch configura- tion allows power and board capacitance segmentation to meet USB system current requirements. The TPS2149 switches manage two independent or four ganged USB ports.

TPS207x—The TPS207x family provides the complete power solution for 4-port self- powered, bus-powered or hybrid USB hubs by incorporating current-limited switches for four ports, a 3.3-V 100-mA LDO, a 5-V LDO controller for self power (TPS2070, TPS2071) and a DP0 line control to signal an attach to the host.

Ease of Use—USB allows simplified installa- tion and improved performance for peripheral devices by eliminating the need to repeatedly load new drivers and establish individual set- tings. USB combines a multitude of existing interfaces into a single easy-to-use connector, greatly reducing system complexity and offer- ing manufacturers the ability to develop highly integrated products.

TPS204xB/5xB—The TPS204xB/5xB families of 80-mΩcurrent-limiting power switches meet all the USB power management requirements for controlling downstream ports, and include additional features to improve the design reliability. For example, when an over-current condition exists, the device intelligently shuts down only the port that sees the fault.

TPS202x/3x/6x—The TPS202x/3x/6x families of low on-resistance current-limiting power switches allow ganging of multiple ports to a single switch, as described in Application Note SLVA049. Though ganging can be cost- effective, all ports are affected by a fault.

USB Power Managers Family of Products

				Current Limit (min) (A)
	0.22	0.3	0.66	0.7	1.1	1.5	1.65	2.2
USB Power Distribution Switches
Quad	—	TPS2048A/58A	—	TPS2044B/54B	—	—	—	—
Triple	—	TPS2047B/57A	—	TPS2043B/53B	TPS2063/67	—	—	—
Dual	—	TPS2046B/56A	—	TPS2042B/52B	TPS2062/66	TPS2060/64	—	—
Single	TPS2020/30	TPS2045A/55A	TPS2021/31	TPS2041B/51B	TPS2022/32/61/65	—	TPS2023/33	TPS2024/34

		Bus Power
	5-V LDO	Mode
Device	Controller	Indicator	Pins	Package
4-Port USB Hub Power Controllers
TPS2070	Yes	Active Low	32	HTSSOP
TPS2071	Yes	Active High	32	HTSSOP
TPS2074	No	Active Low	24	SSOP
TPS2075	No	Active High	24	SSOP

Dual Power Switch + LDO for USB Bus-Powered Peripherals and Hubs

	TPS2145/55			TPS2147/57			TPS2148/58			TPS2149/59
	TSSOP-14			MSOP-10			MSOP-8			MSOP-8
VIN/SW1	LDO	LDO_OUT	VIN/SW1	LDO	LDO_OUT	VIN/SW1	LDO	LDO_OUT	VIN	LDO	LDO_OUT
		LDO_ADJ
LDO_EN		OC1			OC1	LDO_EN
		OUT1			OUT1	EN1		OUT1			OUT1
EN1			EN1						EN1		OC
SW2		OUT2	SW2		OUT2			OUT2			OUT2
EN2		OC2	EN2		OC2	EN2			EN2
GND			GND			GND			GND

Texas Instruments 4Q 2006 Interface Selection Guide