TPS2074_08 Datasheet, PDF (1/27 Pages) Texas Instruments – FOUR-PORT USB HUB POWER CONTROLLERS

TPS2074, TPS2075
FOUR-PORT USB HUB POWER CONTROLLERS
SLVS288A – SEPTEMBER 2000 – REVISED FEBRUARY 2001
D Complete USB Hub Power Solution
D Meets USB Specifications 1.1 and 2.0
D Independent Thermal and Short-Circuit
Protection
D 3.3-V Regulator for USB Hub Controller
D Overcurrent Logic Outputs
D 4.5-V to 5.5-V Operating Range
D CMOS- and TTL-Compatible Enable Inputs
D 185 µA Bus-Power Supply Current
D Available in 24-Pin SSOP Package
D –40°C to 85°C Ambient Temperature Range
description
DB PACKAGE
(TOP VIEW)
PG_DLY ₁
EN1 ₂
AGND ₃
PG 4
SP 5
SP 6
NC 7
3.3V_OUT 8
BPMODE^† 9
DP0_RST 10
EN2 11
DGND 12
24 ^BP_DIS
23 ^BP
22 ^OUT1
21 OUT2
20 OUT3
19 OUT4
18 OC4
17 OC3
16 OC2
15 OC1
14 EN4
13 EN3
The TPS2074 and TPS2075 provide a complete
USB hub power solution by incorporating three
major functions: current-limited power switches
for four ports, a 3.3-V 100-mA regulator, and a
DP0 line control to signal attach/detach of the hub.
These devices are designed to meet bus-pow-
ered and self-powered hub requirements. These
devices are also designed for hybrid hub
implementations and allow for automatic switch-
ing from self-powered mode to bus-powered
mode if loss of self-power is experienced. This
feature can be disabled by applying a logic high to
the BP_DIS input
Each port has a current-limited 100-mΩ N-
channel MOSFET high-side power switch for
500 mA self-powered operation. Each port also
has a current-limited 500-mΩ N-channel MOS-
FET high-side power switch for 100-mA bus-
powered operation. All the N-channel MOSFETs
are designed without parasitic diodes, preventing
current backflow into the inputs.
For applications where a 5-V regulator is needed,
use the TPS2070 or TPS2071 device.
NC – No internal connection
† _{Pin 9 is active low (BPMODE) for TPS2074}
and active high (BPMODE) for TPS2075.
simplified hybrid-hub diagram^‡
Power
Supply
1.5
kΩ
Upstream
Port
D+
D–
5V
GND
SP
OUT1
TPS2074
OUT2
DP0_RST
BP
OUT3
OUT4
3.3 V_OUT
BPMODE
VCC EN OC
DP0
DM0
Hub
Controller
DP1
DM1
DP2
DM2
DP3
DM3
DP4
DM4
‡ _{See Figure 33 for complete implementation.}
D+
D–
5V
GND
D+
D–
5V
GND
Downstream
Ports
D+
D–
5V
GND
D+
D–
5V
GND
SELECTION GUIDE
PACKAGED DEVICES
TA
USB HUB POWER CONTROLLERS
PIN COUNT BPMODE HTSSOP (DAP)
– 40°C to 85°C
Four-port with internal LDO controller
Four-port without internal LDO controller
Active low TPS2070DAP
32
Active high TPS2071DAP
Active low
—
24
Active high
—
† _{The DB package is available taped and reeled. Add an R suffix to the device type (e.g., TPS2074DBR).}
SSOP (DB)†
—
—
TPS2074DB
TPS2075DB
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2001, Texas Instruments Incorporated
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