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TPS22949 Datasheet(PDF) 6 Page - Texas Instruments

Part # TPS22949
Description  CURRENT-LIMITED LOAD SWITCH WITH LOW NOISE REGULATION CAPABILITY
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS22949 Datasheet(HTML) 6 Page - Texas Instruments

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TPS22949
TPS22949A
SLVS908C – FEBRUARY 2009 – REVISED JANUARY 2010
www.ti.com
CURRENT LIMITER ELECTRICAL CHARACTERISTICS
over operating free-air temperature range, V+ = 3.3 V, EN1 = V+, EN2 = GND (unless otherwise noted)
YZP PACKAGE
DRG PACKAGE
PARAMETER
TEST CONDITIONS
TA
UNIT
MIN
TYP
MAX
MIN
TYP
MAX
25°C
0.3
0.4
0.4
0.5
VIN = 4.5 V
Full
0.5
0.6
25°C
0.35
0.6
0.45
0.7
VIN = 3.3 V
Full
0.7
0.8
25°C
0.4
0.7
0.5
0.8
rON
ON-state resistance
IOUT = 20 mA
VIN = 2.5 V
Full
0.8
0.9
25°C
0.6
0.9
0.7
1
VIN = 1.8 V
Full
1.0
1.1
25°C
0.7
1.0
0.8
1.1
VIN = 1.62
V
Full
1.1
1.2
ILIM
Current limit
VOUT = 3 V
VIN = 3.3 V
Full
100
150
200
100
150
200
Power-ON inrush
mA
ILIM (INRUSH) current limit
VOUT = 3 V
VIN = 3.3 V
Full
750
750
(TPS22949A only)
Undervoltage
UVLO-CL
VIN increasing
1.39
1.49
1.59
1.39
1.49
1.59
V
shutdown
Undervoltage
30
30
mV
shutdown hysteresis
VIN = 4.5 V
0.1
0.3
0.1
0.3
OC output logic low
ISINK = 10 mA
Full
V
voltage
VIN = 1.8 V
0.2
0.4
0.2
0.4
CURRENT LIMITER SWITCHING CHARACTERISTICS
VIN = 3.3 V, TA = 25°C, RL = 500 Ω, CL = 0.1 μF (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tON
Turn-ON time
RL = 500 Ω, CCL = 0.1 μF
95
μs
tOFF
Turn-OFF time
RL = 500 Ω, CCL = 0.1 μF
2
μs
tr
VOUT rise time
RL = 500 Ω, CCL = 0.1 μF
25
μs
tf
VOUT fall time
RL = 500 Ω, CCL = 0.1 μF
10
μs
tBLANK
Overcurrent blanking time
6
12
18
ms
tRSTRT
Auto-restart time
40
80
120
ms
Power-ON inrush current limit time
tINRUSH
RL = 500 Ω, CCL = 0.1 μF
150
μs
(TPS22949A only)
VIN = VEN1 = 3.3 V, moderate over-current condition
11
Short-circuit response time
μs
VIN = VEN1 = 3.3 V, hard short
5
6
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Copyright © 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS22949 TPS22949A


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