TPS22949_101 Datasheet, PDF (6/28 Pages) Texas Instruments – CURRENT-LIMITED LOAD SWITCH WITH LOW NOISE REGULATION CAPABILITY

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)
PARAMETER
TEST CONDITIONS
YZP PACKAGE
DRG PACKAGE
T_A
MIN TYP MAX MIN TYP MAX
UNIT
V_IN = 4.5 V
25°C
Full
0.3 0.4
0.5
0.4 0.5
0.6
V_IN = 3.3 V
25°C
Full
0.35 0.6
0.7
0.45 0.7
0.8
25°C
r_ON
ON-state resistance I_OUT = 20 mA V_IN = 2.5 V
Full
0.4 0.7
0.8
0.5 0.8
Ω
0.9
V_IN = 1.8 V
25°C
Full
0.6 0.9
1.0
0.7
1
1.1
V_IN = 1.62
V
25°C
Full
0.7 1.0
1.1
0.8 1.1
1.2
I_LIM
I_{LIM (INRUSH)}
Current limit
Power-ON inrush
current limit
(TPS22949A only)
V_OUT = 3 V
V_OUT = 3 V
V_IN = 3.3 V
Full
V_IN = 3.3 V
Full
100 150 200 100 150 200
mA
750
750
UVLO-CL
Undervoltage
shutdown
V_IN increasing
1.39 1.49 1.59 1.39 1.49 1.59 V
Undervoltage
shutdown hysteresis
30
30
mV
OC output logic low
voltage
I_SINK = 10 mA
V_IN = 4.5 V
V_IN = 1.8 V
Full
0.1 0.3
0.2 0.4
0.1 0.3
V
0.2 0.4
CURRENT LIMITER SWITCHING CHARACTERISTICS
V_IN = 3.3 V, T_A = 25°C, R_L = 500 Ω, C_L = 0.1 μF (unless otherwise noted)
PARAMETER
TEST CONDITIONS
t_ON
t_OFF
t_r
t_f
t_BLANK
t_RSTRT
t_INRUSH
Turn-ON time
Turn-OFF time
V_OUT rise time
V_OUT fall time
Overcurrent blanking time
Auto-restart time
Power-ON inrush current limit time
(TPS22949A only)
R_L = 500 Ω, C_CL = 0.1 μF
R_L = 500 Ω, C_CL = 0.1 μF
R_L = 500 Ω, C_CL = 0.1 μF
R_L = 500 Ω, C_CL = 0.1 μF
R_L = 500 Ω, C_CL = 0.1 μF
Short-circuit response time
V_IN = V_EN1 = 3.3 V, moderate over-current condition
V_IN = V_EN1 = 3.3 V, hard short
MIN TYP MAX UNIT
95
μs
2
μs
25
μs
10
μs
6
12
18 ms
40
80
120 ms
150
μs
11
μs
5
6
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