Datasheet

IN
OUT
5V_DC/DC
5V_LDO
EN
19V
EN
DP
DM
OC
POWER Block
USB Host
Controller
I/O_EN
I/O_Sx
DM_OUT
DP_OUT
FAULT
EN
CTL1
CTL2
CTL3
STATUS
ILIM_SEL
Switches
Power
between LDO
and DC/DC
based on
/STATUS
ILIM_LO
ILIM_HI
DM_IN
DP_OUT
GND
USB
Connector
0011
55mA to ilimit_HI
after OUT discharge
LO
CASE II: System in S4 / S5; Device Attached
and Charging
TPS2543
Peripheral
Device
Connected
LDO Disconnected/
Shut-Down
DC-DC Switched-In
Embedded
Controller
VBUS
D-
D+
GND
IN
OUT
5V_DC/DC
5V_LDO
EN
19V
EN
DP
DM
OC
POWER Block
USB Host
Controller
I/O_EN
I/O_Sx
DM_OUT
DP_OUT
FAULT
EN
CTL1
CTL2
CTL3
STATUS
ILIM_SEL
Switches
Power
between LDO
and DC/DC
based on
/STATUS
ILIM_LO
ILIM_HI
DM_IN
DP_OUT
GND
USB
Connector
0011
Current falls to <45 mA
Ilimit set back to 55mA after 15s
Turns HI after 15s
CASE III: System in S4 / S 5 ; Device Attached
and Charging Completed
TPS2543
Peripheral
Device
Connected
DC-DC Disconnected /
Shut-Down
LDO Switched -In
Embedded
Controller
VBUS
D-
D+
GND
TPS2543
SLVSBA6 FEBRUARY 2012
www.ti.com
24 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated
Product Folder Link(s): TPS2543