Datasheet


SLVS426 − MAY 2002
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26
Figure 39
SBRC CH3 LOAD TRANSIENT RESPONSE
100 µs/div
V
O
3
20 mV/div
I
O
3
2 A/div
6 A
0 A
V
IN
= 12 V, V
O
3 = 1.8 V
Figure 40
LDO LOAD TRANSIENT RESPONSE
100 µs/div
V
O
50 mV/div
I
O
1 A/div
3 A
30 mA
V
IN
= 12 V, V
(LDO_IN)
= V
O
3 = 1.8 V,
V
(LDO)
= 1.5 V
Figure 41
−40
−20
0
20
40
60
80
100 1K 10K 100K 1M
−120
−60
0
60
120
180
240
Phase Margin = 53 Degrees
Phase
Gain
V
IN
= 12 V,
V
O
1 = 3.3 V,
I
O
1 = 4 A
f − Frequency − Hz
Gain − dB
SBRC CH1 GAIN AND PHASE
Phase − Degrees
Figure 42
−40
−20
0
20
40
60
80
100 1K 10K 100K 1M
−120
−60
0
60
120
180
240
Phase Margin = 59 Degrees
Phase
Gain
V
IN
= 12 V,
V
O
2 = 5 V,
I
O
2 = 4 A
f − Frequency − Hz
Gain − dB
SBRC CH2 GAIN AND PHASE
Phase − Degrees
Figure 43
−40
−20
0
20
40
60
80
100 1K 10K 100K 1M
−120
−60
0
60
120
180
240
Phase Margin = 37 Degrees
Phase
Gain
V
IN
= 12 V,
V
O
3 = 1.8 V,
I
O
3 = 6 A
f − Frequency − Hz
Gain − dB
SBRC CH3 GAIN AND PHASE
Phase − Degrees
Figure 44
−40
−20
0
20
40
60
80
100 1K 10K 100K 1M
−120
−60
0
60
120
180
240
Phase Margin = 74 Degrees
Phase
Gain
V
IN
= 12 V,
V
(LDO_IN)
= V
O
3 =1.8 V,
I
(LDO)
= 3 A
f − Frequency − Hz
Gain − dB
LDO GAIN AND PHASE
Phase − Degrees