Datasheet

TPS2540, TPS2540A
TPS2541, TPS2541A
SLVSAG2C –OCTOBER 2010– REVISED OCTOBER 2011 www.ti.com
PIN DESCRIPTIONS
Pin Descriptions
NAME PIN I/O DESCRIPTION
Power Switch
Input voltage; connect a 0.1-µF or greater ceramic capacitor from IN to GND as close
IN 1 PWR
to the device as possible.
OUT 12 PWR Power-switch output.
GND 14 PWR Ground connection; should be connected externally to Power PAD.
Internally connected to GND; used to heat-sink the part to the circuit board traces.
POWERPAD N/A
Connect to GND plane.
Current-Limit Threholds and Indication
External resistor used to set current-limit threshold when ILIM_SEL is LO;
ILIM0 16 I
recommended 16.9 kΩ ≤ R
ILIM
≤ 750 kΩ;
External resistor used to set current-limit threshold when ILIM_SEL is HI;
ILIM1 15 I
recommended 16.9 kΩ ≤ R
ILIM
≤ 750 kΩ;
Logic-level input signal used to dynamically change power switch current-limit
ILIM_SEL 4 I
threshold; logic LO selects ILIM0, logic HI selects ILIM1.
Active-low open-drain output, asserted during over-temperature or current limit
FAULT 13 O
conditions.
Input Logic Control Signals
Logic-level control input for turning the power switch and the signal switches on/off.
TPS2540/40A: When EN is low, the device is disabled, the signal and power
EN, DSC 5 I switches are OFF.
TPS2541/41A: When DSC is low, the device is disabled, the signal and power
switches are OFF and the output (OUT) capacitor is discharged.
CTL1 6 I Logic-level control inputs for controlling the charging mode and the signal switches.
The TPS2540/40A and TPS2541/41A use different control line truth tables. With the
CTL2 7 I
TPS2540/40A, the “000” configuration is used to force a discharge of the output
CTL3 8 I
(OUT) capacitor.
D+/D- Data Line Signals
D- data line to connector, input/output used for hand-shaking with portable
DM_IN 11 I/O
equipment.
D+ data line to connector, input/output used for hand-shaking with portable
DP_IN 10 I/O
equipment.
DM_OUT 2 I/O D- data line to USB host controller.
DP_OUT 3 I/O D+ data line to USB host controller.
N/C 9 No connect pin. Can be grounded or left floating.
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