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TPS2556DRBT Datasheet(PDF) 5 Page - Texas Instruments

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Part # TPS2556DRBT
Description  PRECISION ADJUSTABLE CURRENT-LIMITED POWER-DISTRIBUTION SWITCHES
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS2556DRBT Datasheet(HTML) 5 Page - Texas Instruments

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background image
Charge
Pump
Driver
UVLO
Current
Limit
Thermal
Sense
8-ms Deglitch
IN
GND
EN
ILIM
OUT
FAULT
CS
Current
Sense
R
L
C
L
OUT
TEST CIRCUIT
t
r
t
f
10%
90%
10%
90%
V
OUT
t
on
t
off
10%
90%
50%
50%
V
EN
V
OUT
V
EN
V
OUT
t
on
t
off
50%
50%
10%
90%
VOLTAGE WAVEFORMS
TPS2556
TPS2557
www.ti.com
SLVS931A
– NOVEMBER 2009 – REVISED FEBRUARY 2012
DEVICE INFORMATION
Pin Functions
PIN
I/O
DESCRIPTION
NAME
TPS2556
TPS2557
EN
4
–
I
Enable input, logic low turns on power switch
EN
–
4
I
Enable input, logic high turns on power switch
GND
1
1
Ground connection; connect externally to PowerPAD
IN
2, 3
2, 3
I
Input voltage; connect a 0.1
μF or greater ceramic capacitor from
IN to GND as close to the IC as possible.
FAULT
8
8
O
Active-low open-drain output, asserted during overcurrent or
overtemperature conditions.
OUT
6, 7
6, 7
O
Power-switch output
ILIM
5
5
O
External resistor used to set current-limit threshold; recommended
20 k
Ω ≤ RILIM ≤ 187 kΩ.
Internally connected to GND; used to heat-sink the part to the
PowerPAD
™
–
–
circuit board traces. Connect PowerPAD to GND pin externally.
FUNCTIONAL BLOCK DIAGRAM
PARAMETER MEASUREMENT INFORMATION
Figure 2. Test Circuit and Voltage Waveforms
Copyright
© 2009–2012, Texas Instruments Incorporated
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5
Product Folder Link(s): TPS2556 TPS2557


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