TPS22986 Datasheet, PDF (1/22 Pages) Texas Instruments – Thunderbolt Supply Selection IC

TPS22986
www.ti.com
SLVSBS5 – JANUARY 2013
Thunderbolt™ Supply Selection IC
Check for Samples: TPS22986
FEATURES
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•2 2.8 V to 19.8 V Input
• Auto Selects 3.3 V supply
• >10mA Low Power Switch
• >500mA High Power Switch
• Reverse Current Blocking from OUT to VDD
• Wake on UART Input Activity
• UART RX and TX Buffers
APPLICATIONS
• Thunderbolt™ Cables
• Notebook Computers
• Desktop Computers
• Power Management Systems
VDD1
VDD2
CPO
Charge
Pump
FET1
FET3
VDD (Internal)
RPUCFGOE
FET4
Logic
Core
CFG/OE
ENB
RESETZ
DESCRIPTION
The TPS22986 is a supply selection device for active
Thunderbolt™ cables. The device selects a 3.3V
input from two available supplies and connects the
chosen input to two outputs, OUTA and OUTB. When
a 3.3V supply is not present, the outputs become
high impedance.
The TPS22986 has two modes of operation, Normal
and Control. In Normal Mode, OUTA is always on
when a valid supply is present. OUTB is connected to
a valid supply when the ENB input is high.
In Control Mode, OUTA behaves the same as Normal
Mode and OUTB is controlled by a combination of
monitored inputs and valid supplies on VDD1 and
VDD2. When a valid VDD is available, the device
waits for a rising input on ENB and then disconnects
OUTB until the next falling RXH transition. Once the
next falling RXH transition occurs, the device
reconnects OUTB.
In either mode, when a valid VDD is not available, the
TPS22986 opens all switches and the outputs OUTA
and OUTB become high impedance. When the
connected VDD exceeds 3.6V, it is disconnected from
the outputs.
The TPS22986 is available in a 1.6mm x 1.6mm
WCSP package.
FET2
RXH
TXH
RXH
TXH
Level
Shifter
Level
Shifter
RXC
TXC
100k
Load
CDR and Microcontroller
RPDNORMAL
Figure 1. Typical Application
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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.
Thunderbolt is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated