Datasheet

GND
D+
D-
V
BUS
USB Connector
3
5
4
2
TPS2511
8
7
6
1ILIM_SET
IN
PAD
OUT
DM
DP
GND
EN
CS
R
ILIM
5.0 V
Power
Supply
UDG-12107
GND
D+
D-
V
BUS
USB Connector
3
5
4
2
TPS2511
8
7
6
1ILIM_SET
IN
PAD
OUT
DM
DP
GND
EN
CS
R
ILIM
5.0 V
Power
Supply
UDG-12106
GND
D+
D-
V
BUS
USB Connector
3
5
4
2
TPS2511
8
7
6
1ILIM_SET
IN
PAD
OUT
DM
DP
GND
EN
CS
R
ILIM
5.0 V
Power
Supply
UDG-12105
GND
D+
D-
V
BUS
USB Connector
3
5
4
2
TPS2511
8
7
6
1ILIM_SET
IN
PAD
OUT
DM
DP
GND
EN
CS
R
ILIM
5.0 V
Power
Supply
UDG-12104
TPS2511
SLUSB18 –JUNE 2012 www.ti.com
Figure 35. 10-W USB Charger Application with Figure 36. 10-W USB Charger Application without
Power Switch Power Switch
Figure 37. 5-W USB Charger Application with Figure 38. 5-W USB Charger Application without
Power Switch Power Switch
Layout Guidelines
• TPS2511 placement. Place the TPS2511 near the USB output connector and at lest 22-µF OUT pin filter
capacitor. Connect the exposed Power PAD to the GND pin and to the system ground plane using a via
array.
• IN pin bypass capacitance. Place the 0.1-µF bypass capacitor near the IN pin and make the connection
using a low-inductance trace.
• ILIM_SET pin connection. Current limit set point accuracy can be compromised by stray leakage from a
higher voltage source to the ILIM_SET pin. Ensure that there is adequate spacing between IN pin
copper/trace and ILIM_SET pin trace to prevent contaminant buildup during the PCB assembly process. The
traces routing the R
ILIM
resistor to the device should be as short as possible to reduce parasitic effects on the
current-limit accuracy.
20 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated
Product Folder Link(s) :TPS2511