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| TPS25921A Datasheet, PDF (9/38 Pages) Texas Instruments – Precise Current Limit and Over Voltage Protection | |||
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www.ti.com
TPS25921A, TPS25921L
SLVSCE1C â AUGUST 2014 â REVISED NOVEMBER 2015
Typical Characteristics (continued)
Conditions (unless otherwise noted) are â40°C ⤠TJ ⤠125°C, V(IN)= 12 V, V(EN UV) = 2 V, V(OVP) = 0 V, R(ILIM) = 95.3 kΩ, C(OUT)
= 2.2 μF, CSS = OPEN, FLT = OPEN. Positive current into terminals. All voltages referenced to GND (unless otherwise
noted). For all oscilloscope waveforms TA = 25°C.
0
0.28
R(ILIM) = Short
R(ILIM) = Open
-5
0.27
-10
0.26
-15
0.25
-20
-25
0
5
10
15
20
Power Dissipation (W)
PD = [V(IN)-
V(OUT)]*ILIMIT
25
D014
Figure 13. Current Limit Normalized (%) vs Power
Dissipation in the Device PD
135
120
105
90
75
60
45
-50 -25 0 25 50 75 100 125 150
Temperature (qC)
D016
Figure 15. RDS(ON) vs Temperature
0.24
-60 -30
0
30
60
90
Temperature (qC)
120 150
D015
Figure 14. Current Limit for R(ILIM) = Open and Short vs
Temperature
100000
10000
1000
100
TA -=40-4C0oC
TA 2=52C5oC
TA 8=58C5oC
TA 1=2152C5oC
10
1
0.1
0.1
1
10
100
Power Dissipation (W)
C014
Taken on 1-Layer board, 2oz.(0.08-mm thick) with GND plane
area: 14 cm2 (bottom)
Figure 16. Thermal Shutdown Time vs Power Dissipation
C(SS) = Open
C(OUT) = 4.7 nF
Figure 17. Turn ON with Enable
C(SS) = 1nF
C(OUT) = 4.7 nF
Figure 18. Turn ON with Enable
Copyright © 2014â2015, Texas Instruments Incorporated
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Product Folder Links: TPS25921A TPS25921L
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