Datasheet

0
50
100
150
200
250
300
350
400
450
500
2 2.5 3 3.5 4 4.5 5 5.5 6 6.5
V
LDOIN
(V)
V
DO
(mV)
+ 125°C
+ 85°C
+ 25°C
0°C
− 40°C
I
OUT
= 1 A
G005
0
10
20
30
40
50
60
70
80
90
100
0 0.5 1 1.5 2 2.5 3 3.5
V
DO
(V)
PSRR (dB)
f = 1 kHz
f = 100 kHz
f = 1 MHz
f = 10 MHz
I
OUT
= 100 mA
G006
3.201
3.234
3.267
3.3
3.333
3.366
3.399
4.5 6.5 8.5 10.5 12.5 14.5 16.5 18.5
V
IN
(V)
V
OUT
(V)
+ 125°C
+ 85°C
+ 25°C
0°C
− 40°C
NOTE: Y axis shows 1% V
OUT
per division
I
OUT
= 1 A
G003
3.201
3.234
3.267
3.3
3.333
3.366
3.399
4.5 6.5 8.5 10.5 12.5 14.5 16.5 18.5
V
IN
(V)
V
OUT
(V)
+ 125°C
+ 85°C
+ 25°C
0°C
− 40°C
NOTE: Y axis shows 1% V
OUT
per division
I
OUT
= 10 mA
G004
3.201
3.234
3.267
3.3
3.333
3.366
3.399
0 100 200 300 400 500 600 700 800 900 1000
I
OUT
(mA)
V
OUT
(V)
+ 125°C
+ 85°C
+ 25°C
0°C
− 40°C
NOTE: Y axis shows 1% V
OUT
per division
G001
3.201
3.234
3.267
3.3
3.333
3.366
3.399
0 5 10 15 20 25
I
OUT
(mA)
V
OUT
(V)
+ 125°C
+ 85°C
+ 25°C
0°C
− 40°C
NOTE: Y axis shows 1% V
OUT
per division
G002
TPS54120
www.ti.com SBVS180C –JANUARY 2012–REVISED JUNE 2012
TYPICAL CHARACTERISTICS
At V
(PVIN)
= V
(VIN)
= 12 V, V
(LDOIN)
= DC-DC_OUT = 4.1 V, V
(OUT)
= 3.3 V, I
(OUT)
= 10 mA, V
(EN)
= floating, C
OUT
= 100 μF, and
C
SS
= C
NR
= 0.01µF (see Figure 28), unless otherwise noted.
LOAD REGULATION LOAD REGULATION UNDER LIGHT LOADS
Figure 1. Figure 2.
LINE REGULATION LINE REGULATION UNDER LIGHT LOADS
Figure 3. Figure 4.
LDO DROPOUT VOLTAGE POWER-SUPPLY RIPPLE REJECTION
vs LDO INPUT VOLTAGE vs LDO DROPOUT VOLTAGE
Figure 5. Figure 6.
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