IC. TPS22985 Datasheet

TPS22985 Datasheet PDF


Part

TPS22985

Description

SUPPLY SELECTION IC

Manufacture

etcTI

Page 22 Pages
Datasheet
Download TPS22985 Datasheet


TPS22985 Datasheet
Not Recommended for New Designs
TPS22985
www.ti.com
SLVSBA9B – MARCH 2012 – REVISED JUNE 2012
Thunderbolt™ SUPPLY SELECTION IC
Check for Samples: TPS22985
FEATURES
1
2 2.8 V to 19.8 V
• Auto Selects 3.3 V Supply
• > 10-mA Low Power Switch
• > 500-mA 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
FET 1
FET 3
FET 4
FET 2
Logic
Core
RESETZ
ENB
CFG/OE
RX RXH
TX TXH
Level
Shifter
Level
Shifter
RXC
TXC
DESCRIPTION
The TPS22985 is a supply selection device for active
Thunderbolt™ cables. The device selects a supply
that is at 3.3V from two supply inputs and connects
this to two non-current limited outputs OUTA and
OUTB. When 3.3V is not present at either supply, the
outputs become high impedance.
The TPS22985 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 VDD
when the ENB input is high.
In Control Mode, OUTA functions 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
TPS22985 opens all switches and the outputs OUTA
and OUTB become high impedance. When the
connected VDD exceeds a maximum voltage of 3.6V,
it is disconnected from the outputs. VDD2 will only
connect when it is in the valid range and VDD1 is
greater than 3.6V
The TPS22985 is available in a 1.6mm x 1.6mm
WCSP package.
CFG2 (ThunderboltTM)
Cable uC and CDR Retimier
Figure 1. Typical Application
1
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 Intel Corporation.
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 © 2012, Texas Instruments Incorporated

TPS22985 Datasheet
TPS22985
Not Recommended for New Designs
SLVSBA9B – MARCH 2012 – REVISED JUNE 2012
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
PART NUMBER
TPS22985YFP
ORDERING INFORMATION
PACKAGE MARKING(1)
PACKAGE
YMD9US
YFP
DEVICE SPECIFIC FEATURES
WCSP
(1) Y= Year, M = Month, D = Sequence Code, 9U = TPS22985 Device Code, S = Wafer Fab/Assembly Site Code
Top View
Footprint
4321
Bump View
1 2 34
D DD4 D3 D2 D1
D DD1 D2 D3 D4
C CC4 C3 C2 C1
C CC1 C2 C3 C4
B BB4 B3 B2 B1
B BB1 B2 B3 B4
A AA4 A3 A2 A1
A AA1 A2 A3 A4
43 2 1
Die Size: 1.6mm x 1.6mm
Bump Size: 0.25mm
Bump Pitch: 0.4mm
1234
Table 1. TPS22985 Pin Mapping (Top View)
4
D VDD1
C OUTA
B RXH
A RXC
3
VDD1
OUTB
TXH
TXC
2
VDD2
OUTB
RESETZ
ENB
1
VDD2
GND
CPO
CFG/OE
DISSIPATION RATINGS
PACKAGE
YFP
THERMAL RESISTANCE
θJA
95°C/W
THERMAL
RESISTANCE (1)
θJB
63°C/W
POWER RATING
TA = 25°C
1050 mW
DERATING FACTOR
ABOVE (2)
TA = 25°C
10.5 mW/°C
(1) Simulated with high-K board
(2) Maximum power dissipation is a function of TJ(max), θJA and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA) / θJA.
2 Submit Documentation Feedback
Product Folder Link(s): TPS22985
Copyright © 2012, Texas Instruments Incorporated


Features Datasheet pdf Not Recommended for New Designs TPS2298 5 www.ti.com SLVSBA9B – MARCH 2012 – REVISED JUNE 2012 Thunderbolt™ S UPPLY SELECTION IC Check for Samples: T PS22985 FEATURES 1 •2 2.8 V to 19.8 V • Auto Selects 3.3 V Supply • > 1 0-mA Low Power Switch • > 500-mA High Power Switch • Reverse Current Block ing From OUT to VDD • Wake on UART In put Activity • UART RX and TX Buffers APPLICATIONS • Thunderbolt™ Cable s • Notebook Computers • Desktop Co mputers • Power Management Systems V DD1 VDD2 VDD1 VDD2 CPO Charge Pump FET 1 FET 3 FET 4 FET 2 Logic Core RESETZ ENB CFG/OE RX RXH TX TXH Leve l Shifter Level Shifter RXC TXC DESC RIPTION The TPS22985 is a supply select ion device for active Thunderbolt™ ca bles. The device selects a supply that is at 3.3V from two supply inputs and c onnects this to two non-current limited outputs OUTA and OUTB. When 3.3V is no t present at either supply, the outputs become high impedance. The TPS22985 has two modes of operation, Normal and Control. In Normal .
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